Ankle joint device of artificial limb

Abstract

The utility model belongs to the technical field of medical instruments, and discloses an ankle joint device of an artificial limb, which comprises a base and a joint head hinged with the base through a rotating shaft, the base is connected with a foot plate piece, the joint head is connected with a shank piece, the ankle joint device further comprises a front elastic component and a rear elastic component, the rear elastic assembly is located on the side, close to the heel end of the foot plate piece, of the rotating shaft, the downward ends of the front elastic assembly and the rear elastic assembly are connected with the base, and the upward ends are connected with the joint head. According to the utility model, through the design of the front elastic component and the rear elastic component, the problems of back stretching and bending when the ankle joint of the artificial limb goes up and down steps, walks on a slope and squats are mainly solved, the ankle joint adapts to different weights through a device for adjusting the supporting force, the dynamic performance of the artificial limb is improved, and the comfort and efficiency during walking are improved. The gravity center of a human body can be stabilized to move forwards, and walking is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to an ankle joint device of artificial limb. BACKGROUND

[0002] An artificial limb is a custom-made prosthetic device for amputees or individuals with partial limb loss, designed to restore partial functionality and enhance self-care abilities. These artificial limbs are primarily used for individuals who have lost limbs due to disease, traffic accidents, work injuries, or sports injuries. However, existing artificial limbs face the influence of gravity during walking, often resulting in excessive reaction force on the foot prosthesis during use. This design flaw can cause discomfort and pain for disabled patients, especially at the amputation site. This structure lacking a cushioning mechanism not only reduces the comfort of the artificial limb but can also negatively impact the patient's health. SUMMARY

[0003] The utility model provides an ankle joint device of artificial limb to solve prior art problems.

[0004] To solve the above technical problems, the technical scheme provided by the utility model is:

[0005] An ankle joint device of artificial limb, comprising a base, and a joint head hinged with the base through a rotating shaft, the base is connected with a foot plate, the joint head is connected with a lower leg piece, further comprising a front elastic component and a rear elastic component, the front elastic component is located on one side of the rotating shaft close to the toe end of the foot plate, the rear elastic component is located on one side of the rotating shaft close to the heel end of the foot plate, the front elastic component and the rear elastic component are connected with the base at their downward ends, and are connected with the joint head at their upward ends.

[0006] As a further improvement of the above technical scheme:

[0007] The front elastic component and the rear elastic component each comprise a spring, a fixing piece and an adjusting piece, the two ends of the spring are connected with the fixing piece and the adjusting piece respectively, the fixing piece is connected with the base, and the adjusting piece is connected with the joint head.

[0008] The adjusting piece comprises a threaded stud and a connecting block, one end of the connecting block is connected with the threaded stud, the other end of the connecting block is connected with one end of the spring in the elastic direction, the joint head is provided with a first mounting hole and an adjusting hole in communication, the connecting block is located in the first mounting hole, and the threaded stud is screw-connected with the adjusting hole.

[0009] One end of the threaded stud away from the connecting block is provided with a wrench hole.

[0010] The second mounting hole is arranged on the base, one end of the fixing member is clamped in the second mounting hole and is in threaded connection with the base, and the other end of the fixing member is connected with the other end of the spring in the elastic direction.

[0011] The inner walls of the first mounting hole and the second mounting hole are attached with rubber sleeves, and the fixing member and the connecting block are sleeved in the rubber sleeves.

[0012] As a further improvement of another technical solution:

[0013] The rear elastic assembly comprises a rubber block, one end of the rubber block is clamped in the mounting groove of the base, and the other end of the rubber block abuts against the clamping groove of the joint head.

[0014] The rubber block gradually decreases from the end close to the base to the end close to the joint head.

[0015] The joint head is threadedly provided with a square taper, and the square taper is detachably connected with the lower leg member.

[0016] The base is provided with an arc surface and a groove, the groove is located at the center of the arc surface, the joint head is threadedly connected with a wave bead screw, and the head of the wave bead screw abuts against the arc surface and the groove.

