Height-adjustable backrest of wheelchair

Abstract

The utility model provides a height-adjustable backrest of a wheelchair, and relates to the field of wheelchair equipment, the height-adjustable backrest of the wheelchair comprises a wheelchair body and a backrest for a user to use, one side of the wheelchair body is fixedly provided with a mounting plate, one side of the mounting plate is provided with an adjusting assembly for adjusting the height of the backrest, and when the height of the backrest needs to be adjusted, the backrest is pulled to adjust the height of the backrest. The backrest drives the supporting block to move in the sliding groove, the supporting block drives the blocking piece to move, the blocking piece is inserted into the clamping grooves in different positions formed in the inner side of the sliding groove, and therefore the height of the backrest is adjusted, the height of the backrest can be rapidly adjusted through the structure, and using convenience is improved to a certain degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and specifically relates to an adjustable-height backrest for a wheelchair. Background Art

[0002] A wheelchair is a chair equipped with wheels that can help replace walking, and is mainly used in scenarios such as home rehabilitation, transportation, medical treatment, and outdoor activities for the wounded, sick, and disabled. It not only meets the transportation needs of the physically disabled and those with limited mobility, but more importantly, it facilitates the movement and care of patients by their families, enabling patients to exercise their bodies and participate in social activities with the help of a wheelchair.

[0003] In order to improve the comfort of users during use, a backrest for users is usually provided on the back of a wheelchair. Most of the existing backrests are fixed to the back of the wheelchair through insertion rods or bolts. When the user needs to adjust according to their own situation, it is necessary to disassemble and reassemble them, which greatly reduces the convenience during use and affects the user experience. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an adjustable-height backrest for a wheelchair.

[0005] The adjustable-height backrest for a wheelchair provided by the utility model includes a wheelchair body and a backrest for users. One side of the wheelchair body is fixedly provided with a mounting plate, and an adjusting assembly for adjusting the height of the backrest is provided on one side of the mounting plate;

[0006] The adjusting assembly includes a limiting plate, a support block, and a blocking member. One side of the limiting plate is fixedly connected to one side of the mounting plate. A sliding groove for the support block to slide is provided on the outer side of the limiting plate. One end of the support block is fixedly connected to one end of the backrest. A groove matching the blocking member is provided on one side of the support block. One end of the blocking member is fixedly connected to the inner side of the groove, and a plurality of card slots matching the blocking member are provided on the inner side of the sliding groove opened on the limiting plate.

[0007] Preferably, the blocking member includes a blocking block and a spring. One end of the spring is fixedly connected to the inner side of the groove, and the other end of the spring is fixedly connected to one side of the blocking block. The side of the blocking block away from the spring is located inside the card slot.

[0008] Preferably, the top of the blocking block is inclined from the side close to the spring to the side away from the spring.

[0009] Preferably, a reset assembly is provided on the side of the support block away from the blocking block. The reset assembly includes a connecting column and a grip rod. One end of the connecting column penetrates through one side of the support block and is fixedly connected to the side of the blocking block near the spring. The end of the connecting column away from the blocking block is fixedly connected to one side of the grip rod. A fixing groove for the movement of the connecting column is provided on the side of the limiting plate away from the mounting plate, and the fixing groove communicates with the sliding groove.

[0010] Preferably, through holes for facilitating the user's grip are provided on the surface of the grip rod.

[0011] Preferably, a pull rod is provided on one side of the backrest. The pull rod is concave-shaped, and two moving grooves for the movement of the pull rod are provided on the surface of the mounting plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] When it is necessary to adjust the height of the backrest, pull the backrest to drive the support block to move inside the sliding groove. The support block drives the blocking member to move, so that the blocking member is inserted into the card slots at different positions opened on the inner side of the sliding groove, thereby adjusting the height of the backrest. Through the above structure, the height of the backrest can be quickly adjusted, which improves the convenience in use to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the height-adjustable backrest of the wheelchair provided by the present utility model Figure 1 ;

[0015] Figure 2 is a schematic diagram of the overall structure of the height-adjustable backrest of the wheelchair provided by the present utility model Figure 2 ;

[0016] Figure 3 is a schematic diagram of the overall structure of the height-adjustable backrest of the wheelchair provided by the present utility model Figure 3 ;

[0017] Figure 4 is a schematic diagram of the overall structure of the mounting plate, backrest, and adjustment assembly provided by the present utility model;

[0018] Figure 5 is a schematic cross-sectional structure diagram of the limiting plate provided by the present utility model;

[0019] Figure 6 is a schematic exploded structure diagram of the blocking member provided by the present utility model.

