A height-adjustable pedal structure for wheelchairs

Abstract

This utility model relates to the field of wheelchair device technology, specifically to a height-adjustable pedal structure for a wheelchair. It includes a wheelchair body, a rectangular frame fixedly connected to the lower end of the wheelchair body, and a pedal lifting assembly rotatably connected to the top of the rectangular frame. The pedal lifting assembly includes a ball screw rotatably connected to the top of the rectangular frame, with a lifting slider threaded onto the outer peripheral wall of the ball screw. Two L-shaped sliding rods are slidably connected through the bottom of the rectangular frame, and lateral sliders are fixedly connected to the top of each of the two lifting sliders. Both lateral sliders are fixedly connected to the lifting sliders via connecting brackets. This utility model allows for the lifting and lowering movement of the two sets of L-shaped sliding rods and the pedals, enabling adjustment of the height of the two pedals, effectively improving the usability of the wheelchair. Furthermore, it allows for automatic retraction of the pedals without manual adjustment, enhancing the ease of use of the wheelchair pedal structure.

Description

Technical Field

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

[0002] Wheelchairs are mobility aids designed for people with mobility impairments. They consist of a frame, seat, wheels, etc., and can help users move independently or with the assistance of others, improving the convenience and independence of travel. Wheelchair footrests are flat components installed on both sides of the front of the wheelchair to place the feet to maintain a comfortable sitting posture and avoid discomfort from the feet dangling in the air, so that people with mobility impairments can quickly get on and off the wheelchair, improving the convenience of the wheelchair.

[0003] Existing technologies often have the following problems when used:

[0004] Currently, the footrests in some wheelchairs are typically fixed, making them difficult to adjust in height. This makes them unsuitable for different users, resulting in low usability. Furthermore, the footrests take up a lot of space when not in use and often require manual adjustment for storage, as they cannot be automatically folded, further affecting their ease of use. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a height-adjustable pedal structure for wheelchairs, which can effectively solve the problems that the existing wheelchair pedals are mostly fixed structures, which are not convenient to adjust to suit different people and have low applicability, and the pedal structure occupies space when not in use and requires manual adjustment and cannot be automatically retracted, affecting the convenience of use.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a height-adjustable footboard structure for wheelchairs, comprising:

[0008] The wheelchair body has a rectangular frame fixedly connected to its lower end face, and a pedal lifting assembly is rotatably connected to the top of the rectangular frame.

[0009] The pedal lifting assembly includes a ball screw rotatably connected to the top of a rectangular frame, a lifting slider threaded onto the outer peripheral wall of the ball screw, two L-shaped slide rods slidably connected through the bottom of the rectangular frame, a side slider fixedly connected to the top of each of the two lifting sliders, the two side sliders fixedly connected to the lifting sliders via connecting brackets, a rotating rod rotatably connected to the bottom of each of the two L-shaped slide rods, and a pedal fixedly connected to the outer peripheral wall of each of the two rotating rods;

[0010] Two pedal storage assemblies are fixedly connected to the outer wall of the rectangular frame. The pedal storage assemblies are used to drive the rotating rod and pedal to rotate.

[0011] Furthermore, the pedal lifting assembly also includes a servo motor fixedly installed on the lower end face of the rectangular frame, and the output end of the servo motor is fixedly connected to the lower end of the ball screw.

[0012] Furthermore, a support plate is fixedly connected to the lower end face of the L-shaped slide bar, and the pedal selectively contacts and presses against the support plate.

[0013] Furthermore, the pedal storage assembly includes a fixed frame fixedly connected to the outer wall of the rectangular frame, a stepper motor is fixedly installed on the fixed frame, and synchronous gears are fixedly connected to the output end and the end of the rotating rod of the stepper motor, and the two synchronous gears are connected by synchronous track transmission.

[0014] Furthermore, a linear guide rail is fixedly connected between the top and bottom of the rectangular frame, and the lifting slider slides in contact with the linear guide rail.

[0015] Furthermore, several anti-slip horizontal strips are fixedly connected to the upper surface of the pedal.

