Prosthetic socket for a below-knee ultra-short residual limb

Abstract

The utility model discloses a kind of shank ultra-short residual limb prosthesis receiving cavity, including receiving outer cavity, receiving inner cavity is provided in the inside of receiving outer cavity, and it is interference fit between receiving outer cavity and receiving inner cavity;Protective sleeve is assembled in the inside of receiving inner cavity, prestressed buffer sleeve is sleeved on the outside of protective sleeve, and prestressed buffer sleeve is attached with the inner wall of receiving inner cavity Setting;Protective sleeve is assembled in the inside of receiving inner cavity, prestressed buffer sleeve is sleeved on the outside of protective sleeve, and prestressed buffer sleeve is attached with the inner wall of receiving inner cavity Setting;Sunk head screw hole is set in the outer wall of receiving outer cavity, and screw groove is provided on the outer wall of receiving inner cavity;The setting of the shank ultra-short residual limb prosthesis receiving cavity, structure design is reasonable, the case is by setting receiving inner cavity in the inside of receiving outer cavity, the two are attached, and in the connecting place of the two, by the way of sunk head bolt cooperation, fixed, to improve stability, avoid the phenomenon of displacement occurs in the process of using prosthesis.

Description

Technical Field

[0001] This utility model relates to the field of receiving cavity technology, specifically to a receiving cavity for a prosthetic limb with an ultra-short lower leg stump. Background Technology

[0002] Prostheses, also known as artificial limbs, are artificial limbs used by amputees to compensate for the partial function of the missing limb. They include upper limb prostheses and lower limb prostheses. They are often made of materials such as aluminum plates, wood, leather, and plastic, with metal joints. Currently, titanium alloys and carbon fiber materials are the mainstream materials in the prosthesis industry. Prostheses refer to artificial limbs used to replace functional impairments (whether temporary or permanent) or to conceal limb disabilities. In cases of extremely short lower leg stumps, the knee is usually still intact. An extremely short lower leg stump refers to a limb that has been amputated at the lower leg, leaving a short residual limb. However, the amputation is usually below the knee joint, which provides a basis for fitting prostheses and conducting rehabilitation training. However, stability is a significant challenge: the residual limb lacks sufficient length to provide stable support, and the socket needs to be specially designed, such as increasing the embracing force and optimizing the suspension system, to improve the stability of the prosthesis during activities such as walking and prevent it from falling off or wobbling.

[0003] In the prior art, patent number CN202421394762 discloses a full-touch shock-absorbing and decompression prosthetic socket, relating to the field of prosthetic socket technology. This full-touch shock-absorbing and decompression prosthetic socket includes an outer socket, and a protective mechanism for shock absorption and protection is provided inside the outer socket. The protective mechanism includes a limiting block and an inner socket. There are two limiting blocks, which are located at the circumferential ends of the outer socket. The inner socket is located on the inner wall of the outer socket, and the inner wall of the inner socket is provided with multiple rubber plates.

[0004] The aforementioned patent also has some shortcomings. For example, the method of connecting and fixing the inner cavity and outer cavity of the receiver by snap-fit ​​is relatively unstable and is prone to displacement during use. Therefore, the existing technology needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a receiving cavity for a prosthesis for an ultra-short lower leg stump, in order to solve the problem mentioned in the background art of connecting and fixing the inner and outer receiving cavities by snap-fitting, which is relatively unstable and prone to displacement during use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a receiving cavity for a prosthetic limb with an extremely short lower leg, comprising an outer receiving cavity, wherein an inner receiving cavity is provided inside the outer receiving cavity, and the outer receiving cavity and the inner receiving cavity are interference fit;

[0007] The inner cavity of the receiving cavity is fitted with a protective sleeve, and a prestressed buffer sleeve is fitted on the outside of the protective sleeve. The prestressed buffer sleeve is fitted to fit against the inner wall of the receiving cavity.

[0008] The inner wall of the prestressed buffer sleeve is provided with a hook and loop fastener, and the outer wall of the protective sleeve is provided with a hook and loop fastener. The hook and loop fastener and the hook and loop fastener cooperate with each other.

