Hip joint prosthesis

Abstract

The application provides a hip joint prosthesis, which comprises a femoral stem body, a driving member arranged on the femoral stem body, a transmission member movably arranged in the femoral stem body, the driving member driving the transmission member to move, a plug-in member telescopically arranged on the femoral stem body to have a plug-in position and a first storage position, the transmission member moving to drive the plug-in member, the plug-in member extending out of the femoral stem body when the plug-in member is in the plug-in position, the plug-in member retracting into the femoral stem body when the plug-in member is in the first storage position, and a force measuring member comprising a force gauge and a first elastic member connected to the force gauge, the force gauge being movably arranged in the femoral stem body, the force gauge driving the first elastic member to telescopically move on the femoral stem body so that the first elastic member has a force measuring position and a second storage position. The technical scheme of the application solves the problem that the hip joint prosthesis in the prior art cannot simultaneously ensure the stability after implantation and the convenience of later maintenance.

Description

Technical Field

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

[0002] Hip prostheses are indispensable medical devices in modern orthopedic surgery, widely used in total hip replacement surgery to relieve pain caused by joint diseases or injuries, restore patients' walking ability, and improve their quality of life. A hip prosthesis typically consists of a femoral stem, an acetabular cup, and a femoral head, with the femoral stem being crucial for fixing the prosthesis to the femoral medullary cavity within the body.

[0003] However, hip joint prostheses in related technologies face a series of challenges after implantation, including post-implantation stability and post-implantation maintenance. To improve short-term stability after implantation, bone cement is injected into the femoral medullary cavity, using the hardened strength of the bone cement to fix the femoral stem to the femur. However, over time, the interface between the bone cement and the femoral stem or bone tissue may loosen, leading to decreased stability of the femoral stem and thus causing it to loosen, affecting long-term stability. Furthermore, the removal of bone cement is complex and inconvenient for post-implantation maintenance.

[0004] In conclusion, the hip joint prostheses in the relevant technologies cannot simultaneously guarantee post-implantation stability and ease of maintenance. Summary of the Invention

[0005] The main objective of this invention is to provide a hip joint prosthesis to solve the problem that hip joint prostheses in related technologies cannot simultaneously ensure post-implantation stability and ease of maintenance.

[0006] To achieve the above objectives, according to one aspect of the present invention, a hip joint prosthesis is provided, comprising: a femoral stem body; a driving member disposed on the femoral stem body; a transmission member movably disposed within the femoral stem body, the driving member driving the transmission member to move; and a connector retractably disposed on the femoral stem body to have a connecting position and a first retracted position, the transmission member moving to drive the connector to switch between the connecting position and the first retracted position; when the connector is in the connecting position, the connector extends outside the femoral stem body; when the connector is in the first retracted position, the connector retracts into the femoral stem body; The force-bearing component includes a force gauge and a first elastic element connected to the force gauge. The force gauge is movably disposed within the femoral stem body. The force gauge drives the first elastic element to extend and retract on the femoral stem body, so that the first elastic element has a force-measuring position and a retracted position. When the first elastic element is in the force-measuring position, the first elastic element extends outside the femoral stem body. When the first elastic element is in the second retracted position, the first elastic element retracts into the femoral stem body. Specifically, when the connector is in the insertion position, the first elastic element is in the force-measuring position; when the connector is in the first retracted position, the first elastic element is in the second retracted position.

[0007] Furthermore, the transmission component drives the first elastic element to switch between a force-measuring position and a second retracted position. Alternatively, the hip joint prosthesis may also include a drive motor disposed within the femoral stem body, which drives the first elastic element to switch between a force-measuring position and a second retracted position.

[0008] Furthermore, the transmission component includes a transmission rod and an abutment block. The driving component is driven to engage with the first end of the transmission rod, and the abutment block is connected to the second end of the transmission rod. The abutment block is provided with an abutment slope that is angled to the axis of the transmission rod. The insertion component includes an insertion rod and a second elastic member. The second elastic member applies an inward force to the insertion rod. When the abutment block moves, the abutment slope abuts against the insertion rod, so that the insertion component switches from the first storage position to the insertion position.

