Backrest assembly and seat

Abstract

The utility model relates to the technical field of seats, in particular to a backrest assembly and a seat. The backrest assembly comprises a backrest support, wherein a first fixing part is mounted on the back surface of the backrest support; a second fixing part and a third fixing part are arranged on the side, facing the backrest support, of the backrest bag, the third fixing part is located on one side of the second fixing part, the second fixing part is detachably connected with the first fixing part, and the third fixing part is detachably connected with the backrest support. The backrest bag can be detachably installed on the backrest support through cooperation between the first fixing piece and the second fixing piece and cooperation between the third fixing piece and the backrest support. The backrest bag is not limited to be used on the backrest bracket, so that the use scene and the utilization rate of the backrest bag are improved.

Description

Technical Field

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

[0002] As an essential item in daily life, a seat supports the user's back through a backrest assembly to ensure the comfort of the user during use.

[0003] Currently, a seat includes a seat body and a backrest assembly mounted on the seat body. The seat can be installed on a mobility scooter or made into a wheelchair. To facilitate the user in carrying items, a backrest bag is provided on the side of the backrest assembly facing away from the user. The backrest bag is fixedly installed on the backrest bracket through a fastener, and the user can place the carried backrest bag in the backrest bag.

[0004] However, the usage scenarios of the backrest bag are limited and the utilization rate is low. Summary of the Utility Model

[0005] Based on this, this application provides a backrest assembly and a seat to solve the problems of limited usage scenarios and low utilization rate of the backrest bag in the related art.

[0006] On the one hand, this application provides a backrest assembly, including:

[0007] A backrest bracket, on the back surface of which a first fixing member is installed;

[0008] A backrest bag, on the side facing the backrest bracket, a second fixing member and a third fixing member are provided. The third fixing member is located on one side of the second fixing member. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket.

[0009] In a possible implementation, a hollowed-out portion is provided on the backrest bracket;

[0010] One of the first fixing member and the second fixing member is a male snap head, and the other is a female snap head. The female snap head is provided with a receiving cavity for the male snap head to extend into. The receiving cavity has a locking area and an unlocking area that communicate with each other;

[0011] The third fixing member is a snap member;

[0012] When the male snap head is located in the locking area, the male snap head is locked with the female snap head, and the snap member is clamped to the edge of the hollowed-out portion; when the male snap head is located in the unlocking area, the male snap head is unlocked from the female snap head, and the snap member disengages from the edge of the hollowed-out portion.

[0013] In a possible implementation, a limiting protrusion is provided on the side wall of the locking area, and an annular groove for the limiting protrusion to extend into is provided on the side surface of the male snap head.

[0014] In a possible implementation, a protruding portion is provided at one end of the limit projection facing the unlocking area, and the protruding portion is configured to retain the male buckle in the locking area.

[0015] In a possible implementation, the buckle member is located below the second fixing member.

[0016] In a possible implementation, the number of buckle members is two, and the two buckle members are respectively located on opposite sides below the second fixing member.

[0017] In a possible implementation, step portions are respectively provided on opposite sides of the bottom edge of the hollow portion. The bottom edge of the step portion is configured to be engaged with the buckle member, and the side edge of the step portion is configured to abut against the buckle member.

[0018] In a possible implementation, a mounting seat is provided on the backrest bracket. The first fixing member is mounted on the mounting seat. A groove is provided on the side of the backrest pad facing the backrest bracket. The second fixing member is mounted in the groove. The groove extends to the end of the backrest pad. The mounting seat extends into the groove and can slide along the direction parallel to the connection line of the locking area and the unlocking area.

[0019] In a possible implementation, the male buckle is a magnetic member, and the male buckle is configured to be magnetically attracted to the female buckle.

[0020] On the other hand, the present application also provides a seat, which is configured to be mounted on a mobility scooter or made into a wheelchair. The seat includes a seat body and the above-mentioned backrest assembly, and the backrest bracket of the backrest assembly is connected to the seat body.

