Proximal humerus shoulder joint prosthesis

Abstract

The utility model relates to the technical field of proximal humerus shoulder joint prostheses, and discloses a proximal humerus shoulder joint prosthesis, which comprises a backbone end, a joint end, a connecting rod and a connecting rod, the adjusting mechanism is arranged on the lower end surface of the joint end and comprises a bearing arranged in the backbone end, the inner side of an inner ring of the bearing is fixedly connected with a clamping rod, and the surface of the clamping rod is clamped in the joint end; the clamping rod is stably installed in the joint end through the first spring and the pin rod, then stable connection of the joint end and the diaphysis end is guaranteed, angle adjustment of the joint end on the diaphysis end is achieved through the bearing and the clamping rod, operation of adjusting the angle of the joint end on the diaphysis end is simple, and through the second spring and the limiting rod, the joint end can be stably fixed. The clamping rod is positioned in the diaphysis end, locking of angle rotation of the joint end by the diaphysis end is achieved, stability of the joint end after angle adjustment of the diaphysis end is guaranteed, and the problems that in the prior art, when the angle of the joint end on the diaphysis end is adjusted, the failure rate is high, and locking is not convenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of proximal humeral shoulder joint prostheses, and in particular relates to a proximal humeral shoulder joint prosthesis. Background Art

[0002] A prosthetic structure is a man-made structure used to replace the function of a human organ. Common prosthetic structures include tibial prostheses, femoral prostheses, breast prostheses, and knee femoral condyle prostheses. As a type of prosthetic structure, the proximal humeral shoulder prosthesis is a commonly used prosthetic structure in clinical medicine to replace a damaged or painful shoulder joint. It mainly includes components such as the scapula cup, the humeral head, and the middle rod, and is usually made of artificial materials such as high-density polyethylene, titanium alloy, and zirconium alloy. The prosthesis is surgically placed into the shoulder joint to replace damaged tissue and bone structure, allowing the shoulder joint to move again.

[0003] The proximal humeral shoulder joint prosthesis structure is mainly composed of a prosthesis head and a prosthesis handle. Specifically, the utility model with the authorization announcement number CN220370093U discloses a proximal humeral shoulder joint prosthesis, including a joint end and a shaft end, and the shaft end can drive the joint end to rotate; the joint end includes a surgical neck, and the top of the surgical neck is integrally formed with a humeral head, and the bottom of the surgical neck is provided with a truncated cone groove; the shaft end includes a bone replacement end, and a threaded fixing rod is fixedly installed at the bottom of the bone replacement end, and a circular groove is provided at the top of the bone replacement end; when in use, the joint end is clamped on the shaft end through the truncated cone groove, the limiting groove, the limiting protrusion and the truncated cone block, and the angle of the joint end is adjusted through the screw rod, gear, rack and rotating shaft, so that it fits better in the joint position, and the requirements for prosthesis installation are reduced; but in the specific use process, the prosthesis structure still has the following problems:

[0004] 1. Since the above-mentioned prosthesis adjusts the angle of the joint end on the bone end through the screw rod, gear, rack and rotating shaft, this linkage adjustment method can achieve multi-angle adjustment during adjustment, but due to the complex structure during use, once the gears are stuck, the entire prosthesis cannot be adjusted, and the failure rate is relatively high;

[0005] 2. At the same time, since the above structure uses gears and racks to adjust the angle of the joint end on the backbone end, it is difficult to effectively lock the joint end and the backbone end under the action of external force, which makes it difficult to effectively achieve the relative angle positioning of the joint end and the backbone end.

[0006] Therefore, the utility model proposes a novel proximal humeral shoulder joint prosthesis structure to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a proximal humeral shoulder joint prosthesis having the advantages of simple operation for adjusting the angle of the joint end on the bone end, thereby solving the problems of high failure rate and inconvenient locking when adjusting the angle of the joint end on the bone end.

[0009] (II) Technical solution

[0010] In order to achieve the above-mentioned purpose of adjusting the angle of the joint end on the backbone end in a simple manner, the utility model provides the following technical solutions:

[0011] A proximal humeral shoulder joint prosthesis.

