Wheelchair with adjustable seat width

Abstract

The invention relates to a wheelchair, in particular to a wheelchair with adjustable seat width. The wheelchair provided by the invention is characterized in that the adjustment of the seat width of the wheelchair is discontinuous, and the width adjustment or narrowing is determined by the size of the pad in the left-right direction, which makes the user easily adjust the seat width of the wheelchair to the appropriate size according to the specifications of the back cushion and the seat cushion. The structure based on the adjustment mode of moving the pad position is relatively simple and has low manufacturing difficulty, which is beneficial to saving production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a wheelchair, in particular to a wheelchair with adjustable seat width. BACKGROUND

[0002] The seat plate of a wheelchair is relatively hard, and the comfort level is poor when directly sitting on it, so a cushion is usually arranged on the seat plate to improve the comfort level of sitting. Some wheelchairs also have a back cushion used in cooperation with the cushion, and the back of the wheelchair rider leans on the back cushion, further improving the comfort level of sitting.

[0003] Because the wheelchair rider is tall, fat or wears more clothes, the originally suitable back cushion and cushion are no longer suitable, at which time a larger back cushion and cushion need to be replaced, and in order to be able to accommodate the larger back cushion and cushion, the seat width of the wheelchair needs to be adjusted to be wider to adapt to the new back cushion and cushion. SUMMARY

[0004] The technical problem to be solved by the present application is how to make the seat width of the wheelchair adjustable so that it can accommodate a larger back cushion and cushion.

[0005] To solve the technical problem, the present application provides a wheelchair with adjustable seat width, which comprises a seat frame, the seat frame comprising a seat plate frame and a back frame; the back frame comprising at least one left and one right back support, the left and right sides of the back being fixed on the two back supports respectively; each of the two back supports is connected with the seat plate frame through a connecting support, and the seat frame further comprises at least two groups of first pad blocks and two groups of first fasteners, each of the two connecting supports is fixed on the seat plate frame together with at least one group of first pad blocks in a detachable manner through one group of first fasteners, and the distance between the connecting support and the seat plate frame is increased by one step by moving one group of first pad blocks from the outside of the connecting support to between the connecting support and the seat plate frame; the back support moves with the corresponding connecting support, and the width of the back is adjustable, or the back is detachably fixedly connected with the back support so that the back is replaceable.

[0006] The wheelchair provided by the present application has the characteristics that the adjustment of the seat width of the wheelchair is discontinuous, and the width adjustment or narrowing is determined by the size of the pad blocks in the left-right direction, which makes it easy for the user to adjust the seat width of the wheelchair to the appropriate size according to the specifications of the back cushion and the cushion. The structure based on this adjustment method of moving the position of the pad blocks is also relatively simple and has low manufacturing difficulty, which is beneficial to saving production costs. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figures 1 to 3 is a perspective view of the wheelchair of the first embodiment of the present application, Figure 2 Compared with Figure 1 The cushion and the back cushion are hidden,Figure 3 Compared with Figure 2 The shell hides the right armrest;

[0008] Figures 4 to 6 Respectively Figure 2 The exploded view of A, B and C shown in the figure;

[0009] Figure 7 For Figure 2 The exploded view of C and D shown in the figure;

[0010] Figure 8 For Figure 2 The exploded view of F and F' shown in the figure;

[0011] Figure 9 And Figure 10 Respectively Figure 1 The perspective view of the core part of the wheelchair before adjustment and after adjustment of one gear of width;

[0012] Figure 11 The perspective view of the core part of the wheelchair after adjustment of two gears of width. DETAILED DESCRIPTION Example one

[0013] Referring to Figure 1 A wheelchair, the wheelchair is detachably provided with a seat cushion 100 and a back cushion 200, and after the seat cushion 100 and the back cushion 200 are removed, the wheelchair is as shown in Figure 2 .