[0016] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0017] This invention includes a pedal lifting assembly. By driving the lifting slider to move up and down, two lateral sliders move up and down synchronously, thereby enabling the lifting and lowering of two sets of L-shaped slides and pedals. This allows for adjustment of the height of the two pedals, effectively improving the usability of the wheelchair.

[0018] This invention includes a pedal storage component. By driving two rotating rods to rotate, the two rods can rotate the two pedals upward by 90 degrees, so that the two pedals are in a vertical position relative to each other in use. This allows the pedals to be automatically retracted without manual adjustment, improving the ease of use of the wheelchair pedal structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram from one perspective of the present invention;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0022] Figure 3 This is a schematic diagram of the rectangular frame structure in this utility model;

[0023] Reference numerals: 1. Wheelchair body; 2. Rectangular frame; 3. Ball screw; 4. Lifting slider; 5. L-shaped slide bar; 6. Side slider; 7. Rotating rod; 8. Pedal; 9. Servo motor; 10. Support plate; 11. Stepper motor; 12. Synchronous gear; 13. Synchronous track; 14. Linear guide rail; 15. Anti-slip crossbar. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The present invention will be further described below with reference to the embodiments.

[0026] Example: Refer to Figures 1 to 3 A height-adjustable pedal structure for a wheelchair includes: a wheelchair body 1; a rectangular frame 2 fixedly connected to the lower end of the wheelchair body 1; a pedal lifting assembly rotatably connected to the top of the rectangular frame 2; the pedal lifting assembly includes a ball screw 3 rotatably connected to the top of the rectangular frame 2; a lifting slider 4 threadedly fitted to the outer peripheral wall of the ball screw 3; a linear guide rail 14 fixedly connected between the top and bottom of the rectangular frame 2; the lifting slider 4 slidingly engaging with the linear guide rail 14; and two L-shaped sliding rods 5 slidably connected through the bottom of the rectangular frame 2; each of the two lifting sliders 4 has a lateral slider fixedly connected to its top. 6. Both lateral sliders 6 are fixedly connected to the lifting slider 4 via connecting brackets. Both L-shaped sliders 5 are rotatably connected to the bottom end of a rotating rod 7. Both rotating rods 7 are fixedly connected to the outer periphery of a pedal 8. Several anti-slip strips 15 are fixedly connected to the upper end of the pedal 8. A support plate 10 is fixedly connected to the lower end of the L-shaped slider 5. The pedal 8 selectively contacts and presses against the support plate 10. The pedal lifting assembly also includes a servo motor 9 fixedly installed on the lower end of the rectangular frame 2. The servo motor 9 is model 80DK-M07725. The output end of the servo motor 9 is fixedly connected to the lower end of the ball screw 3.

[0027] Specifically, when the lifting slider 4 is driven to move up and down, the lifting slider 4 can slide relative to the linear guide rail 14, and at the same time the two L-shaped slide rods 5 can slide relative to the bottom of the rectangular frame 2 to ensure the linearity and stability of the lifting slider 4 and the two pedals 8 in moving up and down.

[0028] Specifically, when the pedal 8 is in use, the support plate 10 can support and limit the pedal 8 to ensure the stability of the pedal 8.

[0029] The ball screw 3 is driven to rotate by the servo motor 9, so that the lifting slider 4 can move along the axis of the ball screw 3 through the thread rotation with the ball screw 3. In this way, the lifting slider 4 can drive the two side sliders 6 to move up and down, so as to realize the lifting and lowering movement of the two sets of L-shaped slide bars 5 and pedals 8, so as to adjust the height of the two pedals 8 and effectively improve the applicability of the wheelchair.

[0030] Two pedal storage assemblies are fixedly connected to the outer wall of the rectangular frame 2. The pedal storage assemblies are used to drive the rotating rod 7 and pedal 8 to rotate. The pedal storage assemblies include a fixed frame fixedly connected to the outer wall of the rectangular frame 2. A stepper motor 11 is fixedly installed on the fixed frame. The stepper motor 11 is model 28BYJ-48. The output end of the stepper motor 11 and the end of the rotating rod 7 are both fixedly connected to synchronous gears 12. The two synchronous gears 12 are connected by synchronous track 13.

