Backrest and seat

Abstract

The utility model relates to the technical field of seats, in particular to a backrest and a seat. The backrest comprises a backrest support which is of a hollow structure, the backrest support is provided with a hollow part and a plurality of clamping holes, each clamping hole is located in one side of the backrest support, and the clamping holes are formed in the outer side of the hollow part at intervals; the frame body assembly comprises a frame body, lining cloth and a plurality of buckles, the frame body is located on one side of the backrest support, the buckles are detachably connected with the frame body, the buckles are connected with the clamping holes in a one-to-one correspondence and clamping mode, and the lining cloth is installed on the frame body and covers the frame body so that the lining cloth can cover the hollow-out part. According to the backrest, a user can replace the lining cloth according to needs.

Description

Technical Field

[0001] This application relates to the technical field of seats, and particularly to a backrest and a seat. Background Art

[0002] The seat backrest greatly affects the comfort of use. Generally, a lining cloth is provided on the seat backrest and contacts the user through the lining cloth.

[0003] In the related art, the seat backrest includes a backrest bracket and a lining cloth fixedly installed on the backrest bracket. However, when the lining cloth is damaged, the user cannot replace the lining cloth. Utility Model Content

[0004] Based on this, this application provides a backrest and a seat to solve the problem that the user cannot replace the lining cloth when the lining cloth is damaged in the related art.

[0005] On the one hand, this application provides a backrest, including:

[0006] A backrest bracket, which is a hollow structure. The backrest bracket is provided with a hollowed-out part and a plurality of card holes. Each card hole is located on one side of the backrest bracket, and the plurality of card holes are arranged at intervals outside the hollowed-out part;

[0007] A frame assembly, including a frame, a lining cloth, and a plurality of buckles. The frame is located on one side of the backrest bracket. The plurality of buckles are respectively detachably connected to the frame. The plurality of buckles are respectively snap-fitted with the plurality of card holes in one-to-one correspondence. The lining cloth is installed on the frame and covers the frame, so that the lining cloth covers the hollowed-out part.

[0008] In a possible implementation manner, a plurality of receiving grooves are provided on the side of the frame facing the backrest bracket, and the plurality of receiving grooves respectively receive the plurality of buckles in one-to-one correspondence;

[0009] The buckle includes a first connection section and two second connection sections respectively located on opposite sides of the first connection section. The first connection section is located in the receiving groove, and the end of the second connection section far from the first connection section extends out of the receiving groove and is provided with a hook-shaped part. The part of the buckle located in the receiving groove is detachably connected to the frame.

[0010] In a possible implementation manner, the frame assembly further includes a first fastener. The first fastener penetrates the frame and extends between the two second connection sections. The part of the second connection section located in the receiving groove is detachably connected to the frame, and the second connection section abuts against the first fastener.

[0011] In a possible implementation manner, barbs are respectively provided on the opposite sides of the two second connection sections of the buckle, and the barbs are inserted into the frame.

[0012] In a possible implementation, the extending direction of the barbed portion is inclined to the extending direction of the second connecting section, and the distance between the barbed portion and the second connecting section gradually increases from the bottom to the opening of the receiving groove.

[0013] In a possible implementation, a protrusion is provided on the side wall of the receiving groove, and a limiting hole is provided on the second connecting section, and the protrusion is arranged through the limiting hole.

[0014] In a possible implementation, a fastening hole for the screw of the first fastener to pass through is provided on the first connecting section, and a plurality of protruding portions are provided on the side wall of the fastening hole. The plurality of protruding portions are arranged at intervals around the axis of the fastening hole, and the end portions of the protruding portions extend between adjacent teeth of the screw; and / or,

[0015] Extension portions exceeding the second connecting section are respectively provided on the opposite sides of the first connecting section, and the end portions of the extension portions abut against the side wall of the receiving groove.

[0016] In a possible implementation, an annular groove surrounding the hollow portion is further provided on the backrest bracket, a plurality of card holes are respectively located in the annular groove, and the frame body extends into the annular groove.

[0017] In a possible implementation, a plurality of grooves arranged at intervals are provided on the outer periphery of the frame body, and the lining cloth is fixed to the frame body through a plurality of second fasteners, and the heads of the second fasteners are located in the grooves.

