Wheelchair footrest adjustment structure

Abstract

The utility model relates to wheelchair technical field proposes a kind of wheelchair footboard adjusting structure convenient to use, including wheelchair frame body, the both ends of wheelchair frame body are fixedly connected with mounting seat, and mounting seat is set between two and is provided with pedal assembly, and pedal assembly includes rotating frame, the both ends of rotating frame top portion are respectively rotationally connected with two mounting seats, the both ends of rotating frame are slidably connected with collar, and two collars are fixedly connected with the movable rod of horizontal arrangement between, the middle part of movable rod is fixedly connected with footboard, and the bottom of footboard is provided with the lifting piece for adjusting the height of footboard, the outside of one mounting seat is provided with the positioning member for limiting rotating frame rotation. Through electric push rod control lifting piece realizes the electric adjustment of footboard height, and hand lever operation positioning member completes angle adjustment, whole process does not need user to bend down operation, significantly reduce the risk of falling due to bending down, especially applicable to patients with difficulty in movement or lumbar disease.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, specifically to a user-friendly wheelchair footrest adjustment structure. Background Technology

[0002] Wheelchairs are a means of transportation for people with limb disabilities and limited mobility, enabling them to exercise and participate in social activities. A typical wheelchair consists of four parts: the frame, wheels, brakes, and a seat / backrest. For non-lower limb amputees, to increase comfort, two footrests are installed at the front of the wheelchair via footrest brackets to prevent the feet from dangling. Currently, the footrests are mostly fixed directly to the footrest brackets and cannot be adjusted. Since different users have different comfortable foot positions, the required distance between the footrests and the footrest brackets also varies.

[0003] In this regard, Chinese Patent (Publication No.: CN207370828U) discloses "a depth adjustment mechanism for a wheelchair footrest, including a fixed seat and a sliding seat. The fixed seat is used for fixed installation with a footrest bracket, and the sliding seat is used for fixed installation with the footrest. The sliding seat is installed on the fixed seat in a back-and-forth sliding manner. The sliding seat and the fixed seat are fixed by a detachable fixing device. The fixing device includes at least one bolt and a slider corresponding to the number of bolts. The slider has a threaded hole corresponding to the bolt. One of the fixed seat and the sliding seat has a T-slot, and the other has a through hole. The slider is placed in the T-slot and slides in the T-slot. After the bolt passes through the through hole, it is screwed into the threaded hole of the slider. The fixed seat and the sliding seat are fixed by tightening the bolt."

[0004] However, in the process of implementing the relevant technology, the above-mentioned patent has certain technical defects. For example, when it is necessary to adjust the depth of the foot pedal, the fixing device must be disassembled first, and then the adjustment can be made. Sliding the sliding seat forward will increase the distance between the foot pedal and the seat, and sliding the sliding seat backward will decrease the distance between the foot pedal and the seat. When the desired position is reached, the sliding seat and the fixing device can be fixed again.

[0005] However, because the foot pedal is positioned low, patients or their families need to bend over to operate and adjust the pedal depth. Bending over to adjust the pedal puts the body in an unstable position (especially when the patient is in a wheelchair), and it is easy to fall if not careful. Moreover, bending over is very difficult for the elderly or people with back problems. Therefore, this utility model proposes a wheelchair foot pedal adjustment structure that is easy to use. Utility Model Content

[0006] This utility model proposes an easy-to-use wheelchair foot pedal adjustment structure, which solves the problem that existing foot pedal adjustments require bending over and pose certain safety risks.

[0007] The technical solution of this utility model is as follows: A user-friendly wheelchair foot pedal adjustment structure includes a wheelchair frame, with mounting seats fixedly connected to both ends of the wheelchair frame. A pedal assembly is provided between the two mounting seats. The pedal assembly includes a rotating frame, with the top two ends of the rotating frame rotatably connected to the two mounting seats respectively. A collar is slidably connected to both ends of the rotating frame, and a horizontally arranged movable rod is fixedly connected between the two collars. A foot pedal is fixedly connected to the middle of the movable rod. A lifting component for adjusting the height of the foot pedal is provided at the bottom of the foot pedal, and a positioning component for limiting the rotation of the rotating frame is provided on the outer side of one of the mounting seats.

[0008] Preferably, the rotating frame has a U-shaped structure, and the vertical section of the rotating frame is rotatably connected to the mounting base via a pin.

