AUTOMATICALLY RETRACTABLE MOVABLE SEAT FRAME AND SOFA

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]The present disclosure claims the priority of Chinese Patent Application No. 202421457667X filed on Jun. 25, 2024 before CNIPA. All the above are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

[0002]The present disclosure relates to the technical field of furniture and, particularly, to an automatically retractable movable seat frame and a sofa.

BACKGROUND

[0003]With the improvement of people's living standards, multifunctional sofas have become more widely used in home life. Multifunctional sofas can usually be adjusted to a sitting position for normal sitting, a relaxing position with only the legs extended, and a lying position with both legs and back fully extended. The multifunctional sofas currently on the market can be divided into electric and manual types according to their driving methods. Among them, the cost of electric multifunctional sofas is relatively high. However, manual multifunctional sofas have obvious defects: it is more laborious to retract the leg mechanism, which leads to a poor user experience.

SUMMARY

[0004]In order to overcome at least one defects mentioned in the prior art, provided in the present disclosure is an automatically retractable movable seat frame, which automatically retracts the leg mechanism, thereby improving the user experience.

[0005]An automatically retractable movable seat frame includes at least one stretching device. The stretching device includes: a linkage mechanism, including a driving elastic member, a rotating rack, and a linkage rack, the driving elastic member being assembled between the rotating rack and the linkage rack; a leg mechanism, hinged to a front end of the linkage rack, a drag link being hinged between the rotating rack and the leg mechanism; a seat mechanism, hinged to a rear end of the leg mechanism; and a rotating mechanism, connected to the rotating rack, configured to drive the rotating rack to rotate, so that the stretching device is switched between a sitting position and a relaxing position, in which the driving elastic member stretches and retracts with the rotation of the rotating rack, and the driving elastic member drives the rotating rack to rotate when the rotating rack is rotated to a preset position, so that the leg mechanism is folded.

[0006]In the present automatically retractable movable seat frame, the driving elastic member stretches and retracts with the rotation of the rotating rack, and the driving elastic member drives the rotating rack to rotate when the rotating rack is rotated to a preset position, so as to achieve the automatic folding of the leg mechanism, which improves the user experience.

[0007]According to some embodiments of the present disclosure, the leg mechanism includes a first front link, a second front link, a leg mounting rack, a third front link, and a fourth front link; an end of the first front link is hinged to a front end of the seat mechanism, the second front link is hinged between the leg mounting rack and an opposite end of the first front link, the third front link is hinged between the leg mounting rack and an end of the fourth front link, an opposite end of the fourth front link is hinged to a front end of the linkage rack, the drag link is hinged to a middle of the fourth front link, and the opposite end of the fourth front link extends toward the seat mechanism to form an extension part of the seat mechanism.

[0008]According to some embodiments of the present disclosure, the automatically retractable movable seat frame further includes a front extension mounting rack, and both the second front link and the third front link are hinged to the front extension mounting rack.

[0009]According to some embodiments of the present disclosure, the linkage rack includes a base, a first linkage rod, a second linkage rod, a third linkage rod, and a fourth linkage rod; a front support arm is hinged between the first linkage rod and a front end of the base, a rear support arm is hinged between the first linkage rod and a rear end of the base, the rear support arm is provided with a restricting pin, a front end of the second linkage rod is hinged to the fourth front link, a rear end of the second linkage rod is hinged to an end of the third linkage rod, an opposite end of the third linkage rod is hinged to the first linkage rod by the fourth linkage rod, and the fourth linkage rod is provided with a restricting groove snap-fitted with the restricting pin; and the restricting pin is separated from the restricting groove when an angle between the leg mounting rack in the present position and the leg mounting rack in the sitting position is less than or equal to 40°, and the driving elastic member drives the rotating rack to rotate, so that the leg mechanism is folded.

[0010]According to some embodiments of the present disclosure, the seat mechanism includes a seat mounting rack, hinged to a rear end of the first front link, and the extension part of the fourth front link is hinged to the seat mounting rack.

[0011]According to some embodiments of the present disclosure, the automatically retractable movable seat frame further includes a backrest mechanism, in which the backrest mechanism includes a backrest mounting rack, a first rear link, and a second rear link, a front end of the backrest mounting rack is hinged to a rear end of the seat mounting rack, both an end of the first rear link and an end of the second rear link are sequentially hinged to the backrest mounting rack in a direction distal to the seat mechanism, an opposite end of the first rear link is provided with a movable long groove, a sliding pin slides with respect to the movable long groove, and both an opposite end of the second rear link and a rear end of the second linkage rod are hinged to the sliding pin.

