A shock-absorbing footrest structure for a wheelchair

Abstract

The utility model discloses a kind of shock-absorbing footrest structures for wheelchair, it is related to wheelchair pedal technical field, including mounting seat, rotatingly installed handle on mounting seat, handle is fixed with pedal seat on, slidingly installed pedal on pedal seat, elastic connecting component is installed between sliding block and back-shaped frame plate, connecting frame is fixed on pedal, and position limiting assembly for locking pedal is installed on connecting frame.The utility model is rotated by the handle set relatively mounting seat, slidingly by the sliding block set relatively back-shaped frame plate, so that spring ring can be elastically deformed, simultaneously under the push of push spring I, friction column and friction plate slide friction, so that the footrest structure can play effective buffering effect when encountering external vibration, effectively weaken the impact of user's foot, and the pedal set can be adjusted relatively pedal seat, realize the adjustment of foot bearing range, so that the comfort of wheelchair is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair pedal technology, specifically a shock-absorbing foot pedal structure for wheelchairs. Background Technology

[0002] A wheelchair is a wheeled chair that helps replace walking. It is an important mobility tool for the injured, sick, and disabled for home rehabilitation, transportation, medical visits, and outdoor activities. Wheelchairs not only meet the mobility needs of people with limb disabilities and limited mobility, but more importantly, they facilitate the movement and care of patients by their families. A wheelchair generally consists of a foldable frame, left and right side panels, front and rear wheels, left and right knee pads and footrests, left and right armrests, handle brakes, seat, and backrest.

[0003] In current wheelchairs, the user's feet are placed on footrests, which support the weight of the user's feet and legs. However, current wheelchair footrests are generally rigidly connected to the wheelchair body and lack effective shock absorption. When the wheelchair encounters bumpy roads, the user's feet will experience significant vibrations. This can cause considerable discomfort or even injury to injured or sick individuals with foot or leg injuries. To address this issue, a shock-absorbing footrest structure for wheelchairs is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a shock-absorbing foot pedal structure for wheelchairs to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A shock-absorbing foot pedal structure for a wheelchair includes a mounting base, a handle rotatably mounted on the mounting base, a pedal seat fixed on the handle, a pedal slidably mounted on the pedal seat, a U-shaped frame plate fixed to the side wall of the handle, a sliding block slidably mounted inside the U-shaped frame plate, a traction rod hinged between the sliding block and the mounting base, an elastic connecting assembly installed between the sliding block and the U-shaped frame plate, a connecting frame fixed on the pedal, and a position limiting assembly for locking the pedal mounted on the connecting frame.

[0007] As an improvement of this utility model: the elastic component includes a guide rod fixed in the U-shaped frame plate, an adjusting frame slidably sleeved on the guide rod, a spring ring sleeved on the guide rod fixed between the adjusting frame and the sliding block, and an adjusting screw threadedly connected to the adjusting frame rotatably installed on the handle, with a screw wheel fixed at the end of the adjusting screw.

[0008] As an improvement of this utility model: a friction plate is fixed on the handle, a guide seat is fixed on the sliding block, a friction column that rubs against the friction plate is slidably installed in the guide seat, and a push spring I is fixed between the friction column and the guide seat.

[0009] As an improvement of this utility model: the position limiting component includes a wedge block slidably mounted on the connecting frame, a push spring II is fixed between the wedge block and the connecting frame, and a number of linearly distributed wedge grooves are equally spaced on the side wall of the pedal, and the wedge block is engaged with the wedge grooves.

[0010] As an improvement of this utility model: the position limiting component further includes a fixing plate fixed to the bottom of the pedal seat, an extension rod fixed on the fixing plate, a sleeve plate fixed to the pedal slidably sleeved on the extension rod, and a connecting spring fixed between the sleeve plate and the fixing plate.

[0011] As an improvement of this utility model: a tie rod is fixedly passed through the side wall of the connecting frame, and one end of the tie rod is fixed to the wedge block.

