Ankle-foot prosthesis structure with shock absorption

Abstract

This utility model discloses a foot prosthesis structure with shock absorption function, belonging to the field of foot prosthesis technology. It aims to solve the technical problem of insufficient shock absorption in current foot prostheses, which not only affects the overall shock absorption performance of the prosthesis but also reduces the user's walking comfort. The structure includes a shock absorption mechanism and a foot frame mounted on the shock absorption mechanism. The shock absorption mechanism comprises a circular column and a rectangular column at the lower end of the circular column. A lifting port is provided on the side end of the rectangular column, and a lifting block is slidably installed within the lifting port. Shock-absorbing springs are symmetrically installed on both sides of the lifting block. A second shock absorber is installed at the lower end of the rectangular column. The foot frame includes a shock-absorbing frame rotatably mounted at the lower end of the second shock absorber. This utility model has the advantages of facilitating better support of the shoe's internal space when wearing shoes, effectively dispersing the impact force generated during walking, and providing multiple shock absorption and cushioning during walking, effectively improving walking comfort.

Description

Technical Field

[0001] This utility model relates to the field of foot prosthesis technology, and more specifically, to a foot prosthesis structure with shock absorption function. Background Technology

[0002] Foot prostheses are important assistive devices that help people with limb loss regain their ability to walk. Their ingenious design often incorporates a variety of advanced materials and technologies. Some prostheses use carbon fiber for the main structure, combining lightweight and high strength, effectively reducing the burden on the user, and possessing good elasticity to simulate normal foot movement and achieve shock absorption.

[0003] Currently, most foot prostheses are arch-shaped, with shock absorption primarily concentrated in the heel area to cushion the impact upon landing. However, during actual walking, the forefoot also experiences significant pressure and impact. Current prostheses lack adequate shock absorption measures in this area, resulting in insufficient shock absorption and impact on the overall shock absorption performance of the prosthesis, as well as reduced user walking comfort. Therefore, we propose a foot prosthesis structure with integrated shock absorption functionality. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a foot prosthesis structure with shock absorption function to solve the technical problem that the current foot prosthesis has insufficient shock absorption effect, which not only affects the overall shock absorption performance of the prosthesis, but also reduces the user's walking comfort.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a foot prosthesis structure with shock absorption function, including a shock absorption mechanism and a foot frame installed on the shock absorption mechanism. The shock absorption mechanism includes a circular column and a rectangular column at the lower end of the circular column. A lifting port is opened on the side end of the rectangular column. A lifting block is slidably installed in the lifting port. A circular hole is opened on the side end of the lifting block. The circular hole is arc-shaped from left to right. Shock-absorbing springs are symmetrically installed on both sides of the lifting block. The shock-absorbing springs are arc-shaped along the long axis and are located outside the circular hole. A second shock absorber is installed at the lower end of the rectangular column. The foot frame is made of carbon fiber. The foot frame includes a shock-absorbing frame rotatably installed at the lower end of the second shock absorber.

[0006] Preferably, the inner wall of the lifting port is symmetrically provided with limiting grooves, the front end and rear end of the lifting block are provided with limiting sliders, the limiting sliders are slidably disposed in the limiting grooves, and the upper end of the lifting block is equipped with a first shock absorber connected to the inner wall of the lifting port. The first shock absorber and the second shock absorber both include a spring and a damper, and the damper is located inside the spring.

[0007] Preferably, the foot frame has the shape of an insole when viewed from above and below, and the height of the foot frame gradually increases from the toe to the heel.

[0008] Preferably, the shock absorber frame has a first bend, a second bend, and a third bend from bottom to top. The first bend and the second bend form the shock absorber frame into a Z-shape, and the third bend is inclined downwards.

[0009] Preferably, a first buffer plate and a second buffer plate are respectively provided in the Z-shaped opening of the shock absorber, the first buffer plate is located on the lower side of the second buffer plate, and both the first buffer plate and the second buffer plate are S-shaped.

