Folding wheelchair
By using two drive devices in the folding wheelchair to drive the seat plate and the front bracket to fold closer and closer to the rear bracket, the problem of complex bracket structure in the prior art is solved, and the effect of simplification of structure and easy use is achieved.
Patent Information
- Application Number
- CN202421145699.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The bracket structure of the existing folding wheelchair is complex and requires multiple linkage mechanisms to achieve folding, resulting in inconvenient use and cumbersome structure.
Two driving devices are used to drive the seat plate and the front bracket to move closer and fold towards the rear bracket, which simplifies the overall structure and reduces the use of the linkage mechanism.
The structure of the folding wheelchair is simplified and easy to use. Through the control of the two drive devices, the folding and unfolding of the wheelchair can be automatically completed.
Smart Images
Figure CN222549503U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a wheelchair, in particular to a folding wheelchair. Background Art
[0002] Wheelchairs are generally large in size, and are usually folded to reduce their size for easy storage. However, in order to reduce costs, existing foldable wheelchairs usually use only one drive device to drive the folding of the entire vehicle, so that the folding frame requires more linkage mechanisms to connect the front wheel support legs, rear wheel support legs, armrests and backrests, etc., making the frame structure of the entire vehicle very complicated. Utility Model Content
[0003] The utility model aims to provide a folding wheelchair which has a simple structure and is easy to use.
[0004] Another object of the utility model is to provide a foldable wheelchair with a simple structure and convenient use.
[0005] The third purpose of the utility model is to provide a foldable wheelchair with simple structure and convenient use.
[0006] In order to achieve the above-mentioned purpose, the folding wheelchair provided by the utility model includes a front bracket, a rear bracket, a seat plate, a first driving device, a second driving device, a first driving member and a second driving member, the front bracket is pivoted relative to the rear bracket; the seat plate is pivoted relative to the rear bracket; one end of the first driving device is pivoted to the rear bracket; the output end of the first driving device is movably arranged and pivoted to one end of the first driving member; the other end of the first driving member is pivoted to the seat plate to drive the seat plate to move closer to the rear bracket; one end of the second driving device is pivoted to the rear bracket; the output end of the second driving device is telescopically arranged and pivoted to one end of the second driving member, and the other end of the second driving member is fixedly connected to the front bracket to drive the front bracket to move closer to the rear bracket.
[0007] Compared with the prior art, the present invention pivotally connects the front support with the rear support, pivotally connects the seat with the rear support, connects the first driving member between the seat plate and the first driving device, connects the second driving member between the front support and the rear support, and then utilizes the first driving device and the second driving device to respectively drive the seat plate and the front support to move closer and fold relative to the rear support; therefore, the present invention utilizes two driving devices to respectively drive the seat plate and the front support of the folding wheelchair, thereby greatly reducing the use of linkage rods or connecting rods as intermediate linkage mechanisms, thereby greatly simplifying the structure of the entire folding wheelchair, making the structure of the folding wheelchair very simple, and the folding wheelchair can be automatically folded by only controlling the two driving devices separately, and it is also very simple and convenient to use.
[0008] Preferably, the pivot axis through which the seat plate is pivotally connected to the rear bracket and the pivot axis through which the front bracket is pivotally connected to the rear bracket are coaxially arranged, which can further simplify the structure of the folding wheelchair.
[0009] Preferably, a seat body is provided at a lower side of the front end of the seat plate, and the seat body is pivotally connected to the rear bracket.
[0010] Preferably, the rear bracket is provided with a slide groove, the output end of the first driving device has a slider, the slider is movably arranged in the slide groove, and one end of the first driving member is pivotally connected to the slider. By using the slide groove to cooperate with the slider, the output end of the first driving device and the support of the first driving member can be made more stable and reliable, so that the seat plate can be firmly and stably supported, thereby improving the safety of riding.
[0011] Preferably, the folding wheelchair further comprises an armrest mechanism, and the armrest mechanism is pivotally connected to the rear bracket.
[0012] Specifically, the armrest mechanism includes a first connecting rod, a second connecting rod and an armrest, the lower end of the first connecting rod is pivotally connected to the rear bracket, the upper end of the first connecting rod is pivotally connected to the armrest, the lower end of the second connecting rod is pivotally connected to the rear bracket, the upper end of the second connecting rod is pivotally connected to the armrest, and a deformable quadrilateral structure is formed among the first connecting rod, the second connecting rod, the armrest and the rear bracket.