[0014] Referring to Figure 2 and 3 In order to better adapt to seat cushions 100 and back cushions 200 of different sizes, the adjustment of the seat width of the wheelchair involves six positions or seven positions on each side, the seven positions A to G on the left side of the wheelchair are marked in Figure 2 , the seven positions A' to G' on the right side of the wheelchair are marked in Figure 3 , the structures of the seven positions A to G on the left side of the wheelchair and the structures of the seven positions A' to G' on the right side of the wheelchair are mirror-symmetrical, Figure 3 In order to better show the structure at B', a part of the shell for improving the appearance is hidden. The adjustment method of A to G will be described one by one below. Figures 4 to 8

[0015] Referring to Figure 4 ​, A structure at the position of the footrest realizes the adjustment of the position of the footrest, the footrest body 300 is installed on the connecting piece 4, the connecting piece 4 is inserted on the seat plate frame 1, the seat plate frame 1 and the connecting piece 4 are locked and fixed through the second locking assembly composed of the locking screw 42 and the locking block 41, the locking block 41 is embedded in the track 43 of the connecting piece 4, and the locking screw 42 is inserted into the seat plate frame 1 and is in threaded connection with the locking block 41. By slightly loosening the locking screw 42, the locking block 41 is loosened, the locking is released, and the relative movement between the locking block 41 and the track 43 can occur, so that the connecting piece 4 can move left and right relative to the seat plate frame 1. In order to prevent the connecting piece 4 from being pulled out of the seat plate frame 1, a limiting block 44 for blocking the locking block 41 is further fixed in the track 43, and after the connecting piece 4 is pulled out to a certain position, the limiting block 44 will block the limiting block 44. In other embodiments of the application, the position of the footrest can be designed to be non-adjustable, and sufficient allowance is designed at the time of design, so that the footrest will not interfere with the largest size of the cushion 100.

[0016] Referring to Figure 5 , B structure realizes the adjustment of the position of the armrest, the armrest includes an armrest body 400, an adjusting assembly 5 and an outer shell 53, the adjusting assembly 5 is installed on the armrest body 400, and the outer shell 53 wraps the adjusting assembly 5. The outer shell 53 is composed of two upper and lower parts and a rear cover 531, and the two upper and lower parts of the outer shell 53 are fixedly connected with the adjusting assembly 5 in a detachable manner. The armrest is fixed on the seat plate frame 1 in a detachable manner through a group of third fasteners and two groups of third pads, one group of third pads includes two third pads 51 arranged oppositely, and one group of third fasteners includes four screws 52. By moving one group of third pads from the outside of the adjusting assembly 5 in the outer shell 53 to between the outer rear cover 531 and the seat plate frame 1, the distance between the armrest and the seat plate frame 1 is increased by one step.

[0017] It can be seen that the third pad 51 is provided with a "U"-shaped through slot matched with the screw 52, the screw 52 passes through the third pad 51 through the "U"-shaped through slot, and the third pad 51 can be disassembled in a direction perpendicular to the axis of the screw 52. Before adjusting the position of the armrest, the screws for fixing the outer shell 53 on the adjusting assembly 5 are disassembled, the two upper and lower parts of the outer shell 53 are separated, the adjusting assembly 5, the third pad 51 and the screw 52 are exposed, the screw 52 is slightly loosened, the third pad 51 is loosened, one group or two groups of third pads can be disassembled, the armrest is moved, the relative positional relationship between the armrest and the two groups of third pads is changed (for example, one group of third pads 51 is moved to between the rear cover 531 and the seat plate frame 1), and each screw 52 is locked again, so that the adjustment of the position of the armrest is completed. In other embodiments of the application, the position of the armrest can be designed to be non-adjustable, and sufficient allowance is designed at the time of design, so that the armrest will not interfere with the largest size of the cushion 100.

[0018] Referring to Figure 6The adjustment of the position of the connecting bracket 3 is realized at C. The connecting bracket 3 is detachably fixed on the seat frame 1 by a set of first fasteners including four screws 32 and a set of first pads including two first pads 31 arranged oppositely. The distance between the connecting bracket 3 and the seat frame 1 is increased by one step by exchanging the set of first pads from outside the connecting bracket 3 to between the connecting bracket 3 and the seat frame 1.

