Hip joint prosthesis

Abstract

The application provides a hip joint prosthesis, which comprises a first end of a first stem body connected with a ball head part, an accommodating space arranged in the inside of the first stem body, a first mounting port and a second mounting port arranged on the side wall of the first stem body, an operation hole arranged on the top of the first stem body and communicated with the accommodating space, a moving piece movably arranged in the accommodating space, a first transmission piece and a second transmission piece both movably connected with the moving piece, the moving piece moving being capable of driving the first transmission piece and the second transmission piece to move close to or away from each other, a first pressing piece connected with the first transmission piece and located outside the first mounting port, and a second pressing piece connected with the second transmission piece and located outside the second mounting port; and an adjusting piece penetrating through the operation hole and driving the moving piece to move. The technical scheme of the application effectively solves the problem of insufficient stability of the hip joint prosthesis after implantation in the related art.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a hip joint prosthesis. Background Technology

[0002] In total hip arthroplasty, the traditional fixation principle of biological femoral stems is achieved through proximal wedge-shaped compression fitting and long-term fixation through layers or trabecular mesh structures on the proximal surface of the wedge-shaped structure. However, in the initial implantation stage where there is no proximal bone ingrowth, a long rod structure at the distal end of the femoral stem is needed for auxiliary fixation to ensure the stability of the prosthesis in the early stages of implantation.

[0003] However, due to individual patient differences, the proximal end of the traditional biological femoral stem can only be made into a fixed shape and size. The proximal end of the prosthesis cannot perfectly match the proximal end of the patient's femur, which requires high bone quality, surgical planning and surgical technique, and may result in insufficient initial stability and failure of bone ingrowth. Summary of the Invention

[0004] The main objective of this invention is to provide a hip joint prosthesis to solve the problem of insufficient stability after implantation of hip joint prostheses in related technologies.

[0005] To achieve the above objectives, the present invention provides a hip joint prosthesis, comprising: a ball head; a first stem, the first end of which is connected to the ball head, the first stem having an internal accommodating space, a first mounting port and a second mounting port on the side wall of the first stem, the first mounting port and the second mounting port being located on opposite sides of the accommodating space and both communicating with the accommodating space, and an operating hole on the top of the first stem communicating with the accommodating space; a movable member movably disposed within the accommodating space; a first transmission member and a second transmission member, both movably connected to the movable member, the first transmission member being disposed at the first mounting port and the second transmission member being disposed at the second mounting port, the movement of the movable member causing the first transmission member and the second transmission member to move closer to or further away from each other; a first pressing member and a second pressing member, the first pressing member being connected to the first transmission member and located outside the first mounting port, and the second pressing member being connected to the second transmission member and located outside the second mounting port; and an adjusting member passing through the operating hole, the adjusting member driving the movable member to move.

[0006] Furthermore, the first mounting port and the second mounting port are symmetrically arranged relative to the moving member. The moving member is provided with a first drive shaft and a second drive shaft. The first drive member is provided with a first drive groove, which is inclined and has a first end near the first pressing member and a second end near the second pressing member. The distance between the first end of the first drive groove and the end of the first handle facing the ball head is greater than the distance between the second end of the first drive groove and the end of the first handle facing the ball head. The first drive shaft is inserted into the first drive groove. The second drive member is provided with a second drive groove, which is inclined and has a first end near the first pressing member and a second end near the second pressing member. The distance between the first end of the second drive groove and the end of the first handle facing the ball head is less than the distance between the second end of the second drive groove and the end of the first handle facing the ball head. The second drive shaft is inserted into the second drive groove.

[0007] Furthermore, the moving component includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence; a first drive shaft is disposed on the first sidewall; a second drive shaft is disposed on the third sidewall; the first transmission component includes a first connecting plate and a first universal joint connector; a first transmission groove is disposed on the first connecting plate and located on the outside of the first sidewall; and / or, the second transmission component includes a second connecting plate and a second universal joint connector; a second transmission groove is disposed on the second connecting plate and located on the outside of the third sidewall.

[0008] Furthermore, a first guide groove and a second guide groove are provided on the side wall of the first handle, the first drive shaft is inserted into the first guide groove, and the second drive shaft is inserted into the second guide groove.

