A wheelchair pedal connection device for enhancing foot pump exercise

Abstract

The present invention designs a wheelchair pedal connection device for enhancing foot pumping exercise, including an external buffer component, a shell and an internal limit component. The external buffer component includes a cylinder, a piston is slidably installed inside the cylinder, the piston divides the interior of the cylinder into two cavities, the cavities are filled with buffering medium, a push rod is fixed at the axis of the piston, a fluid exchange pipeline is opened in the push rod, the internal limit component includes two sliding blocks, an inner support rotating block and a connecting shaft, the inner support rotating block is rotatably arranged between the two sliding blocks, the present invention is fixed to the bottom of the wheelchair, and the internal limit component ensures the safe rotation range of the pedal, while making the rotation process more stable and avoiding the influence of deformation on the spring, and the rotation or rebound process of the pedal is rotationally buffered by the external buffer component. No matter whether the patient presses down with the toes or the heels, there is no need to worry about the safety problems caused by the instantaneous rebound of the pedal, thereby ensuring the safety of the patient when doing foot pumping exercise.

Description

Technical Field

[0001] The present invention relates to the technical field of medical wheelchairs, and in particular to a wheelchair pedal connecting device for enhancing foot pumping exercise. Background Art

[0002] Foot pump exercises are performed by hooking or pressing the toes up, causing muscle contraction to compress blood vessels, promoting blood return, accelerating blood circulation in the lower limbs, preventing deep vein thrombosis, relaxing the patient's leg muscles, and reducing lower limb tissue edema. Foot pump exercises are very suitable for recovery exercises for patients who have been sitting in wheelchairs for a long time because of their small range of motion and simple operation. However, most current wheelchair pedals are fixed and cannot meet the movement requirements of patients during foot pump exercises. In order to improve comfort during use, some wheelchairs use torsion springs to connect the pedal shaft. Although the rotation requirements of the pedals are met, the rotation process is not smooth, and it is easy to cause safety hazards to the patient's lower limbs when rebounding. Summary of the Invention

[0003] The object of the present invention is to provide a wheelchair pedal connection device for enhancing foot pumping exercise to solve the problems mentioned in the above background technology.

[0004] The technical solution of the wheelchair pedal connection device for enhancing foot pump exercise of the present invention is:

[0005] A wheelchair pedal connection device for enhancing foot pump exercise, comprising an external buffer assembly, a shell and an internal limit assembly, the external buffer assembly comprising a cylinder, the cylinder being fixedly mounted on the outer wall of the shell, a sealing cover and a sealing seat being fixedly mounted at both ends of the cylinder, a piston being slidably mounted inside the cylinder, the piston dividing the interior of the cylinder into a first cavity and a second cavity, the first cavity and the second cavity being filled with a buffering medium, a push rod being fixedly mounted at the axis of the piston, one end of the push rod extending into the first cavity, the other end of the push rod extending into the shell, a fluid exchange pipe being provided in the push rod, a first fluid exchange hole and a second fluid exchange hole being provided at both ends of the fluid exchange pipe, the internal spaces of the first cavity and the second cavity being connected to each other through the fluid exchange pipe, the internal limit assembly comprising a first sliding block, an inner support rotating block, a second sliding block and a connecting shaft, the first sliding block and the push rod being fixedly connected, an outwardly expandable cabin being enclosed between the first sliding block and the second sliding block, the inner support rotating block being rotatably arranged in the outwardly expandable cabin, and the connecting shaft being fixedly mounted at the axis of the inner support rotating block.

[0006] Preferably, a first fixing seat and a second fixing seat are provided in the second cavity, the first fixing seat is fixedly connected to the piston, the second fixing seat is fixedly connected to the sealing seat, and the first fixing seat and the second fixing seat are elastically connected via a first spring.

[0007] Preferably, the first sliding block and the second sliding block are respectively provided with sliding grooves, and a plurality of limit rods slidably matched with the sliding grooves are fixed on the inner wall of the shell. The first sliding block and the second sliding block are slidably arranged in the shell.

[0008] Preferably, the first sliding block and the second sliding block are elastically connected via a second spring.

[0009] Preferably, the buffer medium in the first cavity and the second cavity is hydraulic oil.

[0010] Preferably, a top cover is fixed to the top of the shell by a bolt assembly.