[0013] Specifically, the armrest mechanism further includes a locking pin, which is movably disposed between the armrest and one of the first connecting rod and the second connecting rod to lock or release the deformable quadrilateral structure.
[0014] Specifically, an operating handle is pivotally connected to one side of the armrest, and the locking pin is arranged on the operating handle. When the operating handle is flipped up or down, the locking pin can be driven to insert into or leave the insertion hole of one of the first connecting rod and the second connecting rod, thereby locking or releasing the deformable quadrilateral structure.
[0015] Specifically, the pivot axis of the operating handle extends in the front and rear directions of the armrest, a sliding groove is provided on one side of the operating handle, the direction of the sliding groove is along the upper and lower directions of the armrest, and one end of the locking pin is slidably arranged in the sliding groove.
[0016] Specifically, the sliding groove is a T-shaped groove, and the end of the locking pin is a T-shaped head that matches the T-shaped groove; the depth of the T-shaped groove is greater than the thickness of the T-shaped head.
[0017] Specifically, a limiting groove is circumferentially provided on the outer side of one end of the locking pin close to the T-shaped head, and the opening edge of the T-shaped groove is stuck in the limiting groove; the width of the limiting groove is greater than the thickness of the opening edge of the T-shaped groove.
[0018] Specifically, the handrail is provided with a guide hole, the opening diameters of both ends of the guide hole are smaller than the inner diameter of the middle hole, and the locking pin slides through the guide hole.
[0019] Specifically, the armrest mechanism further includes an elastic return member, and the elastic return member is arranged between the locking pin and the armrest.
[0020] Preferably, the second driving member includes a cross bar and connecting seats arranged at both ends of the cross bar, and the connecting seats are provided with connecting flanges, and the connecting flanges are fixedly connected to the front bracket on this side.
[0021] Preferably, the folding wheelchair further comprises a pedal, one end of the pedal is pivotally connected to the lower end of the front bracket, a linkage rod is pivotally connected between the other end of the pedal and the rear bracket, and a variable parallelogram structure is formed between the front bracket, the rear bracket, the pedal and the linkage rod. By providing the linkage rod and the pedal, the pedal can be opened or folded along with the front bracket and the rear bracket, thereby improving the convenience of use.
[0022] A folding wheelchair comprises a front bracket, a rear bracket, a seat plate, a first driving device and a first driving member, wherein the front bracket is connected to the rear bracket; the seat plate is pivotally connected relative to the rear bracket; one end of the first driving device is pivotally connected to the rear bracket; the output end of the first driving device is movably arranged and pivotally connected to one end of the first driving member; the other end of the first driving member is pivotally connected to the seat plate to drive the seat plate to move closer to the rear bracket.
[0023] A folding wheelchair comprises a front bracket, a rear bracket, a second driving device and a second driving member, wherein the front bracket is pivotally connected to the rear bracket; one end of the second driving device is pivotally connected to the rear bracket; the output end of the second driving device is telescopically arranged and pivotally connected to one end of the second driving member, and the other end of the second driving member is fixedly connected to the front bracket to drive the front bracket to move closer to the rear bracket. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural diagram of the folding wheelchair of the first embodiment of the utility model when it is unfolded.
[0025] Figure 2 It is a structural diagram of the second driving member of the folding wheelchair in the first embodiment of the utility model.
[0026] Figure 3 This is a motion state diagram of each rod of the foldable wheelchair of the first embodiment of the utility model when it is folded.
[0027] Figure 4 It is a structural diagram of the armrest mechanism of the folding wheelchair in the first embodiment of the utility model.
[0028] Figure 5 It is a diagram of the internal structure of the armrest mechanism of the folding wheelchair in the first embodiment of the utility model.
[0029] Figure 6 It is an exploded view of the armrest mechanism of the folding wheelchair in the first embodiment of the utility model.
[0030] Figure 7 yes Figure 4 Cross-section along the AA direction.
[0031] Figure 8 yes Figure 7 State diagram of the armrest mechanism when released.
[0032] Fig. 9 This is a diagram of the folding wheelchair of the first embodiment of the utility model after being folded.
[0033] Fig.10 It is a structural diagram of the folding wheelchair of the second embodiment of the utility model when it is unfolded.
[0034] Fig.11 It is a structural diagram of the folding wheelchair of the third embodiment of the utility model when it is unfolded. DETAILED DESCRIPTION
[0035] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.