[0009] Preferably, the lifting component includes two sleeves, which are slidably connected to the two ends of the bottom of the rotating frame. A rotating rod is hinged to the top of each sleeve, and the two rotating rods are arranged crosswise and rotatably connected at the intersection by a pin. A sleeve is hinged to the top of each rotating rod, and the two sleeves are slidably connected to the two ends of the movable rod.

[0010] Preferably, the lifting component further includes an electric actuator, one end of which is hinged to the bottom end of one of the rotating rods, and the other end of which is hinged to the top end of another rotating rod.

[0011] Preferably, the positioning component includes a fixing plate fixedly connected to the outside of the mounting base. One end of the fixing plate is slidably connected to a rod that passes through the fixing plate. The outside of the mounting base is provided with a circular block that is coaxially fixed with the rotating frame. The outer wall of the circular block is provided with a plurality of slots that are equally distributed around the circular block. The rod slides into any one of the slots. A pull rope is fixedly connected to the top of the rod. A stop block is fixedly connected to the middle of the rod. A return spring is sleeved on the rod. The top end of the return spring abuts against the fixing plate, and the bottom end of the return spring abuts against the stop block.

[0012] Preferably, the wheelchair frame is provided with an operating component, which includes a fixed seat fixedly connected to the outside of the wheelchair frame. One side of the fixed seat is rotatably connected to a winding wheel for winding the pull rope via a rotating shaft. A hand crank is coaxially fixedly connected to the outside of the winding wheel.

[0013] Preferably, a torsion spring is sleeved on the shaft of the take-up reel, one end of the torsion spring is welded to the take-up reel, and the other end of the torsion spring is welded to the fixed base.

[0014] Preferably, the top of the fixed base is provided with a control switch electrically connected to the electric push rod via a wire, and the control switch, the electric push rod and the power supply form an electrical path.

[0015] The working principle and beneficial effects of this utility model are as follows:

[0016] 1. The electric adjustment of the foot pedal height is achieved by controlling the lifting component through the electric push rod, and the angle adjustment is completed by operating the positioning component with the hand crank. The entire process does not require the user to bend over, which significantly reduces the risk of falling due to bending over. It is especially suitable for patients with limited mobility or back problems.

[0017] 2. The lifting mechanism adopts a cross-rotating rod structure. The sleeve is driven to slide through an electric push rod, which drives the movable rod and foot pedal to rise and fall vertically. The adjustment process is smooth and precise, and can adapt to the personalized needs of different users for the height of the foot pedal.

[0018] 3. The slot design of the round block and the insertion rod in the positioning component, combined with the return spring and the hand crank winding device, allows users to easily unlock and freely adjust the angle of the rotating frame. After being released, it automatically resets and fixes itself, realizing flexible positioning of the foot pedal at multiple angles.

[0019] 4. The control switches and hand crank are centrally located on the outside of the wheelchair, allowing users or caregivers to complete all adjustments with one hand, simplifying the process and improving the user experience. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of a user-friendly wheelchair footrest adjustment structure according to the present invention;

[0022] Figure 2 This is a schematic diagram of the pedal assembly of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the lifting component of this utility model;

[0024] Figure 4 for Figure 2 An enlarged structural diagram of part A;

[0025] Figure 5 for Figure 2 An enlarged structural diagram of part B.

[0026] In the diagram: 1. Wheelchair frame; 2. Mounting base; 3. Pedal assembly; 31. Rotating frame; 32. Collar; 33. Movable rod; 34. Foot pedal; 35. Lifting component; 351. Sleeve 1; 352. Rotating rod; 353. Sleeve 2; 354. Electric actuator; 36. Round block; 361. Slot; 37. Positioning component; 371. Fixing plate; 372. Insert rod; 373. Stop block; 374. Return spring; 375. Pull rope; 38. Operating component; 381. Fixing base; 382. Control switch; 383. Rewinding wheel; 384. Hand crank; 385. Torsion spring. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] like Figures 1-5 As shown, this embodiment proposes a user-friendly wheelchair footrest adjustment structure, including a wheelchair frame 1. Mounting seats 2 are fixedly connected to both ends of the wheelchair frame 1. A footrest assembly 3 is disposed between the two mounting seats 2. The footrest assembly 3 includes a rotating frame 31, which has a U-shaped structure. The vertical section of the rotating frame 31 is rotatably connected to the mounting seats 2 via a pin. Both ends of the rotating frame 31 are slidably connected to collars 32. A horizontally arranged movable rod 33 is fixedly connected between the two collars 32. A footrest 34 is fixedly connected to the middle of the movable rod 33. A lifting member 35 for adjusting the height of the footrest 34 is provided at the bottom of the footrest 34. A positioning member 37 for restricting the rotation of the rotating frame 31 is provided on the outer side of one of the mounting seats 2.

