PORTABLE FAN AND FAN ASSEMBLY

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]This application is a Continuation-in-Part of the U.S. application Ser. No. 19/016,175 filed on Jan. 10, 2025, and entitled “NECK FAN,” which is a continuation-in-part of U.S. application Ser. No. 18/933,625, filed on Oct. 31, 2024 and U.S. application Ser. No. 18/421,213, filed on Jan. 24, 2024, the entire disclosures of which are incorporated herein by reference.

TECHNICAL FIELD

[0002]The present disclosure relates to the field of fans, and in particular, to a portable fan and a fan assembly.

BACKGROUND

[0003]As portable cooling equipment has received widespread attentions and been widely applied in hot seasons in recent years, especially a neck fan. The neck fan can be carried around and free the hands, and are favored by the majority of users.

[0004]However, as people continue to pursue comfortable experiences, they have gradually increasing expectations for the performance of the neck fan. In the scorching summer, users hope to achieve a faster and more direct cooling effect in a high-temperature environment, but the design of the traditional neck fan fails to fully meet this demand.

SUMMARY

[0005]In order to overcome the shortcomings of the prior art, the present disclosure provides a portable fan and a fan assembly.

[0006]An embodiment of the present disclosure provides a portable fan. The portable fan includes a first main body portion, a first power supply assembly, and a first fan assembly. The first main body portion is arc-shaped and includes an external first air guide path and a first mounting chamber arranged in the first main body portion. The first air guide path includes a first recessed surface outside the first mounting chamber. The first power supply assembly is arranged in the first mounting chamber. The first fan assembly is configured to blow air towards the first air guide path. The first recessed surface is configured to guide the air from the first fan assembly towards a side of the first main body portion. The first fan assembly includes a first motor and a first fan blade mounted on an output shaft of the first motor, and the first motor is electrically connected to the first power supply assembly.

[0007]Another embodiment of the present disclosure provides a neck fan. The neck fan includes the portable fan, another portable fan, and a connection part. The connection part is detachably connected to at least one of the portable fan and said another portable fan.

[0008]Another embodiment of the present disclosure provides a fan assembly. The fan assembly includes a first fan shell, a first motor, and a first fan blade connected to the first motor. The first fan blade is arranged in the first fan shell. The first fan shell includes a shell main body and an air outlet hood. The air outlet hood is positioned on a side of the shell main body and defines a plurality of air outlet holes. The air outlet hood includes a plurality of air guiding plates and an annular wall structure connecting a periphery of the plurality of air guiding plates. The plurality of air outlet holes are defined among the plurality of air guiding plates. The shell main body includes a circumferentially arranged sidewall structure, a mounting part arranged at an end in the sidewall structure, and an air guiding part connected between the mounting part and the sidewall structure. The air guiding part includes a plurality of air guiding blades arranged at interval and configured to direct air from the first fan blade toward the air outlet hood. The first fan blade and the first motor are positioned in the sidewall structure and posited on a side of the mounting part opposite to the air outlet hood, and the first motor is mounted on the mounting part and is configured to be electrically connected with an external first power supply assembly.

[0009]The beneficial effects of the present disclosure are as follows: By configuring the aforementioned first air duct path, the air from the first fan assembly can be directed to one side of the first main body portion, thereby expanding the air-blowing area of the first fan assembly and enhancing the user experience of the portable fan. Moreover, the fan assembly in the present disclosure further includes an air outlet hood capable of pressurizing the airflow to improve air discharge performance.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. The drawings in the following description are only some embodiments of the present disclosure. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0011]The present disclosure is further described below in detail in combination with the accompanying drawings and embodiments.

[0012]FIG. 1 is a schematic diagram of a neck fan according to Embodiment I of the present disclosure.

[0013]FIG. 2 is a schematic diagram of another viewing angle of the neck fan according to Embodiment I of the present disclosure.

[0014]FIG. 3 is a sectional view of the neck fan according to Embodiment I of the present disclosure.

[0015]FIG. 4 is an exploded view of the neck fan according to Embodiment I of the present disclosure.

[0016]FIG. 5 is a partial enlarged structural diagram of a portion V of FIG. 3.

[0017]FIG. 6 is a partial enlarged structural diagram of a portion VI of FIG. 4.

[0018]FIG. 7 is a schematic block diagram of the neck fan according to Embodiment I of the present disclosure.

[0019]FIG. 8 is a circuit diagram of a first charging interface of the neck fan of the present disclosure.

[0020]FIG. 9 is a circuit diagram of a first charging control module of the neck fan of the present disclosure.

[0021]FIG. 10 is a circuit diagram of a first battery of the neck fan of the present disclosure.

[0022]FIG. 11 is a circuit diagram of a first main control module of the neck fan of the present disclosure.

[0023]FIG. 12 is a circuit diagram of a first boost module and a first motor of the neck fan of the present disclosure.

[0024]FIG. 13 is a circuit diagram of a first main control module, a first boost module and a first motor of the neck fan according to an alternative embodiment of the present disclosure.

[0025]FIG. 14 is a circuit diagram of a first main control module, a first boost module and a first motor of a neck fan according to another modified embodiment of the present disclosure.

[0026]FIG. 15 is a circuit diagram of the first main control module, the first boost module and the first motor of the neck fan according to another modified embodiment of the present disclosure.

[0027]FIG. 16 is a schematic diagram of a neck fan according to Embodiment II of the present disclosure.

[0028]FIG. 17 is a schematic block diagram of a first main body portion of the neck fan according to Embodiment II of the present disclosure.

[0029]FIG. 18 is a schematic block diagram of a second main body portion of the neck fan according to Embodiment II of the present disclosure.

[0030]FIG. 19 is a schematic diagram of a neck fan according to Embodiment III of the present disclosure.

[0031]FIG. 20 is an exploded view of the neck fan according to Embodiment III of the present disclosure.

[0032]FIG. 21 is another exploded view of the neck fan according to Embodiment III of the present disclosure.

[0033]FIG. 22 is a cross-sectional view of the neck fan according to Embodiment III of the present disclosure.

[0034]FIG. 23 is an exploded view of a fan main body of the present disclosure.

[0035]FIG. 24 is an exploded view of FIG. 23 from another angle.

[0036]FIG. 25 is a schematic structural diagram of an outer side of a first main body portion of the fan main body shown in FIG. 23.

[0037]FIG. 26 is a schematic structural diagram of an inner side of a first outer cover body of the fan main body shown in FIG. 23; and

[0038]FIG. 27 is a schematic structural diagram of a metal grille of a first fan assembly of the fan main body according to a modified embodiment of Embodiment III of the present disclosure.

[0039]FIG. 28 is an exploded view of a fan assembly of a neck fan according to Embodiment IV of the present disclosure.

[0040]FIG. 29 is an exploded view of the fan assembly of the neck fan from another angle according to Embodiment IV of the present disclosure.

[0041]FIG. 30 is a cross-sectional view of fan assembly with an output shaft and a fan blade in a first limiting position.

[0042]FIG. 31 is a cross-sectional view of fan assembly with an output shaft and a fan blade in a second limiting position.

[0043]FIG. 32 is a schematic view of a neck fan in a first angle according to Embodiment V of the present disclosure.

[0044]FIG. 33 is a schematic view of the neck fan in FIG. 32 in a second angle.

[0045]FIG. 34 is a partial exploded view of the neck fan in FIG. 32.

[0046]FIG. 35 is a cross-sectional view of the neck fan in FIG. 32.

[0047]FIG. 36 is a schematic view of the neck fan in FIG. 32 in a third angle.

[0048]FIG. 37 is an enlarged view of the portion A in FIG. 36.

[0049]FIG. 38 is a schematic view of a neck fan according to Embodiment VI of the present disclosure.

[0050]FIG. 39 is a schematic view of the neck fan in FIG. 38 from another angle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiment I

[0051]Referring to FIG. 1 to FIG. 15, a neck fan includes a hanging main body land a first fan assembly 3. A straight-tube-shaped first air guide chamber 2 is arranged at a lower end portion of the hanging main body 1 in a protruding manner; the first air guide chamber 2 includes a first air inlet 22 arranged at the lower end portion of the hanging main body 1 and a first air outlet 23 opposite to the first air inlet 22; the hanging main body 1 includes an inner end portion 11 that is in contact with the neck of a user; the first air outlet 23 faces the inner end portion 11; the first fan assembly 3 is located in the first air guide chamber 2; and the first fan assembly 3 is configured to drive an air flow to flow from the first air inlet 22 to the inner end portion 11 via the first air outlet 23. Through the above structure, due to the straight-tube shape of the first air guide chamber 2, the neck fan forms a vertical blowing type fan capable of blowing air in a vertical direction. The first fan assembly 3 can drive the air flow to be blown from the first air inlet 22 to the inner end portion 11 through the first air outlet 23, greatly improving the air blowing efficiency. A user can directly feel the cool air blown directly to the neck when using the neck fan. This improves the overall performance of the fan. Furthermore, since the first air guide chamber 2 is a straight-tube-shaped cavity integrally protruding out of the hanging main body 1, this design improves the overall sense of beauty and sense of design of the product, helps to improve the wearing comfort of the neck fan, and improves the overall quality and user experience of the product.

[0052]In this embodiment, a hanging main body 1 is U-shaped, the hanging main body 1 includes a first main body portion 101, a second main body portion 102 and a connection member 103. The first main body portion 101 and the second main body portion 102 are detachably connected through the connection member 103. Furthermore, the connection member 103, which is flexible, can be a silica gel connection member, a plastic connection member or a rubber connection member. Moreover, the first fan assembly 3 is arranged on the first main body portion 101.

