ROTARY CHAIR

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]This application claims priority to Chinese Patent Application 202423318010.8, filed on Dec. 31, 2024, which is incorporated herein by reference.

TECHNICAL FIELD

[0002] This application discloses a rotary chair, and relates to the technical field of household or leisure products.

BACKGROUND

[0003] At present, rotary chairs on the market are divided into office rotary chairs and outdoor leisure rotary chairs. Most of outdoor rotary chairs have detachable seat surfaces, in a case that the fabric surface is lost and there is no spare seat surface, the user experience is unsatisfactory. In addition, some non-detachable rotary chairs are relatively large in size, inconvenient to carry, and high in production cost.

SUMMARY

[0004] In view of the deficiencies of the prior art, this application provides a rotary chair. The rotary chair rotates stably, has a small folded volume and is convenient to carry.

[0005] To achieve the above objective, this application is implemented through the following technical solution.

[0006] A rotary chair, including an upper rotating assembly and a matched lower supporting assembly, where the upper rotating assembly includes a seat-back connector and at least three seat tubes connected thereto, the lower supporting assembly includes a leg tube connector and at least three leg tubes connected thereto, the seat-back connector and the leg tube connector are coaxially connected, an upper rotating member and a lower rotating member are disposed between the seat-back connector and the leg tube connector, where the upper rotating member is connected to the seat-back connector, the lower rotating member is connected to the leg tube connector, and the upper rotating member and the lower rotating member rotate relative to each other directly through surface contact or via rolling bodies.

[0007] Further, the upper rotating member and the seat-back connector are integrally connected by die-casting, the lower rotating member and the leg tube connector are integrally connected by die-casting, through holes are formed in centers of the seat-back connector and the leg tube connector, a coaxial connector is disposed in the through holes, and a thrust bearing is provided at one end of the coaxial connector and at a matching portion with the seat-back connector improve rotational stability.

[0008] Further, the upper rotating member and the lower rotating member each include a rotating disc and a centrally extending rotating sleeve, through holes are formed in centers of the rotating sleeve and the rotating disc, the rotating sleeve is inserted into and fixed in the through hole of the seat-back connector or of the leg tube connector, and the coaxial connector passes through the through holes in the centers of the rotating sleeve and the rotating disc. The coaxial connector is composed of a butt-joint bolt and a matched butt-joint nut, one end of the butt-joint nut is formed with internal threads, and the butt-joint bolt is provided with external threads and is screwed into an inner hole of the butt-joint nut.

[0009] Further, the upper rotating member and the lower rotating member are both annular bodies, matching surfaces of the two annular bodies are matched with annular limiting grooves, a plurality of balls are disposed in the limiting grooves, and the balls are located away from the center and close to the protruding periphery of the leg tube connector. The coaxial connector is composed of a bolt and a corresponding nut, a counterbore is formed in the bottom of the leg tube connector, the nut is located in the counterbore when tightened, and a bottom cap is disposed at the bottom of the leg tube connector to seal the counterbore.

[0010] Further, the seat-back connector is provided with a mounting position for connecting with the seat tube, one end of the seat tube is hinged to the seat-back connector, and a stopping portion is disposed at the mounting position of the seat-back connector to limit an unfolding angle of the seat tube.

[0011] Further, the leg tube connector is provided with mounting positions to which the leg tubes are hinged, each of the leg tubes is provided with a spring pin structure, positioning grooves are formed in side walls of the leg tube connector, and when the leg tubes are unfolded, heads of the spring pin structures slide into the positioning grooves. Each of the spring pin structures includes a fixed pin and a matched spring, the spring and the fixed pin are disposed in the leg tube, an opening is formed in a side wall of each leg tube, a pin head of the fixed pin passes through the opening of the side wall to form a limiting point, and the fixed pin extends or retracts under the action of the spring and is matched with the positioning groove of the leg tube connector to form a limiting structure.