[0012] As a preferred solution of the proximal humeral shoulder joint prosthesis described in the utility model, it comprises: a shaft end, a joint end is arranged at the top of the shaft end; an adjustment mechanism, the adjustment mechanism is arranged on the lower end surface of the joint end and is adapted to the shaft end, including a bearing arranged in the shaft end, a clamping rod is fixedly connected to the inner side of the inner ring of the bearing, the upper end of the clamping rod is clamped in the joint end, a first spring is fixedly arranged in the clamping rod, the other end of the first spring is fixedly connected to a pin rod, the other end of the pin rod is adapted to a positioning socket arranged on the inner wall of the joint end, and a ring-shaped limiting groove is also opened at the lower end of the clamping rod, a second spring is fixedly arranged in the shaft end, a limiting rod is arranged at the other end of the second spring, and one end of the limiting rod is clamped in one of the limiting grooves;

[0013] Based on the above technical features: through the first spring and the pin rod, the clamping rod is stably installed in the joint end, thereby ensuring the stability of the connection between the joint end and the backbone end; through the bearing and the clamping rod, the angle adjustment of the joint end on the backbone end is achieved; the operation of adjusting the angle of the joint end on the backbone end is simple, and there is no problem of jamming; through the second spring and the limit rod, the clamping rod is positioned in the backbone end, thereby achieving the locking of the angle rotation of the joint end by the backbone end, thereby ensuring the stability of the joint end after the angle adjustment of the backbone end, and solving the problems existing in the background technology.

[0014] As a preferred solution of the proximal humeral shoulder joint prosthesis of the utility model: a thread groove is formed at one end of the limit rod, and a screw rod is threadedly connected in the thread groove;

[0015] Based on the above technical features: through the screw and the thread groove, the screw is installed on the limit rod, which facilitates the release of the angle lock of the joint end on the shaft end, and ensures that when there is no need to release the lock, the screw is away from the limit rod, so that one end of the limit rod will not protrude on the shaft end, thereby ensuring the comfort of using the proximal humeral shoulder joint prosthesis.

[0016] As a preferred solution of a proximal humeral shoulder joint prosthesis described in the utility model: a limiting block is provided on the surface of the clamping rod, and the surface of the limiting block is slidably connected to the inside of the joint end; an extension block is fixedly connected to the inner wall of the joint end, and the inner side of the limiting block is slidably connected to the surface of the extension block; an extension block is provided inside the joint end, and the inner side of the limiting block is slidably connected to the surface of the extension block; a round rod is provided on the inner top wall of the joint end, and the surface of the round rod is clamped to the top of the limiting block; protrusions are provided at both the front and rear ends of the limiting block, and the protrusions are clamped in the joint end.

[0017] Based on the above technical features: through the expansion block and the round rod, the limit block and the protrusion of the medical silicone component, the expansion of the limit block in the joint end is achieved, so that the surface of the limit block is stably fitted in the joint end, thereby improving the stability of the connection between the shaft end and the joint end, thereby improving the safety of using the proximal humeral shoulder joint prosthesis.

[0018] As a preferred solution of the proximal humeral shoulder joint prosthesis of the utility model: the limiting block and the protruding block are both medical silicone components.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the utility model provides a proximal humeral shoulder joint prosthesis, which has the following beneficial effects:

[0021] 1. Through the first spring and the pin rod, the clamping rod is stably installed in the joint end, thereby ensuring the stability of the connection between the joint end and the backbone end. Through the bearing and the clamping rod, the angle of the joint end on the backbone end is adjusted. The angle adjustment of the joint end on the backbone end is simple. Through the second spring and the limit rod, the clamping rod is positioned in the backbone end, thereby locking the rotation angle of the joint end by the backbone end, thereby ensuring the stability of the joint end after the backbone end angle is adjusted. At the same time, the joint end and the backbone end are connected by a clamping structure similar to a mortise and tenon joint, thereby avoiding the problem of jamming, that is, ensuring the stability of the structure after adjustment, and reducing the failure rate of the prosthesis structure.