[0019] The connecting brackets 3 and 3' are used to connect the seat frame 1 and the back frame 2. The seat frame 1 is basically in a square structure, and the seat 11 is fixed on the seat frame 1. The back frame 2 includes at least two back brackets 21 and 21' arranged symmetrically, and the two back brackets 21 and 21' are connected to the seat frame 1 by the connecting brackets 3 and 3' respectively. Since the back brackets 21 and 21' move with the connecting brackets 3 and 3' respectively, the left and right sides of the back 500 are detachably fixed on the two back brackets 21 and 21' respectively, so that the back 500 can be replaced to adapt to the change of the distance between the two back brackets 21 and 21'. In other embodiments of the present application, a back with adjustable width can also be used, so that the back does not need to be fixedly connected to the back bracket in a detachable manner.

[0020] In addition to the first pads 31 and the screws 32, C also involves a set of positioning pins including four positioning pins 33 and a set of decorative covers including two decorative covers 34. The positioning pins 33 mainly make the structure at C more stable, and also facilitate the installation of the connecting bracket 3 and the first pads 31. The decorative covers 34 are used for decoration.

[0021] Referring to Figure 7 The back frame 2 also includes an upper cross bar 22 and a lower cross bar 23. The presence of the upper cross bar 22 and the lower cross bar 23 can improve the stability of the structure of the back frame 2, and also provide installation positions for headrests, gas springs, etc. D and E are respectively used to adjust the positions of the back brackets 21 relative to the lower cross bar 23 and the upper cross bar 22 to adapt to the adjustment at C.

[0022] At D, the lower crossbar 23 is detachably fixed to the two sets of second pads on the corresponding backrest support 21 by a set of second fasteners, which includes a screw 232, and a set of second pads, which includes a second pad 231, the second pad 231 having the same size in the left-right direction as the first pad 31, and the distance between the lower crossbar 23 and the backrest support 21 is increased by one step to adapt to the outward movement of the backrest support 21. The third pad 51 mentioned at B has the same size in the left-right direction as the first pad 31, so that the sizes of B, C and D can be uniformly changed to adapt to the size changes of the back cushion 200 and the seat cushion 100.

[0023] At E, the end of the upper crossbar 22 passes through the backrest support 21, which is provided with a first locking assembly, and after the first locking assembly is unlocked, the backrest support 21 can move left and right along the upper crossbar 22 to adapt to the displacement of the backrest support 21 caused by the adjustment at C. The first locking assembly includes two screws 221 and corresponding two nuts. The backrest support 21 mainly consists of three parts, namely a vertical rod substantially in the up-down direction and two extension frames respectively arranged at the two ends of the vertical rod, and the extension frame at the upper end of the vertical rod consists of two parts connected together by the first locking assembly. By loosening or tightening the screws 221, the tightness of the two parts clamping the upper crossbar 22 can be adjusted, and after loosening, the backrest support 21 can move relative to the upper crossbar 22.

[0024] The adjustment mode of moving pads is adopted at B, C and D, and the specific structures of the pads at the three places are different. Those skilled in the art can select the same or different pad structures for the three places when implementing the present application according to needs.

[0025] Referring to Figure 8 and 9 , the adjustment of the wheel position is realized at F. The seat frame 1 is installed on the base frame 6, which is located below the seat frame 1, and the two wheels 600 and 600' are respectively located on the left and right sides of the base frame 6. At F, the wheel 600 is installed on the wheel seat 61 (see Figure 3), the wheel seat 61 is fixed on the mounting seat 62 by two fourth fasteners (screws 63), the mounting seat 62 is fixed on the base frame 6, the coupling surface of the wheel seat 61 and the mounting seat 62 is a wave surface along the left-right direction, so as to increase the resistance to be overcome when the wheel seat 61 and the mounting seat 62 move relative to each other along the left-right direction. After the fourth fasteners are unlocked, the wheel seat 61 can move relative to the mounting seat 62, so that the distance between the wheel 600 and the base frame 6 can be adjusted to adapt to the size change of the wheelchair occupant. A strip-shaped hole 611 is arranged on the wheel seat 61 corresponding to the fourth fastener, the fourth fastener passes through the strip-shaped hole 611 and is screwed with the mounting seat 62, and the strip-shaped hole 611 and the fourth fastener cooperate to guide the left-right movement of the wheel seat 61 relative to the mounting seat 62.