[0010] Preferably, the upper front part of the shock absorber is provided with a downwardly curved fourth buffer plate, which is curved in a C-shape, and the lower front part of the shock absorber is provided with a third buffer plate, which is S-shaped.

[0011] Preferably, a buffer rod is installed at the upper end of the shock absorber frame. The buffer rod is semi-circular in shape, located inside a circular hole, and the shock-absorbing spring is located outside the buffer rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model designs a foot frame structure with a gradually increasing height from the toe to the heel, resembling an insole shape when viewed from above and below. This design height conforms to the biomechanical structure of the human foot, facilitating shoe wearing without the need for additional auxiliary structures. Furthermore, it better supports the space inside the shoe and effectively disperses the impact force generated during walking, improving walking comfort. The foot frame also includes a Z-shaped shock-absorbing frame, S-shaped first, second, and third buffer plates, and a C-shaped fourth buffer plate, which respectively dampen the heel and forefoot. Combined with the shock-absorbing mechanism, it effectively addresses the impact force on different parts of the foot, compensating for the insufficient shock absorption at the forefoot of traditional prosthetics. This significantly improves the overall shock absorption performance of the prosthesis, solving the problem of insufficient shock absorption in current foot prostheses, which not only affects the overall shock absorption performance of the prosthesis but also reduces the user's walking comfort.

[0014] 2. This utility model also incorporates a shock-absorbing spring and a buffer rod structure. When the foot frame is used for shock absorption, the buffer rod will compress the shock-absorbing spring to further improve the shock absorption performance. At this time, whether the heel or the front of the foot is under pressure, there will be an angle rotation similar to that of the ankle, which allows the foot frame to maintain stable contact with the ground while improving walking comfort and ensuring the stability of the foot prosthesis in ground support. Attached Figure Description

[0015] Figure 1This is a front view structural diagram of the present utility model;

[0016] Figure 2 This is a front view structural diagram of the foot frame of this utility model;

[0017] Figure 3 This is a top view of the foot frame structure of this utility model;

[0018] Figure 4 This is a front view structural diagram of the shock absorption mechanism of this utility model;

[0019] Figure 5 This is a cross-sectional view of the shock absorption mechanism of this utility model;

[0020] Figure 6 This is a schematic diagram of the lifting block structure of this utility model.

[0021] The following are the labels in the diagram: 100, shock absorption mechanism; 101, circular column; 102, rectangular column; 103, lifting port; 104, lifting block; 105, circular hole; 106, shock absorption spring; 107, first shock absorber; 108, second shock absorber; 200, foot frame; 201, shock absorption frame; 202, first buffer plate; 203, second buffer plate; 204, third buffer plate; 205, fourth buffer plate; 206, buffer rod. Detailed Implementation

[0022] like Figures 1 to 6 As shown, this utility model relates to a foot prosthesis structure with shock absorption function, including a shock absorption mechanism 100 and a foot frame 200 installed on the shock absorption mechanism 100. The shock absorption mechanism 100 includes a circular column 101 and a rectangular column 102 at the lower end of the circular column 101. A lifting port 103 is opened on the side end of the rectangular column 102. A lifting block 104 is slidably installed in the lifting port 103. A circular hole 105 is opened on the side end of the lifting block 104. The circular hole 105 is arc-shaped from left to right. Shock-absorbing springs 106 are symmetrically installed on both sides of the lifting block 104. The shock-absorbing springs 106 are arc-shaped along the long axis and are located outside the circular hole 105. A second shock absorber 108 is installed at the lower end of the rectangular column 102. The foot frame 200 is made of carbon fiber and includes a shock-absorbing frame 201 rotatably installed at the lower end of the second shock absorber 108. This invention features a special foot prosthesis shock absorption structure that allows for better support of the shoe interior when wearing shoes, effectively dispersing the impact force generated during walking. It also provides multiple shock absorption and cushioning during walking, effectively improving walking comfort.