[0022] 2. The screw and the thread groove are used to install the screw on the limit rod, which facilitates the release of the angle lock of the joint end on the bone end. This ensures that when there is no need to release the lock, the screw is away from the limit rod, so that one end of the limit rod does not protrude from the bone end, thereby ensuring the comfort of using the proximal humeral shoulder joint prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the proximal humeral shoulder joint prosthesis of the utility model;

[0024] Figure 2 It is an exploded view of the backbone end and the joint end of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the adjustment mechanism of the utility model;

[0026] Figure 4 It is an exploded view of the adjustment mechanism of the utility model;

[0027] Figure 5 For this utility model Figure 3 A partial enlarged view of point A in the middle.

[0028] In the figure: 1. backbone end; 2. joint end; 21. positioning socket; 3. adjustment mechanism; 31. bearing; 32. clamping rod; 33. first spring; 34. pin rod; 35. limiting groove; 36. limiting rod; 37. second spring; 38. limiting block; 39. protrusion; 310. extension block; 311. round rod; 312. threaded groove; 313. screw rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1: Please refer to Figure 1-5 , the utility model provides a technical solution:

[0031] A proximal humeral shoulder joint prosthesis, comprising:

[0032] A backbone end 1, wherein the top of the backbone end 1 is provided with a joint end 2;

[0033] An adjusting mechanism 3, wherein the adjusting mechanism 3 is arranged on the surface of the joint end 2;

[0034] The adjustment mechanism 3 includes a bearing 31 fixedly connected to the inner wall of the backbone end 1, a clamping rod 32 is fixedly connected to the inner side of the inner ring of the bearing 31, the surface of the clamping rod 32 is clamped in the inner wall of the joint end 2, and a first spring 33 is fixedly connected in the inner wall of the clamping rod 32, the other end of the first spring 33 is fixedly connected to a pin rod 34, and one end of the pin rod 34 is movably clamped in the inner wall of the joint end 2;

[0035] Specifically, when in use, the bottom end of the backbone end 1 abuts against the lower end of the joint end 2, so that the clamping rod 32 is clamped in the backbone end 1. At this time, the elastic force of the first spring 33 pushes the pin rod 34 to move and clamp in the positioning socket 21 on the joint end 2, so that the backbone end 1 and the joint end 2 are fixed.

[0036] As a preferred embodiment, a ring-shaped limit groove 35 is provided at the lower end of the surface of the clamping rod 32, a second spring 37 is fixedly connected to the inner wall of the backbone end 1, and the other end of the second spring 37 is fixedly connected to a limit rod 36, one end of the limit rod 36 is clamped to the inner wall of one of the limit grooves 35, and a thread groove 312 is provided at one end of the limit rod 36, and a screw rod 313 is threadedly connected to the inner wall of the thread groove 312; the screw rod 313 and the limit rod 36 can be made of medical material components, and the specific medical material can be selected according to actual needs;

[0037] Specifically, when in use, the screw rod 313 is pulled, and the screw rod 313 moves to drive the limit rod 36 to move away from the corresponding limit groove 35. At this time, the joint end 2 is rotated to make the joint end 2 rotate to a suitable angle at the backbone end 1, and then the screw rod 313 is loosened, so that the elastic force of the second spring 37 pushes the limit rod 36 to move and engage in the corresponding limit groove 35, so that the rotated joint end 2 is locked in the backbone end 1. At this time, the screw rod 313 is rotated to make the screw rod 313 away from the thread groove 312, so that one end of the limit rod 36 is embedded in the inner wall of the backbone end 1, so that the limit rod 36 does not protrude from the surface of the backbone end 1. At this time, the proximal humeral shoulder joint prosthesis can be installed at the shoulder joint through surgery.

[0038] Example 2: Figure 2-4 As shown, the surface of the clamping rod 32 is fixedly connected with two limit blocks 38, the surface of the limit blocks 38 is slidably connected to the inner wall of the joint end 2, the inner wall of the joint end 2 is fixedly connected with an extension block 310, the inner side of the limit block 38 is slidably connected to the surface of the extension block 310, the inner top wall of the joint end 2 is fixedly connected with a round rod 311, the surface of the round rod 311 is clamped on the top of the limit block 38, the front and rear ends of the limit block 38 are fixedly connected with a protrusion 39, the surface of the protrusion 39 is clamped on the inner wall of the joint end 2, and the limit block 38 and the protrusion 39 are both medical silicone components;

[0039] Specifically, when in use, the bottom end of the joint end 2 is moved closer to the top end of the backbone end 1, the extension block 310 moves inside the limit block 38, and the round rod 311 moves into the limit block 38, so that the protrusion 39 is engaged in the joint end 2, so that the surface of the limit block 38 is stably in contact with the inner wall of the joint end 2, so that the joint end 2 and the backbone end 1 are stably connected.