[0012] Further, the leg tubes are four arc-shaped structural tubes, lower end openings of the four leg tubes are matched with tube plugs, and outer sides of lower ends of the leg tubes are riveted with leg pads. A number of the seat tubes is four, all the four seat tubes are telescopic tubes, two of the four seat tubes are front seat tubes and the other two thereof are rear seat tubes, when the seat tubes are extended, lengths of the rear seat tubes are greater than lengths of the front seat tubes, one ends of the seat tubes are hinged to the mounting positions of the seat-back connector, and the other ends of the seat tubes are connected to corresponding ends of a seat surface, and when folded, the seat surface flips over to wrap a chair frame. Each of the front seat tubes includes a lower branch tube and an upper branch tube that slides relative to the lower branch tube, when the upper branch tube slides in the lower branch tube and extends to a maximum degree, the upper branch tube is limited and fixed by a positioning pin or by riveting, a tube inner sleeve is disposed at a tube opening of the lower branch tube, protective sheets are disposed at side walls of the tube opening of the upper branch tube so that relative sliding between the upper branch tube and the lower branch tube is smoother, and an upper end of the upper branch tube is connected to and supports the seat surface. Each of the rear seat tubes includes a lower back tube, a middle back tube, and an upper back tube, the upper back tube slidingly extends and retracts in the middle back tube, the middle back tube slidingly extends and retracts in the lower back tube, when adjacent back tubes extend to a maximum degree, the back tubes are riveted and fixed by positioning pins, the back tubes are limited and fixed by spring pins, tube inner sleeves are disposed at both an upper tube opening of the lower back tube and an upper tube opening of the middle back tube, protective sheets are disposed at both a bottom side surface of the upper back tube and a bottom side surface of the middle back tube, a bottom end of the lower back tube is hinged to the seat-back connector, and an upper part of the upper back tube is connected to and supports the seat surface.

[0013] The rotary chair of this application achieves relative rotation through the upper rotating member and the lower rotating member of the upper rotating assembly and the lower supporting assembly, and is simple in structure and rotates stably. The rotary chair of this application has the fixed seat surface, the seat surface can be folded and flipped over to wrap the chair frame, and the rotary chair has a small folded volume, is easy to carry, and has a high space utilization rate and low production cost.

BRIEF DESCRIPTION OF DRAWINGS

[0014]FIG. 1 is a schematic diagram of an unfolded state according to an embodiment of this application.

[0015]FIG. 2 is another schematic diagram of the unfolded state according to an embodiment of this application.

[0016]FIG. 3 is a schematic diagram of a folded state according to an embodiment of this application.

[0017]FIG. 4 is a sectional view according to an embodiment of this application.

[0018]FIG. 5 is an enlarged view of a part M in FIG. 4.

[0019]FIG. 6 is a sectional view according to another embodiment of this application.

[0020]FIG. 7 is a schematic diagram of a seat-back connector according to this application.

[0021]FIG. 8 is a schematic diagram of a leg tube connector according to this application.

[0022]FIG. 9 is a schematic diagram of a protective sheet according to this application.

[0023]FIG. 10 is a schematic diagram of a tube inner sleeve according to this application.

[0024]FIG. 11 is schematic diagram of another embodiment of a protective sheet according to this application.

DESCRIPTION OF EMBODIMENTS

[0025] This application is further described below with reference to the accompanying drawings.

[0026]Embodiment: with reference to FIGS. 1-10, this application discloses a rotary chair, including an upper rotating assembly and a matched lower supporting assembly, where the upper rotating assembly includes a seat-back connector 1 and at least three seat tubes 16 connected thereto, the lower supporting assembly includes a leg tube connector 2 and at least three leg tubes 3 connected thereto, the seat-back connector 1 and the leg tube connector 2 are coaxially connected, an upper rotating member 4 and a lower rotating member 5 are disposed between the seat-back connector 1 and the leg tube connector 2, where the upper rotating member 4 is connected to the seat-back connector 1, for example, the upper rotating member and the seat-back connector may be integrally formed by die-casting, or may be connected and fixed by other connection ways, the lower rotating member and the leg tube connector may be integrally formed by die-casting or connected and fixed by other connection ways, the lower rotating member 5 is connected to the leg tube connector 2, and the upper rotating member 4 and the lower rotating member 5 rotate relative to each other directly through surface contact or via rolling bodies A matching end of the leg tube connector 2 and the seat-back connector 1 of the rotary chair has a protruding periphery 21, a middle of the matching end is inwardly concaved 22, for example, an annular groove is formed in a peripheral side of the seat-back connector 1 and corresponds to the periphery of the leg tube connector 2, the periphery of the leg tube connector 2 is matched with the seat-back connector 1 to form an accommodating cavity, and the upper rotating member 4 and the lower rotating member 5 are located in the accommodating cavity.