[0023] Specifically, the inner wall of the lifting port 103 is symmetrically provided with limiting grooves, and the front and rear ends of the lifting block 104 are provided with limiting sliders. The limiting sliders are slidably disposed within the limiting grooves. A first shock absorber 107 connected to the inner wall of the lifting port 103 is installed at the upper end of the lifting block 104. Both the first shock absorber 107 and the second shock absorber 108 include a spring and a damper, with the damper located inside the spring. The first shock absorber 107 and the second shock absorber 108 are designed to buffer the impact force transmitted from the foot frame 200, effectively providing shock absorption for the foot prosthesis.

[0024] Furthermore, the foot frame 200 has an insole-like shape when viewed from above and below, with its height gradually increasing from the toe to the heel. This insole-like shape and gradual increase in height from toe to heel conforms to the biomechanical structure of the human foot. This design facilitates shoe wearing without requiring additional support structures, better supports the internal space of the shoe, and effectively disperses the impact force generated during walking, thus improving walking comfort.

[0025] Furthermore, the shock absorber 201 has a first bend, a second bend, and a third bend from bottom to top. The first and second bends form a Z-shape with the shock absorber 201, and the third bend is inclined downwards. When the heel contacts the ground, the Z-shaped arrangement of the shock absorber 201 can deform to provide shock absorption and cushioning at the heel.

[0026] It is worth noting that a first buffer plate 202 and a second buffer plate 203 are respectively installed inside the Z-shaped opening of the shock absorber 201. The first buffer plate 202 is located on the lower side of the second buffer plate 203, and both the first buffer plate 202 and the second buffer plate 203 are S-shaped. The S-shaped arrangement of the first buffer plate 202 and the second buffer plate 203 can deform to bear the impact force transmitted by the shock absorber 201, thereby providing secondary shock absorption at the heel.

[0027] It is worth mentioning that the upper front part of the shock absorber 201 is equipped with a downward-curving fourth buffer plate 205, which is C-shaped. The lower front part of the shock absorber 201 is equipped with a third buffer plate 204, which is S-shaped. When the forefoot contacts the ground, the third buffer plate 204 and the fourth buffer plate 205 can deform to cushion the impact force on the forefoot, thus providing shock absorption.

[0028] It is worth noting that a buffer rod 206 is installed at the upper end of the shock-absorbing frame 201. The buffer rod 206 is semi-circular and located inside the circular hole 105, with the shock-absorbing spring 106 located on the outside of the buffer rod 206. When the foot frame 200 performs shock absorption, the buffer rod 206 compresses the shock-absorbing spring 106 to absorb shock and further improve shock absorption performance. At this time, whether the heel or the forefoot is compressed, there will be an angle rotation similar to that of the ankle, ensuring the stability of the foot prosthesis with ground support.