[0053]In this embodiment, the neck fan (such as the first main body portion 101) is provided with a first air guide path 12 that is inwards sunken; the first air guide path 12 extends from the first air outlet 23 to the inner end portion 11; and the first fan assembly 3 drives the air flow to be blown out from the first air outlet 23 towards the inner end portion 11 along the first air guide path 12. Further, a flexible first neck support 111 is connected to the inner end portion 11; a first air inlet gap 121 is formed between the first neck support 111 and the inner end portion 11; the first fan assembly 3 drives the air flow to be blown out from the first air outlet 23 towards the first air inlet gap 121 along the first air guide path 12. The first neck support 111 can be a silica gel neck support, a plastic neck support, a rubber neck support, or the like. Through the above structure, when the air flow is blown out from the first air outlet 23, under the guidance of the first air guide path 12 that is inwards sunken, the air flow will be blown towards the inner end portion 11 along the first air guide path 12. Due to the first air inlet gap 121, the air flow can be blocked in the gap, so that when a user wears the neck fan, the user can have a stronger feeling about the air flow at the inner end portion 11, and the heat dissipation effect is enhanced; and furthermore, the flexible neck support provides a more comfortable supporting effect for the user, which improves the user experience.

[0054]In this embodiment, a width of the first air guide path gradually decreases towards the inner end portion along the first air outlet; a width range of the first air guide path is 1 to 5 cm; a length range of the first air guide path is 8 to 16 cm; and a depth range of the first air guide path is 0 to 3 cm.

[0055]In this embodiment, the first main body portion 101 a first outer shell 1011 and a first inner shell 1012; the first air guide path 12 is arranged on the first inner shell 1012; and the first inner shell 1012 is detachably connected to the first outer shell 1011 through a buckle. It is convenient for a user to open and mount the first main body portion 101 for maintenance.

[0056]In this embodiment, a diameter of the first air inlet 22 is within a range of 30 mm to 60 mm, and a diameter of the first air outlet 23 is within a range of 30 mm to 60 mm. Through the above structure, an appropriate diameter range helps to achieve a balanced air flowrate, so that the fan can provide a sufficient air flow and maintain a good cooling effect. Furthermore, it helps to rationalize the overall structure, and the neck fan is convenient to carry and use.

[0057]In this embodiment, a straight-tube-shaped second air guide chamber 4 is further arranged at a lower end portion of the neck fan in a protruding manner; the second air guide chamber 4 includes a second air inlet 42 arranged at the lower end portion of the hanging main body 1 and a second air outlet 43 opposite to the second air inlet 42; the second air outlet 43 faces the inner end portion 11; the neck fan further includes a second fan assembly 5. The second fan assembly 5 is arranged in the second air guide chamber 4; and the second fan assembly 5 is configured to drive the air flow to be blown out from the second air inlet 42 towards the inner end portion 11 via the second air outlet 43. Through the above structure, due to the straight-tube shape of the second air guide chamber 4, the neck fan forms a vertical blowing type fan capable of blowing air in a vertical direction, so that the second fan assembly 5 can drive the air flow to be blown from the second air inlet 42 to the inner end portion 11 through the second air outlet 43, greatly improving the air blowing efficiency. A user can directly feel the cool air when using the neck fan. This improves the overall performance of the fan. Furthermore, since the second air guide chamber 4 is a straight-tube-shaped cavity integrally protruding out of the hanging main body 1, this design improves the overall sense of beauty and sense of design of the product, helps to improve the wearing comfort of the neck fan, and improves the overall quality and user experience of the product. It can be understood that the second fan assembly 5 is arranged in the second main body portion 102.

[0058]In this embodiment, the neck fan (such as the second main body portion 102) is provided with a second air guide path 13 that is inwards sunken; the second air guide path 13 extends from the second air outlet 43 to the inner end portion 11; and the second fan assembly 5 drives the air flow to be blown out from the second air outlet 43 towards the inner end portion 11 along the second air guide path 13. Further, a flexible second neck support 112 is connected to the inner end portion 11; a second air inlet gap 131 is formed between the second neck support 112 and the inner end portion 11; the second fan assembly 5 drives the air flow to be blown out from the second air outlet 43 towards the second air inlet gap 131 along the second air guide path 13. The second neck support 112 can be a silica gel neck support, a plastic neck support, a rubber neck support, or the like. Through the above structure, when the air flow is blown out from the second air outlet 43, under the guidance of the second air guide path 13 that is inwards sunken, the air flow will be blown towards the inner end portion 11 along the second air guide path 13. Due to the second air inlet gap 131, the air flow can be blocked in the gap, so that when a user wears the neck fan, the user can have a stronger feeling about the air flow at the inner end portion 11 more strongly, and the heat dissipation effect is enhanced; and furthermore, the flexible neck support provides a more comfortable supporting effect for the user, which improves the user experience.

[0059]In this embodiment, the second main body portion 102 includes a second outer shell 1021 and a second inner shell 1022; the second air guide path 13 is arranged on the second inner shell 1022; and the second inner shell 1022 is detachably connected to the second outer shell 1021 through a buckle. It is convenient for a user to open and mount the second main body portion 102 for maintenance.

[0060]In this embodiment, the neck fan further includes a first power supply assembly 8; the first power supply assembly 8 is located inside the hanging main body 1; the first power supply assembly 8 is electrically connected to the first fan assembly 3 to supply power to the first fan assembly 3; the first power supply assembly 8 includes a first battery 81 and a first circuit board 82; and the first battery 81 is electrically connected to the first circuit board 82 to supply power to the first circuit board 82. The neck fan further includes a second power supply assembly 9; the second power supply assembly 9 is located inside the hanging main body 1; the second power supply assembly 9 is electrically connected to the second fan assembly 5 to provide power to the second fan assembly 5; the second power supply assembly 9 includes a second battery 91 and a second circuit board 92; and the second battery 91 is electrically connected to the second circuit board 92 to supply power to the second circuit board 92. Through the above structure, the first power supply assembly 8 is arranged inside the hanging main body 1. This design can improve the overall appearance of the neck fan and effectively supply power to the first fan assembly 3, to ensure the reliability of the product. The second power supply assembly 9 is arranged inside the hanging main body 1. This design can improve the overall appearance of the neck fan and effectively supply power to the second fan assembly 5, to ensure the reliability of the product.

[0061]In this embodiment, the first fan assembly 3 includes a first fan shell 31, a first motor 32 fixedly mounted inside the first fan shell 31, and a first fan blade 33 mounted on a output shaft of the first motor 32; the first fan shell 31 is provided with a third air inlet 311, a first air duct 312, and a third air outlet 313; and the first air inlet 22, the third air inlet 311, the first air duct 312, the third air outlet 313, the first air guide chamber 2, and the first air outlet 23 are connected to each other in sequence. Through the above structural design, the first fan assembly 3 in this embodiment is provided with the independent outer shell, which facilitates independent mounting and replacement of the fan.

[0062]In another implementation, the first fan assembly 3 includes a first motor 32 and a first fan blade 33 mounted on a output shaft of the first motor 32; the first air inlet 22 is connected with a first air inlet hood 221; the first air inlet hood 221 is provided with several first air inlet holes 222; the first air outlet 23 is connected to a first air outlet hood 231; and the first air outlet hood 231 is provided with several first air outlet holes 232. Through the above structure, the design of a fan shell is omitted in this case, which saves the cost. Furthermore, a direction of the air flow is effectively achieved. The design of the first air inlet hood 221 and the first air outlet hood 231 is conducive to preventing other debris, such as hairs and paper scraps, from being sucked into the fan, which is conducive to maintaining the safety of the fan.

[0063]In this embodiment, the second fan assembly 5 includes a second fan shell 51, a second motor 52 fixedly mounted inside the second fan shell 51, and a second fan blade 53 mounted on a output shaft of the second motor 52; the second fan shell 51 is provided with a fourth air inlet 511, a second air duct 512, and a fourth air outlet 513; and the second air inlet 42, the fourth air inlet 511, the second air duct 512, the fourth air outlet 513, the second air guide chamber 4, and the first air outlet 23 are connected to each other in sequence. Through the above structural design, the first fan assembly 3 in this embodiment is provided with the independent outer shell, which facilitates independent mounting and replacement of the fan.

[0064]In some other embodiments, the second fan assembly 5 includes a second motor 52 and a second fan blade 53 mounted on a output shaft of the second motor 52; the second air inlet 42 and a fourth air inlet 511 are connected with a second air inlet hood 421; the second air inlet hood 421 is provided with several second air inlet holes 422; the second air outlet 43 and a fourth air outlet 513 are connected with a second air outlet hood 431; and the second air outlet hood 431 is provided with several second air outlet holes 432. Through the above structure, the design of a fan shell is omitted in this case, which saves the cost. Furthermore, a direction of the air flow is effectively achieved. The design of the second air inlet hood 421 and the second air outlet hood 431 is conducive to preventing other debris, such as hairs and paper scraps, from being sucked into the fan, which is conducive to maintaining the safety of the fan.

[0065]In this embodiment, the connection member 103 is provided with a installation hole 1031; the first main body portion 101 is provided with a first connection end 1013 connected to the connection member 103; the first connection end 1013 is detachably inserted into one end of the installation hole 1031; the second main body portion 102 is provided with a second connection end 1023 connected to the connection member 103; and the second connection end 1023 is detachably inserted into the other end of the installation hole 1031.

[0066]Further, a concave-convex first buckle 10131 is arranged at the first connection end 1013; the connection member 103 is provided with a first buckle slot 1032 that cooperates with the first buckle 10131; a concave-convex second buckle 10331 is arranged at the second connection end 1023; and the connection member 103 is provided with a second buckle slot 10231 that cooperates with the second buckle 10331. Through the above structure, the connection member 103 is a flexible silica gel connector. After the connection member 103 is bent to an angle, the first main body portion 101 and the second main body portion 102 can be easily inserted into the installation hole 1031. The first main body portion 101 is in clamping fit with the first buckle slot 1032 on an inner wall of the connection member 103 through the concave-convex first buckle 10131 arranged at the first connection end 1013, and the second main body portion 102 is in clamping fit with the second buckle slot 10231 on the inner wall of the connection member 103 through the concave-convex second buckle 10331 arranged at the second connection end 1023, so that it is convenient to mount and connect the first main body portion 101 to the second main body portion 102 to form a complete neck fan.