[0009] Furthermore, the insertion rod includes a first rod segment and a second rod segment connected to the first rod segment. The diameter of the first rod segment is larger than the diameter of the second rod segment. A first stepped surface is formed between the first rod segment and the second rod segment, and an abutting inclined surface abuts against the first rod segment. A first mounting hole is provided on the femoral stem body. The insertion rod is movably inserted into the first mounting hole. The first mounting hole includes a first hole segment and a second hole segment connected to the outside of the first hole segment. The diameter of the first hole segment is larger than the diameter of the second hole segment. A second stepped surface is formed between the first hole segment and the second hole segment. The first rod segment is movably disposed within the first hole segment, and the second rod segment is inserted into the second hole segment. The second elastic element is a spring, which is sleeved outside the second rod segment. The first end of the spring abuts against the first stepped surface, and the second end of the spring abuts against the second stepped surface.

[0010] Furthermore, the insertion rod also includes a stop head disposed at the end of the second rod segment opposite to the first rod segment, the diameter of the stop head being larger than the diameter of the second hole segment; the first mounting hole also includes a third hole segment connected to the end of the second hole segment opposite to the first hole segment, the diameter of the third hole segment being larger than the diameter of the second hole segment, and a third stepped surface being formed between the third hole segment and the second hole segment; when the insertion member is in the first retracted position, the stop head is located inside the third hole segment, and the stop head is engaged with the third stepped surface.

[0011] Furthermore, the hip joint prosthesis also includes a turntable rotatably disposed within the femoral stem body. A transmission component is driven to the turntable via a transmission structure. The movement of the transmission component drives the turntable to rotate via the transmission structure. The rotation of the turntable causes the first elastic element to switch between a force-measuring position and a second storage position.

[0012] Furthermore, the transmission structure includes a drive plate, a first connecting rod, a guide rail, a rack, and a gear. The drive plate is connected to the transmission component. The drive plate is provided with a first guide hole. The first connecting rod is inserted into the first guide hole and guided by the first guide hole. The guide rail is fixedly installed inside the femoral stem body. The rack is movably installed on the guide rail and is fixedly connected to the first connecting rod. The rack meshes with the gear, and the gear is coaxially connected to the turntable. The transmission component moves to drive the drive plate to move. The first connecting rod is guided by the first guide hole so that the first connecting rod drives the rack to move on the guide rail. The movement of the rack drives the gear to rotate and drives the turntable to rotate.

[0013] Furthermore, the force measuring component also includes a connecting block and a second connecting rod connected to the connecting block. A second mounting hole is provided on the femoral stem body. The connecting block is movably disposed in the second mounting hole and guided and engaged with the second mounting hole. The force gauge is disposed at one end of the connecting block. A second guide hole is provided on the turntable. The second connecting rod is inserted into the second guide hole and guided and engaged with the second guide hole. The turntable rotates to drive the connecting block to move through the second connecting rod, thereby driving the first elastic element to switch between the force measuring position and the second storage position.

[0014] Furthermore, the hip joint prosthesis also includes a worm, a worm wheel, and a third connecting rod. The worm wheel meshes with the worm, and the third connecting rod is eccentrically mounted on the worm wheel. One end of the transmission component is provided with a third guide hole, and the third connecting rod is inserted into the third guide hole and guided and engaged with the third guide hole. The driving component drives the worm to rotate, so as to drive the third connecting rod to swing through the worm wheel, thereby driving the transmission component to move.

[0015] Furthermore, the third guide hole includes an arc-shaped hole segment and two straight hole segments respectively connected to both ends of the arc-shaped hole segment. The extension direction of the two straight hole segments is perpendicular to the movement direction of the transmission component, and the center line of the arc-shaped hole segment coincides with part of the movement trajectory of the axis of the third connecting rod.