[0009] The outer wall of the receiving outer cavity is provided with a countersunk screw hole, and the outer wall of the receiving inner cavity is provided with a screw groove;

[0010] The protective sleeve has a wearable fabric inside;

[0011] A bolt body is screwed between the countersunk screw hole and the screw groove. A circular groove is provided at the bottom end of the bolt body, and a bolt rod is installed in the circular groove. The bolt rod is screwed into the countersunk screw hole and the screw groove.

[0012] As a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump of this utility model, a fixing ring is installed on the upper outer end of the bolt rod, and an annular pressure plate, a spring, and an annular rubber sheet are fitted on the circumferential surface of the bolt rod.

[0013] As a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump of this utility model, a compression block is installed at the upper edge of the annular rubber sheet.

[0014] As a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump of this utility model, the outer wall of the bolt body is provided with an arc surface, and the surface of the arc surface is provided with anti-slip texture.

[0015] As a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump of this utility model, a limiting ring plate is provided at the top of the inner cavity, and the limiting ring plate is provided at the upper end of the outer cavity.

[0016] In a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump according to this invention, the outer diameter of the limiting ring plate is larger than the outer diameter of the receiving cavity.

[0017] As a preferred embodiment of the prosthetic cavity for an ultra-short lower leg stump of this utility model, a prosthetic connector is provided at the bottom end of the outer cavity.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the design of the receiving cavity for the prosthesis of an ultra-short lower leg stump is reasonable;

[0019] This case improves stability and prevents displacement during prosthesis use by creating an inner cavity inside the outer cavity, fitting the two together, and fixing them at the connection point with countersunk bolts. Attached Figure Description

[0020] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the receiving cavity of this utility model;

[0022] Figure 3 This is a schematic diagram of the protective sleeve of this utility model;

[0023] Figure 4 This is a schematic diagram of the bolt body of this utility model.

[0024] In the diagram: 1. Outer cavity of the receiving device; 2. Inner cavity of the receiving device; 3. Prosthetic connector; 4. Countersunk screw hole; 5. Bolt body; 51. Circular groove; 52. Annular rubber sheet; 53. Bolt rod; 54. Extrusion block; 55. Annular pressure plate; 56. Fixing ring; 57. Spring; 58. Arc surface; 6. Limiting ring plate; 7. Screw groove; 8. Protective sleeve; 9. Wearing fabric; 10. Velcro adhesive surface; 11. Velcro barbed surface; 12. Prestressed buffer sleeve plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution:

[0027] In this technical solution, a receiving cavity for a prosthetic limb with an extremely short lower leg includes an outer receiving cavity 1, and an inner receiving cavity 2 is provided inside the outer receiving cavity 1. The outer receiving cavity 1 and the inner receiving cavity 2 are interference-fitted. A protective sleeve 8 is installed inside the inner receiving cavity 2, and a prestressed buffer sleeve 12 is fitted on the outside of the protective sleeve 8. The prestressed buffer sleeve 12 is fitted to the inner wall of the inner receiving cavity 2. The inner wall of the prestressed buffer sleeve 12 is provided with a hook and loop fastener 11, and the outer wall of the protective sleeve 8 is provided with a hook and loop fastener 10. The hook and loop fastener 11 and the hook and loop fastener 10 are fitted together. A countersunk screw hole 4 is provided on the outer wall of the outer receiving cavity 1, and a screw groove 7 is provided on the outer wall of the inner receiving cavity 2. A bolt body 5 is screwed between the countersunk screw hole 4 and the screw groove 7. A circular groove 51 is provided at the bottom end of the bolt body 5, and a bolt rod 53 is installed in the circular groove 51. The bolt rod 53 is screwed into the countersunk screw hole 4 and the screw groove 7. A wearable fabric 9 is provided inside the protective sleeve 8.

[0028] In this technical solution, the receiving inner cavity 2 is installed inside the receiving outer cavity 1. After the receiving inner cavity 2 is installed inside the receiving outer cavity 1, a protective sleeve 8 is installed inside. A prestressed buffer sleeve 12 is installed between the protective sleeve 8 and the receiving inner cavity 2 for cushioning. The prestressed buffer sleeve 12 is a rubber buffer pad in the prior art: it has good elasticity and wear resistance, can withstand large impact forces, and can maintain stable performance under different temperature and environmental conditions. The prestressed buffer sleeve 12 is fixed by the cooperation of the hook and loop fastener 11 and the hook and loop adhesive surface 10. After the receiving outer cavity 1 and the receiving inner cavity 2 are installed, the countersunk screw holes 4 are aligned with the screw grooves 7, and are thus connected and fixed by the bolt rod 53 in the bolt body 5. The material of the wearing cloth 9 is breathable material, so that the prosthesis has good breathability.