[0029] The height of the foot pedal 34 can be adjusted by the lifting component 35 so that the patient's foot touches the foot pedal 34. The patient can push it with their foot or a family member can manually push the rotating frame 31 to make it rotate, thus adjusting the angle of the rotating frame 31. After adjusting to the appropriate angle, it is positioned by the positioning component 37, thus realizing the angle adjustment of the foot pedal 34. The entire adjustment process does not require the patient or family member to bend over, which greatly improves the safety of foot pedal adjustment.

[0030] The lifting component 35 includes two sleeves 351, which are slidably connected to the two ends of the bottom of the rotating frame 31. The top of each sleeve 351 is hinged with a rotating rod 352. The two rotating rods 352 are arranged crosswise and are rotatably connected at the intersection by a pin. The top of each rotating rod 352 is hinged with a sleeve 353, which is slidably connected to the two ends of the movable rod 33. The bottom end of one of the rotating rods 352 is hinged with an electric push rod 354, and one end of the electric push rod 354 is hinged to the top end of the other rotating rod 352.

[0031] By controlling the electric actuator 354, the two rotating rods 352 can rotate in opposite directions, causing the two sleeves 353 to rotate in opposite directions, and the movable rod 33 to move up or down, thus allowing the foot pedal 34 to move in the vertical direction. This achieves height adjustment of the foot pedal 34. This process is directly operated electrically, eliminating the need for patients or family members to bend over, which not only improves the safety of the operation but also reduces the difficulty of operation.

[0032] Furthermore, the positioning component 37 includes a fixing plate 371 fixedly connected to the outside of the mounting base 2. One end of the fixing plate 371 is slidably connected to an insertion rod 372 that passes through the fixing plate 371. The outside of the mounting base 2 is provided with a circular block 36 that is coaxially fixed with the rotating frame 31. The outer wall of the circular block 36 is provided with a plurality of slots 361 that are equally distributed around the circular block 36. The insertion rod 372 slides in cooperation with any one of the slots 361. A pull rope 375 is fixedly connected to the top of the insertion rod 372. A stop block 373 is fixedly connected to the middle of the insertion rod 372. A return spring 374 is sleeved on the insertion rod 372. The top end of the return spring 374 abuts against the fixing plate 371, and the bottom end of the return spring 374 abuts against the stop block 373.

[0033] By pulling the pull rope 375 upwards, the insertion rod 372 is disengaged from the slot 361, so that the insertion rod 372 no longer restricts the rotation of the circular block 36. At this time, the return spring 374 is compressed and accumulates potential energy. The patient can push it with their foot or a family member can manually push the rotating frame 31 to make it rotate. This can adjust the angle of the foot pedal 34. After adjusting to the appropriate angle, the pull rope 375 is released, and the return spring 374 releases potential energy, so that the insertion rod 372 re-engages with the corresponding slot 361. This keeps the rotating frame 31 stable. The angle of the foot pedal 34 can be freely adjusted throughout the process to meet different angle requirements of the foot pedal 34.

[0034] Furthermore, the wheelchair frame 1 is provided with an operating component 38, which includes a fixed base 381 fixedly connected to the outside of the wheelchair frame 1. One side of the fixed base 381 is rotatably connected to a winding wheel 383 for winding the pull rope 375 via a rotating shaft. A hand crank 384 is coaxially fixedly connected to the outside of the winding wheel 383. A torsion spring 385 is sleeved on the rotating shaft of the winding wheel 383. One end of the torsion spring 385 is welded to the winding wheel 383, and the other end of the torsion spring 385 is welded to the fixed base 381. A control switch 382 is provided on the top of the fixed base 381 and electrically connected to an electric push rod 354 via a wire. The control switch 382, ​​the electric push rod 354 and the power supply form an electrical circuit.

[0035] Working principle: When the height of the foot pedal 34 needs to be adjusted, the patient or family member can control the extension and retraction of the output end of the electric actuator 354 through the control switch 382, ​​so that the two rotating rods 352 rotate in opposite directions, so that the two sleeves 353 rotate in opposite directions, so that the movable rod 33 moves up or down, thus making the foot pedal 34 move in the vertical direction, thereby realizing the height adjustment of the foot pedal 34. This process is directly operated by electricity, without the need for the patient or family member to bend over, which not only improves the safety of operation, but also reduces the difficulty of operation.