[0016] According to the technical solution of this invention, a hip joint prosthesis includes: a femoral stem body, a driving member, a transmission member, a connector, and a force measuring member. The driving member is disposed on the femoral stem body. The transmission member is movably disposed within the femoral stem body, and the driving member drives the transmission member to move. The connector is retractably disposed on the femoral stem body to have a connector position and a first retracted position, and the transmission member moves to drive the connector to switch between the connector position and the first retracted position. When the connector is in the connector position, it extends outside the femoral stem body. When the connector is in the first retracted position, it retracts into the femoral stem body. The force measuring member includes a force gauge and a first elastic member connected to the force gauge. The force gauge is movably disposed within the femoral stem body, and the force gauge drives the first elastic member to extend and retract on the femoral stem body, so that the first elastic member has a force measuring position and a second retracted position. When the first elastic member is in the force measuring position, it extends outside the femoral stem body. When the first elastic element is in the second retracted position, it retracts into the femoral stem body. Specifically, when the connector is in the insertion position, the first elastic element is in the force-measuring position. When the connector is in the first retracted position, the first elastic element is in the second retracted position. Thus, the femoral stem body, serving as the foundation of the hip joint prosthesis, has a drive mechanism that efficiently and precisely controls the movement of the transmission mechanism and connector, ensuring the accuracy of the hip joint prosthesis's positioning and its stability within the body during implantation. The introduction of the transmission mechanism not only optimizes the transmission accuracy between the drive mechanism and the connector but also ensures smooth movement of the connector. The retractable design of the connector allows for flexible switching during implantation and removal, reducing the complexity of the implantation procedure and damage to bone tissue. After the femoral stem body is implanted into the femoral medullary cavity, the drive mechanism can be controlled to move the transmission mechanism, switching the connector to the insertion position and controlling the first elastic element of the force-measuring component to switch to the force-measuring position. After the connector is switched to the insertion position, it can be inserted into the femoral medullary cavity to improve the connection reliability between the femoral stem and the femur, thereby improving the stability of the hip prosthesis after implantation. After the first elastic element of the force measuring device is switched to the force measuring position, it can abut against the femoral medullary cavity. The force gauge can measure the change in elasticity of the first elastic element. When the change in elasticity exceeds a preset range, it indicates that the gap between the femoral stem and the femoral medullary cavity has increased, posing a risk of hip prosthesis loosening, thus facilitating timely intervention. When the hip prosthesis needs maintenance and removal, the drive mechanism can be controlled to move the transmission mechanism, switching the connector to the first storage position and controlling the first elastic element of the force measuring device to switch to the second storage position, thereby reducing damage to the femoral medullary cavity during removal and facilitating the removal operation. Thus, through the above settings, the stability of the hip prosthesis after implantation and the convenience of subsequent maintenance are improved. Therefore, the technical solution of this application effectively solves the problem that hip joint prostheses in related technologies cannot simultaneously ensure post-implantation stability and ease of maintenance. Attached Figure Description

[0017] 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:

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a hip joint prosthesis according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 A perspective view of a hip joint prosthesis;

[0020] Figure 3 It shows Figure 1 A perspective view of the transmission structure, connectors, and force measuring components of a hip joint prosthesis;

[0021] Figure 4 It shows Figure 1 A perspective view of the transmission structure, connectors, and force measuring components of the hip joint prosthesis from another angle.

[0022] Figure 5 It shows Figure 1 A cross-sectional schematic diagram of the transmission structure, connectors, and force measuring components of a hip joint prosthesis;

[0023] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the transmission components, worm gear, and worm wheel of a hip joint prosthesis.

[0024] The above figures include the following reference numerals:

[0025] 10. Femoral stem body; 11. First mounting hole; 111. First hole segment; 112. Second hole segment; 113. Third hole segment; 114. Second stepped surface; 115. Third stepped surface; 12. Second mounting hole;

[0026] 20. Transmission component; 21. Transmission rod; 211. Third guide hole; 2111. Arc-shaped hole section; 2112. Straight hole section; 22. Abutment block; 221. Abutment slope;

[0027] 30. Connector; 31. Insert rod; 311. First rod segment; 312. Second rod segment; 313. First stepped surface; 314. Stop head; 32. Second elastic element;

[0028] 40. Force measuring component; 41. Force gauge; 42. First elastic component; 43. Connecting block; 44. Second connecting rod;

[0029] 50. Turntable; 51. Second guide hole;

[0030] 60. Transmission structure; 61. Drive plate; 611. First guide hole; 62. First connecting rod; 63. Guide rail; 64. Rack; 65. Gear;