[0036] like Figure 1As shown, the folding wheelchair 100 of the utility model comprises a front bracket 1, a rear bracket 2, a seat plate 3, a first driving device 4, a second driving device 5, a first driving member 6 and a second driving member 7. The front bracket 1 is pivoted relative to the rear bracket 2 to form a herringbone structure. A front wheel 101 is provided at the lower end of the front bracket 1, and rear wheels 102 are provided at both sides of the lower end of the rear bracket 2. In this embodiment, the number of the front brackets 1 is two, and the number of the rear bracket 2 is one. The two front brackets 1 are pivoted to both sides of the front end of the rear bracket 2. The height of one end of the rear bracket 2 pivoted to the front bracket 1 is greater than the height of the other end of the rear bracket 2; the seat plate 3 is pivoted relative to the rear bracket 2, specifically, the lower side of the front end of the seat plate 3 has a seat body 31, and the seat body 31 is pivoted to the rear bracket 2. One end of the first driving device 4 is pivoted to the rear bracket 2; the output end of the first driving device 4 is movably arranged and pivoted to one end of the first driving member 6; the first driving device 4 is an electric push rod. The other end of the first driving member 6 is pivotally connected to the bottom of the seat plate 3 to drive the seat plate 3 to move closer to the rear bracket 2; the first driving member 6 is a rod; in order to improve the riding comfort of this embodiment, the first driving member 6 can use a spring shock absorber instead of a rod, which can also achieve the same effect. One end of the second driving device 5 is pivotally connected to the rear bracket 2; the output end of the second driving device 5 is telescopically arranged and pivotally connected to one end of the second driving member 7. The second driving device 5 is an electric push rod. The second driving member 7 is a rod, and the other end of the second driving member 7 is fixedly connected to the front bracket 1 to drive the front bracket 1 to move closer to the rear bracket 2.
[0037] Please combine Figure 2 As shown, the pivot axis 1a pivoted between the seat plate 3 and the rear bracket 2 and the pivot axis pivoted between the front bracket 1 and the rear bracket 2 are coaxially arranged. This can further simplify the structure of the folding wheelchair 100. The second driving member 7 includes a cross bar 71 and a connecting seat 72 bent at both ends of the cross bar 71, and the connecting seat 72 is provided with a connecting flange 72a, and the connecting flange 72a is fixedly connected to the front bracket 1 on this side. The cross bar 71 extends a pivot ear 73, and the output end of the second driving device 5 is pivoted to the pivot ear 73 of the cross bar 71. The connecting seat 72 is also provided with a sleeve 74, and the sleeve 74 allows the pivot axis 1a to pass freely. By providing the cross bar 71 and the connecting seat 72, the two connecting seats 72 and the two front brackets 1 are driven simultaneously by one cross bar 71, so that only one second driving device 5 is needed to fold or unfold the two front brackets 1 synchronously, which is more convenient to use.
[0038] Please see again Figure 1The rear bracket 2 is provided with a slide groove 21, the output end of the first driving device 4 has a slider 41, the slider 41 is movably arranged in the slide groove 21, and one end of the first driving member 6 is pivotally connected to the slider 41. By using the slide groove 21 to cooperate with the slider 41, the output end of the first driving device 4 and the support of the first driving member 6 can be made more stable and reliable, so that the seat plate 3 can be firmly and stably supported, and the safety of riding can be improved.
[0039] Please see again Figure 1 and Figure 3 The folding wheelchair 100 further includes an armrest mechanism 8, which is pivotally connected to the rear support 2. Specifically, the armrest mechanism 8 includes a first link 81, a second link 82, and an armrest 83. The lower end of the first link 81 is pivotally connected to the rear support 2, the upper end of the first link 81 is pivotally connected to the armrest 83, the lower end of the second link 82 is pivotally connected to the rear support 2, and the upper end of the second link 82 is pivotally connected to the armrest 83. A deformable quadrilateral structure is formed between the first link 81, the second link 82, the armrest 83, and the rear support 2. The armrest mechanism 8 further includes a locking pin 84, which is movably disposed between the armrest 83 and one of the first link 81 and the second link 82 to lock or release the deformable quadrilateral structure. An operating handle 85 is pivotally connected to one side of the armrest 83, and the locking pin 84 is disposed on the operating handle 85. When the operating handle 85 is flipped, the locking pin 84 can be driven to insert into or leave the insertion hole of one of the first connecting rod 81 and the second connecting rod 82, thereby locking or releasing the deformable quadrilateral structure. In this embodiment, the insertion hole 811 is provided on the first connecting rod 81.