[0017] Compared with the prior art, the prosthetic ankle joint has the following beneficial effects:

[0018] Through the design of the front elastic assembly and the rear elastic assembly, the elasticity and the buffering force of the artificial limb are significantly improved.

[0019] The front elastic assembly is located on the side of the pivot close to the toe end of the foot plate member, one end of the front elastic assembly is connected with the base, and the other end of the front elastic assembly is elastically connected with the joint head, so that the impact force from the ground can be effectively absorbed when walking, the reaction force on the amputation site is reduced, and the discomfort of the patient is reduced.

[0020] The rear elastic assembly is located on the side of the pivot close to the heel end of the foot plate member, one end of the rear elastic assembly is connected with the base, and the other end of the rear elastic assembly is elastically connected with the joint head, so as to provide support and stability for the rear movement.

[0021] The main problem solved by the prosthetic ankle joint is the dorsiflexion and plantarflexion of the prosthetic ankle joint when going up and down stairs, walking on slopes and squatting, and the device for adjusting the supporting force is used to adapt to different body weights, improve the dynamic performance of the artificial limb, and improve the comfort and efficiency when walking. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described in the following are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 is a structural schematic view of the ankle joint device of the prosthesis in embodiment 1.

[0024] Figure 2 is a structural schematic view of the ankle joint device of the prosthesis in embodiment 2.

[0025] Legend:

[0026] 100, foot plate; 1, base; 11, rotating shaft; 12, second mounting hole; 13, mounting groove; 23, clamping groove; 15, fixing screw; 2, joint head; 21, first mounting hole; 211, rubber sleeve; 22, adjusting hole; 24, square taper; 3, front elastic assembly; 31, spring; 32, fixing piece; 33, adjusting piece; 331, stud; 332, connecting block; 333, wrench hole; 4, rear elastic assembly; 5, wave bead screw; 51, ball head. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the following will combine the drawings and the preferred embodiments of the specification to make a more comprehensive and detailed description of the present application, but the protection scope of the present application is not limited to the following specific embodiments.

[0028] Unless otherwise defined, all the professional terms used in the following have the same meaning as that understood by those skilled in the art. The professional terms used in this paper are only for the purpose of describing specific embodiments, and are not intended to limit the protection scope of the present application.

[0029] Unless otherwise specified, the various raw materials, reagents, instruments and equipment used in the present application can be purchased from the market or can be prepared by existing methods.

[0030] Embodiment 1: as Figure 1 and Figure 2As shown, the ankle joint device of the prosthesis in this embodiment includes a base 1 and a joint head 2 hinged to the base 1 via a pivot 11. The base 1 is connected to a footplate 100, and the joint head 2 is connected to a lower leg. It also includes a front elastic component 3 and a rear elastic component 4. The front elastic component 3 is located on the side of the pivot 11 near the toe end of the footplate 100, and the rear elastic component 4 is located on the side of the pivot 11 near the heel end of the footplate 100. The downward-facing ends of both the front and rear elastic components 3 and 4 are connected to the base 1, and their upward-facing ends are connected to the joint head 2. The ankle joint device of the prosthesis in this embodiment significantly improves the elasticity and cushioning force of the prosthesis through the design of the front elastic component 3 and the rear elastic component 4. The front elastic component 3, located on the side of the pivot 11 near the toe end of the footplate 100, has one end connected to the base 1 and the other end elastically connected to the joint head 2, effectively absorbing the impact force from the ground during walking, reducing the reaction force on the amputation site, and thus reducing patient discomfort. The rear elastic component 4 is located on the side of the pivot 11 near the heel end of the footplate 100. It is connected to the base 1 at one end and elastically connected to the joint head 2 at the other, providing support and stability for rearward movement. This design primarily addresses the dorsiflexion and flexion issues of the prosthetic ankle joint when going up and down stairs, walking on slopes, and squatting. By adjusting the support force, it adapts to different body weights, improving the dynamic performance of the prosthesis and enhancing comfort and efficiency during walking. It not only helps to smoothly shift the body's center of gravity forward but also enhances walking ability.