[0021] The backrest assembly and the seat provided by the present application, the backrest assembly includes a backrest bracket and a backrest pad. The first fixing member is mounted on the back surface of the backrest bracket. The second fixing member and the third fixing member are provided on the side of the backrest pad facing the backrest bracket. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket. In this way, the backrest pad can be detachably mounted on the backrest bracket through the cooperation between the first fixing member and the second fixing member and the cooperation between the third fixing member and the backrest bracket. The backrest pad is not limited to being used on the backrest bracket, which improves the usage scenarios and utilization rate of the backrest pad. For example, a shoulder strap can be installed on the backrest pad. When needed, the user can remove the backrest pad from the backrest bracket and use it as a backpack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Structural schematic diagram of the backrest assembly provided by the embodiment of the present application on the back side;

[0024] Figure 2 Structural schematic diagram of the backrest assembly provided by the embodiment of the present application on the front side;

[0025] Figure 3 Schematic diagram of the separation of the backrest bag and the backrest bracket provided by the embodiment of the present application Figure 1 ;

[0026] Figure 4 Schematic diagram of the separation of the backrest bag and the backrest bracket provided by the embodiment of the present application Figure 2 ;

[0027] Figure 5 Exploded view of the backrest assembly provided by the embodiment of the present application;

[0028] Figure 6 Structural schematic diagram of the female buckle provided by the embodiment of the present application;

[0029] Figure 7 Schematic diagram of the separation of the male buckle and the female buckle provided by the embodiment of the present application;

[0030] Figure 8 Schematic diagram of the male buckle located in the unlocking area of the female buckle provided by the embodiment of the present application;

[0031] Figure 9 Schematic diagram of the male buckle located in the locking area of the female buckle provided by the embodiment of the present application.

[0032] Explanation of reference numerals:

[0033] 100 - Backrest bracket; 110 - Hollowed - out part; 111 - Step part; 120 - Male buckle; 121 - Annular groove; 130 - Mounting seat;

[0034] 200 - Backrest bag; 210 - Female buckle; 211 - Accommodating cavity; 2111 - Locking area; 2112 - Unlocking area; 2113 - Limiting protrusion; 2114 - Protruding part; 220 - Buckle part; 230 - Groove. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of this application. In the drawings, the same or similar reference numerals represent 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 this application. The embodiments described below by referring to the drawings are exemplary and are intended to explain this application and should not be construed as a limitation to this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the drawings.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or an indirect connection through an intermediate medium. It can be the connection inside 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 this application can be understood according to specific circumstances.

[0037] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component 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 this application.

[0038] The terms "first", "second", "third" (if any) in the description, claims, and accompanying drawings of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0039] In addition, the terms "include" and "have" 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.

[0040] In the prior art, a seat includes a seat body and a backrest assembly mounted on the seat body. The seat can be mounted on a mobility scooter or made into a wheelchair. To facilitate users to carry items, a backrest bag is provided on the side of the backrest assembly facing away from the user. The backrest bag is fixedly mounted on the backrest bracket through fasteners, and users can place the backrest bag they carry with them in the backrest bag. However, the backrest bag is not easy to disassemble from the backrest bracket. Users only use the backrest bag when using the seat, so the usage scenario of the backrest bag is limited and the utilization rate is low.

[0041] After repeated thinking and verification, the inventor found that a first fixing member is provided on the backrest bracket of the backrest assembly, and a second fixing member and a third fixing member are provided on the backrest bag. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket. In this way, the backrest bag can be mounted on the backrest bracket and can be easily removed from the backrest bracket. A shoulder strap can be mounted on the backrest bag, and the backrest bag can be used as a backpack after being removed from the backrest bracket, which improves the usage scenario and utilization rate of the backrest bag.

[0042] In view of this, the inventor designed a backrest assembly and a seat. The backrest assembly is provided with a first fixing member on the backrest bracket, and a second fixing member and a plurality of third fixing members are mounted on the backrest bag. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket. The backrest bag can be easily mounted on or removed from the backrest bracket. The backrest bag is not limited to being used on the backrest bracket, which improves the usage scenario and utilization rate of the backrest bag.

