A damping-adjustable lower leg prosthetic ankle joint prosthesis structure

Abstract

The present invention discloses a calf prosthetic ankle joint prosthesis structure with adjustable damping, wherein a main shaft is fixed in a receiving groove, a second slider is sleeved on the main shaft, a first slider is sleeved on the second slider, circumferential fixed end caps are fixed at both ends of the second slider, adjusting nuts are threadedly connected at both ends of the main shaft, a reset spring is sleeved on the main shaft, and the two ends of the reset spring are respectively abutted against the circumferential fixed end cap and the adjusting nut; a support rod is also fixed in the receiving groove, a through hole is opened at one end of the tibial prosthesis, a support bearing is fixed in the through hole, and the support rod is fixedly connected to the support bearing, one end of the transmission rod is rotatably connected to the first slider, and the other end of the transmission rod is rotatably connected to the tibial prosthesis. The present invention can change the initial compression of the reset spring by rotating the adjusting nut, thereby changing the damping received by the ankle joint when it rotates, thereby achieving the purpose of adjusting the damping at the ankle joint, and the device has a simple structure, is easy to use, and has a high market prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically to a lower leg prosthesis ankle joint prosthesis structure with adjustable damping. Background Art

[0002] Safety accidents inevitably exist in people's daily lives. In some serious accidents, the injured may have to accept the choice of amputation. After the operation, patients often choose to install prostheses on the disabled parts to reduce the inconvenience caused by amputation.

[0003] Most of the existing ankle prostheses are unable to adjust the damping at the joint, and thus cannot meet the needs of different users, resulting in a poor user experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is that most existing ankle joint prostheses cannot adjust the damping at the joint. In order to overcome the defects of the prior art, the present invention proposes a lower leg prosthetic ankle joint prosthesis structure with adjustable damping, which can change the initial compression amount of the reset spring by rotating the adjustment nut, thereby changing the damping of the ankle joint during rotation, thereby achieving the purpose of adjusting the damping at the ankle joint, and the device has a simple structure, is easy to use, and has a high market prospect.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A damping-adjustable lower leg prosthetic ankle joint prosthesis structure comprises a foot bone prosthesis, a main shaft, a first slider, a second slider, a circumferential fixed end cover, a return spring, an adjustment nut, a support rod, a tibial prosthesis, a support bearing and a transmission rod;

[0007] The foot bone prosthesis is provided with a receiving groove, a main shaft is fixed in the receiving groove, a second slider is sleeved on the main shaft, the first slider is sleeved on the second slider, circumferential fixed end covers are fixed at both ends of the second slider, and the circumferential fixed end covers are abutted against the first slider, both ends of the main shaft are threadedly connected with adjusting nuts, a reset spring is sleeved on the main shaft, and both ends of the reset spring are respectively abutted against the circumferential fixed end cover and the adjusting nut;

[0008] A support rod is also fixed in the accommodating groove, a through hole is opened at one end of the tibial prosthesis, a support bearing is fixed in the through hole, and the support rod is fixedly connected to the support bearing, one end of the transmission rod is rotatably connected to the first slider, and the other end of the transmission rod is rotatably connected to the tibial prosthesis.

[0009] In a preferred technical solution of the present invention, a rectangular flat key is fixedly provided on the inner side of the circumferential fixed end cover, a key slot is provided on the main shaft, and the rectangular flat key is slidably connected to the key slot.

[0010] In a preferred technical solution of the present invention, the second sliding block is detachably connected to the circumferential fixed end cover.

[0011] In a preferred technical solution of the present invention, a fixing nut is threadedly connected to the side surface of the foot bone prosthesis, and the fixing nut is threadedly connected to the support rod.

[0012] In a preferred technical solution of the present invention, a fixing gasket is also fixed to the side wall of the accommodating groove.

[0013] In a preferred technical solution of the present invention, two transmission rods are provided, and the two transmission rods are symmetrically arranged on both sides of the main shaft.

[0014] The beneficial effects of the present invention are:

[0015] The damping-adjustable calf prosthetic ankle joint prosthesis structure proposed in the present invention can change the initial compression of the reset spring by rotating the adjusting nut, thereby changing the damping applied to the ankle joint during rotation, thereby achieving the purpose of adjusting the damping at the ankle joint. The device has a simple structure, is easy to use, and has a high market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a lower leg prosthetic ankle joint prosthesis structure with adjustable damping provided by a specific embodiment of the present invention;

[0017] Figure 2 yes Figure 1 main view.