[0020] Reference numerals in the figure: 1, wheelchair body; 2, backrest; 3, mounting plate; 4, limiting plate; 5, support block; 6, sliding groove; 7, groove; 8, clamping groove; 9, blocking block; 10, spring; 11, connecting column; 12, grip rod; 13, through hole; 14, pull rod; 15, movable groove; 16, fixed groove. Detailed implementation manner

[0021] The present utility model will be further described below in conjunction with specific embodiments.

[0022] As Figures 1-6 shown, a height-adjustable backrest 2 of a wheelchair includes a wheelchair body 1 and a backrest 2 for users. A mounting plate 3 is fixedly provided on one side of the wheelchair body 1. An adjusting assembly for adjusting the height of the backrest 2 is provided on one side of the mounting plate 3. The adjusting assembly includes a limiting plate 4, a support block 5 and a blocking member. One side of the limiting plate 4 is fixedly connected to one side of the mounting plate 3. A sliding groove 6 for the support block 5 to slide is provided on the outer side of the limiting plate 4. One end of the support block 5 is fixedly connected to one end of the backrest 2. A groove 7 matching the blocking member is provided on one side of the support block 5. One end of the blocking member is fixedly connected to the inner side of the groove 7. And a plurality of clamping grooves 8 matching the blocking member are provided on the inner side of the sliding groove 6 opened in the limiting plate 4;

[0023] The blocking member includes a blocking block 9 and a spring 10. One end of the spring 10 is fixedly connected to the inner side of the groove 7. The other end of the spring 10 is fixedly connected to one side of the blocking block 9. The side of the blocking block 9 away from the spring 10 is located inside the clamping groove 8. The top of the blocking block 9 is inclined from the side close to the spring 10 to the side away from the spring 10. A reset assembly is provided on the side of the support block 5 away from the blocking block 9. The reset assembly includes a connecting column 11 and a grip rod 12. One end of the connecting column 11 penetrates through one side of the support block 5 and is fixedly connected to the side of the blocking block 9 close to the spring 10. The end of the connecting column 11 away from the blocking block 9 is fixedly connected to one side of the grip rod 12. A fixed groove 16 for the connecting column 11 to move is provided on the side of the limiting plate 4 away from the mounting plate 3. And the fixed groove 16 is communicated with the sliding groove 6. Through holes 13 convenient for users to hold are provided on the surface of the grip rod 12. A pull rod 14 is provided on one side of the backrest 2. The pull rod 14 is arranged in a concave shape. Two movable grooves 15 for the pull rod 14 to move are provided on the surface of the mounting plate 3;

[0024] When it is necessary to adjust the height of the backrest 2 downward, pull the grip rod 12 to drive the connecting column 11 to move away from the limit plate 4. The connecting column 11 drives the blocking block 9 to move into the groove 7. At the same time when the blocking block 9 moves into the groove 7, the spring 10 will be compressed. When the blocking block 9 completely moves into the groove 7, pull the pull rod 14 to drive the backrest 2 to descend. After adjusting to the appropriate position, release the grip rod 12. Due to the elastic action of the spring 10, the blocking block 9 is driven to move into the clamping groove 8 opened on the inner side of the sliding groove 6, thereby completing the adjustment of the backrest 2. The through hole 13 provided on the surface of the grip rod 12 can provide better grip force for the user and facilitate the user's use.