[0009] Furthermore, the moving part is also provided with a first guide post and a second guide post. The first guide post is provided on the first side wall, and the second guide post is provided on the third side wall. The first guide post is inserted into the first guide groove, and the second guide post is inserted into the second guide groove.

[0010] Furthermore, the hip joint prosthesis also includes a second stem body, which is hinged to the second end of the first stem body. The first stem body has a first connecting hole on the side facing the second stem body. The hip joint prosthesis also includes a limiting member, which is movably inserted into the first connecting hole. The second stem body has a limiting engagement part on the side facing the first stem body. The limiting member is connected to a moving member. When the moving member moves, it can drive the limiting member to engage with the limiting engagement part.

[0011] Furthermore, the limiting member includes a limiting block, an elastic member is provided between the limiting block and the moving member, the limiting block is provided with a tooth on the side facing the limiting mating part, the limiting mating part is an arc-shaped rack part, and the tooth can lock into the arc-shaped rack part.

[0012] Furthermore, the hip joint prosthesis also includes an anti-dislodgement component. The limiting block is provided with a second connecting hole. The anti-dislodgement component passes through the second connecting hole and is fixedly connected to the moving component. The limiting block can be retracted relative to the moving component.

[0013] Furthermore, the adjusting component includes a screw, and the operating hole is a threaded hole. The screw passes through the threaded hole and is rotatably connected to the moving component, and abuts against the moving component.

[0014] Furthermore, a third connecting hole is provided on the side wall of the first handle, which is connected to the operating hole. The hip joint prosthesis also includes a protruding member, which is movably disposed in the third connecting hole. The screw has a conical surface, and when the screw moves toward the moving member, the conical surface can push against the protruding member to make the protruding member extend out of the third connecting hole.

[0015] Applying the technical solution of this invention, the first end of the first handle is connected to the ball head, a receiving space is provided inside the first handle, a first mounting port and a second mounting port are provided on the side wall of the first handle, and an operating hole is provided on the top of the first handle. A movable member is movably disposed within the receiving space. A first transmission member and a second transmission member are both movably connected to the movable member. The first transmission member and the second transmission member are respectively disposed at the first mounting port and the second mounting port. The movable member can drive the first transmission member and the second transmission member to move closer to or further away from each other. A first pressing member is connected to the first transmission member and located outside the first mounting port, and a second pressing member is connected to the second transmission member and located outside the second mounting port. An adjusting member passes through the operating hole and can drive the movable member to move. With the above-described configuration, the first stem can be implanted into the medullary cavity. After the first stem is inserted into the medullary cavity, the adjusting member is driven, which in turn causes the moving member to move. When the moving member moves, it causes the first and second transmission members to move away from each other, thereby causing the first pressing member connected to the first transmission member and the second pressing member connected to the second transmission member to move away from each other. When the first and second pressing members move away from each other, they can abut against the inner wall of the medullary cavity, thus making the position of the first stem more stable. Therefore, the technical solution of this application effectively solves the problem of insufficient stability after hip joint prosthesis implantation in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a hip joint prosthesis according to the present invention is shown;

[0018] Figure 2 It shows Figure 1A front view schematic diagram of a hip joint prosthesis;

[0019] Figure 3 It shows Figure 1 A side view of a hip joint prosthesis;

[0020] Figure 4 It shows Figure 2 A cross-sectional view of a hip joint prosthesis;

[0021] Figure 5 It shows Figure 3 A cross-sectional view of a hip joint prosthesis;

[0022] Figure 6 It shows Figure 1 A schematic diagram of the exploded structure of a hip joint prosthesis;

[0023] Figure 7 It shows Figure 1 A three-dimensional structural diagram of the first stem of a hip joint prosthesis;

[0024] Figure 8 It shows Figure 1 A three-dimensional structural diagram of the first stem of a hip joint prosthesis;

[0025] Figure 9 It shows Figure 8 A cross-sectional schematic diagram of the first handle body;

[0026] Figure 10 It shows Figure 1 A three-dimensional structural diagram of the internal structure of the first stem of a hip joint prosthesis;

[0027] Figure 11 It shows Figure 10 A schematic diagram of the decomposed structure;

[0028] Figure 12 It shows Figure 10 A cross-sectional view of the limiting component;

[0029] Figure 13 It shows Figure 1 A three-dimensional structural diagram of the second stem of a hip joint prosthesis.

