Locking device for connecting 3D printing thigh and shank receiving cavity and silicon rubber case lock

Abstract

The utility model relates to the technical field of medical instruments, in particular to a locking device for connecting a 3D printing thigh and shank receiving cavity with a silicon rubber case lockset, which is characterized by comprising a screw cap groove, a screw cap piece and a double-sided threaded connecting piece, the screw cap groove is positioned on the inner side of the bottom of a receiving cavity main body and is used for embedding the screw cap piece, and the double-sided threaded connecting piece is positioned on the inner side of the bottom of the receiving cavity main body. A first through hole is formed in the cap screwing piece, the inner side of the double-face threaded connecting piece is in threaded connection with the cap screwing piece, the outer side of the double-face threaded connecting piece is in threaded connection with the inner side of the bottom of the receiving cavity body, and the bottom of the double-face threaded connecting piece is in threaded connection with a silicon rubber case lock. The mode of combining threaded connection, butt clamp connection and glue bonding is adopted, the bonding strength of the 3D printing prosthetic socket and the silica gel sleeve lock is effectively enhanced, and the 3D printing prosthetic socket is stable, durable, convenient to assemble and suitable for prosthetic lock needles of various length specifications. The integral design of a split structure is adopted, exposure of metal pieces is reduced, and the overall attractiveness of the artificial limb is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a locking device for connecting 3D-printed calf and leg receiving cavities with a silicone sleeve lock. Background Art

[0002] Prosthetic limbs are artificial prostheses designed, manufactured, and assembled using engineering techniques to compensate for amputees or incomplete limb loss. Existing prosthetic sockets are mostly made of resin and connect to the patient's limb by wrapping around a pyramidal prong or a connecting plate. Current prosthetic sockets manufactured using additive manufacturing processes cannot contain pyramidal prongs or connecting plates, making them unsuitable for this connection solution. There is an urgent need for an adaptable connection solution that is easy to assemble, stable, and durable.

[0003] A Chinese utility model patent with authorization publication number CN 204562473 U discloses a prosthetic socket with a double-layer composite structure, wherein the prosthetic socket is a double-layer composite structure, including an inner layer and an outer layer of the prosthetic socket. The double-layer composite structure of the prosthetic socket is a detachable structure, connected together by threaded knobs with handles evenly distributed along the circumference of the upper end of the prosthetic socket and internal threaded holes embedded in the inner layer of the prosthetic socket. However, the connection method of the prosthetic socket is inconvenient to disassemble, and openings and gaps are opened on the side surface of the prosthetic socket, causing the patient to easily make noise when walking. Moreover, the connection structure is exposed to the outside, which is neither safe nor aesthetically pleasing.

[0004] Therefore, the prior art lacks a connection mechanism that is easy to disassemble and securely connected. Utility Model Content

[0005] To address the aforementioned deficiencies or improvements in the existing technology, the present invention provides a locking device for connecting 3D-printed calf and femoral prosthesis sockets to a silicone sleeve lock. This device aims to provide patients with an easily assembled, stable, and durable connection mechanism between the prosthetic socket and the silicone sleeve lock, thereby resolving the technical issues of complex disassembly and unstable connection of 3D-printed calf and femoral prosthesis sockets. The detailed technical solution of this utility model is described below.

[0006] The utility model protects a locking device for connecting 3D printed calf and leg receiving cavities with a silicone sleeve lock, comprising a screw cap groove, a screw cap piece and a double-sided threaded connector. The screw cap groove is located on the inner side of the bottom of the receiving cavity body and is used to embed the screw cap piece. A first through hole is provided in the screw cap piece. The inner side of the double-sided threaded connector is threadedly connected to the screw cap piece, and the outer side of the double-sided threaded connector is threadedly connected to the inner side of the bottom of the receiving cavity body. The bottom of the double-sided threaded connector is threadedly connected to the silicone sleeve lock.

[0007] Preferably, the top surface of the rotary cover is a concave spherical surface, the outer wall of the first through hole is provided with a thread, and circular concave holes are provided on both sides of the first through hole.