[0031] 71. Worm gear; 72. Worm wheel; 73. Third connecting rod. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In this embodiment, as Figures 1 to 5As shown, the hip joint prosthesis includes: a femoral stem body 10, a drive member, a transmission member 20, a connector 30, and a force measuring member 40. The drive member is disposed on the femoral stem body 10. The transmission member 20 is movably disposed within the femoral stem body 10, and the drive member drives the transmission member 20 to move. The connector 30 is retractably disposed on the femoral stem body 10 to have an insertion position and a first retracted position, and the transmission member 20 moves to drive the connector 30 to switch between the insertion position and the first retracted position. When the connector 30 is in the insertion position, the connector 30 extends outside the femoral stem body 10. When the connector 30 is in the first retracted position, the connector 30 retracts into the femoral stem body 10. The force-measuring component 40 includes a force gauge 41 and a first elastic element 42 connected to the force gauge 41. The force gauge 41 is movably disposed within the femoral stem body 10. The force gauge 41 drives the first elastic element 42 to extend and retract on the femoral stem body 10, so that the first elastic element 42 has a force-measuring position and a second retracted position. When the first elastic element 42 is in the force-measuring position, the first elastic element 42 extends outside the femoral stem body 10. When the first elastic element 42 is in the second retracted position, the first elastic element 42 retracts into the femoral stem body 10. Specifically, when the connector 30 is in the connector position, the first elastic element 42 is in the force-measuring position. When the connector 30 is in the first retracted position, the first elastic element 42 is in the second retracted position.

[0036] Thus, the femoral stem body 10 serves as the foundation of the hip joint prosthesis. The drive mechanism on it efficiently and precisely controls the movement of the transmission component 20 and the connector 30, ensuring the accuracy of the hip joint prosthesis's positioning and its stability within the body during implantation. The introduction of the transmission component 20 not only optimizes the transmission precision between the drive mechanism and the connector 30 but also ensures the smooth movement of the connector 30. The retractable design of the connector 30 allows for flexible switching during implantation and removal, reducing the complexity of the implantation procedure and minimizing damage to bone tissue. After the femoral stem body 10 is implanted into the femoral medullary cavity, the drive mechanism can be used to move the transmission component 20, switching the connector 30 to the insertion position and controlling the first elastic element 42 of the force measuring component 40 to switch to the force measuring position. Once the connector 30 is in the insertion position, it can be inserted into the femoral medullary cavity, improving the reliability of the connection between the femoral stem body 10 and the human femur, thereby enhancing the stability of the hip joint prosthesis after implantation. After the first elastic element 42 of the force measuring component 40 is switched to the force measuring position, the first elastic element 42 can abut against the femoral medullary cavity. The force gauge 41 can measure the change in elastic force of the first elastic element 42. When the change in elastic force of the first elastic element 42 exceeds the preset range, it indicates that the gap between the femoral stem body 10 and the femoral medullary cavity has increased, posing a risk of hip joint prosthesis loosening, thus facilitating timely intervention. When the hip joint prosthesis needs maintenance and removal, the drive component can be controlled to move the transmission component 20 to switch the insertion component 30 to the first storage position and control the first elastic element 42 of the force measuring component 40 to switch to the second storage position, thereby reducing damage to the femoral medullary cavity during removal and facilitating the removal operation of the hip joint prosthesis. In this way, the stability of the hip joint prosthesis after implantation and the convenience of subsequent maintenance are improved through the above settings. Therefore, the technical solution of this embodiment effectively solves the problem in related technologies that hip joint prostheses cannot simultaneously achieve stability after implantation and convenience of subsequent maintenance.

[0037] In this embodiment, the first elastic element 42 is a spring. In other embodiments, the first elastic element 42 is made of an elastic polymer material, such as rubber. The protruding length of the connector 30 is greater than the protruding length of the force measuring element 40 to facilitate the fixation of the hip joint prosthesis within the femoral medullary cavity.

[0038] like Figures 1 to 5 As shown, the transmission component 20 drives the first elastic element 42 to switch between a force-measuring position and a second storage position. In this way, the movement of the transmission component 20 can simultaneously drive the connector 30 and the first elastic element 42, making the structure of the hip joint prosthesis more compact.

[0039] In other embodiments, the hip joint prosthesis also includes a drive motor disposed within the femoral stem body 10, which drives the first elastic element 42 to switch between a force-measuring position and a second retracted position. Thus, by using a drive motor to drive the first elastic element 42, the switching between the force-measuring position and the second retracted position of the first elastic element 42 becomes more controllable, facilitating the adjustment of the extension distance of the first elastic element 42, thereby facilitating the measurement of the force change when the first elastic element 42 abuts against the femoral medullary cavity.