[0018] In the figure:

[0019] 1. Foot bone prosthesis; 2. Receiving groove; 3. Main shaft; 4. First slider; 5. Second slider; 6. Circumferential fixed end cover; 7. Reset spring; 8. Adjustment nut; 9. Support rod; 10. Tibial prosthesis; 11. Through hole; 12. Support bearing; 13. Transmission rod; 14. Rectangular flat key; 15. Keyway; 16. Fixing nut; 17. Fixing gasket. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0021] Example

[0022] like Figure 1-2 As shown, the damping-adjustable lower leg prosthesis ankle joint prosthesis structure provided in the embodiment of the present invention comprises a foot bone prosthesis 1, a main shaft 3, a first slider 4, a second slider 5, a circumferential fixed end cover 6, a return spring 7, an adjustment nut 8, a support rod 9, a tibial prosthesis 10, a support bearing 12 and a transmission rod 13;

[0023] A accommodating groove 2 is provided on the foot bone prosthesis 1, a main shaft 3 is fixed in the accommodating groove 2, a second slider 5 is sleeved on the main shaft 3, a first slider 4 is sleeved on the second slider 5, circumferential fixed end covers 6 are fixed at both ends of the second slider 5, and the circumferential fixed end covers 6 are abutted against the first slider 4, adjusting nuts 8 are threadedly connected at both ends of the main shaft 3, a return spring 7 is sleeved on the main shaft 3, and the two ends of the return spring 7 are respectively abutted against the circumferential fixed end cover 6 and the adjusting nut 8;

[0024] A support rod 9 is also fixed in the accommodating groove 2, a through hole 11 is opened at one end of the tibial prosthesis 10, a support bearing 12 is fixed in the through hole 11, and the support rod 9 is fixedly connected to the support bearing 12, one end of the transmission rod 13 is rotatably connected to the first slider 4, and the other end of the transmission rod 13 is rotatably connected to the tibial prosthesis 10.

[0025] In this embodiment, the foot bone prosthesis 1 is a wedge-shaped structure, the receiving groove 2 is opened at the top of the foot bone prosthesis 1, and the main shaft 3 is fixed in the receiving groove 2 by fastening bolts. The second slider 5 is a detachable slider, and the second slider 5 can slide left and right on the main shaft 3. The first slider 4 is sleeved on the second slider 5, and the two circumferential fixed end covers 6 clamp the first slider 4, so that the first slider 4 and the second slider 5 are connected as a whole, so that they can slide synchronously with the first slider 4. Two reset springs 7 are symmetrically arranged at the two ends of the main shaft 3, so that the second slider 5 is limited to the center of the main shaft 3 when no force is applied, and the tibial prosthesis 10 is just in the vertical direction and perpendicular to the foot bone prosthesis 1. The adjusting nut 8 is threadedly connected to the two ends of the main shaft 3, and rotating the adjusting nut 8 can make it close to the circumferential fixed end cover 6, so that the reset spring 7 is squeezed, thereby adjusting the initial compression of the reset spring 7, so that the damping of the second slider 5 is increased. The support rod 9 is arranged at one end of the main shaft 3 and is located above the main shaft 3. The support bearing 12 is a ball bearing, and the tibial prosthesis 10 is rotatably connected to the support rod 9 through the support bearing 12. The transmission rod 13 is a straight rod, one end of which is connected to the midpoint of the first slider 4, and the other end of which is connected to the side of the tibial prosthesis 10, and the connection point is located above the support rod 9, for converting the rotation of the tibial prosthesis 10 into the left and right movement of the first slider 4.

[0026] Specifically, a rectangular flat key 14 is fixedly disposed on the inner side of the circumferential fixed end cover 6 , a key slot 15 is provided on the main shaft 3 , and the rectangular flat key 14 is slidably connected to the key slot 15 .

[0027] In this embodiment, the key slot 15 is arranged along the length direction of the main shaft 3. The rectangular flat key 14 is arranged to limit the rotational freedom of the circumferential fixed end cover 6, so as to ensure that the second slider 5 can only slide left and right. At the same time, the rectangular flat key 14 cooperates with the key slot 15 to limit the maximum sliding distance of the first slider 4.

[0028] Specifically, the second sliding block 5 is detachably connected to the circumferential fixed end cover 6 .

[0029] In this embodiment, both ends of the second sliding block 5 are provided with mounting platforms with threads, and the circumferential fixed end cover 6 is detachably connected to the mounting platform by fixing bolts, so the installation process is convenient.

[0030] Specifically, a fixing nut 16 is threadedly connected to the side surface of the foot bone prosthesis 1 , and the fixing nut 16 is threadedly connected to the support rod 9 .

[0031] In this embodiment, the support rod 9 is detachably connected to the side wall of the receiving groove 2, and the fixing nut 16 is used to fix the support rod 9 and the foot bone prosthesis 1 into an integrated structure. By providing the fixing nut 16, the tibial prosthesis 10 can be easily installed and removed, which is convenient for maintenance. In addition, the tibial prosthesis 10 is detachably connected to the foot bone prosthesis 1, and the two can be separated when not in use, thereby reducing the floor space and facilitating storage.