[0018] On the other hand, the present application further provides a seat, and the seat is used for being installed on a mobility scooter or made into a wheelchair;

[0019] The seat includes a seat main body and the above-mentioned backrest, and the backrest bracket of the backrest is connected to the seat main body.

[0020] The backrest and the seat provided by the present application include a backrest bracket and a frame body assembly. A plurality of buckles of the frame body assembly are respectively detachably connected to the frame body. The frame body assembly can be installed on one side of the backrest bracket through the clamping of a plurality of buckles on the frame body and a plurality of card holes on the backrest bracket. Since the lining cloth covers the frame body, the lining cloth also covers the hollow portion of the backrest bracket. When the lining cloth is damaged and needs to be replaced, the lining cloth on the frame body can be cut, and the frame body is separated from the plurality of buckles, and then the frame body can be removed from the backrest bracket. After the frame body is removed, each buckle can be removed from the corresponding card hole respectively to realize the disassembly of the frame body assembly, and the user can install a new frame body assembly on the backrest bracket. Description of the Drawings

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A front view of a backrest provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross section at section line AA;

[0024] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0025] Figure 4 A schematic diagram of the structure of a backrest bracket provided in an embodiment of the present application;

[0026] Figure 5 The explosion of the backrest provided in the embodiment of the present application Figure 1 ;

[0027] Figure 6 The explosion of the backrest provided in the embodiment of the present application Figure 2 ;

[0028] Figure 7 The explosion of the backrest provided in the embodiment of the present application Figure 3 ;

[0029] Figure 8 for Figure 7 A partial enlarged schematic diagram of point B in the middle;

[0030] Figure 9 A schematic diagram of a frame provided in an embodiment of the present application facing the backrest bracket side;

[0031] Figure 10 A schematic diagram of a frame provided in an embodiment of the present application, showing a side facing away from the backrest bracket;

[0032] Figure 11 A front view of a buckle provided in an embodiment of the present application;

[0033] Figure 12 A side view of a buckle provided in an embodiment of the present application;

[0034] Figure 13 A top view of a buckle provided in an embodiment of the present application;

[0035] Figure 14 A schematic diagram of the structure of the buckle provided in the embodiment of the present applicationFigure 1 ;

[0036] Figure 15 Structural schematic of the buckle provided by the embodiment of the present application Figure 2 ;

[0037] Figure 16 is Figure 4 Cross-sectional schematic diagram at the cutting line B-B;

[0038] Figure 17 is Figure 4 Cross-sectional schematic diagram at the cutting line C-C.

[0039] Explanation of reference numerals in the drawings:

[0040] 10 - backrest;

[0041] 100 - backrest bracket; 110 - hollowed-out part; 120 - annular groove; 130 - card hole;

[0042] 200 - frame assembly; 210 - frame; 211 - receiving groove; 212 - receiving part; 213 - groove; 220 - lining cloth; 230 - buckle; 231 - first connecting section; 2311 - extending part; 232 - second connecting section; 233 - barbed part; 234 - hook-shaped part; 235 - fastening hole; 236 - protruding part; 240 - first fastener. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application and should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0044] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0046] The terms "first", "second", "third" (if any) in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0047] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0048] In the prior art, the backrest of a seat includes a backrest bracket and a lining cloth fixedly installed on the backrest bracket. Specifically, the backrest bracket is a hollow structure, and a clamping hole communicating with the internal cavity is provided on one side of the backrest bracket. The lining cloth is installed on a frame body, and a buckle is fixedly installed on the frame body. The frame body and the lining cloth on the frame body are installed on the backrest bracket through the engagement between the buckle and the clamping hole. However, after the buckle and the clamping hole are engaged, they cannot be separated, and when the lining cloth is damaged, the user cannot replace the lining cloth.

[0049] After repeated thinking and verification, the inventor found that if the buckle and the frame body are set to be separable, when the lining cloth needs to be replaced, the user can cut the original old lining cloth and separate the frame body from the buckle, and then the frame body and the lining cloth on the frame body can be removed from the backrest bracket. The user can directly replace the frame body and the lining cloth on the frame body.

[0050] In view of this, the inventor designed a backrest and a seat. The backrest is provided with a plurality of clamping holes on the backrest bracket, a lining cloth is installed on the frame body, and a plurality of buckles are detachably installed on the frame body. The frame body can be installed on the backrest bracket through the cooperation between the buckles and the clamping holes. When the lining cloth needs to be replaced, the frame body can be separated from the buckles, so that the frame body can be removed from the backrest bracket. After the frame body is removed, the buckles on the clamping holes are removed, and the user can replace the new frame body and the lining cloth.