[0040] like Figures 2 to 5 As shown, the transmission component 20 includes a transmission rod 21 and an abutment block 22. The driving component is driven to engage with the first end of the transmission rod 21, and the abutment block 22 is connected to the second end of the transmission rod 21. The abutment block 22 is provided with an abutment inclined surface 221 that is angled to the axis of the transmission rod 21. The insertion component 30 includes an insertion rod 31 and a second elastic element 32. The second elastic element 32 applies an inward force to the insertion rod 31. When the abutment block 22 moves, the abutment inclined surface 221 abuts against the insertion rod 31, thereby switching the insertion component 30 from the first storage position to the insertion position. In this way, through the setting of the abutment inclined surface 221 and the insertion rod 31, the effect of the transmission rod 21 moving and driving the insertion rod 31 to extend and retract is achieved. The abutment between the abutment inclined surface 221 and the insertion rod 31 effectively utilizes the transmission reversal principle of the inclined surface, so that the movement of the transmission component 20 can be reversed to the extension and retraction of the insertion rod 31. The structure is simple, reliable, and easy to manufacture. The inward force applied by the second elastic element 32 to the insertion rod 31 ensures that the insertion member 30 can automatically retract to the first storage position when it is not driven by the abutment block 22, which facilitates the insertion operation and also provides convenience for the subsequent removal operation.

[0041] In this embodiment, the abutment block 22 is spherical, and the abutment inclined surface 221 is a spherical surface. Multiple connectors 30 are arranged circumferentially along the axis of the transmission rod 21; preferably, three connectors 30 are arranged at equal intervals along the axis of the transmission rod 21. Multiple force measuring components 40 are arranged circumferentially along the axis of the transmission rod 21; preferably, three force measuring components 40 are arranged at equal intervals along the axis of the transmission rod 21. A force gauge 41 is located on one side of the connector 30 along the moving direction of the transmission component 20, and the force gauge 41 is located on the side of the connector 30 away from the femoral head accessory.

[0042] It should be noted that "inner" refers to the outline relative to the main body 10 of the femoral stem itself, while "outer" refers to the outline relative to the main body 10 of the femoral stem itself.

[0043] In this embodiment, both the first elastic element 42 and the second elastic element 32 are preferably springs, and both the first elastic element 42 and the second elastic element 32 are preferably made of Co-Cr-Mo alloy material, which has high strength and is more resistant to body fluid corrosion.

[0044] like Figures 3 to 5 As shown, the insertion rod 31 includes a first rod segment 311 and a second rod segment 312 connected to the first rod segment 311. The diameter of the first rod segment 311 is larger than the diameter of the second rod segment 312. A first stepped surface 313 is formed between the first rod segment 311 and the second rod segment 312. An abutting inclined surface 221 abuts against the first rod segment 311. A first mounting hole 11 is provided on the femoral stem body 10. The insertion rod 31 is movably inserted into the first mounting hole 11. The first mounting hole 11 includes a first hole segment 111 and a second hole segment 112 communicating with the outside of the first hole segment 111. The diameter of the first hole segment 111 is larger than the diameter of the second hole segment 112. A second stepped surface 114 is formed between the first hole segment 111 and the second hole segment 112. The first rod segment 311 is movably disposed in the first hole segment 111, and the second rod segment 312 is inserted into the second hole segment 112. The second elastic element 32 is a spring, which is sleeved outside the second rod segment 312. The first end of the spring abuts against the first stepped surface 313, and the second end of the spring abuts against the second stepped surface 114. Through the segmented design of the insertion rod 31 and the first mounting hole 11, as well as the arrangement of the first stepped surface 313 and the second stepped surface 114, the spring is easily positioned between the insertion rod 31 and the femoral stem body 10, achieving stability and precise control of the insertion member 30 during extension and retraction. The segmented design of the insertion rod 31 and the first mounting hole 11 allows the first rod segment 311 to move within the first hole segment 111 and engage with it, and allows the second rod segment 312 to move within the second hole segment 112 and engage with it with the first hole segment 111. This ensures precise guidance and positioning of the insertion rod 31 when moving within the first mounting hole 11, reduces the shaking and wear of the insertion rod 31 during movement, and improves the service life of the hip joint prosthesis.