[0030] The above figures include the following reference numerals:

[0031] 10. Ball head;

[0032] 20. First handle body; 21. Accommodating space; 22. First mounting port; 23. Second mounting port; 24. Operating hole; 25. First guide groove; 26. Second guide groove; 27. First connecting hole; 28. Third connecting hole;

[0033] 30. Moving part; 31. First drive shaft; 32. Second drive shaft; 33. First guide post; 34. Second guide post;

[0034] 41. First transmission component; 411. First transmission groove; 412. First connecting plate; 413. First universal joint connector; 42. Second transmission component; 421. Second transmission groove; 422. Second connecting plate; 423. Second universal joint connector;

[0035] 51. First pressing component; 52. Second pressing component;

[0036] 60. Adjusting components;

[0037] 70. Second handle body; 71. Limiting and fitting part;

[0038] 80. Limiting element; 81. Toothed part; 82. Second connecting hole;

[0039] 91. Elastic component; 92. Anti-detachment component; 93. Spike component. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] like Figures 1 to 7 As shown, in this embodiment, the hip joint prosthesis includes: a ball head 10, a first stem 20, a movable member 30, a first transmission member 41, a second transmission member 42, a first pressing member 51, a second pressing member 52, and an adjusting member 60. The first end of the first stem 20 is connected to the ball head 10. The first stem 20 has an internal receiving space 21. A first mounting port 22 and a second mounting port 23 are provided on the sidewall of the first stem 20. The first mounting port 22 and the second mounting port 23 are located on opposite sides of the receiving space 21 and are both connected to the receiving space 21. An operating hole 24 is provided at the top of the first stem 20, and the operating hole 24 is connected to the receiving space 21. The movable member 30 is movably disposed within the receiving space 21. The first transmission member 41 and the second transmission member 42 are both movably connected to the movable member 30. The first transmission member 41 is disposed at the first mounting port 22, and the second transmission member 42 is disposed at the second mounting port 23. Movement of the movable member 30 can cause the first transmission member 41 and the second transmission member 42 to move closer to or further away from each other. The first pressing member 51 is connected to the first transmission member 41 and located outside the first mounting port 22. The second pressing member 52 is connected to the second transmission member 42 and located outside the second mounting port 23. The adjusting member 60 passes through the operating hole 24 and drives the moving member 30 to move.

[0044] Applying the technical solution of this embodiment, the first end of the first handle 20 is connected to the ball head 10. A receiving space 21 is provided inside the first handle 20. A first mounting port 22 and a second mounting port 23 are provided on the side wall of the first handle 20. An operating hole 24 is provided on the top of the first handle 20. The movable member 30 is movably disposed within the receiving space 21. The first transmission member 41 and the second transmission member 42 are both movably connected to the movable member 30. The first transmission member 41 and the second transmission member 42 are respectively disposed at the first mounting port 22 and the second mounting port 23. The movable member 30 can drive the first transmission member 41 and the second transmission member 42 to move closer to or further away from each other. The first pressing member 51 is connected to the first transmission member 41 and located outside the first mounting port 22. The second pressing member 52 is connected to the second transmission member 42 and located outside the second mounting port 23. The adjusting member 60 passes through the operating hole 24 and can drive the movable member 30 to move. With the above-described configuration, the first stem 20 can be implanted into the medullary cavity. After the first stem 20 is inserted into the medullary cavity, the adjusting member 60 is driven, which in turn causes the adjusting member 60 to move the moving member 30. When the moving member 30 moves, it causes the first transmission member 41 and the second transmission member 42 to move away from each other, thereby causing the first pressing member 51 connected to the first transmission member 41 and the second pressing member 52 connected to the second transmission member 42 to move away from each other. When the first pressing member 51 and the second pressing member 52 move away from each other, they can abut against the inner wall of the medullary cavity, thereby making the position of the first stem 20 more stable. Therefore, the technical solution of this embodiment effectively solves the problem of insufficient stability after hip joint prosthesis implantation in related technologies.

