A pedal mechanism for a wheelchair

Abstract

The utility model discloses a kind of pedal mechanism of wheelchair, including wheelchair main body, the pedal is arranged on wheelchair main body, the pedal is connected between wheelchair main body by connecting device, the connecting device includes first connecting rod, second connecting rod and rotary joint, the first connecting rod one end is connected with the wheelchair main body, the first connecting rod other end is connected with the second connecting rod one end by rotary joint, the second connecting rod other end is connected with the pedal, the rotary joint includes mutually matched rotary shaft and rotary sleeve, the rotary shaft is fixedly arranged in the end of the first connecting rod, the rotary sleeve is fixedly arranged in the end of the second connecting rod, the rotary sleeve is set on the rotary shaft outer and can rotate around rotary shaft. The utility model pedal mechanism can flexibly adjust the height and angle of pedal, to adapt to different height, leg length user and different use scene.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to a wheelchair pedal mechanism. Background Technology

[0002] Wheelchairs are commonly used assistive mobility tools for people with mobility impairments. The footrest mechanism, as a crucial component of a wheelchair, is used to place the user's feet, and its structural design directly impacts user comfort and safety. Existing wheelchair footrest mechanisms are typically quite fixed in structure, with inconvenient height and angle adjustments, making it difficult to accommodate users of different heights and leg lengths, as well as different usage scenarios. For example, a fixed footrest can cause inconvenience when getting in and out of the wheelchair, and prolonged use of a footrest at a fixed angle can easily lead to foot fatigue. Utility Model Content

[0003] The purpose of this utility model is to provide a solution to the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pedal mechanism for a wheelchair, comprising a wheelchair body, a pedal disposed on the wheelchair body, the pedal being connected to the wheelchair body via a connecting device, the connecting device comprising a first connecting rod, a second connecting rod, and a rotating joint, one end of the first connecting rod being connected to the wheelchair body, the other end of the first connecting rod being connected to one end of the second connecting rod via the rotating joint, the other end of the second connecting rod being connected to the pedal, the rotating joint comprising a rotating shaft and a rotating sleeve cooperating with each other, the rotating shaft being fixedly disposed at the end of the first connecting rod, the rotating sleeve being fixedly disposed at the end of the second connecting rod, the rotating sleeve being sleeved outside the rotating shaft and capable of rotating around the rotating shaft, and the rotating shaft or the rotating sleeve being provided with a limiting structure for fixing the rotation angle.

[0005] Preferably, the first connecting rod and the second connecting rod are telescopic rods. Both the first connecting rod and the second connecting rod include an inner rod and an outer rod. The inner rod is slidably disposed inside the outer rod, and the outer rod is provided with a locking member for fixing the position of the inner rod.

[0006] Preferably, the limiting structure includes a locking pin, a pull rod, a limiting groove, and a limiting hole. The limiting groove is located on the rotating sleeve, the pull rod is movably installed in the limiting groove, the locking pin is fixedly installed at one end of the pull rod, and a spring is sleeved on the pull rod inside the limiting groove.

[0007] Preferably, the limiting hole is opened on the outer ring of the rotating shaft, and the rotating shaft is evenly distributed in a circle on the rotating shaft, and the position of the limiting hole is aligned with the position of the locking pin.

[0008] Preferably, the locking element is any one of bolt, snap-fit, or knob.

[0009] Preferably, a pivot is provided at the center of the pedal, one end of the pivot is connected to a bolt rod, one end of the bolt rod is threadedly connected to the pivot, and the other end of the bolt rod is fixed with a locking knob.

[0010] Preferably, the upper surface of the pedal is provided with an anti-slip layer, which is made of rubber or silicone material.

[0011] Preferably, the two sides of the pedal are provided with upward-curving guard edges.

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

[0013] 1. By setting a first connecting rod and a second connecting rod, the user can adjust the height and front-to-back distance of the pedal as needed, and fix it with a locking component, which improves the flexibility and applicability of the pedal mechanism, so that users of different heights and leg lengths can find a suitable pedal position and increase the comfort of use.

[0014] 2. By setting a rotating joint, the pedal can be adjusted around the rotating axis and fixed by a limiting structure. This allows the angle of the pedal to be adjusted according to the user's needs, avoiding foot fatigue caused by using a pedal at a fixed angle for a long time, and also making it easier for the user to get in and out of the wheelchair.