[0012]According to some embodiments of the present disclosure, the automatically retractable movable seat frame further includes a seat link, hinged between a front end of the backrest mounting rack and a front end of the first linkage rod, and a middle of the seat link is hinged to a middle of the seat mounting rack.

[0013]According to some embodiments of the present disclosure, the driving elastic member includes at least one driving spring, and the driving spring is assembled between the rotating rack and the linkage rack.

[0014]According to some embodiments of the present disclosure, the rotating mechanism includes a rotating link, and the rotating link is fixedly connected to the rotating rack.

[0015]Provided in the present disclosure is further a sofa, including the aforementioned automatically retractable movable seat frame.

[0016]In summary, the automatically retractable movable seat frame provided in the present disclosure has the following technical effects:

[0017]The driving elastic member stretches and retracts with the rotation of the rotating rack, and the driving elastic member drives the rotating rack to rotate when the rotating rack is rotated to a preset position, so as to achieve the automatic folding of the leg mechanism, which improves the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]FIG. 1 is a schematic structural diagram of the automatically retractable movable seat frame of an embodiment of the present disclosure in the sitting position;

[0019]FIG. 2 is another schematic structural diagram of the automatically retractable movable seat frame of the embodiment of the present disclosure in the sitting position;

[0020]FIG. 3 is a schematic structural diagram of the automatically retractable movable seat frame of the embodiment of the present disclosure in the critical position;

[0021]FIG. 4 is another schematic structural diagram of the automatically retractable movable seat frame of the embodiment of the present disclosure in the critical position;

[0022]FIG. 5 is a schematic structural diagram of the linkage rack of the embodiment of the present disclosure in the critical position;

[0023]FIG. 6 is a schematic structural diagram of the automatically retractable movable seat frame of the embodiment of the present disclosure in the relaxing position; and

[0024]FIG. 7 is a schematic structural diagram of the automatically retractable movable seat frame of the embodiment of the present disclosure in the lying position.

[0025]The meanings of the reference numerals are as follows:

[0026]1 linkage mechanism; 11 driving elastic member; 12 rotating rack; 13 linkage rack; 131 base; 132 first linkage rod; 133 second linkage rod; 134 third linkage rod; 135 fourth linkage rod; 1351 restricting groove; 136 front support arm; 137 rear support arm; 1371 restricting pin; 14 drag link; 2 leg mechanism; 21 first front link; 22 second front link; 23 leg mounting rack; 24 third front link; 25 fourth front link; 26 extension part; 27 front extension mounting rack; 3 seat mechanism; 31 seat mounting rack; 32 seat link; 4 rotating mechanism; 41 rotating link; 5 backrest mechanism; 51 backrest mounting rack; 52 first rear link; 521 movable long groove; and 53 second rear link.

DETAILED DESCRIPTION

[0027]For a better understanding and implementation, the technical solutions in the embodiments of the present disclosure are clearly and completely described below in conjunction with the attached drawings of the present disclosure.

[0028]In the description of the present disclosure, it is to be noted that the terms “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside” and other orientation or position relationships are based on the orientation or position relationships shown in the attached drawings. It is only intended to facilitate description of the present disclosure and simplify description, but not to indicate or imply that the referred device or element has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as a limitation of the present disclosure.

[0029]Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are used only to describe specific embodiments and are not intended as a limitation of the disclosure.

[0030]Referring to FIGS. 1-7, disclosed is an automatically retractable movable seat frame. The automatically retractable movable seat frame includes at least one stretching device. The stretching device includes a linkage mechanism 1, a leg mechanism 2, a seat mechanism 3, and a rotating mechanism 4. In some implementations, The linkage mechanism 1 includes a driving elastic member 11, a rotating rack 12, and a linkage rack 13, and the driving elastic member 11 is assembled between the rotating rack 12 and the linkage rack 13. The leg mechanism 2 is hinged to a front end of the linkage rack 13, and a drag link 14 is hinged between the rotating rack 12 and the leg mechanism 2. The seat mechanism 3 is hinged to a rear end of the leg mechanism 2. The rotating mechanism 4 is connected to the rotating rack 12, configured to drive the rotating rack 12 to rotate, so that the stretching device is switched between a sitting position and a relaxing position. The driving elastic member 11 is capable of stretching and retracting with the rotation of the rotating rack 12, and the driving elastic member 11 drives the rotating rack 12 to rotate when the rotating rack 12 is rotated to a preset position, so that the leg mechanism 2 is folded. In some implementations, the driving elastic member 11 stretches and retracts with the rotation of the rotating rack 12, so that the driving elastic member 11 is capable of driving the rotating rack 12 to rotate when the rotating rack 12 is rotated to a preset position, so as to achieve the automatic folding of the leg mechanism 2, which improves the user experience.