[0040] See also Figures 4 to 7, the pivot axis 85a of the operating handle 85 extends in the front and rear directions of the armrest 83, so that the operating handle 85 can be turned up and down, so as to facilitate manual operation by the user. A sliding groove 851 is provided on the inner side of the operating handle 85, and the direction of the sliding groove 851 is along the up and down directions of the armrest 83. One end of the locking pin 84 is slidably arranged in the sliding groove 851. The lower end of the sliding groove 851 is closed and the upper end is open to facilitate the installation of the locking pin 84. In this way, when the operating handle 85 is turned over and drives the locking pin 84, the locking pin 84 can slide out of the insertion hole 811, thereby ensuring stable operation of locking or releasing. The sliding groove 851 is a T-slot, and the end of the locking pin 84 is a T-head 841 that cooperates with the T-slot. The depth of the T-slot is greater than the thickness of the T-head 841. When the operating handle 85 is turned over, the angle of the locking pin 84 relative to the operating handle 85 will change, and the T-shaped head 841 will swing in the T-shaped slot. Therefore, by making the depth of the T-shaped slot greater than the thickness of the T-shaped head 841, the T-shaped slot can leave enough space for the T-shaped head 841 to swing, preventing the two from interfering with each other and getting stuck. A limiting groove 842 is circumferentially arranged on the outer side of one end of the locking pin 84 close to the T-shaped head 841, and the opening edge of the T-shaped slot is stuck in the limiting groove 842. The limiting groove 842 can limit the length of the locking pin 84 extending out of the operating handle 85, preventing the locking pin 84 from excessively retracting into the T-shaped slot. The width of the limiting groove 842 is greater than the thickness of the opening edge of the T-shaped slot. In this way, enough space can be left for the locking pin 84 to swing relative to the operating handle 85, preventing the two from interfering with each other and getting stuck. The armrest 83 is provided with a guide hole 831, and the opening diameters of both ends of the guide hole 831 are smaller than the inner diameter of the middle hole. The locking pin 84 slides through the guide hole 831, and the outer side of the locking pin 84 is provided with a limiting flange 843 whose diameter is larger than the opening of the guide hole 831 and smaller than the middle hole, and the limiting flange 843 is arranged in the middle hole of the guide hole 831. The armrest mechanism 8 also includes an elastic reset member 86, and the elastic reset member 86 is arranged between the locking pin 84 and the armrest 83. Specifically, the elastic reset member 86 is a compression spring, which is built into the guide hole 831, and one end of the compression spring contacts the limiting flange 843, and the other end contacts the wall of the guide hole 831, so as to provide an elastic force for inserting the locking pin 84 into the insertion hole 811.
[0041] The folding wheelchair 100 further includes a pedal 9, one end of which is pivotally connected to the lower end of the front bracket 1, and a linkage rod 10 is pivotally connected between the other end of the pedal 9 and the rear bracket 2, and a variable parallelogram structure is formed between the front bracket 1, the rear bracket 2, the pedal 9 and the linkage rod 10. By providing the linkage rod 10 and the pedal 9, the pedal 9 can be opened or folded along with the front bracket 1 and the rear bracket 2, thereby improving the convenience of use.
[0042] See also Figure 3 and Fig. 9 In summary, the working principle of the folding wheelchair 100 according to the first embodiment of the present invention is described in detail below:
[0043] When the folding wheelchair 100 needs to be folded, the first driving device 4 is started, and the output end of the first driving device 4 drives the slider 41 to slide backward along the slide slot 21, and the slider 41 drives the first driving member 6, and the first driving member 6 drives the seat plate 3 to be folded around the pivot axis 1a toward the direction of the rear bracket 2. At the same time, the second driving device 5 is started, and the output end of the second driving device contracts, driving the cross bar 71, and the cross bar 71 drives the connecting seat 72 to make the front bracket 1 close to the direction of the rear bracket 2 around the pivot axis 1a. When the front bracket 1 is folded, the pedal 9 is driven to be folded toward the direction of the rear bracket 2 through the linkage rod 10. Finally, the seat plate 3, the front bracket 1 and the rear bracket 2 are folded together. Afterwards, the locking pin 84 is pulled out of the insertion hole to release the deformable quadrilateral structure. At this time, the handle is manually pushed so that the first connecting rod 81 and the second connecting rod 82 are moved toward the direction of the rear bracket 2 and the armrest 83 is folded. At this time, the folding wheelchair 100 can be completely folded. When the folding wheelchair 100 needs to be unfolded, the armrest 83 is operated in the opposite direction, and the first driving device 4 and the second driving device 5 are started at the same time, so that the armrest mechanism 8, the seat plate 3, and the front bracket 1 are unfolded relative to the rear bracket 2.