[0015] 3. This utility model allows for adjustment of the position of the bolt rod on the rotating shaft by rotating the locking knob, thereby enabling fine adjustment of the angle between the pedal and the wheelchair frame to meet the needs of different users. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a structural schematic diagram of the present invention in another state;

[0018] Figure 3 This is a front structural diagram of the first connecting rod and the second connecting rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the side structure of the pedal of this utility model;

[0020] Figure 5 This utility model Figure 3 Schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Wheelchair body; 2. Pedal; 3. First connecting rod; 4. Second connecting rod; 5. Rotating joint; 6. Rotating shaft; 7. Rotating sleeve; 8. Limiting structure; 9. Inner rod; 10. Outer rod; 11. Locking pin; 12. Pull rod; 13. Limiting groove; 14. Limiting hole; 15. Locking element; 16. Rotating shaft; 17. Bolt rod; 18. Locking knob; 19. Edge protector; 20. Spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution for a wheelchair pedal mechanism: it includes a wheelchair body 1, on which a pedal 2 is provided. The pedal 2 is connected to the wheelchair body 1 via a connecting device. The connecting device includes a first connecting rod 3, a second connecting rod 4, and a rotating joint 5. One end of the first connecting rod 3 is connected to the wheelchair body 1, and the other end of the first connecting rod 3 is connected to one end of the second connecting rod 4 via the rotating joint 5. The other end of the second connecting rod 4 is connected to the pedal 2. The rotating joint 5 includes a rotating shaft 6 and a rotating sleeve 7 that cooperate with each other. The rotating shaft 6 is fixedly disposed at the end of the first connecting rod 3, and the rotating sleeve 7 is fixedly disposed at the end of the second connecting rod 4. The rotating sleeve 7 is sleeved outside the rotating shaft 6 and can rotate around the rotating shaft 6. A limiting structure 8 for fixing the rotation angle is provided on the rotating shaft 6 or the rotating sleeve 7.

[0024] Furthermore, the first connecting rod 3 and the second connecting rod 4 are telescopic rods. Both the first connecting rod 3 and the second connecting rod 4 include an inner rod 9 and an outer rod 10. The inner rod 9 is slidably disposed inside the outer rod 10, and the outer rod 10 is provided with a locking member 15 for fixing the position of the inner rod 9.

[0025] Furthermore, the limiting structure 8 includes a locking pin 11, a pull rod 12, a limiting groove 13, and a limiting hole 14. The limiting groove 13 is located on the rotating sleeve 7. The pull rod 12 is movably installed in the limiting groove 13. The locking pin 11 is fixedly installed at one end of the pull rod 12. A spring 20 is sleeved on the pull rod 12 inside the limiting groove 13.

[0026] Furthermore, the limiting hole 14 is opened on the outer ring of the rotating shaft 6, and the rotating shaft 6 is evenly distributed in a circle on the rotating shaft 6. The position of the limiting hole 14 is aligned with the position of the locking pin 11.

[0027] In this embodiment, the locking pin 11 in the limiting structure 8 is engaged in the limiting hole 14 under the action of the spring 20, thereby fixing the rotation angle. When it is necessary to change the angle of the pedal 2, simply pull the lever 12 to disengage the locking pin 11 from the limiting hole 14, then rotate the pedal 2 to the desired angle, release the lever 12, and the locking pin 11 will be engaged in the limiting hole 14 again under the action of the spring 20, thus fixing the angle.

[0028] Furthermore, the locking element 15 can be any one of bolts, clips, or knobs, allowing users to adjust the length of the telescopic rod as needed.

[0029] Furthermore, a pivot 16 is provided at the center of the pedal 2, one end of the pivot 16 is connected to a bolt rod 17, one end of the bolt rod 17 is threadedly connected to the pivot 16, and the other end of the bolt rod 17 is fixed with a locking knob 18.

[0030] In this embodiment, the locking knob 18 is used to fix the pedal 2 to the wheelchair frame, ensuring the stability and safety of the pedal 2 during use. By rotating the locking knob 18, the position of the bolt rod 17 on the rotating shaft 16 can be adjusted, thereby achieving fine adjustment of the angle between the pedal 2 and the wheelchair frame to meet the needs of different users.