[0067]Referring to FIG. 3 to FIG. 6, the connection member 103 can be divided into a flexible connection portion 103a, and the flexible connection portion 103a can be provided with at least one installation hole 1031. The at least one installation hole 1031 is configured to extend along an extending direction D1 from the first connection end 1013 of the first main body portion 101 to the second connection end 1023 of the second main body portion 102, and the at least one installation hole 1031 is further configured to be sleeved and fixed onto the first connection end 1013 and the second connection end 1023, so that the first main body portion 101 and the second main body portion 102 are connected through the flexible connection portion 103a. The first main body portion 101 and the second main body portion 102 are connected through the flexible connection portion 103a, so that a flexible connection is formed between the first main body portion 101 and the second main body portion 102, thereby facilitating the wearing by users.

[0068]In this embodiment, the installation hole 1031 is an installation through hole which is arranged along the extending direction D1, each of two ends of the installation hole 1031 is respectively configured to sleeve and fix the first connection end 1013 and the second connection end 1023. Adopting one installation through hole is simple in process and offers flexible assembly space. However, in an alternative embodiment, the flexible connection portion 103a may also have two blind holes (i.e., non-through holes) which are arranged oppositely. The two blind holes are respectively configured to sleeve and fix the first connection end 1013 and the second connection end 1023.

[0069]In an embodiment, an inner sidewall of the at least one installation hole 1031 is provided with a first anti-detachment structure (such as a first buckle slot) and a second anti-detachment structure (such as a second buckle slot), the first anti-detachment structure is configured to be snap-fitted and connected to the first buckle 10131 on an outer surface of the first connection end 1013, the second anti-detachment structure is configured to be snap-fitted and connected to the second buckle 10331 on an outer surface of the second connection end 1023, and at least one of the first anti-detachment structure and the first buckle 10131 includes a plurality of convex-concave structures arranged in sequence along the extending direction D1.

[0070]Specifically, in this embodiment, the first anti-detachment structure includes a plurality of first buckle slots 1023a arranged along the extending direction, and the first buckle slot 1023a is configured to be meshed and connected to a plurality of projections arranged along the extending direction on the first buckle 10131; the second anti-detachment structure includes a plurality of second buckle slots 1023b arranged along the extending direction, and the second buckle slot 1023b is configured to be meshed and connected to a plurality of projections arranged along the extending direction on the second buckle 10331; the first anti-detachment structure is configured to be detachably connected to the first buckle 10131, and the second anti-detachment structure is configured to be detachably connected to the second buckle 10331.

[0071]In an embodiment, the flexible connection portion 103a is in an arc-shaped and provided with an inner side adjacent to a human neck and an outer side away from the human neck, the first anti-detachment structure is arranged on an inner sidewall of one side of the at least one installation hole 1031 adjacent to the outer side, and the second anti-detachment structure is arranged on an inner sidewall of the other side of the at least one installation hole 1031 adjacent to the outer side.

[0072]In an embodiment, the flexible connection portion 103a is provided with a first fixing structure 103b and a second fixing structure 103c, the first fixing structure 103b and the second fixing structure 103c are respectively arranged on each of two ends of the flexible connection portion 103a, the first fixing structure 103b is configured to connect to a third fixing structure 1013a of the first connection end 1013, the second fixing structure 103c is configured to connect to a fourth fixing structure 1023c of the second connection end 1023; the first fixing structure 103b is configured to detachably connect to the third fixing structure 1013a, and the second fixing structure 103c is configured to detachably connect to the fourth fixing structure 1023c.

[0073]In an embodiment, one of the first fixing structure 103b and the third fixing structure 1013a is a first fixing post 141, one of the first fixing structure 103b and the third fixing structure 1013a is a first fixing hole 142; one of the second fixing structure 103c and the fourth fixing structure 1023c is a second fixing post 143, one of the second fixing structure 103c and the fourth fixing structure 1023c is a second fixing hole 144, the first fixing structure 103b extends along a direction D2 of a first tangent line perpendicular to the extending direction, and the second fixing structure 103c extends along a direction D3 of a second tangent line perpendicular to the extending direction.

[0074]In an embodiment, the first fixing post 141 includes a first post body 1411 and a first buckle hook portion 1412 connected to one end of the first post body 1411 away from the flexible connection portion 103a, and an outer diameter of the first buckle hook portion 1412 is greater than an outer diameter of the first post body 1411 to prevent the first fixing post 141 from detaching from the first fixing hole 142; the second fixing post 143 includes a second post body 1431 and a second buckle hook portion 1432 connected to one end of the second post body 1431 away from the flexible connection portion 103a, and an outer diameter of the second buckle hook portion 1432 is greater than an outer diameter of the second post body 1431 to prevent the second fixing post 143 from detaching from the second fixing hole 144.

[0075]In an embodiment, the first fixing hole 142 includes a first portion 1421 corresponding to the first post body 1411 and a second portion 1422 corresponding to the first buckle hook portion 1412, and a hole diameter of the second portion 1422 is greater than a hole diameter of the first portion 1421; the second fixing hole 144 includes a third portion 1441 corresponding to the second post body 1431 and a fourth portion 1442 corresponding to the second buckle hook portion 1432, and a hole diameter of the fourth portion 1442 is greater than a hole diameter of the third portion 1441.

[0076]In an embodiment, the connection member 103 includes at least one neck support (such as a first neck support portion 111 and a second neck support portion 112), the at least one neck support is connected to the inner side of the flexible connection portion 103a adjacent to the human neck, and the at least one neck support is configured to form at least one air inlet gap with the first main body portion 101 or the second main body portion 102, so that air of the first main body portion 101 or the second main body portion 102 can enter the air inlet gap (such as 121, 131). Thereby preventing the human neck from directly contacting with the first main body portion 101 or the second main body portion 102, and avoiding the situation that wind cannot be provided to a surface of the neck skin.

[0077]As shown previously, in this embodiment, the at least one neck support includes the first neck support portion 111 and the second neck support portion 112, the first neck support portion 111 is positioned adjacent to the first main body portion 101 and is configured to form a first air inlet gap 121 with the first main body portion 101, and the second neck support portion 112 is positioned adjacent to the second main body portion 102 and is configured to form a second air inlet gap 131 with the second main body portion 102.

[0078]In an embodiment, a plurality of projections 103m are arranged on surfaces of the first neck support portion 111 and the second neck support portion 112 away from the flexible connection portion 103a, and the plurality of projections 103m are configured to form a gap between the at least one neck support and the human neck skin. The plurality of projections 103m are further configured to avoid the situation that the human neck directly contacts the first main body portion 101 or the second main body portion 102, resulting in the inability to supply wind to the surface of the neck skin.

[0079]It can be seen that the surfaces of the first neck support portion 111 and the second neck support portion 112 away from the flexible connection portion 103a are arc-shaped. A size of the plurality of projections gradually decreases from a middle to two ends along a vertical direction D4 perpendicular to the extending direction D1. Thereby achieving a comfortable wearing effect.

[0080]In this embodiment, the flexible connection portion 103a, the first neck support portion 111 and the second neck support portion 112 are made of a flexible material, such as the same flexible material (such as a flexible silica gel material), and they are integrally formed. Thereby achieving a comfortable wearing effect.

[0081]Furthermore, the flexible connection portion 103a includes a main body portion 103b, a first extending portion 103e and a second extending portion 103f, the main body portion 103d is provided with the at least one installation hole 1031, the first extending portion 103e and the second extending portion 103f are respectively connected to each of two ends of the main body portion 103b, the first extending portion 103e and the second extending portion 103f protrude from the main body portion 103b along the extending direction D1, the first extending portion 103e and the second extending portion 103f are respectively configured to cover and connect to an inner surface of the first connection end 1013 adjacent to the human neck and an inner surface of the second connection end 1023 adjacent to the human neck. The first fixing structure and the second fixing structure are respectively arranged on the first extending portion 103e and the second extending portion 103f, thereby the first fixing structure and the second fixing structure being adjacent to an inner side of the human neck. The first anti-detachment structure and the second anti-detachment structure are positioned away from an outer side of the human neck, and the internal and external cooperation enables the connection member 103 to reliably connect the first main body portion 101 and the second main body portion 102, preventing the connection parts from easily getting detached.

[0082]In this embodiment, the first air guide chamber 2 is located inside the first main body portion 101; the first main body portion 101 is further provided with a first mounting chamber 1014; and the first power supply assembly 8 is located inside the first mounting chamber 1014. The second air guide chamber 4 is located inside the second main body portion 102; the second main body portion 102 is further provided with a second mounting chamber 1024; and the second power supply assembly 9 is located inside the second mounting chamber 1024.

[0083]In this embodiment, the first main body portion 101 is further provided with a first switch 1015, a first charging interface 1016, and a first indication module 1017; and the first switch 1015, the first charging interface 1016, and the first indication module 1017 are all electrically connected to the first power supply assembly 8. The second main body portion 102 is further provided with a second switch 1025, a second charging interface 1026, and a second indication module 1027; and the second switch 1025, the second charging interface 1026, and the second indication module 1027 are all electrically connected to the second power supply assembly 9. Through the above structure, both the first switch 1015 and the second switch 1025 are configured to turn on or turn off the neck fan. The first charging interface 1016 and the second charging interface 1026 are configured to charge the first battery 81 and the second battery 91, respectively. The first indication module 1017 and the second indication module 1027 can be configured to: display whether the fan is in an ON or OFF state and display a wind rating of the fan.

[0084]In this embodiment, referring to FIG. 7 to FIG. 13, the neck fan further includes a first charging control module 811 electrically connected to the first circuit board 82, a first battery protection module 812, a first charging indication module 813, a first main control module 814 and a first boost module 815.

[0085]The first charging interface 1016 and the first charging control module 811 are both electrically connected to the first battery 81; the first charging indication module 813 is connected to the first charging control module 811; the first charging interface 1016 and the first charging control module 811 are configured to charge the first battery 81; the first battery level indication module 813 is configured to display a state of charging; and the first battery protection module 812 is electrically connected to the first charging control module 811 and the first battery 81 to protect the first battery 81.