[0026] The left and right wheel seats 61, 61' are connected by a strip-shaped connecting piece 64, so as to ensure the consistency of the positions of the two wheels 600, 600' in the front-rear direction.

[0027] The wheelchair further comprises two brake assemblies 65, 65', which are respectively arranged on the left and right sides of the base frame 6. The wheelchair occupant rotates the handle of the brake assembly 65, 65', so that the brake lever of the brake assembly 65, 65' abuts against the wheel 600, 600', and the brake is realized. Referring to Figure 9 and 10 , the adjustment of the position of the brake assembly is realized at G. The brake assembly 65 is fixed on the base frame 6 in a detachable manner by three fifth fasteners (screws 651) together with the fourth pads 652a, 652b. The fourth pad 652a passes through two screws 651, and the fourth pad 652b passes through one screw 651. By moving the fourth pads 652a, 652b from the outside of the brake assembly 65 into the space between the brake assembly 65 and the base frame 6, the distance between the brake assembly 65 and the base frame 6 is increased by one notch. Although the position of the brake assembly 65 in this embodiment has only two notches, and the position of the wheel seat 61 has three notches, the length of the brake lever is sufficient. When the wheel seat 61 is adjusted outward by one notch from the position shown in Figure 9 to the position shown in Figure 10 , the brake assembly 65 is also adjusted outward by one notch from the position shown in Figure 9 to the position shown in Figure 10 . When the wheel seat 61 is adjusted outward by one notch from the position shown in Figure 10 to the position shown in Figure 11 , the position of the brake assembly 65 is not adjusted.

[0028] Figure 10 Compared with Figure 9 , the positions of the six places A, C to G on the left side of the wheelchair and the six places A', C' to G' on the right side of the wheelchair are all adjusted outward by one notch, and the backrest 500 is replaced by a wider Embodiment Two

[0029] The wheelchair of the present embodiment is different from that of Embodiment 1 in the backrest. Referring to Figure 11 The backrest 500-1 of the wheelchair of the present embodiment is adjustable in width. The backrest 500-1 is divided into left and right pieces, and a buckle and a strap are arranged on each of the left and right pieces. The strap is inserted into the buckle, and the buckle is pressed to fix the strap.

Claims

1. An adjustable seat width wheelchair, comprising a seat frame, the seat frame comprising a seat plate frame (1) and a backrest frame (2); the backrest frame (2) comprising at least one left and one right backrest support (21), the left and right sides of a backrest (500) being fixed to the two backrest supports (21) respectively; characterized in that: Two backrest supports (21) are connected with the seat frame (1) through a connecting support (3) respectively, the seat frame further comprises at least two groups of first pads (31) and two groups of first fasteners (32), the two connecting supports (3) are fixed on the seat frame (1) through a group of first fasteners (32) and at least one group of first pads (31) respectively in a detachable manner, the interval between the connecting support (3) and the seat frame (1) is enlarged by one step by moving one group of first pads (31) from the outside of the connecting support (3) to the interval between the connecting support (3) and the seat frame (1); the backrest support (21) moves with the corresponding connecting support (3), the width of the backrest (500) is adjustable, or the backrest (500) is detachably connected with the backrest support (21) so that the backrest (500) is replaceable.