[0011] Preferably, the sealing cover is provided with a pressure relief pipe, and a bursting disc is installed in the pressure relief pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] When the first and second sliding blocks are in contact with the inner wall of the shell, the maximum rotation angle of the inner supporting rotating block is reached, thereby ensuring the safe rotation range of the pedal and increasing the stability of the pedal rotation and preventing the spring from being affected by deformation. When the first sliding block moves, it pushes the push rod to move toward the inside of the cylinder body, so that the piston pushes the hydraulic oil in the first cavity to flow into the second cavity through the fluid exchange pipe to achieve a damping effect. Similarly, when the inner supporting rotating block is reset under the tension of the first and second springs, the hydraulic oil is returned to the first cavity, so that the patient can obtain rotation buffering whether he steps on the pedal vigorously or lightly, and there is no need to worry about the safety problem caused by the instantaneous rebound of the pedal whether the patient presses down with his toes or heels, thereby ensuring the safety of the patient when doing foot pumping exercises. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 Schematic diagram of the specific structure of the inner limit assembly in the present invention;

[0017] Figure 3 This is a schematic diagram of the state of the internal support rotating block of the present invention when it rotates;

[0018] In the figure: 1. External buffer assembly; 2. Shell; 3. Internal limit assembly; 4. Sealing cover; 5. Pressure relief pipe; 6. First cavity; 7. Piston; 8. Second cavity; 9. First spring; 10. Push rod; 11. First fluid exchange hole; 12. Fluid exchange pipe; 13. First fixed seat; 14. Second fluid exchange hole; 15. Second fixed seat; 16. Sealing seat; 17. Limit rod; 18. Top cover; 19. First sliding block; 20. Inner support rotating block; 21. Second spring; 22. Slide groove; 23. Second sliding block; 24. Connecting shaft; 25. Cylinder. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-3 , the present invention provides a technical solution:

[0021] A wheelchair pedal connection device for enhancing foot pump exercise includes an outer buffer assembly 1, a shell 2 and an inner limit assembly 3. The top of the shell 2 is fixed with a top cover 18 by a bolt assembly. The outer buffer assembly 1 includes a cylinder 25, which is fixed to the outer wall of the shell 2. The two ends of the cylinder 25 are respectively fixed with a sealing cover 4 and a sealing seat 16. The sealing cover 4 is provided with a pressure relief pipe 5, and a bursting disc is installed in the pressure relief pipe 5. A piston 7 is slidably installed inside the cylinder 25, and the piston 7 separates the interior of the cylinder 25. The first cavity 6 and the second cavity 8 are filled with hydraulic oil. A push rod 10 is fixed at the axis of the piston 7. A sliding seal is made between the push rod 10 and the sealing seat 16. One end of the push rod 10 extends into the first cavity 6, and the other end of the push rod 10 extends into the housing 2. A fluid exchange pipe 12 is opened in the push rod 10. The two ends of the fluid exchange pipe 12 are respectively provided with a first fluid exchange hole 11 and a second fluid exchange hole 14. The internal space of the first cavity 6 and the second cavity 8 is connected by a plurality of channels. The fluid exchange pipes 12 are interconnected, and the inner limit assembly 3 includes a first sliding block 19, an inner support rotating block 20, a second sliding block 23 and a connecting shaft 24. The first sliding block 19 and the push rod 10 are fixedly connected, and an outwardly expandable chamber is formed between the first sliding block 19 and the second sliding block 23. The inner support rotating block 20 is rotatably arranged in the outwardly expandable chamber, and the connecting shaft 24 is fixed at the axis of the inner support rotating block 20. The first fixed seat 13 and the second fixed seat 15 are provided in the second cavity 8. The first fixed seat 1 3 is fixedly connected to the piston 7, the second fixed seat 15 is fixedly connected to the sealing seat 16, the first fixed seat 13 and the second fixed seat 15 are elastically connected by the first spring 9, the first sliding block 19 and the second sliding block 23 are respectively provided with a sliding groove 22, and a plurality of limit rods 17 that slide with the sliding groove 22 are fixedly provided on the inner wall of the housing 2, the first sliding block 19 and the second sliding block 23 are slidably arranged in the housing 2, and the first sliding block 19 and the second sliding block 23 are elastically connected by the second spring 21.