[0051] The following describes in detail the technical solutions of the backrest and the seat provided in the embodiments of the present application with reference to the drawings.

[0052] Refer to Figures 1 - 8As shown in the figure, the backrest 10 provided by the embodiment of the present application includes a backrest bracket 100 and a frame assembly 200. The backrest bracket 100 is a hollow structure. The backrest bracket 100 is provided with a hollowed-out portion 110 and a plurality of card holes 130. Each card hole 130 is located on one side of the backrest bracket 100, and the plurality of card holes 130 are arranged at intervals outside the hollowed-out portion 110. The frame assembly 200 includes a frame 210, a lining cloth 220 and a plurality of buckles 230. The frame 210 is located on one side of the backrest bracket 100. The plurality of buckles 230 are respectively detachably connected to the frame 210, and the plurality of buckles 230 are respectively engaged with the plurality of card holes 130 in a one-to-one correspondence. The lining cloth 220 is installed on the frame 210 and covers the frame 210 so that the lining cloth 220 covers the hollowed-out portion 110.

[0053] Illustratively, the backrest bracket 100 can be made of carbon steel material. After the backrest bracket 100 is connected to the seat body, it can play a role in supporting the user's back. Setting the backrest bracket 100 as a hollow structure is beneficial to reducing the weight of the backrest bracket 100 and lowering the cost of the backrest bracket 100. The card holes 130 on the backrest bracket 100 communicate with the interior of the backrest bracket 100 being hollow. The number of card holes 130 in this embodiment is not limited, and those skilled in the art can set the number of card holes 130 according to actual needs. The plurality of card holes 130 are arranged at intervals around the hollowed-out portion 110. It is worth mentioning that the hollowed-out portion 110 of the backrest bracket 100 corresponds to the lining cloth 220 of the frame assembly 200. When the user leans on the backrest 10, the hollowed-out portion 110 provides a deformation space for the lining cloth 220, improving the user's comfort.

[0054] Exemplarily, the frame 210 of the frame assembly 200 can be made of PP (Polypropylene). A mesh cloth or other cloth can be used as the lining cloth 220, which is not uniquely limited here. The lining cloth 220 can be fixed on the frame 210 by means of bonding or fastening with fasteners, etc., and those skilled in the art can set it according to needs. It can be understood that when the frame 210 is installed on the backrest bracket 100, the frame 210 is located outside the hollowed-out portion 110. Thus, while the lining cloth 220 on the frame 210 covers the frame 210, it can also cover the hollowed-out portion 110.

[0055] It can be understood that the number of buckles 230 is the same as the number of card holes 130 on the backrest bracket 100. Through the mutual cooperation between the plurality of buckles 230 and the plurality of card holes 130, the frame 210 can be reliably fixed on the backrest bracket 100. When the frame 210 is separated from the buckle 230, the frame 210 will not hinder the user from operating the buckle 230. The user only needs to squeeze the buckle 230 hard to remove the buckle 230 from the corresponding card hole 130.

[0056] The backrest 10 provided in this embodiment, multiple fasteners 230 of the frame assembly 200 are detachably connected to the frame 210 respectively. The frame assembly 200 can be installed on one side of the backrest bracket 100 through the snap connection between multiple fasteners 230 on the frame 210 and multiple locking holes 130 on the backrest bracket 100. Since the lining cloth 220 covers the frame 210, the lining cloth 220 also covers the hollow part 110 of the backrest bracket 100. When the lining cloth 220 is damaged and needs to be replaced, the lining cloth 220 on the frame 210 can be cut, and the frame 210 is separated from the multiple fasteners 230, then the frame 210 can be removed from the backrest bracket 100. After the frame 210 is removed, each fastener 230 is removed from the corresponding locking hole 130 respectively to realize the disassembly of the frame assembly 200. The user can install a new frame assembly 200 on the backrest bracket 100.

[0057] In one embodiment, as Figures 8 - 15 shown, multiple receiving grooves 211 are provided on one side of the frame 210 facing the backrest bracket 100, and multiple receiving grooves 211 respectively receive multiple fasteners 230 in a one-to-one correspondence.