[0086]The first main control module 814, the first boost module 815, and a first motor 32 are all electrically connected to the first battery 81; the first switch 1015 and the first indication module 1017 are electrically connected to the first main control module 814; and the first indication module 1017 is configured to display turning on or turning off of the neck fan.

[0087]In this embodiment, the neck fan further includes a second charging control module 921 electrically connected to the second circuit board 92, a second battery protection module 922, a second charging indication module 923, a second main control module 924 and a second boost module 925.

[0088]The second charging interface 1026 and the second charging control module 921 are both electrically connected to the second battery 91; the second charging indication module 913 is connected to the second charging control module 921; the second charging interface 1026 and the second charging control module 921 are configured to charge the second battery 91; the second charging indication module 923 is configured to display a state of charging; and the second battery protection module 922 is electrically connected to the second charging control module 921 and the second battery 91 to protect the second battery 91.

[0089]The second main control module 924, the first boost module 925, and a second motor 52 are all electrically connected to the second battery 91; the second switch 1025 and the second indication module 1027 are electrically connected to the second main control module 924; and the second indication module 1027 is configured to display turning on or turning off of the neck fan.

[0090]In this embodiment, the first main body portion 101 is provided with a first conductive end 1018; the second main body portion 102 is provided with a second conductive end 1019; when the first conductive end 1018 is communicated to the second conductive end 1019, the first switch 1015 is electrically connected to the first main control module 814 and the second main control module 924 respectively, and the second switch 1025 is electrically connected to the first main control module 814 and the second main control module 924 respectively; and the first switch 1015 or the second switch 1025 is configured to send a third fan working signal.

[0091]The first main control module 814 is configured to: receive the third fan working signal and drive the first boost module 815 to receive and boost the output voltage of the first battery 81, to drive the first motor 32 to work; and the second main control module 924 is configured to: receive the third fan working signal and drive the second boost module 925 to receive and boost the output voltage of the second battery 91, to drive the second motor 52 to work.

[0092]It can be understood that, referring to FIG. 14, in one embodiment, when any one of the first switch 1015 and the second switch 1025 is operated by the user, a third fan working signal can be sent, so that both the first motor 32 and the second motor 52 work. Specifically, the first conductive end 1018 of the first main body portion 101 may have a connector J1 for connecting with the connector J1 of the second conductive end 1019 of the second main body portion 102, thereby realizing the electrical connection between the first main control module 814 and the second main control module 924, and further realizing that when any one of the first switch 1015 and the second switch 1025 is operated by the user, a third fan working signal can be sent out. Specifically, the connector J1 may have two signal terminals, but it is not limited to the above.

[0093]It can be understood that when the connector J1 of the first conductive end 1018 of the first main body portion 101 is not connected to the connector J1 of the second conductive end 1019 of the second main body portion 102, that is, when the first main body portion 101 and the second main body portion 102 are independent of each other, the first switch 1015 and the second switch 1025 can independently control the operation of the two fan assemblies respectively, and they do not affect each other.

[0094]In addition, in some other embodiments, through preset program control, which one of the first switch 1015 and the second switch 1025 dominates the control of the two fan assemblies can be determined according to the need. Specifically, in another embodiment, only when one of the first switch 1015 and the second switch 1025 (such as the first switch) is operated by the user, will the third fan working signal be sent out to make the first motor 32 and the second motor 52 work simultaneously.

[0095]Specifically, referring to FIG. 13 and FIG. 14, the first switch 1015 and the second switch 1025 may include an operation switch S1, which can be a key switch. In other embodiments, referring to FIG. 15, the first switch 1015 and the second switch 1025 may also include a stepless adjustment key P1 (such as a knob or a slide adjustment key) that enables stepless adjustment. Through the stepless adjustment key P1, the rotational speed of the fan assembly can be controlled, thereby controlling the wind force. The stepless adjustment key P1 includes, but is not limited to, stepless adjustment devices such as a potentiometer with variable electric resistance and an encoder. In one embodiment, the stepless adjustment key P1 may include a plurality of connection terminals and at least one adjustment pin. One of the plurality connection terminals can be grounded, and at least one adjustment pin position can be operated by the user so that the other connection terminals output corresponding stepless adjustment signals. In other embodiments, a plurality of stepless adjustment pins can be provided, thus increasing more adjustment ranges and functions. It can be understood that the stepless adjustment key P1 enables the user to control the wind force of the neck fan according to their own needs, improving the user experience.

[0096]Furthermore, in some embodiments, the first switch 1015 or the second switch 1025 is configured for user operation, such as being pressed, touched, slid, or rolled, or any combination thereof. As shown in FIGS. 13 and 14, the operation switch S1 can be a press switch. Moreover, the operation can include long-duration or short-duration operations. Specifically, the long-duration operation involves continuous operation exceeding a first preset time (e.g., 3 seconds), while the short-duration operation involves continuous operation within a second preset time (e.g., 1 second). The specific durations of the first and second preset times can be set according to actual needs. For instance, when the operation is a long-duration operation, the first main control module 814 can control the power-on or power-off of the first fan body (or both the first fan body and the second fan body). When the first fan body (or both the first fan body and the second fan body) is powered on and the operation is a short-duration operation, the first main control module 814 can control adjustment of the first fan body (or both the first fan body and the second fan body).

[0097]Specifically, in one embodiment, after the neck fan enters the power-on state, the first main control module 814 can control an internal counting unit or an externally electrically connected counting unit to count signals emitted by the operation switch S1. When a current count is less than a preset number N (which can be set according to actual needs, e.g., set to 6), the first main control module 814 controls a rotational speed of the fan assembly of the first fan body (or both the first fan body and the second fan body) to increase by one gear based on the signals from the operation switch S1. When the current count equals the preset number N, the first main control module 814 controls the rotational speed of the fan assembly of the first fan body (or both the first fan body and the second fan body) to reset to a minimum gear based on the signals from the operation switch S1.

[0098]In another embodiment, when the neck fan enters the power-on state and receives a signal from the operation switch S1, the first main control module 814 can first determine, through an internal judgment unit or an externally electrically connected judgment unit, whether the current gear of the first fan body (or both the first fan body and the second fan body) is the maximum gear (i.e., whether the rotational speed of the fan assembly is at the maximum). If the current gear is the maximum, the first main control module 814 controls the current gear of the first fan body (or both the first fan body and the second fan body) to switch to the minimum gear (i.e., the rotational speed of the fan components assembly to the minimum). If the current gear is not the maximum, the first main control module 814 controls the current gear of the first fan body (or both the first fan body and the second fan body) to increase by one gear, thereby increasing the rotational speed of the fan assembly by one gear.

[0099]In aforementioned embodiments, the rotational speed gears of the fan assembly of the first fan body and the second fan body can be multiple, specifically, for example, six gears.

[0100]It is understandable that when the first fan body and the second fan body are not electrically connected, they have the same structure and can operate independently. When the first fan body and the second fan body are electrically connected as a single unit, operating one of the first switch 1015 and the second switch 1025 (e.g., the first switch) by the user will emit a third fan operation signal, causing both the first motor 32 and the second motor 52 to operate simultaneously.

[0101]In this embodiment, the first main body portion 101 and the second main body portion 102 can be regarded as two independent fans electrically connected to each other to form the neck fan. The circuit diagrams of various circuit modules included in the two independent fans are the same.

[0102]Through the above structure, the first main body portion 101 and the second main body portion 102 are combined and spliced to form the complete U-shaped neck fan. At this time, the first conductive end 1018 is in conductive connection with the second conductive end 1019. When the user presses the first switch 1015 or the second switch 1025, the third fan working signal can be sent. At this time, after receiving the third fan working signal, the first main control module 814 drives the first boost module 815 to receive and boost the output voltage of the first battery 81, thereby driving the first motor 32 to work. The rotation of the first motor 32 can drive a first fan blade 33 to rotate, achieving the air blowing effect of the first fan assembly. After receiving the third fan working signal, the second main control module 924 drives the second boost module 925 to receive and boost the output voltage of the second battery 91, thereby driving the second motor 52 to operate. The rotation of the second motor 52 can drive a second fan blade 53 to rotate, achieving the air blowing effect of the second fan assembly.

[0103]It can be understood, the first main control module 814 of FIG. 11 and the first boost module 815 may have other embodiments. Referring to FIG. 12, in other embodiment, a boost control chip U2 of the first boost module 815 can be omitted. Specially, in the embodiment of FIG. 13, the first boost module 815 includes an inductor L1 and a switch element Q2, a control terminal of an MCU of the first main control module 814 is electrically connected to a control terminal of the switch element Q2, a first connection terminal of the switch element Q2 is electrically connected to the battery BAT via the first inductor L1, and a second connection terminal of the switch element Q2 is grounded. The first connection terminal of the switch element Q2 is also electrically connected to the first motor MG1, in detail, the first connection terminal of the switch element Q2 is also electrically connected to the first motor MG1 via a diode D4. The MCU of the first main control module 814 is configured to turn on/turn off the switch element Q2, such that a voltage of the battery BAT can boost, and a boosted voltage can be provided to the first motor MG1 to drive the first fan blade 33. Further, the second main control module 924 and the second boost module 925 of FIG. 5 also can have the same structure of the first boost module 815 and the first main control module 814 of FIG. 13, such that another boosted voltage can be provided to the second motor to drive the second fan blade 53.

Embodiment II

[0104]Referring to FIG. 16 to FIG. 18, a difference between Embodiment II and Embodiment I is only that the first main body portion 101 and the second main body portion 102 of the neck fan are removed to form two independent fans, so that the first main body portion 101 and the second main body portion 102 are two small fans capable of working alone.

[0105]In this embodiment, the first main body portion 101 includes a first charging control module 811, a first battery protection module 812, a first charging indicator module 813, a first main control module 814, and a first boost module 815 which are electrically connected to the first circuit board 82.

[0106]The first charging interface 1016, the first charging control module 811, and the first charging indication module 813 are all electrically connected to the first battery 81; the first charging interface 1016 and the first charging control module 811 are configured to charge the first battery 81; the first charging indication module 813 is configured to display a battery level of the first battery 81; and the first battery protection module 812 is electrically connected to the first charging control module 811 and the first battery 81 to protect the first battery 81.