[0043] The technical solutions of the backrest assembly and the seat provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] Referring to Figures 1 to 5 As shown, the backrest assembly provided by the embodiment of the present application includes a backrest bracket 100 and a backrest bag 200. A first fixing member is mounted on the back of the backrest bracket 100. On the side of the backrest bag 200 facing the backrest bracket 100, a second fixing member and a third fixing member are provided, and the third fixing member is located on one side of the second fixing member. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket.

[0045] Exemplarily, the backrest bracket 100 can be made of carbon steel material. It should be noted that the back of the backrest bracket 100 is the side of the backrest bracket 100 facing away from the user during use, and correspondingly, the front of the backrest bracket 100 is the side of the backrest bracket 100 facing the user during use. Optionally, the first fixing member can be fixed on the backrest bracket 100 by means of welding, fastening with fasteners or snap connection, etc.

[0046] Among them, the second fixing member can be arranged near one end of the backrest bag 200, and the third fixing member can be arranged near the other end of the backrest bag 200. It can be understood that when the second fixing member is connected to the first fixing member and the third fixing member is connected to the backrest bracket, the backrest bag 200 is installed on the backrest bracket 100. Compared with the solution in the related art where the backrest bag 200 is locked to the backrest bracket 100 by multiple fasteners, the backrest bag 200 can be more easily disassembled from the backrest bracket 100.

[0047] For the backrest assembly provided in this embodiment, the backrest bag 200 can be detachably installed on the backrest bracket 100 through the cooperation between the first fixing member and the second fixing member and the cooperation between the third fixing member and the backrest bracket. The backrest bag 200 is not limited to being used on the backrest bracket 100, which improves the usage scenarios and utilization rate of the backrest bag 200. For example, a shoulder strap can be installed on the backrest bag 200. When needed, the user can remove the backrest bag 200 from the backrest bracket 100 and use it as a backpack.

[0048] In one embodiment, as Figures 1 - 6 shown, a hollow portion 110 is provided on the backrest bracket 100. One of the first fixing member and the second fixing member is a male buckle 120, and the other is a female buckle 210. The female buckle 210 is provided with a receiving cavity 211 for the male buckle 120 to extend into. The receiving cavity 211 has a locking area 2111 and an unlocking area 2112 that communicate with each other. The third fixing member is a buckle member 220.

[0049] When the male buckle 120 is located in the locking area 2111, the male buckle 120 is locked with the female buckle 210, and the buckle member 220 is clamped with the edge of the hollow portion 110; when the male buckle 120 is located in the unlocking area 2112, the male buckle 120 is unlocked from the female buckle 210, and the buckle member 220 is disengaged from the edge of the hollow portion 110.

[0050] Illustratively, the first fixing member is located on one side of the hollow portion. A mesh can be used to cover the hollow portion 110 on the front of the backrest bracket 100. The hollow portion 110 provides a deformation space for the mesh to ensure the comfort of the user.

[0051] It should be noted that this embodiment takes the first fixing member as the male buckle 120 and the second fixing member as the female buckle 210 as an example for illustration, but it is not a limitation on the protection scope of the present application. Those skilled in the art can also use the female buckle 210 as the first fixing member and the male buckle 120 as the second fixing member.

[0052] Wherein, after the male buckle 120 extends into the receiving cavity 211 of the female buckle 210, the user can apply an external force to the backrest 200 so that the part of the male buckle 120 extending into the receiving cavity 211 moves between the locking area 2111 and the unlocking area 2112. When the female buckle 210 is relative to the male buckle 120, the backrest 200 drives the plurality of buckle members 220 to move synchronously relative to the backrest bracket 100, so as to realize the engagement or disengagement of the buckle members 220 with the edge of the hollow part 110.

[0053] Schematically, the buckle member 220 is formed into an approximate "L" - shaped structure. One end of the "L" - shaped structure is connected to the backrest 200, and the other end of the "L" - shaped structure extends towards the square away from the second fixing member. The other end of the "L" - shaped structure is used to engage with the edge of the hollow part 110.