2. The wheelchair of claim 1, wherein: The backrest frame (2) further comprises a lower cross bar (23), at least two groups of second pads (231) and two groups of second fasteners (232), the number of groups of the second pads (231) and the size in the left-right direction are the same as those of the first pads (31); the lower cross bar (23) is arranged between the two backrest supports (21) and in the left-right direction; the left and right ends of the lower cross bar (23) are fixed on the corresponding backrest support (21) through a group of second fasteners (232) and at least one group of second pads (231) in a detachable manner, the interval between the lower cross bar (23) and the backrest support (21) is enlarged by one step by moving one group of second pads (231) from the outside of the backrest support (21) to the interval between the backrest support (21) and the lower cross bar (23).

3. The wheelchair of claim 1 or 2, wherein: The backrest frame (2) further comprises an upper cross bar (22), the upper cross bar (22) is arranged in the left-right direction, and the left and right ends of the upper cross bar (22) pass through the two backrest supports (21) respectively; the backrest support (21) is provided with a first locking assembly, and the backrest support (21) can move left and right along the upper cross bar (22) after the locking of the first locking assembly is released.

4. The wheelchair of claim 1, wherein: The wheelchair further comprises two armrests, at least two groups of third pads (51) and two groups of third fasteners (52), the two armrests are respectively located on the left and right sides of the seat frame (1), and each is fixed on the seat frame (1) through a group of third fasteners (52) and at least one group of third pads (51) in a detachable manner, the interval between the armrest and the seat frame (1) is enlarged by one step by moving one group of third pads (51) from the outside of the armrest to the interval between the armrest and the seat frame (1).

5. The wheelchair of claim 3, wherein: The wheelchair further comprises two armrests, at least two groups of third pads (51) and two groups of third fasteners (52), the two armrests are respectively located on the left and right sides of the seat frame (1), and each is fixed on the seat frame (1) through a group of third fasteners (52) and at least one group of third pads (51) in a detachable manner, the interval between the armrest and the seat frame (1) is enlarged by one step by moving one group of third pads (51) from the outside of the armrest to the interval between the armrest and the seat frame (1).

6. The wheelchair of claim 4, wherein: The third fastener (52) is a screw, and the third cushion block (51) is provided with a U-shaped through slot matched with the third fastener (52), the third fastener (52) passes through the third cushion block (51) through the U-shaped through slot, so that the third cushion block (51) can be disassembled along the direction perpendicular to the axis of the third fastener (52).

7. The wheelchair of claim 5, wherein: The third fastener (52) is a screw, and the third cushion block (51) is provided with a U-shaped through slot matched with the third fastener (52), the third fastener (52) passes through the third cushion block (51) through the U-shaped through slot, so that the third cushion block (51) can be disassembled along the direction perpendicular to the axis of the third fastener (52).

8. The wheelchair of claim 1, wherein: The wheelchair further comprises a base frame (6), two wheels (600), two wheel seats (61) and two mounting seats (62), the seat plate frame (1) is mounted on the base frame (6), the base frame (6) is located below the seat plate frame (1), and the two wheels (600) are respectively located on the left and right sides of the base frame (6); the wheel (600) is mounted on the wheel seat (61), the wheel seat (61) is fixed on the mounting seat (62) through the fourth fastener (63), and the mounting seat (62) is fixed on the base frame (6); after the locking of the fourth fastener (63) is released, the wheel seat (61) can move relative to the mounting seat (62), so that the distance between the wheel (600) and the base frame (6) can be adjusted; the coupling surface of the wheel seat (61) and the mounting seat (62) is a wave surface along the left and right directions, so as to increase the resistance required to be overcome when the wheel seat (61) and the mounting seat (62) are relatively displaced in the left and right directions.

9. The wheelchair of claim 4, wherein: The wheelchair further comprises a base frame (6), two wheels (600), two wheel seats (61) and two mounting seats (62), the seat plate frame (1) is mounted on the base frame (6), the base frame (6) is located below the seat plate frame (1), and the two wheels (600) are respectively located on the left and right sides of the base frame (6); the wheel (600) is mounted on the wheel seat (61), the wheel seat (61) is fixed on the mounting seat (62) through the fourth fastener (63), and the mounting seat (62) is fixed on the base frame (6); after the locking of the fourth fastener (63) is released, the wheel seat (61) can move relative to the mounting seat (62), so that the distance between the wheel (600) and the base frame (6) can be adjusted; the coupling surface of the wheel seat (61) and the mounting seat (62) is a wave surface along the left and right directions, so as to increase the resistance required to be overcome when the wheel seat (61) and the mounting seat (62) are relatively displaced in the left and right directions.