[0031] like Figure 1 As shown, in this embodiment, both the anterior elastic component 3 and the posterior elastic component 4 include a spring 31, a fixing member 32, and an adjusting member 33. The two ends of the spring 31 are connected to the fixing member 32 and the adjusting member 33, respectively. The fixing member 32 is connected to the base 1, and the adjusting member 33 is connected to the joint head 2. The structural design of both the anterior elastic component 3 and the posterior elastic component 4 further enhances the functionality of the prosthesis. Specifically, they consist of a spring 31, a fixing member 32, and an adjusting member 33. The two ends of the spring 31 are connected to the fixing member 32 and the adjusting member 33, respectively, allowing for flexible adjustment. The fixing member 32 is connected to the base 1, ensuring the stability of the components; while the adjusting member 33 is connected to the joint head 2, allowing the anterior elastic component 3 and the posterior elastic component 4 to make adaptive adjustments as needed during walking. This design not only enhances the elasticity of the prosthesis but also effectively absorbs and cushions the impact force from the ground during walking, reducing pressure on the amputation site and thus improving patient comfort and walking stability. Furthermore, by adjusting the settings of the adjustment component 33, users can optimize the response characteristics of the prosthesis according to their individual needs, improve the overall user experience, and achieve a better fit.

[0032] In this embodiment, the adjusting member 33 includes a stud 331 and a connecting block 332. One end of the connecting block 332 is connected to the stud 331, and the other end of the connecting block 332 is connected to one end of the spring 31 in the elastic direction. The joint head 2 is provided with a first mounting hole 21 and an adjusting hole 22 in communication, and the connecting block 332 is located in the first mounting hole 21, and the stud 331 is threadedly connected with the adjusting hole 22. The design of the adjusting member 33 further enhances the adjustability and flexibility of the prosthetic ankle joint device through the combination of the stud 331 and the connecting block 332. One end of the connecting block 332 is connected to the stud 331, and the other end is connected to one end of the spring 31 in the elastic direction. Such a structure can ensure the effectiveness and stability of the spring 31. The joint head 2 is provided with a first mounting hole 21 and an adjusting hole 22 in communication, and the connecting block 332 is located in the first mounting hole 21, so that the whole device is more compact and efficient during use. The threaded connection of the stud 331 and the adjusting hole 22 allows the user to conveniently adjust the position of the connecting block 332, thereby changing the tension and response characteristics of the spring 31. This adjustable mechanism not only allows patients to optimize the performance of the prosthesis according to their own needs, but also improves the ability to adapt to ground impact during walking, reduces discomfort, and enhances overall comfort and stability. Through such a design, the prosthesis can better simulate the feeling of natural walking, improving the quality of life of patients.

[0033] In this embodiment, the end of the stud 331 away from the connecting block 332 is provided with a wrench hole 333. Through the wrench hole 333, the practicality and convenience of the adjusting member 33 are further improved. The setting of the wrench hole 333 allows the user to easily use a wrench or other tools to rotate the stud 331, thereby conveniently adjusting. This convenient adjustment method not only improves the operability of the prosthesis during use, but also allows patients to quickly adjust the tension of the spring 31 according to their own needs and walking environment. Through simple operation, the user can optimize the performance of the prosthesis, ensuring comfort and stability in different activity states, thereby improving the overall use experience and walking efficiency. This humanized design makes the prosthesis more adaptable, meeting the needs of users for individualization and flexibility.