[0045] Specifically, the technical solution of this embodiment achieves adaptive pressing of the first pressing member 51 and the second pressing member 52 against the inner wall of the medullary cavity by moving the moving member 30 within the accommodating space 21, thereby driving the first transmission member 41 and the second transmission member 42 to move closer or further apart.

[0046] This allows the pressure distribution to be automatically adjusted according to the actual condition of the patient's medullary cavity during the compression fitting process, effectively promoting bone ingrowth and solving the problem of poor matching between the proximal femoral stem and the proximal femur due to individual differences, thus reducing the difficulty of surgical operation and the risk of failure.

[0047] It should be noted that the shape of the accommodating space 21 is adapted to the shape of the movable part 30.

[0048] In this embodiment, a first recess and a second recess are provided on the side wall of the first handle 20. The first recess is connected to the first mounting port 22, and the second recess is connected to the second mounting port 23. That is, the first mounting port 22 connects the receiving space 21 and the first recess, and the second mounting port 23 connects the receiving space 21 and the second recess.

[0049] The first pressing member 51 can be located in the first recess, and the second pressing member 52 can be located in the second recess. That is, initially, the first pressing member 51 is located in the first recess, and the second pressing member 52 is located in the second recess. This can prevent the first pressing member 51 and the second pressing member 52 from protruding outward from the first stem body 20, thereby making the implantation process of the hip joint prosthesis easier.

[0050] like Figures 1 to 9 As shown, in this embodiment, the first mounting port 22 and the second mounting port 23 are symmetrically arranged with respect to the moving member 30. The moving member 30 is provided with a first transmission shaft 31 and a second transmission shaft 32. The first transmission member 41 is provided with a first transmission groove 411. The first transmission groove 411 is inclined and has a first end near the first pressing member 51 and a second end near the second pressing member 52. The distance between the first end of the first transmission groove 411 and the end of the first handle 20 facing the ball head 10 is greater than the distance between the second end of the first transmission groove 411 and the end of the first handle 20 facing the ball head. The distance between the ends of part 10 is such that the first drive shaft 31 is inserted into the first drive groove 411; the second drive member 42 is provided with a second drive groove 421, the second drive groove 421 is inclined and has a first end near the first pressing member 51 and a second end near the second pressing member 52, the distance between the first end of the second drive groove 421 and the end of the first handle 20 facing the ball head 10 is less than the distance between the second end of the second drive groove 421 and the end of the first handle 20 facing the ball head 10, and the second drive shaft 32 is inserted into the second drive groove 421.

[0051] Through the cooperation of the first transmission shaft 31 with the first transmission groove 411 and the second transmission shaft 32 with the second transmission groove 421, during the movement of the moving member 30, the first transmission shaft 31 can push and pull the first transmission member 41 to move in a direction perpendicular to the movement of the moving member, and the second transmission shaft 32 can push and pull the second transmission member 42 to move in a direction perpendicular to the movement of the moving member 30, thereby realizing the mutual approach or distance between the first transmission member 41 and the second transmission member 42, and thus realizing the fixation of the first handle 20.

[0052] like Figures 1 to 11 As shown, in this embodiment, the movable component 30 includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence. A first drive shaft 31 is disposed on the first sidewall, and a second drive shaft 32 is disposed on the third sidewall. The first transmission component 41 includes a first connecting plate 412 and a first universal connector 413. A first transmission groove 411 is disposed on the first connecting plate 412 and located on the outside of the first sidewall. The second transmission component 42 includes a second connecting plate 422 and a second universal connector 423. A second transmission groove 421 is disposed on the second connecting plate 422 and located on the outside of the third sidewall.

[0053] The first transmission groove 411 is disposed on the first connecting plate 412, which makes the machining of the first transmission groove 411 easier. Furthermore, the first universal connector 413 can cooperate with the first pressing member 51, allowing the first pressing member 51 to rotate in all directions. This ensures a larger contact area between the first pressing member 51 and the inner wall of the medullary cavity, and better positional stability of the first pressing member 51. Similarly, the second transmission groove 421 is disposed on the second connecting plate 422, which makes the machining of the second transmission groove 421 easier. Furthermore, the second universal connector 423 can cooperate with the second pressing member 52, allowing the second pressing member 52 to rotate in all directions. This ensures a better contact area between the second pressing member 52 and the inner wall of the medullary cavity, and better positional stability of the second pressing member 52.