[0040] When the proximal humeral shoulder joint prosthesis of the utility model is used:

[0041] The top of the backbone end 1 is pressed against the bottom of the joint end 2, so that the clamping rod 32 is clamped in the joint end 2, the expansion block 310 moves inside the limit block 38, and the round rod 311 moves into the limit block 38, so that the protrusion 39 is clamped in the joint end 2, so that the surface of the limit block 38 is stably pressed against the inner wall of the joint end 2, so that the joint end 2 and the backbone end 1 are stably connected. At this time, the elastic force of the first spring 33 pushes the pin rod 34 to move and clamp in the joint end 2, so that the backbone end 1 and the joint end 2 are fixed. At this time, the screw rod 313 is pulled, and the movement of the screw rod 313 drives the limit rod 36 to move away The joint end 2 is away from the corresponding limiting groove 35. At this time, the joint end 2 is rotated to make the joint end 2 rotate to a suitable angle at the backbone end 1, and the screw 313 is loosened. The elastic force of the second spring 37 pushes the limiting rod 36 to move and engage in the corresponding limiting groove 35, so that the rotated joint end 2 is locked in the backbone end 1. At this time, the screw 313 is rotated to make the screw 313 away from the thread groove 312, so that one end of the limiting rod 36 is embedded in the inner wall of the backbone end 1, so that the limiting rod 36 does not protrude from the surface of the backbone end 1. At this time, the proximal humeral shoulder joint prosthesis can be installed at the shoulder joint through surgery.

[0042] It should be noted that the backbone end 1, the joint end 2, the bearing 31, etc. in the above description are all relatively mature devices in existing technology applications. The specific models can be selected according to actual needs and will not be described in detail here.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A proximal humeral shoulder joint prosthesis, characterized in that: include: A backbone end (1), wherein a joint end (2) is provided at the top of the backbone end (1); An adjusting mechanism (3) is arranged on the lower end surface of the joint end (2) and is adapted to the backbone end (1), comprising a bearing (31) arranged in the backbone end (1), a clamping rod (32) is fixedly connected to the inner side of the inner ring of the bearing (31), the upper end of the clamping rod (32) is clamped in the joint end (2), a first spring (33) is fixedly arranged in the clamping rod (32), the other end of the first spring (33) is fixedly connected to a pin rod (34), the other end of the pin rod (34) is adapted to a positioning socket (21) arranged on the inner wall of the joint end (2), and a ring-shaped limiting groove (35) is also provided at the lower end of the clamping rod (32), a second spring (37) is fixedly arranged in the backbone end (1), a limiting rod (36) is provided at the other end of the second spring (37), and one end of the limiting rod (36) is clamped in one of the limiting grooves (35).

2. A proximal humeral shoulder joint prosthesis according to claim 1, characterized in that: A thread groove (312) is formed at one end of the limiting rod (36), and a screw rod (313) is internally threadedly connected to the thread groove (312).

3. The proximal humeral shoulder joint prosthesis according to claim 1, characterized in that: A limit block (38) is provided on the surface of the clamping rod (32), and the surface of the limit block (38) is slidably connected inside the joint end (2).

4. A proximal humeral shoulder joint prosthesis as claimed in claim 3, characterized in that: An expansion block (310) is arranged inside the joint end (2), and the inner side of the limit block (38) is slidably connected to the surface of the expansion block (310).

5. The proximal humeral shoulder joint prosthesis according to claim 3, characterized in that: The inner top wall of the joint end (2) is provided with a round rod (311), and the surface of the round rod (311) is clamped on the top of the limiting block (38).

6. The proximal humeral shoulder joint prosthesis according to claim 3, characterized in that: The front and rear ends of the limit block (38) are both provided with protrusions (39), and the protrusions (39) are snap-fitted into the joint end (2).

7. A proximal humeral shoulder joint prosthesis according to claim 6, characterized in that: The limiting block (38) and the protruding block (39) are both medical silicone components.

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