[0008] Preferably, a second through hole is provided in the double-sided threaded connector, and both the inner wall and the outer wall of the second through hole are provided with threads.

[0009] Preferably, a third through hole is provided in the screw cap groove, and a thread is provided on the inner wall of the third through hole.

[0010] Preferably, a locking opening is provided at one end of the double-sided threaded connector, screw holes are provided at both ends of the locking opening, and threads are provided on inner walls of the screw holes.

[0011] Preferably, the inner walls of the second through hole, the third through hole and the screw hole are all coated with glue or epoxy resin.

[0012] Preferably, the double-sided threaded connector and the screw cap are both made of alloy materials including aluminum alloy, titanium alloy or magnesium alloy.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model adopts a combination of threaded connection, clamping connection and glue bonding to effectively enhance the bonding strength between the 3D printed prosthetic socket and the silicone sleeve lock. It is stable, durable and easy to assemble, and is suitable for prosthetic locking pins of various lengths and specifications.

[0015] (2) The overall design adopts a split structure and an integrated design to reduce the exposure of metal parts and improve the overall aesthetics of the prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main view of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 It is a top view of the utility model without the screw cover installed;

[0019] Figure 4 It is a three-dimensional diagram of the double-sided threaded connector of the present utility model;

[0020] Figure 5 It is a three-dimensional diagram of the screw cap of the utility model;

[0021] Figure 6 It is a three-dimensional diagram of the silicone sleeve lock of the utility model;

[0022] Figure 7 It is a cross-sectional view of the utility model without the silicone sleeve installed.

[0023] In the figure: 1. Receiving cavity body; 2. Screw cap; 2-1. First through hole; 2-2. Circular concave hole; 3. Double-sided threaded connector; 3-1. Second through hole; 3-2. Locking mouth; 3-3. Screw hole; 4. Screw cap groove; 4-1. Third through hole; 5. Silicone sleeve lock. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0025] The utility model protects a locking device for connecting a 3D printed leg and thigh receiving cavity with a silicone sleeve lock, such as Figure 1 — Figure 7 As shown, it includes a screw cap groove 4, a screw cap member 2 and a double-sided threaded connector 3. The screw cap groove 4 is located on the inner side of the bottom of the receiving cavity body 1 and is used to embed the screw cap member 2. A first through hole 2-1 is provided in the screw cap member 2. The inner side of the double-sided threaded connector 3 is threadedly connected to the screw cap member 2. The outer side of the double-sided threaded connector 3 is threadedly connected to the inner side of the bottom of the receiving cavity body 1. The bottom of the double-sided threaded connector 3 is threadedly connected with a silicone sleeve lock 5.

[0026] As a preferred embodiment, the top surface of the screw cap 2 is a concave spherical surface, the outer wall of the first through hole 2-1 is provided with threads, and circular concave holes 2-2 are provided on both sides of the first through hole 2-1 for rotating and tightening the screw cap 2.

[0027] As a preferred embodiment, a second through hole 3-1 is opened in the double-sided threaded connector 3, and the inner wall and outer wall of the second through hole 3-1 are both provided with threads, the outer wall is threadedly connected to the bottom of the receiving cavity body 1, and the inner wall is threadedly connected to the silicone sleeve lock 5.

[0028] As a preferred embodiment, a third through hole 4 - 1 is defined in the screw cap groove 4 , and a thread is provided on the inner wall of the third through hole 4 - 1 for connection with the thread of the screw cap member 2 .

[0029] As a preferred embodiment, a locking opening 3-2 is provided at one end of the double-sided threaded connector 3, screw holes 3-3 are provided at both ends of the locking opening 3-2, and the inner wall of the screw hole 3-3 is provided with threads for tightening or loosening the double-sided threaded connector 3.

[0030] As a preferred embodiment, the inner wall threads of the second through hole 3-1, the third through hole 4-1 and the screw hole 3-3 are all coated with glue or epoxy resin so as to bond with the corresponding structural parts.

[0031] As a preferred embodiment, the double-sided threaded connector 3 and the screw cap 2 are both made of alloy materials including aluminum alloy, titanium alloy or magnesium alloy, which are cheap, easy to source, and have good fatigue resistance and impact resistance.