[0054] like Figures 1 to 11 As shown, in this embodiment, the first connecting plate 412 can contact and engage with the bottom wall of the receiving space 21, that is, the bottom wall of the receiving space 21 guides the first connecting plate 412. Similarly, the second connecting plate 422 can contact and engage with the bottom wall of the receiving space 21, that is, the bottom wall of the receiving space 21 guides the second connecting plate 422.

[0055] It should be noted that, in this embodiment, the first transmission member 41 further includes a first connecting block, and the second transmission member 42 further includes a second connecting block. The first connecting block is connected between the first connecting plate 412 and the first universal connector 413, and the second connecting block is connected between the second connecting plate 422 and the second universal connector 423. The first connecting block is located on the outer side of the fourth sidewall, and the second connecting block is located on the outer side of the second sidewall. The arrangement of the first and second connecting blocks ensures that the first universal connector 413 is located at the centerline of the fourth sidewall, and the second universal connector 423 is located at the centerline of the second sidewall.

[0056] like Figures 1 to 8 As shown, in this embodiment, a first guide groove 25 and a second guide groove 26 are provided on the side wall of the first handle 20. The first drive shaft 31 is inserted into the first guide groove 25, and the second drive shaft 32 is inserted into the second guide groove 26.

[0057] The first drive shaft 31 and the first guide groove 25 can achieve a guiding fit, and the second drive shaft 32 and the second guide groove 26 can achieve a guiding fit, thereby making the moving direction of the moving part 30 more stable.

[0058] like Figures 1 to 11 As shown, in this embodiment, the movable member 30 is also provided with a first guide post 33 and a second guide post 34. The first guide post 33 is disposed on the first side wall, and the second guide post 34 is disposed on the third side wall. The first guide post 33 is inserted into the first guide groove 25, and the second guide post 34 is inserted into the second guide groove 26.

[0059] The arrangement of the first guide post 33 and the second guide post 34 further enhances the guiding function. Furthermore, since the first guide post 33 and the first drive shaft 31 are both located on the first side wall and spaced vertically, while the second guide post 34 and the second drive shaft 32 are both located on the third side wall and spaced vertically, this further guides the movement direction of the moving member 30, thereby improving the stability of the guidance.

[0060] like Figures 1 to 13 As shown, in this embodiment, the hip joint prosthesis also includes a second stem 70, which is hinged to the second end of the first stem 20. The first stem 20 is provided with a first communicating hole 27 on the side facing the second stem 70. The hip joint prosthesis also includes a limiting member 80, which is movably inserted into the first communicating hole 27. The second stem 70 is provided with a limiting engagement part 71 on the side facing the first stem 20. The limiting member 80 is connected to the moving member 30. When the moving member 30 moves, it can drive the limiting member 80 to engage with the limiting engagement part 71.

[0061] The second handle 70 is hinged to the first handle 20. By adjusting the angle between the second handle 70 and the first handle 20, the second handle 70 can accommodate different femoral shapes. Furthermore, when the moving member 30 moves downward, it can drive the limiting member 80 to move, thereby allowing the limiting member 80 to engage with the limiting mating part 71, locking the limiting member 80 and the limiting mating part 71, thus locking the angle between the first handle 20 and the second handle 70.

[0062] Specifically, the second end of the first handle 20 is provided with a hinge groove, and the second handle 70 is provided with a hinge block. The hinge block is inserted into the hinge groove, and the side of the hinge block facing the first handle 20 is arc-shaped. The limiting fitting part 71 is provided on the hinge block.

[0063] like Figures 1 to 13 As shown, in this embodiment, the limiting member 80 includes a limiting block, and an elastic member 91 is provided between the limiting block and the moving member 30. A toothed part 81 is provided on the side of the limiting block facing the limiting mating part 71. The limiting mating part 71 is an arc-shaped rack part, and the toothed part 81 can lock into the arc-shaped rack part.

[0064] The toothed part 81 and the arc-shaped rack part can be locked together, thereby locking the first handle 20 and the second handle 70. The elastic element 91 allows the limiting block to have a certain floating space, thereby preventing the limiting block from making hard contact with the limiting engagement part 71 when the moving part 30 moves continuously.