[0058] The fastener 230 includes a first connection section 231 and two second connection sections 232 respectively located on opposite sides of the first connection section 231. The first connection section 231 is located in the receiving groove 211. One end of the second connection section 232 far from the first connection section 231 extends out of the receiving groove 211 and is provided with a hook portion 234. The part of the fastener 230 located in the receiving groove 211 is detachably connected to the frame 210.

[0059] Exemplarily, the cross-sectional shape of the receiving groove 211 can be rectangular. After a part of the fastener 230 extends into the receiving groove 211, the receiving groove 211 can limit the fastener 230.

[0060] Among them, both the first connection section 231 and the second connection section 232 of the fastener 230 are sheet-like structures. The first connection section 231 and the two second connection sections 232 form an approximate "U" - shaped structure. The closed end of the "U" - shaped structure is located inside the receiving groove 211, and the open end of the "U" - shaped structure extends out of the receiving groove 211.

[0061] In a possible implementation manner, after the fastener 230 extends into the receiving groove 211, a fastener can be used to lock the fastener 230 and the frame 210. When the frame assembly 200 needs to be disassembled, the fastener on the frame 210 is removed to separate the fastener 230 from the frame 210.

[0062] During the installation of the frame assembly 200 on the backrest support 100, a plurality of fasteners 230 on the frame 210 are aligned with a plurality of keyholes 130 of the backrest support 100. The frame assembly 200 is pushed in the direction close to the backrest support 100. The hook portions 234 of the fasteners 230 driven by the frame 210 pass through the corresponding keyholes 130. After the hook portions 234 pass through the keyholes 130, they are reset under the elastic force of the second connecting sections 232. The hook portions 234 of the fasteners 230 abut against the edges of the keyholes 130, thereby fixing the frame assembly 200 on the backrest support 100.

[0063] In this embodiment, the fasteners 230 can be limited by the receiving grooves 211 of the frame assembly 200. After the hook portions 234 on the fasteners 230 abut against the edges of the keyholes 130, the frame 210 can be fixed on the backrest support 100. When the frame 210 is separated from the fasteners 230, the user pinches the two second connecting sections 232 of the fasteners 230 to make the ends of the two second connecting sections 232 of the fasteners 230 away from the first connecting section 231 approach each other, that is, to make the hook portions 234 of the fasteners 230 pass through the keyholes 130, which is convenient for removing the fasteners 230 from the backrest support 100.

[0064] In a specific embodiment, as Figure 3 、 Figure 7 and Figure 8 shown, the frame assembly 200 further includes a first fastener 240. The first fastener 240 passes through the frame 210 and extends between the two second connecting sections 232. The part of the second connecting section 232 located in the receiving groove 211 is detachably connected to the frame 210, and the second connecting section 232 abuts against the first fastener 240.

[0065] During the connection of the fasteners 230 and the frame 210, the ends of the two second connecting sections 232 away from the first connecting section 231 can be made to approach each other. One end of the fasteners 230 is placed in the receiving groove 211, and a bolt is used as the first fastener 240. The screw of the bolt passes through the frame 210 and extends between the two second connecting sections 232. During the process of the first fastener 240, i.e., the bolt, extending between the two second connecting sections 232, the screw of the first fastener 240 expands the two second connecting sections 232 of the fasteners 230, that is, the screw of the first fastener 240 pushes the second connecting section 232 to make the end of the second connecting section 232 away from the first connecting section 231 approach the side wall of the receiving groove 211, so that the second connecting section 232 can be connected to the frame 210.

[0066] It can be understood that the first fastener 240 can limit the second connecting section 232 of the buckle 230, preventing the distance between the end of the second connecting section 232 away from the first connecting section 231 and the side wall of the receiving groove 211 from increasing, ensuring the reliability of the connection between the buckle 230 and the frame 210, and preventing the buckle 230 from disengaging from the receiving groove 211. It is worth mentioning that the lining cloth 220 covers the head of the first fastener 240.

[0067] In a possible implementation, a receiving portion 212 is provided on the side of the frame 210 facing away from the backrest bracket 100. The position of the receiving portion 212 corresponds to the position of the receiving groove 211. After the first fastener 240 is connected to the frame 210, its head is located inside the receiving portion 212, preventing the head of the first fastener 240 from protruding from the frame 210.