[0031]Referring to FIGS. 1-7, in some implementations, the leg mechanism 2 includes a first front link 21, a second front link 22, a leg mounting rack 23, a third front link 24, and a fourth front link 25. An end of the first front link 21 is hinged to a front end of the seat mechanism 3, the second front link 22 is hinged between the leg mounting rack 23 and an opposite end of the first front link 21, the third front link 24 is hinged between the leg mounting rack 23 and an end of the fourth front link 25 an opposite end of the fourth front link 25 is hinged to a front end of the linkage rack 13, the drag link 14 is hinged to a middle of the fourth front link 25, and the opposite end of the fourth front link 25 extends toward the seat mechanism 3 to form an extension part 26 of the seat mechanism 3. In some implementations, a corresponding footrest pad may be mounted on the leg mounting rack 23. For ease of description, in the present disclosure, it is defined that the stretching device is switched from a sitting position to a relaxing position when the rotating rack 12 is rotated clockwise, and the stretching device is switched from the relaxing position to the sitting position when the rotating rack 12 is rotated counterclockwise. In some implementations, upon switching from the sitting position to the relaxing position, the rotating mechanism 4 drives the rotating rack 12 to rotate clockwise, the rotating rack 12 drives the fourth front link 25 to rotate upward by the drag link 14, the third front link 24 extends forward driven by the fourth front link 25 and drives the first front link 21 to rotate upward, and the second front link 22 extends forward driven by the first front link 21 to drive the leg mounting rack 23 to be flipped upward and drive the corresponding footrest pad to be flipped upward. Furthermore, as the rotating rack 12 is rotated clockwise, the rotating rack 12 drives the driving elastic member 11 to stretch and retract, so that the driving elastic member 11 can provide a force in a direction of stretching and retraction to the rotating rack 12. The force in a direction of extension and retraction to the rotating rack 12 provided by the driving elastic member 11 can pull the rotating rack 12 to rotate counterclockwise when the rotating mechanism 4 drives the rotating rack 12 to rotate to a preset position, the rotating rack 12 drives the fourth front link 25 to rotate downward by the drag link 14, the third front link 24 is folded backward driven by the fourth front link 25 and drives the first front link 21 to rotate downward, the second front link 22 is folded backward driven by the first front link 21, so that both the leg mounting rack 23 and the front extension mounting rack 27 are rotated downward, so as to achieve the automatic folding of the leg mechanism 2, which improves the user experience.

[0032]Referring to FIG. 3, in some implementations, the driving elastic member 11 includes at least one driving spring, and the driving spring is assembled between the rotating rack 12 and the linkage rack 13. In some implementations, a first mounting pin is mounted between the rotating rack 12 and an end of the driving spring, a second mounting pin is mounted between the linkage rack and an opposite end of the driving spring. In some implementations, the rotating rack 12 is capable of driving the driving spring to stretch when the rotating mechanism 4 rotates the rotating rack 12, that is, the rotating rack 12 drives the driving spring to be elastically deformed, so that the driving spring can provide a force in a stretching and retraction direction to the rotating rack 12 by the first mounting pin, thereby driving the rotating rack 12 to rotate, so as to achieve the automatic folding of the leg mechanism 2. Further, the preset position may be any one or more corresponding positions between the switch process from the sitting position to the relaxing position of the rotating rack 12.

[0033]Referring to FIGS. 1-7, in some implementations, the automatically retractable movable seat frame further includes a front extension mounting rack 27, and both the second front link 22 and the third front link 24 are hinged to the front extension mounting rack 27. In some implementations, the front extension mounting rack 27 is provided with an extension pad. The rotating mechanism 4 drives the rotating rack 12 to rotate clockwise when it is switched from the sitting position to the relaxing position, the rotating rack 12 drives the fourth front link 25 to rotate upward by the drag link 14, the third front link 24 extends forward driven by the fourth front link 25 and drives the first front link 21 to rotate upward, the second front link 22 extends forward driven by the first front link 21, so that both the leg mounting rack 23 and the front extension mounting rack 27 are flipped upward, both the footrest pad and the extension pad are flipped upward, so that the extension pad is provided between the footrest pad and the seat mechanism 3, thereby extending the length of the leg mechanism 2 and providing longer support for user's legs, which further improves the user experience.