[0027]With reference to FIGS. 1-5, in an embodiment of this application, through holes are formed in centers of the seat-back connector 1 and the leg tube connector 2 respectively, a coaxial connector is disposed in the through holes, and a thrust bearing 7 is provided at one end of the coaxial connector and at a matching portion with the seat-back connector 1, so as to improve rotational stability. As shown in FIG. 5, a rotary matching structure of this application is as follows: the upper rotating member 4 and the lower rotating member 5 adopt a surface contact mode, the two rotating members each include a rotating disc and a centrally extending rotating sleeve, through holes are formed in centers of the rotating sleeve and the rotating disc, the rotating sleeve is inserted into and fixed in the through hole of the seat-back connector 1 or of the leg tube connector 2, and the coaxial connector passes through the through holes in the centers of the rotating sleeve and the rotating disc. A limiting portion is disposed on a peripheral side of the rotating sleeve and is matched with and fixed to the corresponding seat-back connector or leg tube connector, and the limiting portion may be a tooth-shaped or other protrusion design. As shown in FIG. 5, the center through hole of the seat-back connector 1 forms a hole post 101 extending outward, an outer annular post tube 102 is disposed on the peripheral side of the hole post 101, a top end of the outer annular post tube 102 is higher than a top end of the hole post 101, the thrust bearing 7 is disposed at the top end of the hole post 101 and located in the outer annular post tube 102, and a cap 8 is disposed at the top end of the outer annular post tube 102. The coaxial connector used in this embodiment is composed of a butt-joint bolt 9 and a matched butt-joint nut 10, one end of the butt-joint nut 10 is formed with internal threads, and the butt-joint bolt 9 is provided with external threads and is screwed into an inner hole of the butt-joint nut 10. The butt-joint bolt 9 is located in a recessed hole in a bottom of the leg tube connector 2, and a bottom cap 11 is disposed at a hole opening.

[0028]As shown in FIG. 6, in an embodiment of this application, another rotary matching structure is as follows: the matching end of the leg tube connector 2 and the seat-back connector 1 protrudes around its periphery, and the middle of the matching end is inwardly concaved to accommodate a protruding end of the seat-back connector 1 for butt jointing. The upper rotating member 4 and the lower rotating member 5 are both annular bodies, matching surfaces of the two annular bodies are matched with annular limiting grooves, a plurality of balls 6 are disposed in the limiting grooves, and the balls 6 are located away from the center and close to the protruding periphery of the leg tube connector 2. The coaxial connector is composed of a bolt 13 and a corresponding nut 14, a counterbore is formed in the bottom of the leg tube connector 2, the nut is located in the counterbore when tightened, and the bottom cap 11 is disposed at the bottom of the leg tube connector 2 to seal the counterbore.

[0029]With reference to FIGS. 1, 2, and 7, in an embodiment of this application, the seat-back connector 1 is provided with a mounting position 103 for connecting with the seat tube, one end of the seat tube is hinged to the seat-back connector 1, and a stopping portion is disposed at the mounting position of the seat-back connector to limit an unfolding angle of the seat tube.

[0030]With reference to FIGS. 1-6 and 8, in an embodiment of this application, the leg tube connector 2 is provided with mounting positions 201 to which the leg tubes 3 are hinged, each of the leg tubes 3 is provided with a spring pin structure, positioning grooves 202 are formed in side walls of the leg tube connector 2, and when the leg tubes are unfolded, heads of the spring pin structures slide into the positioning grooves. Each of the spring pin structures includes a fixed pin and a matched spring 15, the spring 15 and the fixed pin are disposed in the leg tube 3, an opening is formed in a side wall of each leg tube 3, a pin head of the fixed pin passes through the opening of the side wall to form a limiting point, and the fixed pin extends or retracts under the action of the spring 15 and is matched with the positioning groove 202 of the leg tube connector 2 to form a limiting structure. Recesses 203 are formed between adjacent mounting positions to which the leg tubes are hinged, to accommodate the folded seat tubes.