[0044] Compared with the prior art, the present invention pivotally connects the front bracket 1 with the rear bracket 2, pivotally connects the seat with the rear bracket 2, connects the first driving member 6 between the seat plate 3 and the first driving device 4, connects the second driving member 7 between the front bracket 1 and the rear bracket 2, and then uses the first driving device 4 and the second driving device 5 to respectively drive the seat plate 3 and the front bracket 1 to move closer and fold relative to the rear bracket 2; therefore, the present invention uses two driving devices to respectively drive the seat plate 3 and the front bracket 1 of the folding wheelchair 100, thereby greatly reducing the use of linkage rods or connecting rods as intermediate linkage mechanisms, thereby greatly simplifying the structure of the entire folding wheelchair 100, making the structure of the folding wheelchair 100 very simple, and only needs to control the two driving devices separately to automatically fold the folding wheelchair 100, which is also very simple and convenient to use.
[0045] See also Fig.10 , the figure shows the second embodiment of the utility model. The folding wheelchair 100' of this embodiment comprises a front bracket 1', a rear bracket 2', a seat plate 3', a first driving device 4' and a first driving member 6'. The front bracket 1' is pivoted relative to the rear bracket 2' to form a herringbone structure. In this embodiment, the number of the front brackets 1' is two, and the number of the rear bracket 2' is one. The two front brackets 1' are respectively pivoted to the two sides of the front end of the rear bracket 2'. The height of one end of the rear bracket 2' pivoted to the front bracket 1' is greater than the height of the other end of the rear bracket 2'; the seat plate 3' is pivoted relative to the rear bracket 2'. Specifically, the lower side of the front end of the seat plate 3' has a seat body 31', and the seat body 31' is pivoted to the rear bracket 2'. One end of the first driving device 4' is pivotally connected to the rear bracket 2'; the output end of the first driving device 4' is movably arranged and pivotally connected to one end of the first driving member 6'; a slide groove 21' is provided on the rear bracket 2, and the output end of the first driving device 4 has a slider 41', the slider 41' is movably arranged in the slide groove 21', and one end of the first driving member 6' is pivotally connected to the slider 41'. The first driving device 4' is an electric push rod. The other end of the first driving member 6' is pivotally connected to the bottom of the seat plate 3' to drive the seat plate 3' to move closer to the rear bracket 2'; the first driving member 6' is a rod; in order to improve the riding comfort, the first driving member 6' in this embodiment is a spring shock absorber.
[0046] like Fig.11As shown, the utility model also discloses a third embodiment. The folding wheelchair 200' of this embodiment includes a front bracket 21', a rear bracket 22', a seat plate 23', a second driving device 25' and a second driving member 27'. The front bracket 21' is pivoted relative to the rear bracket 22' to form a herringbone structure. In this embodiment, the number of the front brackets 21' is two, the number of the rear bracket 22' is one, and the two front brackets 21' are pivoted to the two sides of the front end of the rear bracket 22' respectively. The height of one end of the rear bracket 22' pivoted to the front bracket 21' is greater than the height of the other end of the rear bracket 22'; the seat plate 23' is arranged on the rear bracket 22'. One end of the second driving device 25' is pivoted to the rear bracket 22'; the output end of the second driving device 25' is telescopically arranged and pivoted to one end of the second driving member 27'. The second driving device 25' is an electric push rod. The second driving member 27' is a rod, and the other end of the second driving member 27' is fixedly connected to the front bracket 21' to drive the front bracket 21' to move closer to the rear bracket 22'. The structure of the second driving member 27' is the same as that of the second driving member 7 in the first embodiment.
[0047] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.
Claims
1. A folding wheelchair, characterized in that: The present invention comprises a front bracket, a rear bracket, a seat plate, a first driving device, a second driving device, a first driving member and a second driving member, wherein the front bracket is pivoted relative to the rear bracket; the seat plate is pivoted relative to the rear bracket; one end of the first driving device is pivoted to the rear bracket; the output end of the first driving device is movably arranged and pivoted to one end of the first driving member; the other end of the first driving member is pivoted to the seat plate to drive the seat plate to move closer to the rear bracket; one end of the second driving device is pivoted to the rear bracket; the output end of the second driving device is telescopically arranged and pivoted to one end of the second driving member, and the other end of the second driving member is fixedly connected to the front bracket to drive the front bracket to move closer to the rear bracket.