[0034]Referring to FIGS. 1-7, in some implementations, the linkage rack 13 includes a base 131, a first linkage rod 132, a second linkage rod 133, a third linkage rod 134, and a fourth linkage rod 135. A front support arm 136 is hinged between the first linkage rod 132 and a front end of the base 131, a rear support arm 137 is hinged between the first linkage rod 132 and a rear end of the base 131, the rear support arm 137 is provided with a restricting pin 1371, a front end of the second linkage rod 133 is hinged to the fourth front link 25, a rear end of the second linkage rod 133 is hinged to an end of the third linkage rod 134, an opposite end of the third linkage rod 134 is hinged to the first linkage rod 132 by the fourth linkage rod 135, and the fourth linkage rod 135 is provided with a restricting groove 1351 snap-fitted with the restricting pin 1371. The restricting pin 1371 is separated from the restricting groove 1351 when an angle between the leg mounting rack 23 in the present position and the leg mounting rack 23 in the sitting position is less than or equal to 40°, and the driving elastic member 11 is capable of driving the rotating rack 12 to rotate, so that the leg mechanism 2 is folded. In some implementations, the leg mounting rack 23 is flipped over driven by the rotating rack 12 and the corresponding links when the leg mounting rack 23 is retracted backwards or unfolded forwards. The driving elastic member 11 can pull the rotating rack 12 to rotate counterclockwise by itself when an angle between the current position of the leg mounting rack 23 and the sitting position of the leg mounting rack 23 is less than or equal to 40°, so as to automatically retract the leg mechanism 2. That is, the corresponding rotating rack 12 is in a preset position when the angle between the current position of the leg mounting rack 23 and the sitting position of the leg mounting rack 23 is less than or equal to 40°. Specifically, referring to FIG. 3, the angle a in FIG. 3 is the angle between the current position of the leg mounting rack 23 and the sitting position of the leg mounting rack 23, the automatically retractable movable seat frame is in a critical position when the angle a is equal to 40°, and the driving elastic member 11 can pull the rotating rack 12 to rotate counterclockwise by itself, so as to achieve the automatic folding of the leg mechanism 2. Further, the angle a can be adjusted according to actual needs, so the above angles can be less than or equal to such as 30°, 35°, 50°, and 60°.

[0035]Further, the restricting pin 1371 is snap-fitted with the restricting groove 1351 when an angle between the leg mounting rack 23 in the present position and the leg mounting rack 23 in the sitting position is greater than 40°. Specifically, during the forward unfolding of the leg mounting rack 23, the rotating mechanism 4 drives the rotating rack 12 to rotate clockwise and drives the second linkage rod 133 to move forward driven by both the fourth front link 25 and the driving elastic member 11, so as to drive the second linkage rod 133 to pull the fourth linkage rod 135 to rotate by the third linkage rod 134. The restricting pin 1371 is snap-fitted in the restricting groove 1351 when the angle between the current position of the leg mounting rack 23 and the sitting position of the leg mounting rack 23 is greater than 40°, so that the force provided by the driving elastic member 11 to the rotating rack 12 is unable to drive the rotating rack 12 to rotate. Referring to FIGS. 6 and 7, with the rotation of the rotating rack 12, the force provided by the driving elastic member 11 to the rotating rack 12 at this time is able to prevent the counterclockwise rotation of the rotating rack 12, so that the leg mounting rack 23 can be reliably stayed in the corresponding position, so as to provide a sufficiently large support force of the leg mounting rack 23 to support the legs of the user.

[0036]Referring to FIGS. 2-7, in some implementations, the seat mechanism 3 includes a seat mounting rack 31, the seat mounting rack 31 is hinged to a rear end of the first front link 21, and the extension part 26 of the fourth front link 25 is hinged to the seat mounting rack 31. In some implementations, the seat mounting rack 31 may be mounted with a seat pad. In some implementations, the seat mounting rack 31 is located above the linkage rack 13. In some implementations, both the leg mounting rack 23 and the front extension mounting rack 27 can be flipped upward or downward driven by the rotating rack 12 when the stretching device is switched between the sitting position and the relaxing position, so as to adjust a slope between the footrest pad, extension pad, and the seat pad, thereby providing the user with a comfortable sitting position.