[0031]With reference to FIGS. 1-3, in an embodiment of this application, the leg tubes 3 are four arc-shaped structural tubes, lower end openings of the four leg tubes are matched with tube plugs 31, and outer sides of lower ends of the leg tubes are riveted with leg pads 32. A number of the seat tubes 16 is four, all the four seat tubes are telescopic tubes, two of the four seat tubes are front seat tubes 161 and the other two thereof are rear seat tubes 162, when the seat tubes are extended, lengths of the rear seat tubes are greater than lengths of the front seat tubes, one ends of the seat tubes are hinged to the mounting positions of the seat-back connector, and the other ends of the seat tubes are connected to corresponding ends of a seat surface, and when folded, the seat surface flips over to wrap a chair frame. Each of the front seat tubes 161 includes a lower branch tube 1611 and an upper branch tube 1612 that slides relative to the lower branch tube, when the upper branch tube 1612 slides in the lower branch tube 1611 and extends to a maximum degree, the upper branch tube is limited and fixed by a positioning pin or a spring pin, a tube inner sleeve 17 is disposed at a tube opening of the lower branch tube 1611, protective sheets 18 are disposed at side walls of the tube opening of the upper branch tube 1612 so that relative sliding between the upper branch tube and the lower branch tube is smoother, and an upper end of the upper branch tube 1612 is connected to and supports the seat surface. As shown in FIG. 10, the tube inner sleeve 17 is provided with fasteners 171 on both sides correspondingly, clamping holes are formed in side walls of the tube opening of the lower branch tube 1611, and after assembly, the fasteners 171 are disposed at the clamping holes as shown in FIG. 2, and the tube inner sleeve 17 is mounted at the tube opening of the lower branch tube 1611 through the fasteners and the clamping holes. As shown in FIGS. 4 and 9, mounting holes are formed in side walls, close to the end opening, of the upper branch tube 1612, the protective sheets 18 are U-shaped and symmetrically arranged, and a protrusion 181 is provided on an inner side of each of the protective sheets 18 and is matched with the mounting hole. FIG. 11 is schematic diagram of another embodiment of a protective sheet according to this application. A structure of FIG. 11 is that a middle part of the protective sheet is extended towards one end based on that in FIG. 9. Each of the rear seat tubes 162 includes a lower back tube 1621, a middle back tube 1622, and an upper back tube 1623, the upper back tube 1623 slidingly extends and retracts in the middle back tube 1622, the middle back tube 1622 slidingly extends and retracts in the lower back tube 1621, when adjacent back tubes extend to a maximum degree, the back tubes are limited and fixed by positioning pins or spring pins, tube inner sleeves are disposed at both an upper tube opening of the lower back tube 1621 and an upper tube opening of the middle back tube 1622, protective sheets are disposed at both a bottom side surface of the upper back tube 1623 and a bottom side surface of the middle back tube 1622, a bottom end of the lower back tube 1621 is hinged to the seat-back connector 1, and an upper part of the upper back tube 1623 is connected to and supports the seat surface.

[0032]In an embodiment of this application, a rotary chair includes four leg pads 32, four leg tubes 3, four seat tubes 16 (namely, two front seat tubes and two rear seat tubes), six square tube inner sleeves or tube inner sleeves 17, six pairs of protective sheets 18, twelve square tube plugs, one seat-back connector 1, one leg tube connector 2, one cap, and two rotating members. In this application, inner sides of lower ends of the four leg tubes are matched with the tube plugs, and outer sides of the lower ends of the leg tubes are riveted with the leg pads; upper ends of the leg tubes 3 are riveted with the leg tube connector 2; four fixed pins are matched with four compression springs to form spring pin structures, and assemblies are matched with the leg tubes and positioning grooves 202 of and the leg tube connector 2; the leg tube connector 2 is matched with the lower rotating member 5; the lower rotating member 5 is matched with the upper rotating member through a butt-joint nut and a butt-joint bolt; the thrust bearing 7 is matched with the butt-joint nut; the seat-back connector 1 is matched with the upper rotating member 4; the cap 8 is matched with the seat-back connector 1; the four seat tubes are respectively riveted to the seat-back connector 1 to form hinged rotation; and ends, close to the seat-back connector, of the seat tubes are matched with the tube plugs, and the tube plugs are riveted to the seat-back connector.

[0033] When the frame of the rotary chair of this application is folded, as shown in FIG. 3, the seat tubes of the rotary chair are fixed to the seat surface or seat fabric, and the chair frame can be folded and wrapped, resulting in a high space utilization.

[0034] The above descriptions are merely embodiments with the use of the technical content of this creation, and any modifications or changes made by those familiar with the art using this creation fall within the patent scope claimed by this creation and are not limited to those disclosed in the embodiments.