[0107]The first main control module 814, the first boost module 815, and a first motor 32 are all electrically connected to the first battery 81; the first switch 1015 and the first indication module 1017 are electrically connected to the first main control module 814; the first switch 1015 is configured to send a first fan working signal; the first main control module 814 is configured to: receive the first fan working signal and drive the first boost module 815 to receive and boost an output voltage of the first battery 81, to drive the first motor 32 to work; and the first indication module 1017 is configured to display turning on or turning off of the neck fan.

[0108]Through the above structure, the first charging interface 1016 is configured to charge the first battery 81; the first charging control module 811 is configured to control the charging of the first battery 81; when the first switch 1015 is turned on, the first fan working signal is sent; when receiving the first fan working signal, the first main control module 814 is configured to drive the first boost module 815 to receive and boost the output voltage of the first battery 81, to drive the first motor 32 to work; and the first main control module 814 can further adjust the speed of the first motor 32 by controlling the output voltage of the first boost module 815.

[0109]In this embodiment, the second main body portion 102 includes a second charging control module 921, a second battery protection module 922, a second charging indicator module 923, a second main control module 924, and a second boost module 925 which are electrically connected to the second circuit board 92.

[0110]The second charging interface 1026, the second charging control module 921, and the second charging indication module 923 are all electrically connected to the second battery 91; the second charging interface 1026 and the second charging control module 921 are configured to charge the second battery 91; the first charging indication module 923 is configured to display a battery level of the second battery 91; and the second battery protection module 922 is electrically connected to the second charging control module 921 and the second battery 91 to protect the second battery 91.

[0111]The second main control module 924, the second boost module 925, and a second motor 52 are all electrically connected to the second battery 91; the second switch 1025 and the second indication module 1027 are electrically connected to the second main control module 924; the second switch 1025 is configured to send a second fan working signal; the second main control module 924 is configured to: receive the second fan working signal and drive the second boost module 925 to receive and boost an output voltage of the second battery 91, to drive the second motor 52 to work; and the second indication module 1027 is configured to display turning on or turning off of the neck fan.

[0112]Through the above structure, the second charging interface 1026 is configured to charge the second battery 91; the second charging control module 921 is configured to control the charging of the second battery 91; when the second switch 1025 is turned on, the second fan working signal is sent; when receiving the second fan working signal, the second main control module 924 is configured to drive the second boost module 925 to receive and boost the output voltage of the second battery 91, to drive the second motor 52 to work; and the second main control module 924 can further adjust the speed of the second motor 52 by controlling the output voltage of the second boost module 925. This structural design achieves an effect of using independent portions as independent fans after the neck fan is disassembled, bringing higher flexibility, and a user can select an appropriate usage method according to a specific need.

Embodiment III

[0113]Referring to FIG. 19 to FIG. 26, Embodiment III of the present disclosure provides a neck fan. It can be understood that the descriptions of Embodiment I and Embodiment II mentioned previously are basically applicable to the neck fan of Embodiment III. Moreover, the following mainly describes the key contents of Embodiment III and the difference from Embodiment I and Embodiment II.

[0114]The neck fan includes a hanging main body 1. The hanging main body 1 includes a first main body portion 101, a second main body portion 102, a connection member 103 connecting the first main body portion 101 and the second main body portion 102, a first fan assembly 3 arranged at one end of the first main body portion 101 away from the connection member 103, and a second fan assembly 5 arranged at one end of the second main body portion 102 away from the connection member 103.

[0115]The connection member 103 is detachably connected to both the first main body portion 101 and the second main body portion 102; the first main body portion 101 is detachably connected to the first fan assembly 3; and the second main body portion 102 is detachably connected to the second fan assembly 5. Thus, all five portions of the neck fan are detachably connected, forming a modular design. This not only facilitates assembly but also reduces the costs of assembly and maintenance. Furthermore, users can disassemble, assemble, store by themselves and conduct DIY designs and so on, thereby improving the user experience.

[0116]The first main body portion 101 has an arc-shaped structure, and includes a concave first air guide path 12 positioned on a surface of one side of the first main body portion 101 and extended along an extending direction of the arc-shaped structure. Moreover, the first fan assembly 3 is arranged at one end of the first main body portion 101 and is configured to blow air towards the first air guide path 12. The first air guide path is configured to guide air of the first fan assembly 3 to one side of the first main body portion 101 (one side of the user's neck) and one end of the first main body portion 101 away from the first fan assembly 3 (such as the back of the user's neck).

[0117]The second main body portion 102 has an arc-shaped structure, and includes a concave second air guide path 13 positioned on a surface of one side of the second main body portion 102 and extended along an extending direction of the arc-shaped structure. Moreover, the second fan assembly 5 is arranged at one end of the second main body portion 102 and is configured to blow air towards the second air guide path 13. The second air guide path is configured to guide air of the second fan assembly 5 to one side of the second main body portion 102 (the other side of the user's neck) and one end of the second main body portion 102 away from the second fan assembly 5 (such as the back of the user's neck).

[0118]Furthermore, the first main body portion 101 and the first fan assembly 3 can also be assembled into one to form a first fan main body, and the second main body portion 102 and the second fan assembly 5 can also be assembled into one to form a second fan main body. Thus, a neck fan can be disassembled into two fan main bodies for use according to users' needs. It can be understood that when used as a neck fan, one fan main body and the other fan main body are respectively arranged on both sides of the user's neck. Moreover, the fact that a neck fan can be disassembled into two fan main bodies for use according to users' needs can enrich usage scenarios, facilitate storage and improve the user experience.

[0119]The first fan assembly 3 includes a straight-tube-shaped first fan shell 31, and the first fan shell 31 is detachably connected to the hanging main body 1 and is located within a first accommodating chamber 15, and the first fan shell 31 is provided with a third air inlet 311 and a third air outlet 313.

[0120]Through the above structure, due to the straight-tube shape of the first fan shell 31, the neck fan is formed into a vertical blowing type fan capable of blowing air in a vertical direction. The first fan assembly 3 can drive the air flow to be blown from the third air inlet 311 towards the user's neck via the third air outlet 313 along the first air guide path 12, greatly improving the air-blowing efficiency. The user can directly feel the cool air blown to the neck when using the neck fan, thereby improving the overall performance of the fan. Furthermore, the first fan shell 31 is detachably connected to the hanging main body 1, so that separate mold—opening, machining, and assembling can be achieved during production. The production efficiency is improved, the production cost is reduced. Moreover, it is also convenient for storage and transportation, and the portability of the product is improved.

[0121]In this embodiment, a plurality of connection buckle slots 151 are provided in an inner side of the first main body portion 101 of the hanging main body 1 adjacent to the first accommodating chamber 15; a plurality of connection buckles 315 matched and clamped with the connection buckle slots 151 are arranged on an outer wall of the first fan shell 31; and the first fan shell 31 is in detachably buckled connection to the hanging main body 1. Specifically, the connection buckle slots 151 are symmetrically distributed on an inner side of the hanging main body 1. There are six groups of connection buckle slots 151. Each group includes two connection buckle slots 151. The connection buckles 315 are symmetrically located on the outer wall of the first fan shell 31. There are six groups of connection buckles 315, and each group includes two connection buckles 315. Through the above structure, users can manually install or remove the first fan shell 31 from the hanging main body 1. The six-group buckle-matching structure ensures the firmness of the splicing, preventing the first fan shell from detaching during the wearing and use process, and improving the safety and convenience of the neck fan.

[0122]In this embodiment, the first main body portion 101 of the hanging main body 1 is detachably connected with a first outer cover 16 on an outer side away from the first accommodating chamber 15. As in Embodiment I, the first main body portion 101 of the hanging main body 1 is provided with a first mounting chamber 1014, and the first power supply assembly 8 is located inside the first mounting chamber 1014. The first mounting chamber 1014 has an opening, and the first outer cover 16 is detachably covered at the opening.

[0123]In this embodiment, the first fan assembly 3 also includes a first motor 32 and a first fan blade 33 mounted on an output shaft of the first motor 32.

[0124]The first fan shell 31 can include a shell main body 31a, an air inlet cover 31b, a metal grille 3111 and an air outlet hood 31c.

[0125]The first fan blade 33 and the first motor 32 are arranged within the shell main body 31a. Specifically, the shell main body includes a cylindrical sidewall structure 310a, a mounting part 310b positioned at one end inside the sidewall structure 310a and an air guiding part 310c connected between the mounting part 310b and the sidewall structure 310a. The first fan blade 33 and the first motor 32 are arranged within the sidewall structure 310a, on one side of the mounting part 310b, and the first motor 32 is mounted on the mounting part 310b.

[0126]The air guiding part 310c includes a plurality of air guiding blades 310d arranged at intervals and is configured to guide wind from the first fan blade 33 based on a preset direction. Specifically, the thickness of each air guiding blade 310d can gradually increase along a direction from the first fan blade 33 to the third air outlet 313, thus achieving a better air guiding effect. The air inlet cover 31b can be annular, and the air inlet cover 31b is sleeved on one end of the shell main body 31a. Specifically, an outer side surface of one end of the shell main body 31a can be provided with a stepped groove 31f, and the air inlet cover 31b is sleeved on the stepped groove 31f. After mounting, the outer side surface of the air inlet cover 31b is flush with the outer side surface of the shell main body 31a. The metal grille 3111 is mounted on the inner side of the air inlet cover 31b.

[0127]The metal grille 3111 is provided with the third air inlet 311. The third air inlet 311 includes a plurality of air inlet holes. Each air inlet hole 311a can be circular, and the diameters of the plurality of air inlet holes 311a can be the same. Each air inlet hole 311a can have a diameter ranging from 0.5 mm to 4 mm. Such a size can prevent hair or debris from being sucked into the interior of the first fan assembly 3. It can be understood that the metal grille 3111 is relatively thin and lightweight. This is conducive to the miniaturization and light weighting of the product. In addition, since it is made of metal material, the size of the air inlet holes of the metal grille 3111 can be arranged to be relatively small, thereby effectively preventing foreign objects from entering the first fan assembly 3.