[0029] Working Principle: This embodiment provides a foot prosthesis structure with shock absorption function. This invention is used by installing it with a leg sleeve. The foot frame 200, viewed from above and below, resembles an insole, facilitating shoe wearing. The gradually increasing height from the toe to the heel expands the space inside the shoe, eliminating the need for additional shoe-wearing structures. When the user walks wearing this shock-absorbing foot prosthesis, the lower end of the shock-absorbing frame 201, as well as the third and fourth buffer plates 204 and 205, first contact the ground. When the heel is compressed, the Z-shaped shock absorption of the shock-absorbing frame 201 provides initial shock absorption, followed by secondary cushioning through the first and second buffer plates 202 and 203 within the shock-absorbing frame 201. Furthermore, it can be further cushioned by the shock-absorbing mechanism 100. When the forefoot is compressed, the S-shaped shock absorption of the third buffer plate 204 and the C-shaped shock absorption of the fourth buffer plate 205 provide cushioning. Additionally, the upward deformation of the front of the shock-absorbing frame 201 under pressure provides compression and shock absorption. Spring 106 provides secondary cushioning, during which the foot frame 200 rotates at an angle (like the ankle). Supported by the cushioning rod 206, the heel points downwards. Similarly, when the heel is stressed, the forefoot supports downwards, ensuring the stability of the foot frame 200 against the ground. The height of the foot frame 200 gradually increases from the toe to the heel, a design that conforms to the biomechanical structure of the human foot and disperses impact force. When the foot frame 200 contacts the ground for shock absorption, the impact force is transmitted to the shock absorption mechanism 100. In the shock absorption mechanism 100, the second shock absorber 108 at the lower end of the rectangular column 102 first cushions the impact force. At the same time, the impact force causes the lifting block 104 to slide upwards within the lifting port 103. The first shock absorber 107 at the upper end of the lifting block 104 also cushions its movement, further reducing the impact force. Under the action of multiple shock absorption and cushioning, the user is provided with a more comfortable, stable, and shock-absorbing walking experience.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A foot prosthesis structure with shock absorbing function, characterized by, The system includes a shock-absorbing mechanism (100) and a foot frame (200) mounted on the shock-absorbing mechanism (100). The shock-absorbing mechanism (100) includes a circular column (101) and a rectangular column (102) at the lower end of the circular column (101). A lifting port (103) is provided on the side end of the rectangular column (102). A lifting block (104) is slidably installed in the lifting port (103). A circular hole (105) is provided on the side end of the lifting block (104). The circular hole (105) is arranged from left to right. The lifting block (104) is symmetrically equipped with shock-absorbing springs (106) on both sides. The shock-absorbing springs (106) are arc-shaped along the long axis and are located outside the circular hole (105). The lower end of the rectangular column (102) is equipped with a second shock absorber (108). The foot frame (200) is made of carbon fiber and includes a shock-absorbing frame (201) rotatably mounted on the lower end of the second shock absorber (108).

2. The foot prosthesis structure with a shock absorbing function according to claim 1, characterized in that, The inner wall of the lifting port (103) is symmetrically provided with limiting grooves. The front end and rear end of the lifting block (104) are provided with limiting sliders. The limiting sliders are slidably disposed in the limiting grooves. The upper end of the lifting block (104) is equipped with a first shock absorber (107) connected to the inner wall of the lifting port (103). The first shock absorber (107) and the second shock absorber (108) both include a spring and a damper. The damper is located inside the spring.

3. The foot prosthesis structure with a shock absorbing function according to claim 2, characterized in that, The foot frame (200) has the shape of an insole when viewed from above and below, and the height of the foot frame (200) gradually increases from the toe to the heel.

4. The foot prosthesis structure with a shock absorbing function according to claim 3, characterized in that, The shock absorber frame (201) has a first bend, a second bend and a third bend from bottom to top. The first bend and the second bend form a Z-shape for the shock absorber frame (201), and the third bend is inclined downwards.

5. The foot prosthesis structure with a shock absorbing function according to claim 4, characterized in that, The shock absorber (201) has a first buffer plate (202) and a second buffer plate (203) respectively installed in the Z-shaped opening. The first buffer plate (202) is located on the lower side of the second buffer plate (203). Both the first buffer plate (202) and the second buffer plate (203) are S-shaped.

6. A foot prosthesis structure with shock absorption function according to claim 5, characterized in that, The upper front part of the shock absorber (201) is provided with a downwardly curved fourth buffer plate (205), which is curved in a C-shape. The lower front part of the shock absorber (201) is provided with a third buffer plate (204), which is S-shaped.

7. A foot prosthesis structure with shock absorption function according to claim 6, characterized in that, The upper end of the shock absorber (201) is equipped with a buffer rod (206), which is semi-circular in shape. The buffer rod (206) is located inside the circular hole (105), and the shock absorber spring (106) is located outside the buffer rod (206).

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