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

[0013] This invention features a rotating handle that can rotate relative to the mounting base and a sliding block that slides relative to the U-shaped frame plate, allowing the spring coil to deform elastically. Simultaneously, under the pushing action of the push spring I, the friction column slides and rubs against the friction plate, enabling the foot pedal structure to effectively buffer and dampen external vibrations, thus significantly reducing the impact on the user's feet. Furthermore, the pedal can be adjusted relative to the pedal seat to regulate the foot load range, thereby significantly improving the comfort of the wheelchair. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A diagram from a particular perspective;

[0016] Figure 3 This is a partial structural schematic diagram of the present invention;

[0017] Figure 4 This is a schematic diagram showing the connection of components such as the pedal and connecting frame in this utility model;

[0018] Figure 5 This utility model Figure 4 A structural diagram from a certain perspective;

[0019] Figure 6This is a schematic diagram showing the connection of the connecting frame, pull rod, push spring II, and wedge block in this utility model.

[0020] In the diagram: 1-Mounting base, 2-Handle, 3-Traction rod, 4-U-shaped frame plate, 5-Friction plate, 6-Pedal seat, 7-Pedal, 8-Connecting frame, 9-Wedge block, 10-Wedge groove, 11-Adjusting frame, 12-Adjusting screw, 13-Sleeve plate, 14-Fixing plate, 15-Connecting spring, 16-Spring ring, 17-Sliding block, 18-Guide rod, 19-Guide seat, 20-Push spring I, 21-Friction column, 22-Push spring II, 23-Pull rod, 24-Extension rod, 25-Tightening wheel. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to specific embodiments:

[0022] First Embodiment

[0023] Please see Figures 1-6 A shock-absorbing foot pedal structure for a wheelchair includes a mounting base 1, a handle 2 rotatably mounted on the mounting base 1, a foot pedal seat 6 fixed on the handle 2, a foot pedal 7 slidably mounted on the foot pedal seat 6, a U-shaped frame plate 4 fixed to the side wall of the handle 2, a sliding block 17 slidably mounted inside the U-shaped frame plate 4, a traction rod 3 hinged between the sliding block 17 and the mounting base 1, an elastic connecting assembly installed between the sliding block 17 and the U-shaped frame plate 4, a connecting frame 8 fixed on the foot pedal 7, and a position limiting assembly for locking the foot pedal 7 installed on the connecting frame 8.

[0024] The mounting base 1 in this foot pedal structure is connected to the main body of the wheelchair. The footrest 6 and footrest 7 form a bearing area for the user's feet. When the wheelchair moves in a bumpy area, the shock absorption structure formed by the traction rod 3, sliding block 17 and elastic connecting components achieves a shock absorption effect on the footrest 6 and footrest 7, greatly reducing the vibration experienced by the user's feet and improving the comfort of use.

[0025] Specifically, the elastic component in this foot pedal structure includes a guide rod 18 fixed inside the U-shaped frame plate 4, an adjustment frame 11 slidably sleeved on the guide rod 18, a spring ring 16 sleeved on the guide rod 18 fixed between the adjustment frame 11 and the sliding block 17, an adjustment screw 12 threadedly connected to the adjustment frame 11 rotatably mounted on the handle 2, and a screw wheel 25 fixed at the end of the adjustment screw 12.

[0026] With the above settings, when the screw wheel 25 is turned, the screw wheel 25 drives the adjusting screw 12 to rotate. The adjusting screw 12 drives the adjusting bracket 11, which is threaded to it, to slide relative to the guide rod 18, so that the distance between the adjusting bracket 11 and the sliding block 17 is adjusted, that is, the elastic preload of the spring coil 16 can be adjusted, thereby realizing the adjustment effect of the cushioning degree of the pedal seat 6 and the pedal 7, effectively improving the flexibility of this foot pedal structure.

[0027] In addition, a friction plate 5 is fixed on the handle 2, and a guide seat 19 is fixed on the sliding block 17. A friction column 21 that rubs against the friction plate 5 is slidably installed inside the guide seat 19. A push spring 120 is fixed between the friction column 21 and the guide seat 19. When the sliding block 17 slides along the guide rod 18, the guide seat 19 drives the friction column 21 to slide. At this time, the friction column 21 rubs against the friction plate 5, and the handle 2 can rotate smoothly, which further improves the shock absorption effect of this foot pedal structure.

[0028] Second Embodiment

[0029] Please see Figures 1-6 In addition to the first embodiment, the position limiting component in this foot pedal structure includes a wedge 9 slidably mounted on the connecting frame 8. A push spring II22 is fixed between the wedge 9 and the connecting frame 8. A plurality of linearly distributed wedge grooves 10 are equally spaced on the side wall of the pedal 7. The wedge 9 and the wedge grooves 10 are engaged and adapted to each other.