[0045] like Figures 3 to 5As shown, the insertion rod 31 also includes a stop head 314 disposed at the end of the second rod segment 312 opposite to the first rod segment 311. The diameter of the stop head 314 is larger than the diameter of the second hole segment 112. The first mounting hole 11 also includes a third hole segment 113 communicating with the end of the second hole segment 112 opposite to the first hole segment 111. The diameter of the third hole segment 113 is larger than the diameter of the second hole segment 112, and a third stepped surface 115 is formed between the third hole segment 113 and the second hole segment 112. When the insertion member 30 is in the first retracted position, the stop head 314 is located in the third hole segment 113, and the stop head 314 and the third stepped surface 115 stop and cooperate. The setting of the stop head 314 effectively restricts the axial displacement of the second rod segment 312 when it is not driven, so that the second rod segment 312 can be kept in the first mounting hole 11 before or when the hip joint prosthesis is implanted, preventing the second rod segment 312 from coming out of the first mounting hole 11. The cooperation between the third step surface 115 and the stop head 314 can not only precisely control the axial movement range of the connector 30, but also prevent the connector 30 from excessively shrinking when it is in the first storage position by the stop head 314 and the stop cooperation between the third step surface 115, thus preventing the second rod segment 312 from coming out of the first mounting hole 11.

[0046] In this embodiment, after the first rod segment 311 and the second rod segment 312 are installed, the stop head 314 and the second rod segment 312 are connected by welding or bonding.

[0047] like Figures 3 to 5 As shown, the hip joint prosthesis also includes a turntable 50 rotatably disposed within the femoral stem body 10. A transmission component 20 is drivenly connected to the turntable 50 via a transmission structure 60. Movement of the transmission component 20 drives the turntable 50 to rotate via the transmission structure 60. Rotation of the turntable 50 causes the first elastic element 42 to switch between a force-measuring position and a second retracted position. By introducing the rotatable turntable 50 and the transmission structure 60, the adjustability and response speed of the force-measuring element 40 are improved. The rotation of the turntable 50 can drive the extension and retraction of the first elastic element 42 via the transmission structure 60, making the transmission convenient and reliable.

[0048] like Figures 2 to 4As shown, the transmission structure 60 includes a drive plate 61, a first connecting rod 62, a guide rail 63, a rack 64, and a gear 65. The drive plate 61 is connected to the transmission component 20. The drive plate 61 is provided with a first guide hole 611. The first connecting rod 62 is inserted into the first guide hole 611 and is guided and engaged with the first guide hole 611. The guide rail 63 is fixedly installed in the femoral stem body 10. The rack 64 is movably installed on the guide rail 63 and is fixedly connected to the first connecting rod 62. The rack 64 meshes with the gear 65, and the gear 65 is coaxially connected to the turntable 50. The transmission component 20 moves to drive the drive plate 61 to move. The first connecting rod 62 is guided and engaged with the first guide hole 611 so that the first connecting rod 62 drives the rack 64 to move on the guide rail 63. The movement of the rack 64 drives the gear 65 to rotate and drive the turntable 50 to rotate. The transmission structure 60, through the linkage of the drive plate 61, the first connecting rod 62, the guide rail 63, the rack 64, and the gear 65, achieves efficient transmission between the transmission component 20 and the turntable 50. The drive plate 61, acting as a connecting bridge between the transmission component 20 and the transmission structure 60, ensures smooth and accurate transmission, reduces energy loss during movement, and improves driving precision. The guiding fit between the first connecting rod 62 and the first guide hole 611 on the drive plate 61, and the precise meshing of the rack 64 and the gear 65, form a stable transmission chain, enabling the minute displacement of the transmission component 20 to be converted into a large-angle rotation of the turntable 50, facilitating the extension and retraction of the first elastic element 42 driven by the turntable 50. The coaxial connection between the gear 65 and the turntable 50 ensures the continuity and coordination of the transmission.

[0049] In this embodiment, the first guide hole 611 is an elongated hole, and the extension direction of the first guide hole 611 can be decomposed into the moving direction of the transmission member 20 and the moving direction of the rack 64. The moving direction of the transmission member 20 is along the axial direction of the transmission rod 21, and the moving direction of the rack 64 is along the inward and outward directions of the femoral stem body 10.