[0068] When it is necessary to separate the buckle 230 from the frame 210, first cut through the lining cloth 220, remove the first fastener 240 from the frame 210, and cancel the limitation of the bolt of the first fastener 240 on the second connecting section 232. The user can pull the frame 210 in a direction away from the backrest bracket 100. Since the buckle 230 is clamped with the card hole 130 of the backrest bracket 100, and the second connecting section 232 can move in a direction away from the side wall of the receiving groove 211 without the limitation of the first fastener 240, the buckle 230 can be disengaged from the receiving groove 211 during the process of pulling the frame 210 to achieve the separation of the buckle 230 from the frame 210.

[0069] As Figure 3 、 Figure 8 and Figures 11 - 15 shown, barbs 233 are respectively provided on the opposite sides of the two second connecting sections 232 of the buckle 230, and the barbs 233 are inserted into the frame 210.

[0070] Schematically, the barb 233 can be a sheet-like structure, and one end of it away from the main body part of the second connecting section 232 has a sharp angle, and the number of sharp angles can be multiple. During the process of the screw of the first fastener 240 extending between the two second connecting sections 232, the screw of the first fastener 240 expands the two second connecting sections 232 of the buckle 230, ensuring that the barbs 233 on the second connecting section 232 can be inserted into the frame 210 and will not disengage from the frame 210.

[0071] In this embodiment, after the barb 233 is inserted into the frame 210, the connection between the frame 210 and the buckle 230 is achieved, ensuring that the buckle 230 will not disengage from the receiving groove 211 of the frame 210 without disassembling the first fastener 240.

[0072] Figure 3 、 Figure 8 andFigures 11 - 15 It is shown that in a specific embodiment, the extension direction of the barb portion 233 is inclined to the extension direction of the second connecting section 232, and the distance between the barb portion 233 and the second connecting section 232 gradually increases from the bottom of the accommodating groove 211 to the groove opening.

[0073] Exemplarily, the angle between the barb portion 233 and the second connecting section 232 can be 45°, 60° or 70°, etc., which is not limited here. Optionally, a portion of the second connecting section 232 can be bent in a direction away from the two second connecting sections 232, and the bent portion can form the barb portion 233.

[0074] Through the above arrangement, when the second connecting section 232 is limited by the screw of the first fastener 240 , the buckle 230 is not easy to move toward the notch direction of the receiving groove 211 , thereby ensuring the reliability of the connection between the buckle 230 and the frame 210 .

[0075] In another possible implementation, a protrusion is provided on the side wall of the accommodating groove 211 , a limiting hole is provided on the second connecting section 232 , and the protrusion passes through the limiting hole.

[0076] The protrusion can be provided on the side wall of the receiving groove 211 by an integrated molding process. The protrusions can be provided on two opposite side walls of the receiving groove 211, and the limiting holes can be provided on the two second connecting sections 232 of the buckle 230. Alternatively, the protrusion can be provided on only one of the side walls of the receiving groove 211, and the limiting hole can be provided on only one of the second connecting sections 232 of the buckle 230.

[0077] When the screw of the first fastener 240 is inserted between the two second connecting sections 232, the screw of the first fastener 240 expands the two second connecting sections 232 of the buckle 230, ensuring that the protrusion on the side wall of the receiving groove 211 can be inserted into the limiting hole on the second connecting section 232 and will not fall out of the limiting hole. It is worth mentioning that after the screw of the first fastener 240 is inserted between the two second connecting sections 232, there is a gap between the end of the screw and the protrusion, avoiding interference between the first fastener 240 and the frame 210.

[0078] Optionally, a guide surface may be provided on the protrusion, and after the first fastener 240 is removed from the frame 210 , when the user pulls the frame 210 , the protrusion may be disengaged from the limiting hole under the action of the guide surface of the protrusion, so as to separate the buckle 230 from the frame 210 .

[0079] In this structure, after the protrusion extends into the limiting hole, the buckle 230 can be fixed on the frame 210 to ensure a reliable connection between the frame assembly 200 and the backrest bracket 100.

[0080] likeFigure 3 , Figure 13 and Figure 14 As shown in ,

[0081] , a fastening hole 235 for the screw of the first fastener 240 to pass through is provided on the first connection section 231. A plurality of protrusions 236 are provided on the side wall of the fastening hole 235. The plurality of protrusions 236 are arranged at intervals around the axis of the fastening hole 235, and the ends of the protrusions 236 extend into the space between two adjacent teeth of the screw.