[0054] During the process of connecting the backrest 200 to the backrest bracket 100, the backrest 200 can be held close to the backrest bracket 100, so that the end of the male buckle 120 extends into the unlocking area 2112 of the receiving cavity 211 of the female buckle 210. At this time, the end of the buckle member 220 away from the backrest 200 passes through the hollow part 110. Adjust the position of the backrest 200 relative to the backrest bracket 100 so that the part of the male buckle 120 located in the receiving cavity 211 moves from the unlocking area 2112 to the locking area 2111. At this time, the male buckle 120 is locked with the female buckle, and each buckle member 220 is engaged with the edge of the hollow part 110. When it is necessary to disassemble the backrest 200 on the backrest bracket 100, adjust the position of the backrest 200 relative to the backrest bracket 100 again, so that the part of the male buckle 120 located in the receiving cavity 211 moves from the locking area 2111 to the unlocking area 2112, and then the backrest 200 can be removed from the backrest bracket 100.

[0055] With this structure, the installation and disassembly of the backrest 200 are relatively easy. By locking the male buckle 120 by the locking area 2111 of the female buckle 210, the backrest 200 can be reliably fixed on the backrest bracket 100.

[0056] In a specific embodiment, as Figures 6 - 9 shown, a limiting protrusion 2113 is provided on the side wall of the locking area 2111, and an annular groove 121 for the limiting protrusion 2113 to extend into is provided on the side surface of the male buckle 120.

[0057] Exemplarily, the limiting protrusion 2113 can be an arc-shaped structure, protruding from the side wall of the receiving cavity 211. After the male snap 120 extends into the receiving cavity 211, the annular groove 121 on the male snap 120 is also located within the receiving groove. After the part of the male snap 120 extending into the receiving cavity 211 moves from the unlocking area 2112 to the locking area 2111 relative to the female snap 210, the limiting protrusion 2113 extends into the annular groove 121. After the part of the male snap 120 extending into the receiving cavity 211 moves from the locking area 2111 to the unlocking area 2112 relative to the female snap 210, the limiting protrusion 2113 disengages from the annular groove 121.

[0058] In a possible implementation manner, limiting protrusions 2113 are respectively provided on the side walls of the receiving cavity 211 on opposite sides of the locking area 2111. After each limiting protrusion 2113 extends into the annular groove 121, the reliability of the locking of the female snap 210 to the male snap 120 can be ensured.

[0059] In this structure, after the limiting protrusion 2113 extends into the annular groove 121, the male snap 120 can be limited to prevent the male snap 120 from disengaging from the female snap 210; after the limiting protrusion 2113 disengages from the annular groove 121, the female snap 210 releases the limitation on the male snap 120, and the backrest 200 can be removed from the backrest bracket 100.

[0060] In a more specific embodiment, as Figures 6 - 9 shown, a protruding portion 2114 is provided at one end of the limiting protrusion 2113 facing the unlocking area 2112, and the protruding portion 2114 is configured to intercept the male snap 120 within the locking area 2111.

[0061] Schematically, the height by which the protruding portion 2114 protrudes from the side wall of the receiving cavity 211 is greater than the height by which the limiting protrusion 2113 protrudes from the side wall of the receiving cavity 211. Figure 6 It is shown that protruding portions 2114 are respectively provided on the side walls of the receiving cavity 211 on opposite sides, and the interval between the two protruding portions 2114 forms an opening for the male snap 120 to pass through. The opening between the two protruding portions 2114 is configured to be able to open under pressure to allow the male snap 120 to pass through the opening and then enter the unlocking area 2112. The opening returns to its initial state after the extrusion force disappears to intercept the male snap 120 within the locking area 2111.

[0062] In this structure, when a user applies an external force to the backrest bag 200, the female buckle 210 on the backrest bag 200 can move relative to the male buckle 120, enabling the male buckle 120 to move between the locking area 2111 and the unlocking area 2112 across the protruding portion 2114. When no external force is applied to the backrest bag 200, the protruding portion 2114 can restrict the male buckle 120 from moving from the unlocking area 2112 to the locking area 2111 relative to the female buckle 210, ensuring the locking effect between the male buckle 120 and the female buckle hole, and further ensuring the reliability of the connection between the backrest bag 200 and the backrest bracket 100.