[0022] The working principle of the present invention is as follows: the device is fixedly mounted on the bottom of the wheelchair, so that the connecting shaft 24 is fixedly connected to the wheelchair pedal. When the pedal rotates, the inner support rotating block 20 fixed to the connecting shaft 24 rotates synchronously. The inner support rotating block 20 pushes the first sliding block 19 and the second sliding block 23 to the sides. The pushed state is as follows: Figure 3As shown, when the first sliding block 19 and the second sliding block 23 are in contact with the inner wall of the shell 2, the maximum rotation angle of the inner support rotating block 20 is achieved, which ensures the safe rotation range of the pedal, increases the stability of the pedal rotation and avoids the spring from being affected by deformation. When the first sliding block 19 moves, it pushes the push rod 10 to move toward the inside of the cylinder 25, so that the piston 7 pushes the hydraulic oil in the first cavity 6 to flow into the second cavity 8 through the fluid exchange pipe 12, thereby achieving a damping effect. Similarly, when the inner support rotating block 20 is reset under the tension of the first spring 9 and the second spring 21, the hydraulic oil is returned to the first cavity 6, so that the patient can obtain rotation buffering of the pedal's rotation or rebound process regardless of whether he steps hard or lightly. Regardless of whether the patient presses down with his toes or heels, there is no need to worry about the safety problems caused by the instantaneous rebound of the pedal, thereby ensuring the safety of the patient when doing foot pumping exercises.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wheelchair pedal connection device for enhancing foot pumping exercise, comprising an outer buffer component (1), a housing (2) and an inner limit component (3), characterized in that: The external buffer assembly (1) includes a cylinder (25), which is fixed on the outer wall of the shell (2), and a sealing cover (4) and a sealing seat (16) are fixed at both ends of the cylinder (25). A piston (7) is slidably installed inside the cylinder (25), and the piston (7) divides the interior of the cylinder (25) into a first cavity (6) and a second cavity (8). The first cavity (6) and the second cavity (8) are filled with a buffer medium. A push rod (10) is fixed at the axis of the piston (7), one end of the push rod (10) extends into the first cavity (6), and the other end of the push rod (10) extends into the shell (2). A fluid exchange pipeline (12) is opened in the push rod (10). ), the two ends of the fluid exchange pipe (12) are respectively provided with a first fluid exchange hole (11) and a second fluid exchange hole (14), the internal spaces of the first cavity (6) and the second cavity (8) are interconnected through the fluid exchange pipe (12), the internal limit assembly (3) includes a first sliding block (19), an internal support rotating block (20), a second sliding block (23) and a connecting shaft (24), the first sliding block (19) and the push rod (10) are fixedly connected, and an outwardly expandable chamber is formed between the first sliding block (19) and the second sliding block (23), the inner support rotating block (20) is rotatably arranged in the outwardly expandable chamber, and the connecting shaft (24) is fixed at the axis of the inner support rotating block (20).

2. A wheelchair pedal connection device for enhancing foot pumping exercise according to claim 1, characterized in that: A first fixed seat (13) and a second fixed seat (15) are provided in the second cavity (8); the first fixed seat (13) and the piston (7) are fixedly connected; the second fixed seat (15) and the sealing seat (16) are fixedly connected; the first fixed seat (13) and the second fixed seat (15) are elastically connected via a first spring (9).

3. The wheelchair pedal connection device for enhancing foot pumping according to claim 1, characterized in that: The first sliding block (19) and the second sliding block (23) are respectively provided with a sliding groove (22); a plurality of limiting rods (17) that slide in cooperation with the sliding groove (22) are fixed on the inner wall of the housing (2); the first sliding block (19) and the second sliding block (23) are slidably arranged in the housing (2).

4. The wheelchair pedal connection device for enhancing foot pumping according to claim 1, characterized in that: The first sliding block (19) and the second sliding block (23) are elastically connected via a second spring (21).

5. The wheelchair pedal connection device for enhancing foot pumping exercise according to claim 1, characterized in that: The buffer medium in the first cavity (6) and the second cavity (8) is hydraulic oil.

6. The wheelchair pedal connection device for enhancing foot pumping exercise according to claim 1, characterized in that: A top cover (18) is fixed to the top of the housing (2) via a bolt assembly.

7. The wheelchair pedal connection device for enhancing foot pumping according to claim 1, characterized in that: The sealing cover (4) is provided with a pressure relief pipe (5), and a bursting disc is installed in the pressure relief pipe (5).

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