Pedal angle adjustable wheelchair

Abstract

The utility model relates to a wheelchair technical field, concretely relates to a kind of wheelchair with adjustable pedal angle, including wheelchair body, the connecting rod is fixedly connected in wheelchair body side, the adjusting mechanism is assembled in the connecting rod outer wall, the adjusting mechanism includes sleeve, the sleeve is movably sleeved in the connecting rod arc surface outer wall, the footboard is fixedly connected in the sleeve back, the sleeve side is provided with jack, the first connecting plate is fixedly connected in the connecting rod arc surface outer wall, the plug rod is fixedly connected in the first connecting plate side, the second connecting plate is slidably connected in the connecting rod arc surface outer wall, the spring is movably sleeved in the connecting rod arc surface outer wall. The utility model is matched by thirty-four groups of jack and plug rod, provides dense gear selection, compared with the fixed angle or two to three gear coarse adjustment of traditional wheelchair, realizes fine adjustment, spring automatic reset, so that the adjusting process does not need tool.

Description

Technical Field

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

[0002] Wheelchairs are an important tool for rehabilitation. They are not only a means of transportation for people with physical disabilities, but more importantly, they enable them to exercise and participate in social activities.

[0003] Patent document CN219230434U discloses an adjustable wheelchair footrest, including a footrest tube and a foot pedal. The footrest tube is a V-shaped tube with an obtuse angle. A main footrest sleeve is fitted onto one side of the footrest tube, and the main footrest sleeve is fixed to the wheelchair via a footrest connector. The main footrest sleeve and the footrest connector are hinged together. An adjusting footrest tube is fitted onto the other side of the footrest tube, and a foot pedal is installed above the adjusting footrest tube. The overall structure of the wheelchair footrest consists of a frame composed of two adjusting tubes. The main footrest sleeve has three hinge holes, which can be used to adjust the height of the wheelchair footrest by changing the installation position of the hinge holes. When hinged, the angle of the entire footrest can be adjusted simultaneously. The adjusting footrest tube is fixed by nuts and set screws. Loosening the set screws by using a Phillips head handle can adjust the fore-and-aft position of the footrest, thereby allowing the patient to achieve a more comfortable position.

[0004] Although the aforementioned application documents show that the height of the wheelchair footrest can be adjusted by changing the installation position of the hinge hole, and the angle of the entire footrest can be adjusted at the same time when hinged, only a limited number of angle options are available. This makes it impossible to achieve fine-tuning that best meets the user's current needs, thus compromising comfort and adaptability.

[0005] Therefore, a wheelchair with adjustable pedal angle is proposed to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a wheelchair with an adjustable pedal angle, solving the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: including a wheelchair body, wherein a connecting rod is fixedly connected to the side of the wheelchair body, and an adjustment mechanism is assembled on the outer wall of the connecting rod; The adjusting mechanism includes a sleeve that is movably fitted onto the outer wall of the arc-shaped surface of the connecting rod. A foot pedal is fixedly connected to the back of the sleeve, and an insertion hole is provided on the side of the sleeve. A first connecting plate is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod, and an insertion rod is fixedly connected to the side of the first connecting plate. A second connecting plate is slidably connected to the outer wall of the arc-shaped surface of the connecting rod. A spring is movably fitted onto the outer wall of the arc-shaped surface of the connecting rod, and a third connecting plate is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod. A locking component is assembled on the top of the connecting rod.

[0008] Preferably, the side of the socket has a rounded corner to facilitate the insertion of the plug rod, and there are a total of thirty-four plug rods and thirty-four sockets.

[0009] Preferably, the spring is fixedly connected to the side of the second connecting plate, and the end of the spring away from the second connecting plate is fixedly connected to the side of the third connecting plate.

[0010] Preferably, the locking component includes a connecting block, which is fixedly connected to the outer wall of the arc-shaped surface of the second connecting plate, and a movable rod is hinged to the inner wall of the connecting block.

[0011] Preferably, a rubber ring is fixedly connected inside the movable rod, and a through hole is formed on the upper surface of the rubber ring.

[0012] Preferably, a vertical rod is fixedly connected to the outer wall of the arc-shaped surface of the third connecting plate, a baffle is fixedly connected to the outer wall of the arc-shaped surface of the vertical rod, and a tapered rod is fixedly connected to the upper surface of the vertical rod.

[0013] Preferably, the rubber ring is deformable, and the size of the bottom of the tapered rod is larger than the size of the through hole.

[0014] Preferably, the side of the second connecting plate abuts against the side of the sleeve.

[0015] Compared with the prior art, this utility model provides a wheelchair with an adjustable pedal angle, which has the following beneficial effects: First, through the combination of thirty-four sets of sockets and rods, it provides a dense selection of gears. Compared with the fixed angle or two to three coarse adjustments of traditional wheelchairs, it achieves fine adjustment. The spring automatically resets, so the adjustment process does not require tools.