[0128]The third air outlet 313 includes a plurality of air outlet holes 3130 arranged on the air outlet hood 31c. Specifically, the air outlet hood 31c includes an annular wall structure 31g, a mounting structure 31h and a plurality of air guiding plates 3131. The plurality of air guiding plates 3131 are connected between the annular wall structure 31g and the mounting structure 31h. Moreover, the plurality of air outlet holes 3130 are defined as the spaces between the plurality of air guiding plates 3131.

[0129]The inner side surface of the annular wall structure 31g is an inclined surface or an arc-shaped surface, so that an inner diameter of the annular wall structure 31g gradually decreases along a direction from the third air inlet 311 to the third air outlet 313. Thus, the blowing wind has a pressurizing effect and the outlet wind intensity is improved. The mounting structure 31h includes an annular mounting wall 31i, a cover plate 31j connected to the annular mounting wall 31i and a mounting column 31k connected to an inner side of the cover plate 31j, and the mounting column 31k is connected to the mounting part 310b. Specifically, the mounting column 31k can be detachably inserted into a mounting hole of the mounting part 310b, so that a detachable connection is formed between the air outlet hood 31c and the shell main body 31a. Moreover, the cover plate 31j is circular and is positioned in the middle of the plurality of air outlet holes 3130, and a groove is arranged on an outer surface of the cover plate 31j for converging the outlet air.

[0130]The mounting structure 31h is further provided with a first alignment structure 31m, while the mounting part 310b has a second alignment structure 31n. The first alignment structure 31m and the second alignment structure 31n cooperate to achieve precise alignment and assembly of the shell main body 31a and the air outlet hood 31c. The number of both the first alignment structure 31m and the second alignment structure 31n can be one, two, or multiple. Specifically, one of the first alignment structure 31m and the second alignment structure 31n can be an alignment hole, and the other can be an alignment post that fits into the alignment hole.

[0131]The metal grille 3111 can prevent hair or debris from being sucked into the first fan shell, thereby avoiding damage to the fan assembly and reducing the fan's blowing wind force. The air guiding plates 3131 can gather the air blown towards the neck, thereby improving the blowing performance.

[0132]The first main body portion 101 further includes at least one air guiding vane 101h, and at least one air guiding vane 101h is arranged within the first air guide path 12 adjacent to the first fan assembly 3, and is configured to guide the wind from the first fan assembly 3.

[0133]In this embodiment, the number of air guiding vanes 101h is two. The two air guiding vanes 101h are respectively arranged on two sides of the first air guide path 12. Moreover, a distance between the two air guiding vanes 101h gradually increases along an air outlet direction of the first air guide path 12.

[0134]In this embodiment, a first conductive through hole 152 is provided in an inner side of the hanging main body adjacent to the first accommodating chamber 15. The first conductive through hole 152 is configured to allow a wire of the first fan assembly 3 to pass through to be communicated with a first power supply assembly 8. Moreover, the mounting part 310b can be provided with an opening 310e. The wire connected to the motor can pass through the opening 310e and then be connected to the first power supply assembly 8 via the first conductive through hole 152.

[0135]Through the above structure, when the neck fan needs to be assembled, the first outer cover 16 is first opened, and then the wire of the first fan assembly 3 is communicated with the first power supply assembly 8 in the first mounting chamber 1014 through the first conductive through hole 152. Then, the first outer cover 16 is closed. After the wire of the first fan assembly 3 is connected, the first fan shell 31 is assembled with the hanging main body 1 through the buckling between the connection buckles 315 and the connecting buckle slots 151, and finally a vertical blowing type neck fan that is conductive with the hanging main body 1 and easy to mount is obtained.

[0136]In this embodiment, a second accommodating chamber 17 is further inwards sunken in one side, opposite to the first accommodating chamber 15, of the lower end portion of the second main body portion 102 of the hanging main body. The neck fan further includes a second fan assembly 5. The second fan assembly 5 includes a straight-tube-shaped second fan shell 51. The second fan shell 51 is detachably connected to the hanging main body and is located in the second accommodating chamber 17. The second fan shell 51 is provided with a fourth air inlet 511 and a fourth air outlet 513. The second fan assembly 5 is configured to drive an air flow to be blown from the fourth air inlet 511 towards the inner end portion via the fourth air outlet 513. Through the above structure, similarly, due to the straight-tube shape of the second fan shell 51, the neck fan is formed into a vertical blowing type fan capable of blowing air in a vertical direction. The second fan assembly 5 can drive the air flow to be blown from the fourth air inlet 511 towards the inner end portion 11 via the fourth air outlet 513, greatly improving the air-blowing efficiency. A user can directly feel the cool air blown to the neck when using the neck fan, thereby improving the overall performance of the fan. Furthermore, the second fan shell 51 is detachably connected and assembled with the hanging main body 1, so that separate mold-opening, machining, and assembling can be achieved during production. The production efficiency is improved, the production cost is reduced, it is also convenient for storage and transportation, and the portability of the product is improved.

[0137]In this embodiment, a plurality of connection buckle slots 151 are provided in an inner side of the second main body portion 102 of the hanging main body adjacent to the second accommodating chamber 17; the plurality of connection buckles 315 matched and clamped with the connection buckle slots 151 are arranged on an outer wall of the second fan shell 51; and the second fan shell 51 is in detachably buckled connection to the hanging main body 1. Specifically, the connection buckle slots 151 are symmetrically distributed on an inner side of the second main body portion 102 of the hanging main body. There are six groups of connection buckle slots 151. Each group includes two connection buckle slots 151. The connection buckles 315 are symmetrically located on the outer wall of the second fan shell 51. There are six groups of connection buckles 315, and each group includes two connection buckles 315.

[0138]In this embodiment, a second outer cover 18 is detachably connected to the second main body portion 102 of the hanging main body on an outer side away from the second accommodating chamber 17. As in Embodiment I, the second main body portion 102 of the hanging main body 1 is provided with a second mounting chamber 1024, and the second power supply assembly 9 is located inside the second mounting chamber 1024. The second mounting chamber 1024 has an opening, and the second outer cover 18 is detachably covered at the opening.

[0139]Further, the specific structure of the second fan assembly 5 can be identical to the first fan assembly 3. The second fan assembly 5 further includes a second motor 52 and a second fan blade 53 mounted on an output shaft of the second motor. The second fan shell 51 can be structurally similar to the first fan shell 31. For example, it can include a shell main body 31a, an air inlet cover 31b, a metal grille 3111 and an air outlet hood 31c. The fourth air inlet 511 can also include a plurality of air inlet holes 311a arranged on the metal grille 3111 of the second fan shell 51. The fourth air outlet can also include a plurality of air outlet holes 3130 arranged on the air outlet hood 31c of the second fan shell 51. The specific structure of the second main body portion 102 can be the same as that of the first main body portion 101, and the second main body portion 102 and the first main body portion 101 can be arranged symmetrically. The second fan assembly 5 and the first fan assembly 3 can also be arranged symmetrically. Therefore, the specific structures of the second fan shell 51 and the second main body portion 102 will not be introduced repeatedly here.

[0140]In this embodiment, a second conductive through hole 171 is provided in an inner side of the hanging main body adjacent to the second accommodating chamber 17. The second conductive through hole 171 allows a wire of the second fan assembly 5 to pass through to be communicated with the second power supply assembly 9.

[0141]Through the above structure, after the assembling of the first fan shell 31 is completed, the second fan shell 51 is installed in the same manner. The second outer cover 18 is first opened, and then the wire of the second fan assembly 5 is communicated with the second power supply assembly 9 in the second mounting chamber 1024 through the second conductive through hole 171. Then, the second outer cover 18 is closed. After the wire of the second fan assembly 5 is connected, the second fan shell 51 is assembled with the hanging main body 1 through the buckling between the connection buckles 315 and the connecting buckle slots 151, and finally a vertical blowing type neck fan that is conductive with the hanging main body 1 and easy to mount is obtained.

[0142]It can be understood that the inner sides of the first outer cover 16 and the second outer cover 18 are provided with at least one first snap-fit member 160, and the outer sides of the first main body portion 101 and the second main body portion 102 are provided with at least one second snap-fit member 1010. The first snap-fit member 160 and the second snap-fit member 1010 are snap-fitted to enable the assembly of the first outer cover 16 and the first main body portion 101 as well as the assembly of the second outer cover 18 and the second main body portion 102. Specifically, the number of the first snap-fit member 160 and the second snap-fit member 1010 can be multiple, such as 16a, 16b, 16c, 16d and 101a, 101b, 101c, 101d. Moreover, the structures of the multiple first snap-fit members 16a, 16b, 16c, 16d can be different, and the multiple second snap-fit members 101a, 101b, 101c, 101d are of the structures that match and cooperate with the multiple first snap-fit members.

[0143]It can be understood that both the first fan assembly 3 and the second fan assembly 5 are vertical blowing type fan assemblies with the air inlet and the air outlet on the same axis. In the first fan assembly 3, the air inlet cover 31b, the first fan blade 33, the first motor 32, the shell main body 31a and the air outlet hood 31c are all arranged in a straight line. In the second fan assembly 5, the air inlet cover 31b, the second fan blade 53, the second motor 52, the shell main body 31a and the air outlet hood 31c are all arranged in a straight line. In this way, the first fan assembly 3 and the second fan assembly 5 can generate relatively strong wind and achieve a better air outlet effect.

[0144]Furthermore, according to Embodiment I and Embodiment II, it can be seen that the portable fan and the other portable fan can be respectively provided with corresponding and independent switches 1015 and 1025, so that the turning on and off of the portable fan and the other portable fan can be independently controlled by the corresponding switches 1015 and 1025.