[0029] In some technical solutions, a retaining ring 56 is installed on the upper outer end of the bolt rod 53, and an annular pressure plate 55, a spring 57 and an annular rubber sheet 52 are fitted on the circumferential surface of the bolt rod 53.

[0030] In this technical solution, the annular pressure plate 55 is located above the fixed ring 56, the spring 57 is located above the annular pressure plate 55, and the annular rubber sheet 52 is located below the fixed ring 56.

[0031] In some technical solutions, an extrusion block 54 is installed at the upper edge of the annular rubber sheet 52.

[0032] In this technical solution, the annular pressure plate 55 is pressed downward by the spring 57, and the extrusion block 54 is pressed downward by the annular pressure plate 55, so that the extrusion block 54 further extrudes the edge of the annular rubber sheet 52, thereby improving the sealing effect.

[0033] In some technical solutions, the outer wall of the bolt body 5 is provided with an arc surface 58, and the surface of the arc surface 58 is provided with anti-slip texture.

[0034] In this technical solution, the circular arc surface 58 facilitates the driving of the bolt body 5.

[0035] In some technical solutions, a limiting ring plate 6 is provided at the top of the receiving inner cavity 2, and the limiting ring plate 6 is located at the upper end of the receiving outer cavity 1; the outer diameter of the limiting ring plate 6 is larger than the outer diameter of the receiving outer cavity 1.

[0036] In this technical solution, the position of the receiving inner cavity 2 within the receiving outer cavity 1 can be restricted by the limiting ring plate 6.

[0037] In some technical solutions, a prosthesis connector 3 is provided at the bottom of the receiving cavity 1.

[0038] In this technical solution, the connection is used for the prosthesis.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A receiving cavity for a prosthetic limb with an extremely short lower leg, comprising a receiving cavity (1), characterized in that, The receiving outer cavity (1) is provided with a receiving inner cavity (2), and the receiving outer cavity (1) and the receiving inner cavity (2) are interference fit; The receiving cavity (2) is equipped with a protective sleeve (8), and a prestressed buffer sleeve (12) is fitted on the outside of the protective sleeve (8). The prestressed buffer sleeve (12) is fitted to the inner wall of the receiving cavity (2). The inner wall of the prestressed buffer sleeve (12) is provided with a hook and loop fastener (11), and the outer wall of the protective sleeve (8) is provided with a hook and loop fastener (10). The hook and loop fastener (11) and the hook and loop fastener (10) cooperate with each other. The outer wall of the receiving outer cavity (1) is provided with a countersunk screw hole (4), and the outer wall of the receiving inner cavity (2) is provided with a screw groove (7); The protective sleeve (8) is provided with a wearable cloth (9) inside; A bolt body (5) is screwed between the countersunk screw hole (4) and the screw groove (7). A circular groove (51) is provided at the bottom end of the bolt body (5). A bolt rod (53) is installed in the circular groove (51). The bolt rod (53) is screwed into the countersunk screw hole (4) and the screw groove (7).

2. The prosthetic socket of claim 1, wherein, A retaining ring (56) is installed on the upper outer end of the bolt rod (53), and an annular pressure plate (55), a spring (57) and an annular rubber sheet (52) are fitted on the circumferential surface of the bolt rod (53).

3. The prosthetic socket of claim 2, wherein, An extrusion block (54) is installed at the upper edge of the annular rubber sheet (52).

4. The receiving cavity for a prosthesis for an extremely short lower leg stump according to claim 1, characterized in that, The outer wall of the bolt body (5) is provided with an arc surface (58), and the surface of the arc surface (58) is provided with anti-slip texture.

5. The prosthetic socket of Claim 1, wherein, A limiting ring plate (6) is provided at the top of the receiving inner cavity (2), and the limiting ring plate (6) is provided at the upper end of the receiving outer cavity (1).

6. The prosthetic socket of claim 5, wherein, The outer diameter of the limiting ring plate (6) is larger than the outer diameter of the receiving cavity (1).

7. The prosthetic socket of Claim 1, wherein, The bottom end of the receiving cavity (1) is provided with a prosthesis connector (3).

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