[0016] Second, the manual locking component and the spring automatic locking form a double insurance. The cooperation of the rubber ring and the tapered rod prevents accidental unlocking of the sleeve due to accidental contact or external impact, ensuring that the adjusted angle is stable and reliable, and improving the safety of use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of part of the structure of this utility model; Figure 3 This is a front view of part of the structure of this utility model; Figure 4 This is a schematic diagram of the adjustable state structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Wheelchair body; 2. Connecting rod; 3. Adjustment mechanism; 31. Sleeve; 32. Foot pedal; 33. Insertion hole; 34. Rounded corner; 35. First connecting plate; 36. Insertion rod; 37. Third connecting plate; 38. Spring; 39. Second connecting plate; 310. Connecting block; 311. Movable rod; 312. Rubber ring; 313. Through hole; 314. Vertical rod; 315. Conical rod; 316. Baffle. Detailed Implementation

[0019] 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.

[0020] Example 1 See Figures 1-5 This embodiment provides a wheelchair with an adjustable pedal angle, including a wheelchair body 1, a connecting rod 2 fixedly connected to the side of the wheelchair body 1, and an adjustment mechanism 3 assembled on the outer wall of the connecting rod 2; The adjusting mechanism 3 includes a sleeve 31, which is movably fitted onto the outer wall of the arc-shaped surface of the connecting rod 2. A foot pedal 32 is fixedly connected to the back of the sleeve 31. An insertion hole 33 is provided on the side of the sleeve 31. A first connecting plate 35 is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod 2. An insertion rod 36 is fixedly connected to the side of the first connecting plate 35. A second connecting plate 39 is slidably connected to the outer wall of the arc-shaped surface of the connecting rod 2. A spring 38 is movably fitted onto the outer wall of the arc-shaped surface of the connecting rod 2. A third connecting plate 37 is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod 2. A locking component is assembled on the top of the connecting rod 2.

[0021] The side of the socket 33 has a rounded corner 34 to facilitate the insertion of the insertion rod 36. The rounded corner 34 on the side of the socket 33 provides a smooth guide surface for the insertion of the insertion rod 36, making the locking process smoother and more reliable. Without this rounded corner 34, the edge of the socket 33 is a sharp right angle. When the insertion rod 36 is inserted back into the socket 33, it must be perfectly concentrically aligned with the socket 33 to enter. If there is a slight deviation, the end of the rod will hit the edge of the hole, causing jamming and locking failure. The rounded corner 34 forms a guiding slope. Even if there is a slight axial or radial deviation between the insertion rod 36 and the socket 33, the end of the insertion rod 36 will slide into the hole along the rounded corner slope, which greatly improves the success rate and smoothness of locking. There are a total of thirty-four insertion rods 36 and thirty-four sockets 33. These thirty-four insertion rods 36 and thirty-four sockets 33 provide 34 locking angles, achieving a very high degree of adjustment precision.

[0022] Spring 38 is fixedly connected to the side of the second connecting plate 39, and the end of spring 38 away from the second connecting plate 39 is fixedly connected to the side of the third connecting plate 37, so that spring 38 is always in a compressed state, thereby providing a continuous thrust to the second connecting plate 39, pointing towards the first connecting plate 35. This thrust is ultimately transmitted to the insertion rod 36, making it always tend to automatically insert into the socket 33. This achieves the function of automatic locking when the user releases the hand. Since the second connecting plate 39 is in contact with the sleeve 31, this thrust will be transmitted through the second connecting plate 39, always pushing the sleeve 31 towards the first connecting plate 35, thereby forcing the insertion rod 36 to have a strong tendency to insert into the socket 33. The user directly pushes the foot pedal 32 axially by hand. Sleeve 31 slides laterally along connecting rod 2. During the sliding process, the insertion hole 33 disengages from the insertion rod 36, achieving mechanical unlocking. At the same time, the end face of sleeve 31 presses against the second connecting plate 39, causing it to move backward together, thereby further compressing spring 38. The user can rotate foot pedal 32 and sleeve 31 to any desired angle. At this time, the compressed spring 38 begins to release energy, pushing the second connecting plate 39 forward to reset. The second connecting plate 39 acts like a piston, pushing sleeve 31 forward, so that the insertion hole 33 on sleeve 31 is re-aligned and fitted onto insertion rod 36. Thanks to the rounded corner 34 on insertion hole 33, even with slight deviations, insertion rod 36 can be smoothly guided into the hole, completing automatic locking.

[0023] In practical use, the above-mentioned device pushes the sleeve 31 to move towards the second connecting plate 39. The sleeve 31 drives the foot pedal 32 to move, and the sleeve 31 drives the insertion hole 33 to slide on the outer wall of the arc-shaped surface of the insertion rod 36. When the insertion hole 33 disengages from the insertion rod 36, the angle between the sleeve 31 and the foot pedal 32 can be adjusted. At the same time, the sleeve 31 will squeeze the second connecting plate 39 during the movement. The second connecting plate 39 moves towards the third connecting plate 37. During the movement of the second connecting plate 39, the spring 38 is squeezed. After the angle between the sleeve 31 and the foot pedal 32 is adjusted, the force of pushing the sleeve 31 is released. The spring 38 drives the second connecting plate 39 to move towards the first connecting plate 35. The second connecting plate 39 then pushes the sleeve 31 and the insertion hole 33 into the outer wall of the arc-shaped surface of the insertion rod 36. Through the rounded corner 34 of the outer wall of the insertion hole 33, the success rate of the insertion rod 36 being inserted into the inner wall of the insertion hole 33 is further improved.