[0065] like Figures 1 to 13As shown, in this embodiment, the hip joint prosthesis also includes an anti-dislodgement component 92. A second connecting hole 82 is provided on the limiting block. The anti-dislodgement component 92 passes through the second connecting hole 82 and is fixedly connected to the moving component 30. The limiting block can be retracted relative to the moving component 30.

[0066] The anti-detachment component 92 ensures the positional stability of the limiting block. Under the action of the elastic component 91, initially, the limiting block and the moving component 30 maintain the maximum distance. When the moving component 30 moves towards the second handle 70, the limiting block can engage with the limiting engagement part 71, thereby locking the first handle 20 and the second handle 70. At this time, the moving component 30 continues to move. Since the limiting block and the limiting engagement part 71 are already in the locked position, the limiting block cannot continue to move. Therefore, when the moving component 30 moves, it can compress the elastic component 91, thereby preventing the moving component 30 from continuously pushing against the limiting block.

[0067] Meanwhile, the anti-detachment component 92 can guide the movement direction of the limit block, thereby making the movement direction of the limit component 80 more stable.

[0068] like Figures 1 to 13 As shown, in this embodiment, the adjusting member 60 includes a screw, the operating hole 24 is a threaded hole, the screw is inserted into the threaded hole and rotatably connected to the moving member 30, and abuts against the moving member 30.

[0069] The above structure is relatively simple and easy to set up. When the screw rotates in the threaded hole, the screw can push or pull the movable part 30, thereby driving the movable part 30 to move.

[0070] Specifically, the top of the movable part 30 is provided with an assembly hole, and the end of the screw facing the movable part 30 is provided with an outward protrusion. The outward protrusion is located inside the assembly hole, and a stop is provided on the side of the assembly hole facing the screw. The stop and the outward protrusion stop and cooperate, thereby preventing the screw and the movable part 30 from separating.

[0071] like Figures 1 to 13 As shown, in this embodiment, a third connecting hole 28 is also provided on the side wall of the first handle 20. The third connecting hole 28 is connected to the operating hole 24. The hip joint prosthesis also includes a protruding member 93. The protruding member 93 is movably disposed in the third connecting hole 28. The screw has a conical surface. When the screw moves toward the moving member 30, the conical surface can push against the protruding member 93 so that the protruding member 93 extends out of the third connecting hole 28.

[0072] The above-mentioned settings can further fix the first handle 20, thereby making the position of the first handle 20 more stable.

[0073] Specifically, the hip joint prosthesis also includes a spring, which is disposed in the third connecting hole 28 and cooperates with the protrusion 93. Initially, the spring can keep the protrusion 93 in the third connecting hole 28. When the conical part pushes the protrusion 93, the spring is compressed, thereby allowing the protrusion 93 to extend out of the third connecting hole 28.

[0074] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0075] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0076] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hip joint prosthesis, characterized in that, include: Ball head (10); A first handle (20) is connected at its first end to the ball head (10). The first handle (20) has an internal accommodating space (21). A first mounting port (22) and a second mounting port (23) are provided on the side wall of the first handle (20). The first mounting port (22) and the second mounting port (23) are located on opposite sides of the accommodating space (21) and are both connected to the accommodating space (21). An operating hole (24) is provided at the top of the first handle (20). The operating hole (24) is connected to the accommodating space (21). The movable component (30) is movably disposed within the receiving space (21); The first transmission component (41) and the second transmission component (42) are both movably connected to the moving component (30). The first transmission component (41) is located at the first mounting port (22), and the second transmission component (42) is located at the second mounting port (23). The movement of the moving component (30) can drive the first transmission component (41) and the second transmission component (42) to move closer to each other or further away from each other. The first pressing member (51) and the second pressing member (52) are connected to the first transmission member (41) and located outside the first mounting port (22), and the second pressing member (52) is connected to the second transmission member (42) and located outside the second mounting port (23). An adjusting member (60) is provided at the operating hole (24), and the adjusting member (60) drives the moving member (30) to move; The first mounting port (22) and the second mounting port (23) are symmetrically arranged with respect to the moving member (30). The moving member (30) is provided with a first drive shaft (31) and a second drive shaft (32). The first drive member (41) is provided with a first drive groove (411). The first drive groove (411) is inclined and has a first end near the first pressing member (51) and a second end near the second pressing member (52). The distance between the first end of the first drive groove (411) and the end of the first handle (20) facing the ball head (10) is greater than the distance between the second end of the first drive groove (411) and the end of the first handle (20) facing the ball head (10). The distance between the ends of the first transmission shaft (31) is inserted into the first transmission groove (411); the second transmission member (42) is provided with a second transmission groove (421), the second transmission groove (421) is inclined and has a first end near the first pressing member (51) and a second end near the second pressing member (52), the distance between the first end of the second transmission groove (421) and the end of the first handle (20) facing the ball head (10) is less than the distance between the second end of the second transmission groove (421) and the end of the first handle (20) facing the ball head (10), the second transmission shaft (32) is inserted into the second transmission groove (421); The first handle (20) has a first recess and a second recess on its side wall. The first recess is connected to the first mounting port (22), and the second recess is connected to the second mounting port (23). The first pressing member (51) can be located in the first recess, and the second pressing member (52) can be located in the second recess.