[0032] During use, the patient first places the prosthetic silicone sleeve wrapped around the residual limb into the receiving cavity body 1, and the locking pin of the prosthetic silicone sleeve passes through the first through hole 2-1 in the screw cap 2, the third through hole 4-1 in the receiving cavity body 1, and the second through hole 3-1 in the double-sided threaded connector 3 in sequence. A screw cap groove 4 is provided on the inner side of the bottom of the receiving cavity body 1, which is connected to the top of the double-sided spiral connector 3 through the embedded screw cap 2. The mutual engagement and clamping design are conducive to enhancing the connection strength between the receiving cavity body 1 and the silicone sleeve lock 5 to form a clamping force. The bottom of the receiving cavity body 1 is threadedly connected to the double-sided threaded connector 3 to form a screwing force. The double-sided threaded connector 3 and the screw cap 2 are both made of alloy material, which is cheap, easy to source raw materials, and has good fatigue resistance and impact resistance. The inner wall and outer wall of the second through hole 3-1 in the double-sided threaded connector 3 are both provided with threads. The outer wall is threadedly connected to the bottom of the receiving cavity body 1, and the upper and lower sides of the inner wall are threadedly connected to the screw cap 2 and the silicone sleeve lock 5 respectively. The inner wall of the screw hole 3-3 at one end of the double-threaded connector 3 is threaded for connection with a bolt, facilitating tightening or loosening of the double-threaded connector 3. This enhances the friction between the double-threaded connector 3 and the silicone sleeve lock 5, allowing adjustment of the silicone sleeve lock's insertion depth and frontal orientation according to actual conditions. The inner threads of the second through hole 3-1 and the third through hole 4-1 are coated with glue or epoxy resin to create adhesion with the corresponding structural components, ensuring stability and durability. This achieves a fully integrated design of the split structure, reducing exposed metal parts and improving the aesthetics of the prosthesis.

[0033] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements 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 locking device for connecting 3D printed thigh and calf sockets with a silicone sleeve lock, characterized in that: It includes a screw cap groove, a screw cap part and a double-sided threaded connector. The screw cap groove is located on the inner side of the bottom of the receiving cavity body and is used to embed the screw cap part. A first through hole is opened in the screw cap part. The inner side of the double-sided threaded connector is threadedly connected to the screw cap part. The outer side of the double-sided threaded connector is threadedly connected to the inner side of the bottom of the receiving cavity body. The bottom of the double-sided threaded connector is threadedly connected with a silicone sleeve lock.

2. A locking device for connecting a 3D printed calf and leg receiving cavity with a silicone sleeve lock according to claim 1, characterized in that: The top surface of the rotary cover is a concave spherical surface, the outer wall of the first through hole is provided with a thread, and circular concave holes are provided on both sides of the first through hole.

3. A locking device for connecting a 3D printed calf and leg receiving cavity with a silicone sleeve lock according to claim 2, characterized in that: A second through hole is provided in the double-sided threaded connector, and both the inner wall and the outer wall of the second through hole are provided with threads.

4. A locking device for connecting a 3D printed calf and leg receiving cavity with a silicone sleeve lock according to claim 3, characterized in that: A third through hole is provided in the screw cap groove, and a thread is provided on the inner wall of the third through hole.

5. A locking device for connecting a 3D printed calf and leg receiving cavity with a silicone sleeve lock according to claim 4, characterized in that: A locking opening is provided at one end of the double-sided threaded connector, screw holes are provided at both ends of the locking opening, and threads are provided on inner walls of the screw holes.

6. The locking device for connecting the 3D printed calf and leg sockets with the silicone sleeve lock according to claim 5, characterized in that: The inner walls of the second through hole, the third through hole and the screw hole are all coated with glue or epoxy resin.

7. The locking device for connecting 3D printed calf and leg sockets with a silicone sleeve lock according to claim 1, characterized in that: The double-sided threaded connector and the screw cap are made of alloy materials including aluminum alloy, titanium alloy or magnesium alloy.

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