[0031] Furthermore, the upper surface of the pedal 2 is provided with an anti-slip layer made of rubber and silicone materials to increase the friction between the foot and the pedal, prevent the user's foot from slipping, and improve safety.

[0032] Furthermore, the two sides of the pedal 2 are provided with upward-curving guard edges 19, which can limit the foot and prevent the foot from slipping off the sides of the pedal during driving.

[0033] Working Principle: During use, the user can adjust the height, forward / backward movement, and angle of pedal 2 as needed. By adjusting the lengths of the first connecting rod 3 and the second connecting rod 4, i.e., adjusting the sliding position of the inner rod 9 within the outer rod 10, and fixing the inner rod 9 with the locking member 15, the height and forward / backward movement of pedal 2 can be adjusted. Simultaneously, the rotating joint 5 allows the second connecting rod 4 to rotate at a certain angle relative to the first connecting rod 3, and the rotation angle is fixed by the limiting structure 8, thereby adjusting the angle of pedal 2. The locking pin 11 in the limiting structure 8 is engaged in the limiting hole 14 under the action of the spring 20, thus fixing the rotation angle. When it is necessary to change the angle of pedal 2, simply pull the lever 12 to disengage the locking pin 11 from the limiting hole 14, then rotate pedal 2 to the desired angle, release the lever 12, and the locking pin 11 will re-engage in the limiting hole 14 under the action of the spring 20, completing the angle fixation.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pedal mechanism for a wheelchair, comprising a wheelchair body (1), characterized in that: The wheelchair body (1) is provided with a footboard (2). The footboard (2) is connected to the wheelchair body (1) through a connecting device. The connecting device includes a first connecting rod (3), a second connecting rod (4), and a rotating joint (5). One end of the first connecting rod (3) is connected to the wheelchair body (1). The other end of the first connecting rod (3) is connected to one end of the second connecting rod (4) through the rotating joint (5). The other end of the second connecting rod (4) is connected to the footboard (2). The rotating joint (5) includes a rotating shaft (6) and a rotating sleeve (7) that cooperate with each other. The rotating shaft (6) is fixedly set at the end of the first connecting rod (3). The rotating sleeve (7) is fixedly set at the end of the second connecting rod (4). The rotating sleeve (7) is sleeved outside the rotating shaft (6) and can rotate around the rotating shaft (6). The rotating shaft (6) or the rotating sleeve (7) is provided with a limiting structure (8) for fixing the rotation angle.

2. The pedal mechanism for a wheelchair according to claim 1, characterized in that, The first connecting rod (3) and the second connecting rod (4) are telescopic rods. Both the first connecting rod (3) and the second connecting rod (4) include an inner rod (9) and an outer rod (10). The inner rod (9) is slidably disposed inside the outer rod (10). The outer rod (10) is provided with a locking member (15) for fixing the position of the inner rod (9).

3. The pedal mechanism for a wheelchair according to claim 2, characterized in that, The limiting structure (8) includes a locking pin (11), a pull rod (12), a limiting groove (13), and a limiting hole (14). The limiting groove (13) is located on the rotating sleeve (7). The pull rod (12) is movably installed in the limiting groove (13). The locking pin (11) is fixedly installed at one end of the pull rod (12). A spring (20) is sleeved inside the limiting groove (13) of the pull rod (12).

4. The pedal mechanism for a wheelchair according to claim 3, characterized in that, The limiting hole (14) is opened on the outer ring of the rotating shaft (6), and the rotating shaft (6) is evenly distributed in a circle on the rotating shaft (6). The position of the limiting hole (14) is aligned with the position of the locking pin (11).

5. The pedal mechanism for a wheelchair according to claim 4, characterized in that, The locking element (15) is any one of bolt, snap-fit ​​or knob.

6. The pedal mechanism for a wheelchair according to claim 5, characterized in that, The pedal (2) has a pivot (16) at its center. One end of the pivot (16) is connected to a bolt rod (17). One end of the bolt rod (17) is threaded to the pivot (16), and the other end of the bolt rod (17) is fixed with a locking knob (18).

7. The pedal mechanism for a wheelchair according to claim 6, characterized in that, The upper surface of the pedal (2) is provided with an anti-slip layer, which is made of rubber and silicone materials.

8. The pedal mechanism for a wheelchair according to claim 7, characterized in that, The two sides of the pedal (2) are provided with upward-curving guard edges (19).

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