[0030] The position limiting component also includes a fixing plate 14 fixed to the bottom of the pedal seat 6, an extension rod 24 fixed on the fixing plate 14, a sleeve plate 13 fixed to the pedal 7 slidably sleeved on the extension rod 24, and a connecting spring 15 fixed between the sleeve plate 13 and the fixing plate 14.

[0031] Based on the above structural design, by pulling the pedal 7 to slide relative to the pedal seat 6, the pedal seat 6 extends outward and forms a support area for the user's feet together with the pedal seat 6. After the position of the pedal 7 is adjusted, the wedge 9 is engaged in the corresponding wedge groove 10, realizing a quick locking connection between the pedal 7 and the pedal seat 6, effectively ensuring the support stability after the pedal 7 is extended.

[0032] In addition, a pull rod 23 is fixedly inserted through the side wall of the connecting frame 8. One end of the pull rod 23 is fixed to the wedge block 9. By pulling the pull rod 23, the wedge block 9 can be separated from the wedge groove 10. Under the elastic action of the connecting spring 15, the pedal 7 can easily slide in the opposite direction relative to the pedal seat 6 to achieve automatic reset.

[0033] In summary, this utility model features a rotating handle 2 that can rotate relative to the mounting base 1, and a sliding block 17 that slides relative to the U-shaped frame plate 4, allowing the spring coil 16 to elastically deform. Simultaneously, under the pushing action of the pushing spring 120, the friction column 21 slides and rubs against the friction plate 5, enabling the foot pedal structure to effectively buffer and dampen external vibrations, effectively reducing the impact on the user's feet. Furthermore, the pedal 7 can slide and adjust relative to the pedal seat 6, allowing for adjustment of the foot bearing range, thus significantly improving the comfort of the wheelchair.

Claims

1. A shock-absorbing foot pedal structure for a wheelchair, comprising a mounting base (1), a handle (2) rotatably mounted on the mounting base (1), a pedal seat (6) fixed on the handle (2), and a pedal (7) slidably mounted on the pedal seat (6), characterized in that, The side wall of the handle (2) is fixed with a spiral frame plate (4), a sliding block (17) is slidably installed in the spiral frame plate (4), a traction rod (3) is hinged between the sliding block (17) and the mounting base (1), an elastic connecting component is installed between the sliding block (17) and the spiral frame plate (4), a connecting frame (8) is fixed on the pedal (7), and a position limiting component for locking the pedal (7) is installed on the connecting frame (8).

2. The shock-absorbing footrest structure for a wheelchair according to claim 1, characterized in that, The elastic connection assembly includes a guide rod (18) fixed inside the U-shaped frame plate (4), an adjustment frame (11) is slidably sleeved on the guide rod (18), a spring ring (16) sleeved on the guide rod (18) is fixed between the adjustment frame (11) and the sliding block (17), and an adjustment screw (12) threadedly connected to the adjustment frame (11) is rotatably installed on the handle (2), and a screw wheel (25) is fixed at the end of the adjustment screw (12).

3. The shock-absorbing footrest structure for a wheelchair according to claim 2, characterized in that, A friction plate (5) is fixed on the handle (2), and a guide seat (19) is fixed on the sliding block (17). A friction column (21) that rubs against the friction plate (5) is slidably installed in the guide seat (19). A push spring I (20) is fixed between the friction column (21) and the guide seat (19).

4. The shock-absorbing footrest structure for a wheelchair according to claim 1, characterized in that, The position limiting component includes a wedge (9) slidably mounted on the connecting frame (8), a push spring II (22) is fixed between the wedge (9) and the connecting frame (8), and a number of linearly distributed wedge grooves (10) are equally spaced on the side wall of the pedal (7), and the wedge (9) and the wedge grooves (10) are engaged and adapted.

5. A shock-absorbing footrest structure for a wheelchair according to claim 4, characterized in that, The position limiting component also includes a fixing plate (14) fixed to the bottom of the pedal seat (6), an extension rod (24) fixed on the fixing plate (14), a sleeve plate (13) fixed to the pedal (7) slidably sleeved on the extension rod (24), and a connecting spring (15) fixed between the sleeve plate (13) and the fixing plate (14).

6. A shock-absorbing footrest structure for a wheelchair according to claim 4, characterized in that, A pull rod (23) is fixedly inserted through the side wall of the connecting frame (8), and one end of the pull rod (23) is fixed to the wedge block (9).

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