2. The folding wheelchair according to claim 1, characterized in that: The pivot axis through which the seat plate is pivotally connected to the rear bracket and the pivot axis through which the front bracket is pivotally connected to the rear bracket are coaxially arranged.
3. The folding wheelchair according to claim 1, characterized in that: The front lower side of the seat plate is provided with a seat body, and the seat body is pivotally connected to the rear bracket.
4. The folding wheelchair according to claim 1, characterized in that: The rear bracket is provided with a slide groove, the output end of the first driving device is provided with a slider, the slider is movably arranged in the slide groove, and one end of the first driving member is pivotally connected to the slider.
5. The folding wheelchair according to claim 1, characterized in that: The folding wheelchair also includes an armrest mechanism, which is pivotally connected to the rear bracket.
6. The folding wheelchair according to claim 5, characterized in that: The armrest mechanism includes a first connecting rod, a second connecting rod and an armrest, the lower end of the first connecting rod is pivotally connected to the rear bracket, the upper end of the first connecting rod is pivotally connected to the armrest, the lower end of the second connecting rod is pivotally connected to the rear bracket, the upper end of the second connecting rod is pivotally connected to the armrest, and a deformable quadrilateral structure is formed among the first connecting rod, the second connecting rod, the armrest and the rear bracket.
7. The folding wheelchair according to claim 6, characterized in that: The armrest mechanism further includes a locking pin, which is movably disposed between the armrest and one of the first connecting rod and the second connecting rod to lock or release the deformable quadrilateral structure.
8. The folding wheelchair according to claim 7, characterized in that: An operating handle is pivotally connected to one side of the armrest, and the locking pin is arranged on the operating handle. When the operating handle is flipped up or down, the locking pin can be driven to insert into or leave the insertion hole of one of the first connecting rod and the second connecting rod, so as to lock or release the deformable quadrilateral structure.
9. The folding wheelchair according to claim 8, characterized in that: The pivot axis of the operating handle extends in the front and rear directions of the armrest. A sliding groove is provided on one side of the operating handle. The direction of the sliding groove is along the upper and lower directions of the armrest. One end of the locking pin is slidably arranged in the sliding groove.
10. The folding wheelchair according to claim 9, characterized in that: The sliding groove is a T-shaped groove, and the end of the locking pin is a T-shaped head matched with the T-shaped groove; the depth of the T-shaped groove is greater than the thickness of the T-shaped head.
11. The folding wheelchair according to claim 10, characterized in that: A limiting groove is circumferentially provided on the outer side of one end of the locking pin close to the T-shaped head, and the opening edge of the T-shaped groove is stuck in the limiting groove; the width of the limiting groove is greater than the thickness of the opening edge of the T-shaped groove.
12. The foldable wheelchair according to claim 7, characterized in that: The handrail is provided with a guide hole, the opening diameters of both ends of the guide hole are smaller than the inner diameter of the middle hole, and the locking pin slides through the guide hole.
13. The folding wheelchair according to claim 7, characterized in that: The armrest mechanism further comprises an elastic reset member, and the elastic reset member is arranged between the locking pin and the armrest.
14. The folding wheelchair according to claim 1, characterized in that: The second driving member includes a cross bar and connecting seats arranged at both ends of the cross bar, and the connecting seat is provided with a connecting flange, and the connecting flange is fixedly connected to the front bracket on this side.
15. The foldable wheelchair according to claim 1, characterized in that: The folding wheelchair also includes a pedal, one end of which is pivotally connected to the lower end of the front bracket, and a linkage rod is pivotally connected between the other end of the pedal and the rear bracket, and a variable parallelogram structure is formed between the front bracket, the rear bracket, the pedal and the linkage rod.
16. A folding wheelchair, characterized in that: It includes a front bracket, a rear bracket, a seat plate, a first driving device and a first driving member, the front bracket is connected to the rear bracket; the seat plate is pivoted relative to the rear bracket; one end of the first driving device is pivoted to the rear bracket; the output end of the first driving device is movably arranged and pivoted to one end of the first driving member; the other end of the first driving member is pivoted to the seat plate to drive the seat plate to move closer to the rear bracket.
17. A folding wheelchair, characterized in that: It includes a front bracket, a rear bracket, a second driving device and a second driving member, the front bracket is pivotally connected to the rear bracket; one end of the second driving device is pivotally connected to the rear bracket; the output end of the second driving device is telescopically arranged and pivotally connected to one end of the second driving member, and the other end of the second driving member is fixedly connected to the front bracket to drive the front bracket to move closer to the rear bracket.