[0145]Furthermore, referring to FIG. 27, in a modified embodiment of Embodiment III, the air inlet holes 311a of the metal grille 3111 can also be in a regular hexagon. The plurality of air inlet holes 311a are arranged in a honeycomb shape, and a surrounding wall 311b is arranged between two adjacent air inlet holes 311a. Such a design can make the air inlet area of the metal grille 3111 the largest, minimize its weight, wind resistance, and maximize its air inlet volume. Specifically, the width of the surrounding wall ranges from 0.05 mm to 2 mm.

Embodiment IV

[0146]Referring to FIG. 28 to FIG. 31, Embodiment IV of the present disclosure provides a fan assembly 2′. The fan assembly 2′ has a basically identical structure to that of the first fan assembly 3 (or the second fan assembly 5) in the aforementioned Embodiments 1 to 3. The following primarily introduces the distinguishing aspects between them.

[0147]Specifically, in the fan assembly 2′, the mounting part 252″ includes a mounting plate 2521″ and a mounting post 2522″ that is connected to the mounting plate 2521″ and extends toward the grille 27″. A blind hole 254″ is provided on the mounting post 2522″. The motor 21″ has a motor mounting hole 210″. The motor mounting hole 210″ is sleeved on the mounting post 2522 to mount the motor 21″ onto the mounting post 2522″. An opening of the blind hole 254″ faces a side where the motor 21″ is located, and the blind hole 254″ is configured to store lubricating oil required for rotation of the output shaft of the motor 21″.

[0148]The blind hole 254″ is further provided with a fixed post 212″ having a through-hole 211″ and a retaining ring 213″. The output shaft 23″ comprises a main body 231″ connected to the fan blades 22″ and a retaining portion 232″ connected to the main body 231″. The main body 231″ of the output shaft 23″ sequentially passes through the fixed post 212″ and the retaining ring 213″, positioning the retaining portion 232″ at an end of the retaining ring 213″ that is away from the fixed post 212″. The retaining portion 232″ includes a rod portion 2321″ and a retaining end 2322″ connected to an end of the rod portion 2321″ that is away from the fan blades 22″. A diameter of the retaining end 2322″ gradually decreases in the direction away from the fan blade 22″. An outer surface of the rod portion 2321″, along with the retaining end 2322″ and the main body 231″, forms a retaining groove 2323″. The retaining ring 213″ has a retaining hole 2130″. A diameter of the retaining hole 2130″ is larger than that of the rod portion 2321″ but smaller than that of the main body 231″ and the retaining end 2322″, thereby retaining the retaining ring 213″ in the retaining groove 2323″.

[0149]The fixed post 212″ can be a copper post, and the retaining ring 213″ may be an elastic spring piece capable of stretching and compressing along the extension direction of the output shaft 23, such as a torsion spring or a snap spring.

[0150]It can be understood that, through aforementioned structural arrangement, the retaining ring 213″ is retained in the retaining groove 2323″, and the output shaft 23″ drives the fan blades 22″ to move within the length range of the retaining groove 2323″ along the extension direction of the output shaft 23″. Specifically, the output shaft 23″ and the fan blades 22″ have a first retaining position as shown in FIG. 30 and a second retaining position as shown in FIG. 31, which allows the fan blades 22″ to be suspended relative to the motor 21″. During the rotation of the output shaft 23″ and the fan blades 22″, the retaining ring 213″ provides space for their movement, enabling smoother rotation of the output shaft 23″ and the fan blades 22″, thereby enhancing the service life of the fan assembly 2″. It can be understood that the diameter of the retaining end 2322″ gradually decreases in the direction away from the fan blades 22″, allowing the retaining end 2322″ to pass through the through-hole of the fixed post 212″ and the retaining ring 213″ during assembly, thereby securing it with the retaining ring 213″.

Embodiments V and VI

[0151]As shown in FIGS. 32 to 35, the portable fans of the neck fan 1′ provided in Embodiments 5 and 6 of the present disclosure have a basically identical structural with those in Embodiments 1 to 3. The primary difference lies in variation of the fan assembly 2′, which adopts a turbine fan blade assembly in Embodiments 5 and 6.

[0152]Specifically, the neck fan 1′ includes a first fan main body 11′ and a second fan main body 12′ configured to be placed respectively on two opposite sides of the human neck.

[0153]Both the first fan main body 11′ and the second fan main body 12′ include an outer casing 13′ and a fan blade assembly 21′.

[0154]The outer casing 13′ serves as a housing for both the first fan main body 11′ and the second fan main body 12′. No specific material is specified for the outer casing 13′; designers can make reasonable choices based on actual needs. For instance, the material of the outer casing 13′ may include, but is not limited to, plastics (such as ABS (Acrylonitrile-Butadiene-Styrene), PC (Polycarbonate), or PP (Polypropylene)), silicone (such as food-grade or skin-friendly silicone), or metals (such as stainless steel or magnesium alloy).

[0155]The outer casing 13′ includes an inner surface 131′ and an outer surface 132′.

[0156]The inner surface 131′ is a surface of the outer casing 13′ that is adjacent to the human neck. The inner surface 131′ includes a first portion 1311′ and a second portion 1312′. The first portion 1311′ is located at one end of the inner surface 131′. One side of the second portion 1312′ is connected to the first portion 1311′ and the other side of the second portion 1312′ is connected to a junction of the first fan main body 11′ and the second fan main body 12′. In other words, the first portion 1311′ is farther from the back of the human neck than the second portion 1312′.

[0157]The outer surface 132′ is the surface of the outer casing 13′ that is away from the human neck, positioned opposite to the inner surface 131′.

[0158]At least one of the first portion 1311′ and the outer surface 132′ is provided with an air inlet 133′. For example, it could be only the first portion 1311′ with an air inlet 133′, only the outer surface 132′ with an air inlet 133′, or both the first portion 1311′ and the outer surface 132′ are provided with the air inlets 133′.

[0159]The second portion 1312′ is recessed toward the outer surface 132′ to form an external air duct 134′ (which has a basically identical structural with the first and second air guide paths in Embodiments 1 to 3). An air outlet 135′ is provided at an end of the external air duct 134′ that is adjacent to the first portion 1311′.

[0160]As shown in FIGS. 32 to 35, the fan blade assembly 21′ (which has a basically identical structural with the first fan blade in Embodiments 1 to 3) is configured to propel air flow. It is positioned within the outer casing 13′ between the first portion 1311′ and the outer surface 132′. No specific installation method is prescribed for the connection between the fan blade assembly 21′ and the outer casing 13′; designers can make reasonable designs based on actual needs. For instance, the fan blade assembly 21′ may be detachably connected to the outer casing 13′ through at least one of methods such as screwing, clamping, or inserting. Alternatively, it may be non-detachably connected to the outer casing 13′ through riveting or gluing.

[0161]In this embodiment, the fan blade assembly 21′ includes a turbine fan blade 211′. A fan shaft of the turbine fan blade 211′ is oriented from the inner surface 131′ to the outer surface 132′. The turbine fan blade 211′ draws in air axially and expels it radially.

[0162]The turbine fan blade 211′ is configured to direct the air from the air inlet 133′ to the air outlet 135′. The air at the air outlet 135′ is then blown toward the human neck via the external air duct 134′. It can be understood that the side of the outer casing 13′ where the air inlet 133′ is located serves as the air intake side for the turbine fan blade 211′, while the side where the air outlet 135′ is located serves as the air exhaust side. When the turbine fan blade 211′ rotates, it propels air flow, creating a pressure differential. A low-pressure zone is formed on the air intake side, drawing in air from the air inlet 133′, while a high-pressure zone is formed on the air exhaust side, pushing air out through the air outlet 135′. This generates a continuous airflow. The external air duct 134′ guides the air flowing out from the air outlet 135′ toward the human neck, thereby cooling the human neck.

[0163]The fan blade assembly 21′ further includes a pressurization casing 212′. The turbine fan blade 211′ is placed inside the pressurization casing 212′. The pressurization casing 212′ has an inlet 212a′ corresponding to the air inlet 133′ and an outlet 212b′ corresponding to the air outlet 135′. By configuring the pressurization casing 212′, the pressurization casing 212′ converges the air flowing out radially from the turbine fan blade 211′, directing it to the outlet 212b′ of the pressurization casing 212′ and then to the external air duct 134′ through the air outlet 135′. Please referring to FIG. 35, the arrows indicate the direction of the airflow path.

[0164]Based on the neck fan 1′ in this embodiment of the present disclosure, by configuring the external air duct 134′ on the second portion 1312′ of the inner surface 131′ of the outer casing 13′ of both the first fan main body 11′ and the second fan main body 12′, the external air duct 134′ is placed outside the outer casing 13′. Consequently, the interior of the outer casing 13′ only needs to accommodate core components such as the turbine fan blade 211′, the motor, and the battery, eliminating the need for a complex air duct cavity. This significantly frees up the internal space of the outer casing 13′, allowing it to be made thinner and lighter, which is conducive to achieving a lightweight design for the neck fan 1′.

[0165]As illustrated in FIGS. 32 to 35, the external air duct 134′ extends from the end of the second portion 1312′ adjacent to the first portion 1311′ to the junction of the first fan main body 11′ and the second fan main body 12′. By designing the external air duct 134′ as an elongated duct that extends from the first portion 1311′ towards the junction of the first fan main body 11′ and the second fan main body 12′, the airflow path within the external air duct 134′ becomes shorter and more linear. This design facilitates the lightweight construction of the neck fan 1′. Moreover, the elongated external air duct 134′ effectively guides the air exiting from the air outlet 135′ towards the human neck, maximizing the cooling effect on the neck.

[0166]As shown in FIGS. 32 to 35, the second portion 1312′ includes an end face 1312a′ and an air guiding surface 1312b′. The end face 1312a′ is connected to the first portion 1311′, with the air outlet 135′ located thereon. The air guiding surface 1312b′ is connected to the end face 1312a′ and has a cross-section in the shape of a concave U. A width of the U gradually decreases from the end face 1312a′ towards the junction of the first fan main body 11′ and the second fan main body 12′. Specifically, the air guiding surface 1312b′ includes a first sub-surface, a second sub-surface, and a third sub-surface. The first sub-surface is positioned between the second and third sub-surfaces and connected to both the second and third sub-surfaces. The second and third sub-surfaces are located on two opposite sides of the first sub-surface and are positioned opposite each other. Together, the first, second, and third sub-surfaces form the aforementioned U-shape. From the side adjacent to the air outlet 135′ to the side farther away, a width of the external air duct 134′ gradually decreases. This design enables the external air duct 134′ to converge the air exiting from the air outlet 135′, minimizing air volume loss.