[0034] In this embodiment, the base 1 is provided with a second mounting hole 12, one end of the fixing member 32 is clamped in the second mounting hole 12 and is threadedly connected with the base 1, and the other end of the fixing member 32 is connected with the other end of the spring 31 in the elastic direction. The second mounting hole 12 provides a stable basis for the installation and fixation of the fixing member 32. The one end of the fixing member 32 is connected with the base 1 through threads, ensuring the firmness of the assembly; and the other end of the fixing member 32 is connected with the other end of the spring 31 in the elastic direction, enabling the spring 31 to effectively exert its elastic force and buffering effect. This structural design not only simplifies the installation process, but also enhances the overall structural stability, enabling the prosthesis to better absorb impact force when walking and reducing the pressure on the amputated part. In addition, the provision of the second mounting hole 12 also provides convenience for the maintenance and replacement of the spring 31 and the fixing member 32, allowing users to easily adjust and maintain, thereby prolonging the service life of the prosthesis. Through this design, the functionality and durability of the prosthesis are significantly enhanced, further improving the walking experience and quality of life of patients.

[0035] In this embodiment, rubber sleeves 211 are attached to the inner walls of the first mounting hole 21 and the second mounting hole 12, and the fixing member 32 and the connecting block 332 are both sleeved in the rubber sleeves 211. The rubber sleeves 211 are made of rubber material, which can better protect the fixing member 32 and the connecting block 332, prolong their service life, and also have a buffering effect to reduce noise.

[0036] As shown in Embodiment 2, Figure 2 In this embodiment, the rear elastic assembly 4 includes a rubber block, one end of which is clamped in the mounting groove 13 of the base 1, and the other end of which abuts against the clamping groove 23 of the joint head 2. The rear elastic assembly 4 is composed of a rubber block, which adopts an effective clamping design to further enhance the buffering capacity of the prosthesis. One end of the rubber block is clamped in the mounting groove 13 of the base 1, ensuring its stable fixation and preventing displacement; and the other end of the rubber block abuts against the clamping groove 23 of the joint head 2, forming a reliable connection. This structure enables the rubber block to effectively absorb impact force and vibration during walking, providing additional buffering effect and thus reducing the pressure on the amputated part, improving the comfort and walking stability of patients. In addition, the rubber material itself has good elasticity and wear resistance, which can effectively cope with long-term use and enhance the durability of the prosthesis. Through this design, the rear elastic assembly 4 not only optimizes the dynamic performance of the prosthesis, but also provides a better user experience for patients, making them more independent and confident in their daily lives.

[0037] In this embodiment, the rubber block gradually decreases from the end close to the base 1 to the end close to the joint head 2. The gradual design of the rubber block not only helps to achieve better elasticity and buffering effect, but also can effectively adapt to the mechanical changes during walking. The rubber block is wider and thicker at the end close to the base 1, which can provide stronger support and stability, while the gradually tapered shape towards the joint head 2 allows flexible deformation during walking, effectively absorbing impact force and vibration. This design can achieve smoother motion transition during walking, reduce the pressure on the amputation site, and improve the comfort and safety of the user. In addition, the elastic properties of the rubber material allow this design to adjust freely when dealing with different ground conditions, further improving the adaptability and user experience of the prosthesis. Overall, this gradual structure optimizes the function of the rear elastic component 4, providing a more ideal walking experience for patients.

[0038] In this embodiment, the joint head 2 has a square taper 24, and the square taper 24 is detachably connected with the lower leg part. The detachable connection design of the square taper 24 and the lower leg part further enhances the flexibility and convenience of the prosthesis. The shape of the square taper 24 ensures stable support during connection, while its detachable feature allows the lower leg part to be easily detached and replaced as needed. This design not only facilitates user adjustment of the prosthesis in different situations, but also facilitates cleaning and maintenance, prolonging the service life of the prosthesis. In addition, the close combination of the square taper 24 and the lower leg part can effectively transfer power, ensuring the stability and safety of the prosthesis during walking. Overall, this design makes the use of the prosthesis more humanized, meeting the diverse needs of patients in daily life and improving their independence and user experience.