[0031] Specifically, the servo motor 9 and the two stepper motors 11 are all coupled to a closed circuit with an external power supply, and the servo motor 9 and the two stepper motors 9 are all equipped with a remote control module. The remote control module adopts the Bluetooth 5.0 communication protocol, which means that the operation of the pedal lifting assembly and the pedal storage assembly can be controlled by a dedicated remote control.

[0032] The stepper motor 11 drives the synchronous gear 12 at its output end to rotate, and the two synchronous gears 12 and the synchronous track 13 drive the rotating rod 7 to rotate, so that the rotating rod 7 can drive the pedal 8 to rotate upward by 90 degrees, so that the two pedals 8 are in a vertical position in the relative use state, thereby realizing the automatic retraction of the pedal 8 without manual adjustment, improving the ease of use of the wheelchair pedal structure.

[0033] The working principle of this utility model is as follows:

[0034] When in use, if it is necessary to adjust the height of the pedal 8 according to the usage requirements, the servo motor 9 can be started. The servo motor 9 drives the ball screw 3 to rotate, so that the lifting slider 4 can move along the axis of the ball screw 3 through the thread rotation with the ball screw 3. In this way, the lifting slider 4 can drive the two side sliders 6 to move up and down, so as to realize the lifting and lowering movement of the two sets of L-shaped slide rods 5 and the pedal 8, so as to adjust the height of the two pedals 8.

[0035] If the pedal structure is not in use and the space occupied by the pedal structure needs to be reduced, the two stepper motors 11 can be started separately. The stepper motors 11 drive the synchronous gears 12 at their output ends to rotate. The transmission cooperation between the two synchronous gears 12 and the synchronous track 13 drives the rotating rod 7 to rotate, so that the rotating rod 7 can drive the pedal 8 to rotate upward by 90 degrees, so that the two pedals 8 are in a vertical position relative to each other in the use state, realizing the automatic retraction of the pedals 8.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A height-adjustable footboard structure for a wheelchair, characterized in that, include: The wheelchair body (1) has a rectangular frame (2) fixedly connected to its lower end face, and a pedal lifting assembly is rotatably connected to the top of the rectangular frame (2). The pedal lifting assembly includes a ball screw (3) rotatably connected to the top of a rectangular frame (2), a lifting slider (4) threadedly fitted on the outer peripheral wall of the ball screw (3), two L-shaped slide rods (5) slidably connected through the bottom of the rectangular frame (2), a side slider (6) fixedly connected to the top of each of the two lifting sliders (4), the two side sliders (6) fixedly connected to the lifting sliders (4) through connecting brackets, a rotating rod (7) rotatably connected to the bottom of each of the two L-shaped slide rods (5), and a pedal (8) fixedly connected to the outer peripheral wall of each of the two rotating rods (7). Two pedal storage assemblies are fixedly connected to the outer wall of the rectangular frame (2). The pedal storage assemblies are used to drive the rotating rod (7) and the pedal (8) to rotate.

2. The height-adjustable footboard structure for a wheelchair according to claim 1, characterized in that, The pedal lifting assembly also includes a servo motor (9) fixedly installed on the lower end face of the rectangular frame (2), and the output end of the servo motor (9) is fixedly connected to the lower end of the ball screw (3).

3. The adjustable footboard structure for a wheelchair according to claim 1, characterized in that, The lower end face of the L-shaped slide bar (5) is fixedly connected to a support plate (10), and the pedal (8) selectively contacts and presses against the support plate (10).

4. The height-adjustable footboard structure for a wheelchair according to claim 1, characterized in that, The pedal storage assembly includes a fixed frame fixedly connected to the outer wall of the rectangular frame (2). A stepper motor (11) is fixedly installed on the fixed frame. The output end of the stepper motor (11) and the end of the rotating rod (7) are both fixedly connected to a synchronous gear (12). The two synchronous gears (12) are connected by a synchronous track (13).

5. The height-adjustable footboard structure for a wheelchair according to claim 1, characterized in that, A linear guide rail (14) is fixedly connected between the top and bottom of the rectangular frame (2), and the lifting slider (4) slides in contact with the linear guide rail (14).

6. The height-adjustable footboard structure for a wheelchair according to claim 1, characterized in that, Several anti-slip horizontal strips (15) are fixedly connected to the upper end surface of the pedal (8).

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