[0081] Exemplarily, the plurality of protrusions 236 may be arranged in a circular array around the axis of the fastening hole 235. The number of the protrusions 236 may be 4, 6, 8, etc., and is not uniquely limited herein. It can be understood that during the process of the first fastener 240 rotating relative to the frame 210, the ends of the protrusions 236 are engaged with the threads on the screw of the first fastener 240, so that the screw of the first fastener 240 can pass through the first connection section 231 of the buckle 230 and extend between the two second connection sections 232 of the buckle 230.

[0082] In this structure, a plurality of protrusions 236 are provided on the side wall of the fastening hole 235. During the installation of the first fastener 240, there is no interference between the first connection section 231 and the screw of the first fastener 240, ensuring that the screw of the first fastener 240 can reliably extend between the two second connection sections 232 of the buckle 230, and further reliably limiting the second connection section 232. In addition, the first connection section 231 of the buckle 230 is threadedly connected to the screw of the first fastener 240 through a plurality of protrusions 236, which can play a "double insurance" role, that is, the first fastener 240 can play a certain limiting role on the buckle 230, and at the same time, the second connection section 232 of the buckle 230 is detachably connected to the frame 210, making the buckle 230 less likely to be disengaged from the receiving groove 211 of the frame 210.

[0083] As Figure 11 and Figure 14 shown, in a possible implementation manner, extension portions 2311 exceeding the second connection section 232 are respectively provided on opposite sides of the first connection section 231, and the ends of the extension portions 2311 abut against the side wall of the receiving groove 211.

[0084] Specifically, the ends of the two extension portions 2311 respectively abut against the two opposite side walls of the receiving groove 211. Through the cooperation between the extension portions 2311 and the side wall of the receiving groove 211, the relative movement of the first connection section 231 relative to the receiving groove 211 can be avoided, thereby ensuring that the buckle 230 can be reliably engaged with the locking hole 130 on the backrest bracket 100.

[0085] In one embodiment, as Figures 4 - 7 , Figure 16 and Figure 17As shown, a circular groove 120 is further provided on the backrest bracket 100 around the hollow portion 110. A plurality of card holes 130 are respectively located in the circular groove 120, and the frame body 210 extends into the circular groove 120.

[0086] Schematically, the shape and size of the circular groove 120 respectively match those of the frame body 210. After the frame body 210 extends into the circular groove 120, the circular groove 120 can limit the frame body 210. Among them, a plurality of card holes 130 are respectively arranged at the bottom of the circular groove 120. After the frame body 210 extends into the circular groove 120, a plurality of buckles 230 on the frame body 210 are respectively clamped with a plurality of card holes 130 in the circular groove 120.

[0087] By providing the circular groove 120 on the backrest bracket 100 and using the circular groove 120 to accommodate the frame body 210, the size of the part of the frame body 210 protruding from the backrest bracket 100 can be reduced, which is beneficial to improving the comfort of the backrest 10. In addition, by limiting the frame body 210 through the circular groove 120, the reliability of the connection between the frame body assembly 200 and the backrest bracket 100 can be improved.

[0088] Optionally, as Figures 8 - 10 shown, a plurality of grooves 213 arranged at intervals are provided on the outer periphery of the frame body 210. The lining cloth 220 is fixed to the frame body 210 through a plurality of second fasteners, and the heads of the second fasteners are located in the grooves 213.

[0089] Specifically, a plurality of grooves 213 are arranged around the frame body 210. Schematically, the lining cloth 220 covers the outer side wall of the frame body 210. A nail gun can be used as the second fastener. The second fastener passes through the lining cloth 220 and is locked on the frame body 210 to realize the fixation between the lining cloth 220 and the frame body 210. It can be understood that the depth of the groove 213 is not less than the thickness of the head of the second fastener.

[0090] The above settings can ensure the reliability of the connection between the lining cloth 220 and the frame body 210, and at the same time, prevent the heads of the second fasteners from protruding from the frame body 210.

[0091] This application also provides a seat, which is used to be installed on a mobility scooter or made into a wheelchair. The seat includes a seat body and the above-mentioned backrest 10, and the backrest bracket 100 of the backrest 10 is connected to the seat body.