2. The hip joint prosthesis according to claim 1, characterized in that, The movable component (30) includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence. The first drive shaft (31) is disposed on the first sidewall, and the second drive shaft (32) is disposed on the third sidewall. The first transmission component (41) includes a first connecting plate (412) and a first universal connector (413). The first transmission groove (411) is disposed on the first connecting plate (412) and located on the outside of the first sidewall. And / or, the second transmission component (42) includes a second connecting plate (422) and a second universal connector (423). The second transmission groove (421) is disposed on the second connecting plate (422) and located on the outside of the third sidewall.

3. The hip joint prosthesis according to claim 2, characterized in that, The first handle (20) has a first guide groove (25) and a second guide groove (26) on its side wall. The first drive shaft (31) is inserted into the first guide groove (25), and the second drive shaft (32) is inserted into the second guide groove (26).

4. The hip joint prosthesis according to claim 3, characterized in that, The movable part (30) is also provided with a first guide post (33) and a second guide post (34). The first guide post (33) is disposed on the first side wall, and the second guide post (34) is disposed on the third side wall. The first guide post (33) is inserted into the first guide groove (25), and the second guide post (34) is inserted into the second guide groove (26).

5. The hip joint prosthesis according to claim 1, characterized in that, The hip joint prosthesis also includes a second stem (70), which is hinged to the second end of the first stem (20). The first stem (20) has a first connecting hole (27) on the side facing the second stem (70). The hip joint prosthesis also includes a limiting member (80), which is movably inserted into the first connecting hole (27). The second stem (70) has a limiting engagement part (71) on the side facing the first stem (20). The limiting member (80) is connected to the moving member (30). When the moving member (30) moves, it can drive the limiting member (80) to engage with the limiting engagement part (71).

6. The hip joint prosthesis according to claim 5, characterized in that, The limiting member (80) includes a limiting block, and an elastic member (91) is provided between the limiting block and the moving member (30). The limiting block is provided with a tooth (81) on the side facing the limiting mating part (71). The limiting mating part (71) is an arc-shaped rack part, and the tooth (81) can lock into the arc-shaped rack part.

7. The hip joint prosthesis according to claim 6, characterized in that, The hip joint prosthesis also includes an anti-dislodgement component (92), and the limiting block is provided with a second connecting hole (82). The anti-dislodgement component (92) passes through the second connecting hole (82) and is fixedly connected to the moving component (30). The limiting block can be retracted relative to the moving component (30).

8. The hip joint prosthesis according to claim 1, characterized in that, The adjusting member (60) includes a screw, the operating hole (24) is a threaded hole, the screw is inserted into the threaded hole and rotatably connected to the moving member (30), and abuts against the moving member (30).

9. The hip joint prosthesis according to claim 8, characterized in that, The first handle (20) is also provided with a third connecting hole (28) on its side wall. The third connecting hole (28) is connected to the operating hole (24). The hip joint prosthesis also includes a protruding member (93). The protruding member (93) is movably disposed in the third connecting hole (28). The screw has a conical surface. When the screw moves toward the moving member (30), the conical surface can push against the protruding member (93) so that the protruding member (93) extends out of the third connecting hole (28).

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