[0024] Example 2 See Figure 5 Based on Embodiment 1, the locking component includes a connecting block 310, which is fixedly connected to the outer wall of the arc-shaped surface of the second connecting plate 39, and a movable rod 311 is hinged to the inner wall of the connecting block 310.

[0025] A rubber ring 312 is fixedly connected inside the movable rod 311, and a through hole 313 is opened on the upper surface of the rubber ring 312.

[0026] A vertical rod 314 is fixedly connected to the outer wall of the arc-shaped surface of the third connecting plate 37. A baffle 316 is fixedly connected to the outer wall of the arc-shaped surface of the vertical rod 314. A tapered rod 315 is fixedly connected to the upper surface of the vertical rod 314. The tapered design of the tapered rod 315, combined with the elasticity of the rubber ring 312, allows the user to use a small amount of force to make the rubber ring 312 slide over the tapered part and automatically lock in the predetermined position by friction and deformation, so as to achieve quick and convenient locking and unlocking. The baffle 316 serves as the ultimate limit to prevent over-operation.

[0027] The rubber ring 312 can deform. The bottom dimension of the tapered rod 315 is larger than the dimension of the through hole 313. The rubber ring 312 must undergo significant deformation to pass through, thereby generating huge frictional force. This ensures that the movable rod 311 will never accidentally come off when not operated by human, thus guaranteeing the absolute safety of the pedal when bearing weight.

[0028] The side of the second connecting plate 39 abuts against the side of the sleeve 31.

[0029] In practical use, before adjusting the angles of the sleeve 31 and the foot pedal 32, push the movable rod 311. The movable rod 311 rotates counterclockwise around the connecting block 310. The rubber ring 312 moves from the bottom to the top of the conical rod 315. Since the rubber ring 312 can deform, it can slide across the outer wall of the conical rod 315, releasing the lock between the second connecting plate 39 and the third connecting plate 37, so that the sleeve 31 can slide and push the second connecting plate 39.

[0030] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0031] 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 wheelchair with an adjustable pedal angle, characterized in that: Includes a wheelchair body (1), a connecting rod (2) is fixedly connected to the side of the wheelchair body (1), and an adjustment mechanism (3) is assembled on the outer wall of the connecting rod (2); The adjusting mechanism (3) includes a sleeve (31), which is movably sleeved on the outer wall of the arc-shaped surface of the connecting rod (2). A foot pedal (32) is fixedly connected to the back of the sleeve (31). An insertion hole (33) is opened on the side of the sleeve (31). A first connecting plate (35) is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod (2). An insertion rod (36) is fixedly connected to the side of the first connecting plate (35). A second connecting plate (39) is slidably connected to the outer wall of the arc-shaped surface of the connecting rod (2). A spring (38) is movably sleeved on the outer wall of the arc-shaped surface of the connecting rod (2). A third connecting plate (37) is fixedly connected to the outer wall of the arc-shaped surface of the connecting rod (2). A locking component is assembled on the top of the connecting rod (2).

2. The wheelchair with adjustable pedal angle according to claim 1, characterized in that: The side of the socket (33) is provided with a rounded corner (34) to facilitate the insertion of the plug rod (36). There are a total of thirty-four plug rods (36) and a total of thirty-four sockets (33).

3. A wheelchair with an adjustable pedal angle according to claim 2, characterized in that: The spring (38) is fixedly connected to the side of the second connecting plate (39), and the end of the spring (38) away from the second connecting plate (39) is fixedly connected to the side of the third connecting plate (37).

4. The wheelchair with adjustable pedal angle according to claim 1, characterized in that: The locking assembly includes a connecting block (310), which is fixedly connected to the outer wall of the arc-shaped surface of the second connecting plate (39), and a movable rod (311) is hinged to the inner wall of the connecting block (310).

5. A wheelchair with an adjustable pedal angle according to claim 4, characterized in that: A rubber ring (312) is fixedly connected inside the movable rod (311), and a through hole (313) is opened on the upper surface of the rubber ring (312).

6. A wheelchair with an adjustable pedal angle according to claim 5, characterized in that: A vertical rod (314) is fixedly connected to the outer wall of the arc-shaped surface of the third connecting plate (37), a baffle (316) is fixedly connected to the outer wall of the arc-shaped surface of the vertical rod (314), and a tapered rod (315) is fixedly connected to the upper surface of the vertical rod (314).

7. A wheelchair with an adjustable pedal angle according to claim 6, characterized in that: The rubber ring (312) is deformable, and the bottom dimension of the tapered rod (315) is larger than the dimension of the through hole (313).

8. A wheelchair with an adjustable pedal angle according to claim 3, characterized in that: The side of the second connecting plate (39) abuts against the side of the sleeve (31).

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