10. The wheelchair of claim 5, wherein: The wheelchair further comprises a base frame (6), two wheels (600), two wheel seats (61) and two mounting seats (62), the seat frame (1) is mounted on the base frame (6), the base frame (6) is below the seat frame (1), and the two wheels (600) are respectively located on the left and right sides of the base frame (6); the wheel (600) is mounted on the wheel seat (61), the wheel seat (61) is fixed on the mounting seat (62) through the fourth fastener (63), and the mounting seat (62) is fixed on the base frame (6); after the locking of the fourth fastener (63) is released, the wheel seat (61) can move relative to the mounting seat (62), so that the distance between the wheel (600) and the base frame (6) can be adjusted; the coupling surface of the wheel seat (61) and the mounting seat (62) is a wave surface along the left and right directions, so that the resistance required to be overcome by the relative displacement of the wheel seat (61) and the mounting seat (62) in the left and right directions is increased.

11. The wheelchair of claim 8, wherein: The fourth fastener (63) is a screw, the wheel seat (61) is provided with a strip-shaped hole (611) corresponding to the fourth fastener (63), the fourth fastener (63) passes through the strip-shaped hole (611) and is threadedly connected with the mounting seat (62), the strip-shaped hole (611) and the fourth fastener (63) are matched, and the strip-shaped hole (611) has the function of guiding the left and right movement of the wheel seat (61) relative to the mounting seat (62).

12. The wheelchair of claim 9, wherein: The fourth fastener (63) is a screw, the wheel seat (61) is provided with a strip-shaped hole (611) corresponding to the fourth fastener (63), the fourth fastener (63) passes through the strip-shaped hole (611) and is threadedly connected with the mounting seat (62), the strip-shaped hole (611) and the fourth fastener (63) are matched, and the strip-shaped hole (611) has the function of guiding the left and right movement of the wheel seat (61) relative to the mounting seat (62).

13. The wheelchair of claim 10, wherein: The fourth fastener (63) is a screw, the wheel seat (61) is provided with a strip-shaped hole (611) corresponding to the fourth fastener (63), the fourth fastener (63) passes through the strip-shaped hole (611) and is threadedly connected with the mounting seat (62), the strip-shaped hole (611) and the fourth fastener (63) are matched, and the strip-shaped hole (611) has the function of guiding the left and right movement of the wheel seat (61) relative to the mounting seat (62).

14. The wheelchair of claim 8, wherein: The wheelchair further comprises two brake assemblies (65), two groups of fifth fasteners (651) and at least two groups of fourth pads (652a, 652b), the two brake assemblies (65) are respectively located on the left and right sides of the base frame (6), and each is detachably fixed on the base frame (6) together with at least one group of fourth pads (652a, 652b) through a group of fifth fasteners (651); by moving one group of fourth pads (652a, 652b) from the outside of the brake assembly (65) into the brake assembly (65) and the base frame (6), the distance between the brake assembly (65) and the base frame (6) is increased by one step.

15. The wheelchair of claim 9, wherein: The wheelchair further comprises two brake assemblies (65), two groups of fifth fasteners (651) and at least two groups of fourth pads (652a, 652b), the two brake assemblies (65) are respectively located on the left and right sides of the base frame (6), and each is fixed on the base frame (6) in a detachable manner together with at least one group of fourth pads (652a, 652b) through a group of fifth fasteners (651), and the distance between the brake assembly (65) and the base frame (6) is increased by one step by moving a group of fourth pads (652a, 652b) from the outside of the brake assembly (65) to between the brake assembly (65) and the base frame (6).