[0037]Referring to FIGS. 2-7, in some implementations, the automatically retractable movable seat frame further includes a backrest mechanism 5, in which the backrest mechanism 5 includes a backrest mounting rack 51, a first rear link 52, and a second rear link 53, a front end of the backrest mounting rack 51 is hinged to a rear end of the seat mounting rack 31, both an end of the first rear link 52 and an end of the second rear link 53 are sequentially hinged to the backrest mounting rack 51 in a direction distal to the seat mechanism 3, an opposite end of the first rear link 52 is provided with a movable long groove 521, a sliding pin slides with respect to the movable long groove 521, and both an opposite end of the second rear link 53 and a rear end of the second linkage rod 133 are hinged to the sliding pin. In some implementations, the backrest mounting rack 51 is mounted with a backrest pad. Specifically, the second linkage rod 133, driven by both the fourth front link 25 and the driving elastic member 11, drives the sliding pin to slide along the movable long groove 521 when the stretching device is switched from the sitting position to the relaxing position, so as to achieve that the backrest mounting rack 51 remains unchanged when the stretching device is switched from the sitting position to the relaxing position. Further, the second linkage rod 133 drives the first rear link 52 to rotate by the sliding pin when the stretching device is switched between the relaxing position and the lying position, so as to drive the backrest mounting rack 51 to rotate backward or forward about the hinge point between the backrest mounting rack 51 and the second rear link 53, which achieves the position adjustment of the backrest mounting rack 51.

[0038]Specifically, the rotating mechanism 4 drives the rotating rack 12 to rotate clockwise when it is switched from the sitting position to the relaxing position, and the rotating rack 12 drives the fourth front link 25 to rotate upward about the hinge point between the fourth front link 25 and the seat mounting rack by the drag link 14. The third front link 24 extends forward driven by the fourth front link 25 and drives the first front link 21 to rotate upward about the hinge point between the first front link 21 and the seat mounting rack 31, and the second front link 22 extends forward driven by the first front link 21, so that both the leg mounting rack 23 and the front extension mounting rack 27 are flipped upward. Thus, the corresponding footrest pad and the extension pad are flipped upward, and the second linkage rod 133, driven by the fourth front link 25, drives the sliding pin to slide along the movable long groove 521, that is, the backrest mounting rack 51 remains unchanged when the footrest pad is flipped upward. The rotating mechanism 4 drives the rotating rack 12 to rotate clockwise when it is switched from the relaxing position to the lying position, the rotating rack 12 drives the leg mechanism 2 to move forward by the drag link 14 and pull the second linkage rod 133 to move forward, so that the second linkage rod 133 drives the first rear link 52 to rotate by the sliding pin, and the backrest mounting rack 51 is driven to rotate backward about the hinge point between the backrest mounting rack 51 and the second rear link 53, so as to achieve the transformation from a chair to a bed.

[0039]Referring to FIGS. 4 and 7, in some implementations, the automatically retractable movable seat frame further includes a seat link 32, the seat link 32 is hinged between a front end of the backrest mounting rack 51 and a front end of the first linkage rod 132, and a middle of the seat link 32 is hinged to a middle of the seat mounting rack 31. Specifically, the seat link 32 is driven by the backrest mounting rack 51 to rotate upward about the hinge point between the seat link 32 and the first linkage rod 132, so that the seat mounting rack 31 is lifted upward during the rotation of the seat link 32 and the backrest mounting rack 51, which leads to a reduction in a height difference between the footrest pad, the seat pad, and the backrest pad, providing a better user experience.

[0040]Referring to FIGS. 1-4, in some implementations, the rotating mechanism 4 includes a rotating link 41, and the rotating link 41 is fixedly connected to the rotating rack 12. In some implementations, the rotating link 41 may be externally connected with a device such as a handle, whereby the user can manually rotate the rotating link 41 by means of a device such as a handle, so as to rotate the rotating rack 12 and achieve the switching of the stretching device between the sitting position, the relaxing position, and the lying position. Further, in order to improve the structural strength and the stability of the automatically retractable movable seat frame, there may be provided with two stretching devices, two stretching devices are arranged in parallel, and two ends of one of the rotating links 41 pass through the seat mounting rack 31 respectively to be fixedly connected to the corresponding rotating rack 12, so that two stretching devices can perform position switching synchronously. In some implementations, the driving elastic member may be provided in any one of the stretching devices. The driving elastic member drives the rotating rack 12 on the stretching device when the leg mechanism 2 is automatically folded, at which the rotating rack 12 drives the rotating rack 12 on the other stretching device through the rotating link 41.

[0041]Provided in the present disclosure is further a sofa, including the aforementioned automatically retractable movable seat frame. Specifically, the automatically retractable movable seat frame forms the main frame of the sofa, and therefore, the switch between positions of the stretching mechanism corresponds to the switch between positions of the sofa.

[0042]The technical means disclosed in the solution of the present disclosure are not limited to those disclosed in the embodiments mentioned above but also include technical solutions consisting of any combination of the above technical features. It should be noted that for those skilled in the art, a plurality of improvements and modifications may be made without departing from the principles of the present disclosure. These improvements and modifications are also considered to be within the scope of protection of the present disclosure.