[0025] The working principle provided by the present utility model is as follows: When it is necessary to adjust the height of the backrest 2 upward, pull the pull rod 14 to make the pull rod 14 move along the moving groove 15 opened on the surface of the mounting plate 3. The pull rod 14 drives the backrest 2 to move, so that the backrest 2 drives the support block 5 to move inside the sliding groove 6. The support block 5 drives the blocking block 9 to move, so that the top of the blocking block 9 is pressed against the inner top end of the clamping groove 8. Since the top of the blocking block 9 is inclined from the side close to the spring 10 to the side away from the spring 10, when the top of the blocking block 9 is pressed against the inner top end of the clamping groove 8, the blocking block 9 will receive a thrust force moving into the groove 7, so that the blocking block 9 moves into the groove 7 and compresses the spring 10. When the outside of the blocking block 9 no longer contacts the inner side of the clamping groove 8, the blocking block 9 can move inside the sliding groove 6. When the blocking block 9 moves to the position of another clamping groove 8 opened on the inner side of the sliding groove 6, due to the elastic action of the spring 10, the blocking block 9 will be driven to move into the clamping groove 8. By inserting the blocking block 9 into the clamping grooves 8 at different positions, the adjustment of the height of the backrest 2 is completed. At the same time, the backrest 2 can be limited by the blocking block 9 to prevent the backrest 2 from sliding downward when the user uses the backrest 2.

[0026] When it is necessary to adjust the height of the backrest 2 downward, pull the grip rod 12 to drive the connecting column 11 to move away from the limit plate 4. The connecting column 11 drives the blocking block 9 to move into the groove 7. At the same time when the blocking block 9 moves into the groove 7, the spring 10 will be compressed. When the blocking block 9 completely moves into the groove 7, pull the pull rod 14 to drive the backrest 2 to descend. After adjusting to the appropriate position, release the grip rod 12. Due to the elastic action of the spring 10, the blocking block 9 is driven to move into the clamping groove 8 opened on the inner side of the sliding groove 6, thereby completing the adjustment of the backrest 2. The through hole 13 provided on the surface of the grip rod 12 can provide better grip force for the user and facilitate the user's use.

Claims

1. A wheelchair with an adjustable backrest, comprising a wheelchair body (1) and a backrest (2) for a user, characterized in that: A mounting plate (3) is fixedly provided on one side of the wheelchair body (1), and an adjustment component for adjusting the height of the backrest (2) is provided on one side of the mounting plate (3); The adjustment assembly comprises a limit plate (4), a support block (5) and a blocking member, one side of the limit plate (4) is fixedly connected to one side of the mounting plate (3), a slide groove (6) for the support block (5) to slide is provided on the outer side of the limit plate (4), one end of the support block (5) is fixedly connected to one end of the backrest (2), one side of the support block (5) is provided with a groove (7) matching the blocking member, one end of the blocking member is fixedly connected to the inner side of the groove (7), and a plurality of slots (8) matching the blocking member are provided on the inner side of the slide groove (6) provided on the limit plate (4).

2. The height-adjustable backrest of the wheelchair according to claim 1, characterized in that: The blocking member comprises a blocking block (9) and a spring (10), one end of the spring (10) being fixedly connected to the inner side of the groove (7), the other end of the spring (10) being fixedly connected to one side of the blocking block (9), and the side of the blocking block (9) away from the spring (10) being located inside the slot (8).

3. The height-adjustable backrest of the wheelchair according to claim 2, characterized in that: The top of the blocking block (9) is inclined from a side adjacent to the spring (10) to a side away from the spring (10).

4. The height-adjustable backrest of the wheelchair according to claim 3, characterized in that: A reset assembly is provided on the side of the support block (5) away from the blocking block (9), and the reset assembly includes a connecting column (11) and a gripping rod (12), one end of the connecting column (11) passes through one side of the support block (5) and is fixedly connected to a side of the blocking block (9) adjacent to the spring (10), one end of the connecting column (11) away from the blocking block (9) is fixedly connected to one side of the gripping rod (12), and a fixing groove (16) for the connecting column (11) to move is provided on the side of the limiting plate (4) away from the mounting plate (3), and the fixing groove (16) is communicated with the sliding groove (6).

5. The height-adjustable backrest of the wheelchair according to claim 4, characterized in that: The surface of the grip rod (12) is provided with a through hole (13) for the convenience of the user to grip.

6. The height-adjustable backrest of the wheelchair according to claim 5, characterized in that: A pull rod (14) is provided on one side of the backrest (2), the pull rod (14) being arranged in a concave shape, and two movable grooves (15) for the pull rod (14) to move are provided on the surface of the mounting plate (3).

Images