[0092] In a possible implementation manner, the wheelchair provided by this application can be used as furniture in addition to being installed on a mobility scooter or made into a wheelchair.

[0093] For the seat provided in this embodiment, due to adopting the above-mentioned backrest 10, during long-term use, when the lining cloth 220 of the backrest 10 is damaged, the user can replace the new lining cloth 220, improving the user experience.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A backrest (10), characterized in that: include: A backrest bracket (100) is a hollow structure, wherein the backrest bracket (100) is provided with a hollow portion (110) and a plurality of clamping holes (130), each of the clamping holes (130) is located on one side of the backrest bracket (100), and the plurality of clamping holes (130) are arranged at intervals on the outside of the hollow portion (110); A frame assembly (200) comprises a frame (210), a lining cloth (220) and a plurality of buckles (230); the frame (210) is located on one side of the backrest bracket (100); the plurality of buckles (230) are respectively detachably connected to the frame (210); the plurality of buckles (230) are respectively engaged and connected with the plurality of clamping holes (130) in a one-to-one correspondence; the lining cloth (220) is mounted on the frame (210) and covers the frame (210), so that the lining cloth (220) covers the hollow portion (110).

2. The backrest (10) according to claim 1, characterized in that A plurality of receiving grooves (211) are provided on one side of the frame (210) facing the backrest bracket (100), and the plurality of receiving grooves (211) receive the plurality of buckles (230) in a one-to-one correspondence; The buckle (230) comprises a first connecting section (231) and two second connecting sections (232) respectively located on opposite sides of the first connecting section (231); the first connecting section (231) is located in the receiving groove (211); one end of the second connecting section (232) away from the first connecting section (231) extends out of the receiving groove (211) and is provided with a hook-shaped portion (234); the portion of the buckle (230) located in the receiving groove (211) is detachably connected to the frame (210).

3. The backrest (10) according to claim 2, characterized in that The frame assembly (200) further comprises a first fastener (240), the first fastener (240) passing through the frame (210) and extending between the two second connecting sections (232), the portion of the second connecting section (232) located in the receiving groove (211) being detachably connected to the frame (210), and the second connecting section (232) abutting against the first fastener (240).

4. The backrest (10) according to claim 3, characterized in that Barb portions (233) are respectively provided on opposite sides of the two second connection sections (232) of the buckle (230), and the barb portions (233) are inserted into the frame (210).

5. The backrest (10) according to claim 4, characterized in that The extension direction of the barb portion (233) is inclined to the extension direction of the second connecting section (232), and the distance between the barb portion (233) and the second connecting section (232) gradually increases from the bottom of the accommodating groove (211) to the groove opening.

6. The backrest (10) according to claim 3, characterized in that A protrusion is provided on the side wall of the accommodating groove (211), a limiting hole is provided on the second connecting section (232), and the protrusion is arranged through the limiting hole.

7. The backrest (10) according to claim 3, characterized in that The first connecting section (231) is provided with a fastening hole (235) for the screw of the first fastener (240) to pass through, and the side wall of the fastening hole (235) is provided with a plurality of protrusions (236), the plurality of protrusions (236) are arranged at intervals around the axis of the fastening hole (235), and the end of each protrusion (236) extends between two adjacent teeth of the screw; and / or, Extending portions (2311) extending beyond the second connecting portion (232) are respectively arranged on opposite sides of the first connecting portion (231), and ends of the extending portions (2311) abut against side walls of the accommodating groove (211).

8. The backrest (10) according to claim 1, characterized in that The backrest bracket (100) is also provided with an annular groove (120) arranged around the hollow portion (110), a plurality of the clamping holes (130) are respectively located in the annular groove (120), and the frame (210) extends into the annular groove (120).

9. The backrest (10) according to claim 1, characterized in that The outer periphery of the frame (210) is provided with a plurality of grooves (213) arranged at intervals, the lining cloth (220) is fixed to the frame (210) via a plurality of second fasteners, and the heads of the second fasteners are located in the grooves (213).

10. A seat, characterized in that: The seat is used to be installed on a mobility scooter or made into a wheelchair; The seat comprises a seat body and a backrest (10) according to any one of claims 1 to 9, and a backrest bracket (100) of the backrest (10) is connected to the seat body.

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