[0039] In this embodiment, the base 1 is provided with an arc surface and a groove, the groove is located at the center of the arc surface, and the joint head 2 is threadedly connected with a ball screw 5, the ball head 51 of the ball screw 5 abuts against the arc surface and the groove. When the wearer stands, gravity causes the joint head 2 to sink, and the ball head 51 sinks into the groove of the base 1, thereby achieving fixation and ensuring stability when standing. This design effectively prevents accidental sliding and improves safety. When walking, the center of gravity of the wearer moves forward, causing the front elastic component 3 to be compressed, and the ball head 51 rolls out of the groove and begins to move along the arc surface of the base 1. This dynamic change allows the ankle joint device to flexibly respond to gait changes and support natural walking functions. Overall, this design not only improves the functionality of the prosthesis, but also allows the wearer to maintain a stable motion experience during walking, enhancing their confidence and independence in daily life.

[0040] In this embodiment, the base 1 is provided with a fixing screw 15, which fixes the rotating shaft 11 and the base 1, so that the rotating shaft 11 does not rotate relative to the base 1 when the wearer is walking or standing, maintaining the stability of the ankle joint device.

Claims

1. An ankle joint device of a prosthesis, comprising a base (1) and a joint head (2) hinged to the base (1) by a pivot (11), the base (1) being connected to a foot plate member (100), the joint head (2) being connected to a lower leg member, characterized in that, Further comprising a front elastic component (3) and a rear elastic component (4), the front elastic component (3) is located at the side of the rotating shaft (11) close to the toe end of the foot plate (100), the rear elastic component (4) is located at the side of the rotating shaft (11) close to the heel end of the foot plate (100), the downward end of the front elastic component (3) and the rear elastic component (4) are connected with the base (1), and the upward end thereof is connected with the joint head (2).

2. The prosthetic ankle device of claim 1, wherein, The front elastic component (3) and the rear elastic component (4) each comprise a spring (31), a fixing piece (32) and an adjusting piece (33), the two ends of the spring (31) are connected with the fixing piece (32) and the adjusting piece (33) respectively, the fixing piece (32) is connected with the base (1), and the adjusting piece (33) is connected with the joint head (2).

3. The prosthetic ankle device of claim 2, wherein, The adjusting piece (33) comprises a threaded stud (331) and a connecting block (332), one end of the connecting block (332) is connected with the threaded stud (331), and the other end of the connecting block (332) is connected with one end of the spring (31) along the elastic direction, the joint head (2) is provided with a first mounting hole (21) and an adjusting hole (22) in communication, the connecting block (332) is located in the first mounting hole (21), and the threaded stud (331) is threadedly connected with the adjusting hole (22).

4. The prosthetic ankle device of claim 3, wherein, One end of the threaded stud (331) away from the connecting block (332) is provided with a wrench hole (333).

5. The prosthetic ankle device of claim 3, wherein, The base (1) is provided with a second mounting hole (12), one end of the fixing piece (32) is clamped in the second mounting hole (12) and is threadedly connected with the base (1), and the other end of the fixing piece (32) is connected with the other end of the spring (31) along the elastic direction.

6. The prosthetic ankle device of claim 5, wherein, The inner walls of the first mounting hole (21) and the second mounting hole (12) are attached with a rubber sleeve (211), and the fixing piece (32) and the connecting block (332) are sleeved in the rubber sleeve (211).

7. The prosthetic ankle device of claim 1, wherein, The rear elastic component (4) comprises a rubber block, one end of the rubber block is clamped in the mounting groove (13) of the base (1), and the other end of the rubber block abuts against the clamping groove (23) of the joint head (2).

8. The prosthetic ankle device of claim 7, wherein, The rubber block gradually decreases from the end close to the base (1) to the end close to the joint head (2).

9. The prosthetic ankle device of claim 1, wherein, The joint head (2) is threadedly provided with a square taper (24), and the square taper (24) is detachably connected with the lower leg part.

10. The prosthetic ankle device of any one of claims 1-9, wherein, The base (1) is provided with an arc surface and a groove, the groove is located at the center of the arc surface, the joint head (2) is threadedly connected with a wave bead screw (5), and the ball head (51) of the wave bead screw (5) abuts against the arc surface and the groove.

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