16. The wheelchair of claim 10, wherein: The wheelchair further comprises two brake assemblies (65), two groups of fifth fasteners (651) and at least two groups of fourth pads (652a, 652b), the two brake assemblies (65) are respectively located on the left and right sides of the base frame (6), and each is fixed on the base frame (6) in a detachable manner together with at least one group of fourth pads (652a, 652b) through a group of fifth fasteners (651), and the distance between the brake assembly (65) and the base frame (6) is increased by one step by moving a group of fourth pads (652a, 652b) from the outside of the brake assembly (65) to between the brake assembly (65) and the base frame (6).

17. The wheelchair of claim 1, wherein: The wheelchair further comprises two footrests, each footrest comprising a footrest body (300) and a connecting piece (4), the footrest body (300) being mounted on the connecting piece (4); the two connecting pieces (4) are respectively inserted into the seat plate frame (1) from the left and right sides of the seat plate frame (1), and the seat plate frame (1) and the connecting piece (4) are locked and fixed through a second locking assembly, and after the locking of the second locking assembly is released, the connecting piece (4) can move left and right relative to the seat plate frame (1).

18. The wheelchair of claim 8, wherein: The wheelchair further comprises two footrests, each footrest comprising a footrest body (300) and a connecting piece (4), the footrest body (300) being mounted on the connecting piece (4); the two connecting pieces (4) are respectively inserted into the seat plate frame (1) from the left and right sides of the seat plate frame (1), and the seat plate frame (1) and the connecting piece (4) are locked and fixed through a second locking assembly, and after the locking of the second locking assembly is released, the connecting piece (4) can move left and right relative to the seat plate frame (1).

19. The wheelchair of claim 9, wherein: The wheelchair further comprises two footrests, each footrest comprising a footrest body (300) and a connecting piece (4), the footrest body (300) being mounted on the connecting piece (4); the two connecting pieces (4) are respectively inserted into the seat plate frame (1) from the left and right sides of the seat plate frame (1), and the seat plate frame (1) and the connecting piece (4) are locked and fixed through a second locking assembly, and after the locking of the second locking assembly is released, the connecting piece (4) can move left and right relative to the seat plate frame (1).

20. The wheelchair of claim 10, wherein: The wheelchair further comprises two footrests, each of which comprises a footrest body (300) and a connecting piece (4), the footrest body (300) being mounted on the connecting piece (4); the two connecting pieces (4) are respectively inserted into the seat plate frame (1) from the left and right sides of the seat plate frame (1), and the seat plate frame (1) and the connecting piece (4) are locked and fixed through a second locking assembly; after the locking of the second locking assembly is released, the connecting piece (4) can move left and right relative to the seat plate frame (1).

21. The wheelchair of claim 17, wherein: The second locking assembly comprises a locking screw (42) and a locking block (41), the locking block (41) is embedded on the connecting piece (4), and the locking screw (42) is inserted into the seat plate frame (1) and is in threaded connection with the locking block (41).

22. The wheelchair of claim 18, wherein: The second locking assembly comprises a locking screw (42) and a locking block (41), the locking block (41) is embedded on the connecting piece (4), and the locking screw (42) is inserted into the seat plate frame (1) and is in threaded connection with the locking block (41).

23. The wheelchair of claim 19, wherein: The second locking assembly comprises a locking screw (42) and a locking block (41), the locking block (41) is embedded on the connecting piece (4), and the locking screw (42) is inserted into the seat plate frame (1) and is in threaded connection with the locking block (41).

24. The wheelchair of claim 20, wherein: The second locking assembly comprises a locking screw (42) and a locking block (41), the locking block (41) is embedded on the connecting piece (4), and the locking screw (42) is inserted into the seat plate frame (1) and is in threaded connection with the locking block (41).

25. The wheelchair of claim 1, wherein: The seat plate frame (1) is provided with a positioning pin (33) corresponding to the first pad block (31), the positioning pin (33) passes through the connecting bracket (3) and the first pad block (31), and has a positioning effect on the installation of the first pad block (31) and the connecting bracket (3).

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