[0063] In a specific embodiment, as Figures 2 - 9 shown, the buckle member 220 is located below the second fixing member.

[0064] When the male buckle 120 is installed on the backrest bracket 100 and the female buckle 210 is installed on the backrest bag 200, the locking area 2111 of the receiving cavity 211 is located above the unlocking area 2112; when the male buckle 120 is installed on the backrest bag 200 and the female buckle 210 is installed on the backrest bracket 100, the locking area 2111 of the receiving cavity 211 is located below the unlocking area 2112.

[0065] During the assembly of the backrest bag 200, after the end of the male buckle 120 extends into the unlocking area 2112 of the female buckle 210, the backrest bag 200 can be adjusted downward, causing the male buckle 120 to move from the unlocking area 2112 to the locking area 2111 relative to the female buckle 210. At this time, the buckle member 220 is engaged with the bottom edge of the hollow portion 110.

[0066] With the above arrangement, after the backrest bag 200 is installed on the backrest bracket 100, under the action of its own gravity, the male buckle 120 is not likely to move from the locking area 2111 to the unlocking area 2112, which is beneficial to improving the reliability of the connection between the backrest bag 200 and the backrest bracket 100.

[0067] In a specific implementation manner, as Figure 2 、 Figure 4 and Figure 5 shown, the number of buckle members 220 is two, and the two buckle members 220 are respectively located on opposite sides below the second fixing member.

[0068] It can be understood that the backrest bag 200 and the backrest bracket 100 are locked at three points, which not only ensures the reliable connection between the backrest bag 200 and the backrest bracket 100, but also facilitates the user to install the backrest bag 200 on the backrest bracket 100. In addition, the small number of buckle members 220 is beneficial to reducing the cost of the backrest bag 200.

[0069] In other embodiments, the number of the fasteners 220 may also be one or more, and there is no unique limitation here.

[0070] Figures 3 - 5 As shown, stepped portions 111 are respectively provided on opposite sides of the bottom edge of the hollow portion 110. The bottom edge of the stepped portion 111 is configured to be snap-connected to the fastener 220, and the side edge of the stepped portion 111 is configured to abut against the fastener 220.

[0071] Specifically, the stepped portion 111 forms an approximate "L" - shaped structure. The bottom edge of the "L" - shaped structure is used for snap - connection with the fastener 220, and the side edge of the "L" - shaped structure is used for abutting against the fastener 220. Among them, the two fasteners 220 on the backrest bag 200 are located between the side edges of the two stepped portions 111.

[0072] The stepped portion 111 can limit the fastener 220. After the two fasteners 220 are respectively snap - connected to the two stepped portions 111, the two stepped portions 111 can limit the left - right movement of the bottom of the backrest bag 200 relative to the backrest bracket 100, further improving the reliability of the connection between the backrest bag 200 and the backrest bracket 100.

[0073] As Figures 3 - 5 shown, an installation seat 130 is provided on the backrest bracket 100. The first fixing member is installed on the installation seat 130. A groove 230 is provided on the side of the backrest bag 200 facing the backrest bracket 100. The second fixing member is installed in the groove 230. The groove 230 extends to the end of the backrest bag 200. The installation seat 130 extends into the groove 230 and can slide along the direction parallel to the connection line of the locking area 2111 and the unlocking area 2112.

[0074] Schematically, on the back of the backrest bracket 100, the installation seat 130 protrudes from the edge of the hollow portion 110. Among them, the depth of the groove 230 can match the height of the installation seat 130 protruding from the edge of the hollow portion 110.

[0075] Specifically, the connection line of the locking area 2111 and the unlocking area 2112 extends along the height direction of the backrest bag 200. As Figure 4 shown, the top end of the groove 230 extends to the end of the backrest bag 200. The installation seat 130 can slide into the inside of the groove 230 from the top end of the groove 230. When the installation seat 130 is located inside the groove 230, the two opposite side walls of the groove 230 can respectively abut against both sides of the installation seat 130.

[0076] With this structure, the cooperation between the groove 230 and the installation seat 130 can limit the movement direction of the backrest bag 200 relative to the backrest bracket 100, and the user can install and disassemble the backrest bag 200 more smoothly.