[0167]The outer surface 132′ includes a main surface 1321′ and a side surface 1322′. The side surface 1322′ is connected to a periphery of the main surface 1321′ and positioned between the main surface 1321′ and the inner surface 131′. The axial direction of the turbine fan blade 211′ is from the first portion 1311′ to the main surface 1321′. At least one of the first portion 1311′ and the main surface 1321′ is provided with the aforementioned air inlet 133′. The distance from the first portion 1311′ to the main surface 1321′ is less than the width of the first portion 1311′. The sidewall where a portion of the main surface 1321′ corresponding to the first portion 1311′ is located, the sidewall where the side surface 1322′ is located, and the sidewall where the first portion 1311′ locates collectively form a cavity for housing the turbine fan blade 211′. Considering the axial air intake and radial air exhaust characteristics of the turbine fan blade 211′, configuring the distance from the first portion 1311′ to the main surface 1321′ to be less than the width of the first portion 1311′ can effectively reduce the thickness of the outer casing 13′ at the location of the turbine fan blade 211′, achieving a lightweight design.

[0168]As shown in FIGS. 32 to 35, the air inlet 133′ includes a first air inlet 1331′ and a second air inlet 1332′. The first portion 1311′ is provided with the first air inlet 1331′, while the portion of the main surface 1321′ that corresponds to the first portion 1311′ is provided with the second air inlet 1332′. In this configuration, the turbine fan blade 211′ is a double-suction turbine fan blade 211′. The fan blade assembly 21′ further includes a motor located in the middle of the turbine fan blade 211′, with the motor's output shaft connected to the fan shaft of the turbine fan blade 211′. The motor drives the rotation of the turbine fan blade 211′, which draws in air from both sides along its axial direction through the first air inlet 1331′ and the second air inlet 1332′. The air merges at the periphery of the turbine fan blade 211′ and is then expelled radially, ultimately pushing air out through the air outlet 135′ to create a continuous airflow. By incorporating the first air inlet 1331′ on the first portion 1311′ and the second air inlet 1332′ on the corresponding portion of the main surface 1321′, a dual-sided air intake is formed for the turbine fan blade 211′. This effectively increases the air intake area. Under the same air volume conditions, the radial dimension of the dual-sided intake turbine fan blade 211′ is smaller than that of a single-sided intake turbine fan blade 211′, further reducing the width of the outer casing 13′ at the location of the turbine fan blade 211′ and achieving a compact design. Additionally, the dual-sided air intake of the turbine fan blade 211′ cancels out the axial thrust on the turbine fan blade 211′, reducing vibration and noise during rotation and extending the lifespan of both the turbine fan blade 211′ and the motor. Moreover, the dual-sided air intake creates a symmetrical internal air flow within the turbine fan blade 211′, minimizing eddy currents and backflow losses, and improving motor efficiency.

[0169]Of course, in other embodiments, if the air inlet 133′ is solely located on the first portion 1311′ or solely on the corresponding portion of the main surface 1321′, the turbine fan blade 211′ would be a single-suction turbine fan blade 211′. In this case, the fan blade assembly 21′ still includes a motor, which is positioned on the side of the turbine fan blade 211′ opposite to the air inlet 133′. The motor's output shaft is connected to the fan shaft of the turbine fan blade 211′, driving its rotation. The side of the turbine fan blade 211′ facing the air inlet 133′ acts as the air intake side, drawing in air from the air inlet 133′. The air is then expelled radially and ultimately pushed out through the air outlet 135′ to create a continuous airflow.

[0170]As shown in FIGS. 36-37, the first air inlet 1331′ includes multiple U-shaped air intake structures 1331a′ or annular air intake structures 1331a′ arranged sequentially in a ring from the center to the edge of the first portion 1311′. Each air intake structure 1331a′ includes multiple first air intake holes 1331d′ arranged along its extension direction. The second air inlet 1332′ includes multiple second air intake holes 1332a′. Each U-shaped air intake structure 1331a′ includes a U-shaped grille 1331b′ and multiple connecting portions 1331c′. The multiple connecting portions 1331c′ are spaced and connected to the outer edge of the U-shaped grille 1331b′. The outermost U-shaped air intake structure 1331a′ is connected to the outer casing 13′ via the connecting portions 1331c′, and each two adjacent U-shaped air intake structures 1331a′ are connected to each other via the connecting portions 1331c′. The intervals between two adjacent connecting portions 1331c′ are used to form the first air intake holes 1331d′. For each annular air intake structure, it includes an annular grille and multiple connecting portions. The multiple connecting portions are spaced and connected to the outer edge of the annular grille. The outermost annular air intake structure is connected to the outer casing 13′ via the connecting portions, and each two adjacent annular air intake structures are connected to each other via the connecting portions. The intervals between two adjacent connecting portions are used to form the first air intake holes 1331d′. By configuring the first air intake holes 1331d′ and the second air intake holes 1332a′, the two sides of the turbine fan blade 211′ that are opposite each other along its axial direction serve as air intake sides, drawing in air from the first air intake holes 1331d′ and the second air intake holes 1332a′ respectively. The air merges at the periphery of the turbine fan blade 211′ and is then expelled radially, ultimately pushing air out through the air outlet 135′ to create a continuous airflow. The arrangement of the first air intake holes 1331d′ and the second air intake holes 1332a′ not only facilitates smooth air flow into the outer casing 13′ from these holes under the rotation of the turbine fan blade 211′ but also effectively reduces or even eliminates possibility of the user's hair getting entangled with the turbine fan blade 211′.

[0171]As shown in FIGS. 32 to 35, the outer casing 13′ includes an inner side panel 13a′ and an outer casing main body 13b′ connected to the edge of the inner side panel 13a′. The inner side panel 13a′ has the aforementioned inner surface 1322′. The inner side panel 13a′ incudes the first portion 1311′ and the second portion 1312′. The outer casing main body 13b′ has the aforementioned main surface 1321′. The distance between the second portion 1312′ and the main surface 1321′ is less than that between the first portion 1311′ and the main surface 1321′. This configuration effectively forms an external air duct 134′ that is recessed towards the main surface 1321′ on the second portion 1312′ of the inner surface 1322′ of the outer casing 13′.

[0172]The inner side panel 13a′ and the outer casing main body 13b′ are respectively integrally formed and then detachably connected as a whole. The inner side panel 13a′ can be integrally formed through, but not limited to, injection molding or 3D printing. Similarly, the outer casing main body 13b′ can also be integrally formed through, but not limited to, injection molding or 3D printing. The specific detachable connection method between the inner side panel 13a′ and the outer casing main body 13b′ is not limited here, and designers can make reasonable designs according to actual needs. For example, the inner side panel 13a′ can be fixedly connected to the outer casing main body 13b′ through at least one of methods such as screw connections, snap connections, or plug connections. The design of separately integrally forming the inner side panel 13a′ and the outer casing main body 13b′ is beneficial for reducing the processing difficulty of both. The detachable connection between the inner side panel 13a′ and the outer casing main body 13b′ facilitates replacement of damaged components such as the turbine fan blade 211′ in later stages.

[0173]As shown in FIG. 34, the neck fan 1′ further includes an electronic control assembly 31′ located between the second portion 1312′ and the main surface 1321′ and electrically connected to the fan blade assembly 21′. The specific installation method between the electronic control assembly 31′ and the outer casing 13′ is not limited here, and designers can make reasonable designs according to actual needs. For example, the electronic control assembly 31′ can be detachably and fixedly connected to the outer casing 13′ through at least one of methods such as screw connections, snap connections, or plug connections. Alternatively, the electronic control assembly 31′ can be non-detachably and fixedly connected to the outer casing 13′ through methods such as riveting or gluing. The electronic control assembly 31′ includes a circuit board and a controller disposed on the circuit board. The motor of the fan blade assembly 21′ is electrically connected to the controller through the circuit board.

[0174]Certainly, the neck fan 1′ further includes a trigger 50′ disposed on the outer casing 13′ and electrically connected to the circuit board. As shown in FIG. 1, the trigger 50′ includes a button 51′. Users can press the button 51′ to turn on or off the motor, and they can adjust the rotational speed of the motor by pressing the button 51′ to achieve multi-gear adjustment of the air volume of the neck fan 1′.

[0175]As shown in FIG. 38, the trigger 50′ includes a first knob 52′. Users can turn the first knob 52′ to turn on or off the motor, and they can further adjust the rotational speed of the motor by turning the first knob 52′ to achieve multi-gear adjustment of the air volume of the neck fan 1′.

[0176]As shown in FIG. 39, the trigger 50′ includes a second knob 53′. Users can turn the second knob 53′ to turn on or off the motor, and they can further adjust the rotational speed of the motor by turning the second knob 53′ to achieve multi-gear adjustment of the air volume of the neck fan 1′.

[0177]Furthermore, as shown in FIGS. 34 to 35, the first mounting chamber and the first recessed surface are respectively located on both sides of the first main body portion along the first direction. The output shaft of the first motor is arranged along the first direction. The turbine fan blade is configured to direct the air from at least one side of the first main body portion along the first direction towards the first recessed surface. Subsequently, the external air duct formed by the first recessed surface directs the air towards one side of the first main body portion and the end away from the turbine fan blade. It can be understood that compared to an internal air duct, an external air duct is advantageous in reducing wind resistance and wind power loss, resulting in better air blowing effects.

[0178]One or more implementation modes are provided above in combination with specific contents, and it is not deemed that the specific implementation of the present disclosure is limited to these specifications. Any technical deductions or replacements approximate or similar to the method and structure of the present disclosure or made under the concept of the present disclosure shall fall within the scope of protection of the present disclosure.