[0036] When the angle of the foot pedal 34 needs to be adjusted, the patient or family member can operate the hand crank 384 to rotate the winding wheel 383 and wind up the pull rope 375. This tightens the pull rope 375 and pulls the insert rod 372 upward, disengaging it from the slot 361. The insert rod 372 no longer restricts the rotation of the circular block 36. At this time, the return spring 374 is compressed and stores potential energy. The patient can then push the rotating frame 31 with their foot or a family member can manually push it to adjust the angle of the foot pedal 34. After adjusting to the appropriate angle, the hand crank 384 is released, and the return spring 374 releases its potential energy, allowing the insert rod 372 to re-engage with the corresponding slot 361. This keeps the rotating frame 31 stable. The entire process allows for free adjustment of the foot pedal 34 angle to meet different angle requirements.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wheelchair footrest adjustment structure which is convenient to use, comprising a wheelchair frame body (1), characterized in that, The wheelchair frame (1) is fixedly connected to two mounting bases (2) at both ends. A pedal assembly (3) is provided between the two mounting bases (2). The pedal assembly (3) includes a rotating frame (31). The two ends of the top of the rotating frame (31) are rotatably connected to the two mounting bases (2) respectively. Both ends of the rotating frame (31) are slidably connected to collars (32). A horizontally arranged movable rod (33) is fixedly connected between the two collars (32). A foot pedal (34) is fixedly connected to the middle of the movable rod (33). A lifting component (35) for adjusting the height of the foot pedal (34) is provided at the bottom of the foot pedal (34). A positioning component (37) for limiting the rotation of the rotating frame (31) is provided on the outer side of one of the mounting bases (2).

2. The wheelchair footrest adjustment structure of claim 1, wherein The rotating frame (31) has a U-shaped structure, and the vertical section of the rotating frame (31) is rotatably connected to the mounting base (2) by a pin.

3. The wheelchair footrest adjustment structure of claim 1, wherein The lifting component (35) includes two sleeves (351), which are slidably connected to the two ends of the bottom of the rotating frame (31). The top of each sleeve (351) is hinged with a rotating rod (352). The two rotating rods (352) are arranged crosswise and are rotatably connected at the intersection by a pin. The top of each rotating rod (352) is hinged with a sleeve (353), which is slidably connected to the two ends of the movable rod (33).

4. The wheelchair footrest adjustment structure of claim 3, wherein The lifting component (35) also includes an electric actuator (354), one end of which is hinged to the bottom end of one of the rotating rods (352), and the other end of which is hinged to the top end of another rotating rod (352).

5. The wheelchair footrest adjustment structure of claim 4, wherein The positioning component (37) includes a fixing plate (371) fixedly connected to the outside of the mounting base (2). One end of the fixing plate (371) is slidably connected to a rod (372) that passes through the fixing plate (371). The outside of the mounting base (2) is provided with a circular block (36) that is coaxially fixed with the rotating frame (31). The outer wall of the circular block (36) is provided with a number of slots (361) that are equally distributed around the circular block (36). The rod (372) slides with any one of the slots (361). A pull rope (375) is fixedly connected to the top of the rod (372). A stop block (373) is fixedly connected to the middle of the rod (372). A return spring (374) is sleeved on the rod (372). The top end of the return spring (374) abuts against the fixing plate (371), and the bottom end of the return spring (374) abuts against the stop block (373).

6. The wheelchair footrest adjustment structure of claim 5, wherein The wheelchair frame (1) is provided with an operating component (38). The operating component (38) includes a fixed seat (381) fixedly connected to the outside of the wheelchair frame (1). One side of the fixed seat (381) is rotatably connected to a winding wheel (383) for winding the pull rope (375) via a rotating shaft. A hand crank (384) is coaxially fixedly connected to the outside of the winding wheel (383).

7. The wheelchair footrest adjustment structure of claim 6, wherein A torsion spring (385) is sleeved on the shaft of the take-up reel (383). One end of the torsion spring (385) is welded to the take-up reel (383), and the other end of the torsion spring (385) is welded to the fixed seat (381).

8. The wheelchair footrest adjustment structure of claim 6, wherein The top of the fixed base (381) is provided with a control switch (382) electrically connected to the electric push rod (354) via a wire. The control switch (382), the electric push rod (354) and the power supply form an electrical path.

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