[0077] In a possible implementation, the buckle male connector 120 is a magnetic component, and the buckle male connector 120 is configured to be magnetically attracted to the buckle female connector 210 .

[0078] Among them, the female snap-on head 210 can be made of metal material. Under the magnetic force of the male snap-on head 120, the user can easily extend the end of the male snap-on head 120 into the interior of the female snap-on head 210, so that the user can install the backrest bag 200 on the backrest bracket 100.

[0079] The present application also provides a seat, which is configured to be installed on a mobility scooter or made into a wheelchair. The seat comprises a seat body and the above-mentioned backrest assembly, and a backrest bracket 100 of the backrest assembly is connected to the seat body.

[0080] The seat provided in the present application adopts the above-mentioned backrest assembly, so the user can easily install and disassemble the backrest bag 200, thereby improving the user's usage experience.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 embodiments of the present application.

Claims

1. A backrest assembly, characterized in that, Comprising: A backrest bracket (100), with a first fixing member mounted on the back surface of the backrest bracket (100); A backrest bag (200), on one side of the backrest bag (200) facing the backrest bracket (100), a second fixing member and a third fixing member are provided. The third fixing member is located on one side of the second fixing member. The second fixing member is detachably connected to the first fixing member, and the third fixing member is detachably connected to the backrest bracket (100).

2. The backrest assembly according to claim 1, wherein, A hollow portion (110) is provided on the backrest bracket (100); One of the first fixing member and the second fixing member is a male buckle (120), and the other is a female buckle (210). The female buckle (210) is provided with a receiving cavity (211) for the male buckle (120) to extend into. The receiving cavity (211) has a locking area (2111) and an unlocking area (2112) that communicate with each other; The third fixing member is a buckle member (220); When the male buckle (120) is located in the locking area (2111), the male buckle (120) is locked with the female buckle (210), and the buckle member (220) is clamped with the edge of the hollow portion (110); when the male buckle (120) is located in the unlocking area (2112), the male buckle (120) is unlocked from the female buckle (210), and the buckle member (220) disengages from the edge of the hollow portion (110).

3. The backrest assembly according to claim 2, wherein, A limiting protrusion (2113) is provided on the side wall of the locking area (2111), and an annular groove (121) for the limiting protrusion (2113) to extend into is provided on the side surface of the male buckle (120).

4. The backrest assembly according to claim 3, characterized in that, One end of the limiting protrusion (2113) facing the unlocking area (2112) is provided with a protruding portion (2114), and the protruding portion (2114) is configured to intercept the male buckle (120) within the locking area (2111).

5. The backrest assembly according to claim 2, characterized in that, The buckle member (220) is located below the second fixing member.

6. The backrest assembly according to claim 5, wherein The number of the buckle members (220) is two, and the two buckle members (220) are respectively located on opposite sides below the second fixing member.

7. The backrest assembly according to claim 6, wherein Step portions (111) are respectively provided on opposite sides of the bottom edge of the hollow portion (110). The bottom edge of the step portion (111) is configured to be clamped with the buckle member (220), and the side edge of the step portion (111) is configured to abut against the buckle member (220).

8. The backrest assembly according to claim 2, wherein An installation seat (130) is provided on the backrest bracket (100). The first fixing member is installed on the installation seat (130). A groove (230) is provided on one side of the backrest bag (200) facing the backrest bracket (100). The second fixing member is installed in the groove (230). The groove (230) extends to the end of the backrest bag (200). The installation seat (130) extends into the groove (230) and can slide along a direction parallel to the connection line of the locking area (2111) and the unlocking area (2112).

9. The backrest assembly according to claim 2, wherein, The male buckle (120) is a magnetic component, and the male buckle (120) is configured to be magnetically attracted to the female buckle (210).

10. A seat, characterized in that, The seat is configured to be mounted on a mobility scooter or made into a wheelchair. The seat includes a seat body and the backrest assembly according to any one of claims 1-9. The backrest bracket (100) of the backrest assembly is connected to the seat body.

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