[0032] Specifically, a fixing gasket 17 is also fixed to the side wall of the receiving groove 2 .

[0033] In this embodiment, the fixing gasket 17 is sleeved on the support rod 9 , and can support and reinforce the support rod 9 .

[0034] Specifically, two transmission rods 13 are provided, and the two transmission rods 13 are symmetrically arranged on both sides of the main shaft 3 .

[0035] In this embodiment, the two transmission rods 13 are symmetrically arranged, which can balance the forces on both sides of the first slider 4 and reduce the load force on a single transmission rod 13, thereby reducing the pressure on the connection between the transmission rod 13 and the first slider 4, which helps to reduce wear and increase the service life of the transmission rod 13.

[0036] The working principle of the present invention is as follows: when the user uses the ankle joint prosthesis, the tibial prosthesis 10 performs a circular motion around the support rod 9 toward the toe under the action of force, and then the first slider 4 is pushed along the main axis 3 to move toward the toe through the transmission rod 13, and then the sliding of the first slider 4 will push the second slider 5 to slide synchronously until it reaches the limit position close to the toe, at which time the return spring 7 on the side close to the toe is compressed, and the return spring 7 on the side away from the toe is stretched, so as to buffer the tibial prosthesis 10; when the fastening prosthesis 10 is no longer subjected to force, under the action of the two return springs 7, the second slider 5 will be driven to return to the initial position, and at the same time, the tibial prosthesis 10 is driven to rotate in the direction away from the toe through the transmission rod 13, so that the tibial prosthesis 10 returns to the initial position; when the user needs to adjust the damping of the ankle joint, by rotating the corresponding adjusting nut 8, the initial compression amount of the return spring 7 is changed, so that the resistance encountered by the second slider 5 during the sliding process is increased, thereby achieving the adjustment of the damping at the ankle joint.

[0037] The above-mentioned embodiment of the present invention can change the initial compression of the return spring by rotating the adjustment nut, thereby changing the damping of the ankle joint during rotation, thereby achieving the purpose of adjusting the damping at the ankle joint. The device has a simple structure, is easy to use, and has a high market prospect.

[0038] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A lower leg prosthetic ankle joint prosthesis structure with adjustable damping, characterized in that: It comprises a foot bone prosthesis (1), a main shaft (3), a first slider (4), a second slider (5), a circumferential fixed end cover (6), a return spring (7), an adjustment nut (8), a support rod (9), a tibial prosthesis (10), a support bearing (12) and a transmission rod (13); A accommodating groove (2) is provided on the foot bone prosthesis (1), a main shaft (3) is fixedly provided in the accommodating groove (2), a second slider (5) is sleeved on the main shaft (3), a first slider (4) is sleeved on the second slider (5), circumferential fixed end covers (6) are fixedly provided at both ends of the second slider (5), and the circumferential fixed end covers (6) are abutted against the first slider (4), adjusting nuts (8) are threadedly connected at both ends of the main shaft (3), a return spring (7) is sleeved on the main shaft (3), and the two ends of the return spring (7) are respectively abutted against the circumferential fixed end covers (6) and the adjusting nut (8); A support rod (9) is fixedly disposed in the receiving groove (2); a through hole (11) is formed at one end of the tibial prosthesis (10); a support bearing (12) is fixedly disposed in the through hole (11); the support rod (9) and the support bearing (12) are fixedly connected; one end of the transmission rod (13) is rotatably connected to the first sliding block (4); and the other end of the transmission rod (13) is rotatably connected to the tibial prosthesis (10); A rectangular flat key (14) is also fixedly disposed on the inner side of the circumferential fixed end cover (6), a key slot (15) is provided on the main shaft (3), and the rectangular flat key (14) is slidably connected to the key slot (15).

2. The damping-adjustable lower leg prosthetic ankle joint prosthesis structure according to claim 1, characterized in that: The second sliding block (5) is detachably connected to the circumferential fixed end cover (6).

3. The damping-adjustable lower leg prosthetic ankle joint prosthesis structure according to claim 1, characterized in that: A fixing nut (16) is also threadedly connected to the side surface of the foot bone prosthesis (1), and the fixing nut (16) is threadedly connected to the support rod (9).

4. The damping-adjustable lower leg prosthetic ankle joint prosthesis structure according to claim 1, characterized in that: A fixing gasket (17) is also fixedly provided on the side wall of the containing groove (2).

5. The damping-adjustable lower leg prosthetic ankle joint prosthesis structure according to claim 1, characterized in that: Two transmission rods (13) are provided, and the two transmission rods (13) are symmetrically arranged on both sides of the main shaft (3).

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