[0050] like Figures 2 to 4As shown, the force measuring component 40 also includes a connecting block 43 and a second connecting rod 44 connected to the connecting block 43. A second mounting hole 12 is provided on the femoral stem body 10. The connecting block 43 is movably disposed within the second mounting hole 12 and guides the connection within the second mounting hole 12. The force gauge 41 is disposed at one end of the connecting block 43. A second guide hole 51 is provided on the turntable 50. The second connecting rod 44 is inserted into the second guide hole 51 and guides the connection within the second guide hole 51. The turntable 50 rotates to move the connecting block 43 via the second connecting rod 44, thereby driving the first elastic element 42 to switch between the force measuring position and the second storage position. Through the cooperation of the connecting block 43, the second connecting rod 44, and the second guide hole 51, the driving mechanism of the force measuring component 40 is optimized, making the driving of the connecting block 43 more stable and reliable. The guiding cooperation between the connecting block 43 and the second mounting hole 12 ensures the stability and reliability of the force gauge 41 during movement, avoiding measurement errors caused by unstable movement. The turntable 50 drives the connecting block 43 to move via the second connecting rod 44, which can precisely control the extension and retraction position of the first elastic element 42, thereby adjusting the measurement of the force gauge 41. This facilitates timely detection of hip joint prosthesis loosening, simplifies hip joint prosthesis maintenance, and provides more accurate monitoring data. This allows for timely detection and treatment of loosening issues, significantly improving the safety and long-term effectiveness of the hip joint prosthesis. Furthermore, through the guiding cooperation between the second guide hole 51 and the second connecting rod 44, the connecting block 43 can move along the inward and outward directions of the femoral stem body 10 when the turntable 50 rotates.

[0051] In this embodiment, the second guide hole 51 is an arc-shaped hole. The extension direction of the second guide hole 51 can be decomposed into the moving direction of the connecting block 43 and the rotating direction of the turntable 50. The moving direction of the connecting block 43 is along the inward and outward directions of the femoral stem body 10. The rotating direction of the turntable 50 is an annular direction centered on the axis of the gear 65. The second connecting rod 44 is connected to the connecting block 43 by welding or telescopic means; the connecting block 43 is first installed in the second mounting hole 12, and then the connecting block 43 and the second connecting rod 44 are welded, which is simple and reliable for assembly; the second connecting rod 44 is telescopically connected to the connecting block 43, so that the connecting block 43 and the second connecting rod 44 can be assembled first and then installed in the second mounting hole 12, which simplifies the assembly operation.

[0052] like Figure 6As shown, the hip joint prosthesis also includes a worm gear 71, a worm wheel 72, and a third connecting rod 73. The worm wheel 72 meshes with the worm gear 71, and the third connecting rod 73 is eccentrically mounted on the worm wheel 72. One end of the transmission component 20 is provided with a third guide hole 211, into which the third connecting rod 73 is inserted and guided. The drive component drives the worm gear 71 to rotate, thereby causing the third connecting rod 73 to swing through the worm wheel 72, thus driving the transmission component 20 to move. The linkage mechanism of the worm gear 71, worm wheel 72, and third connecting rod 73 in this technical feature enhances the control precision and response speed of the drive component, providing a more stable and flexible power drive. The meshing of the worm 71 and worm wheel 72, utilizing the helical structure of the worm 71, not only enables the transmission of high torque but also allows for precise control of the movement speed and amplitude of the transmission component 20 by changing the helix angle of the worm 71 and the gear ratio of the worm wheel 72. This facilitates adjustment of the relationship between the output speed of the drive component and the movement distance of the transmission component 20, improving the positioning accuracy of the hip joint prosthesis during implantation. The eccentric setting of the third connecting rod 73 and its guiding engagement with the third guide hole 211 of the transmission component 20 allow for the conversion of the movement direction of the transmission component 20. Furthermore, the above-mentioned configuration can precisely adjust the movement distance of the drive transmission component 20, thereby allowing for adjustment of the extension length of the connector 30 and the force gauge 41 as needed, reducing damage to the patient's own bone.

[0053] In this embodiment, the hip joint prosthesis also includes an isolation cover over the drive member, worm gear 71, worm wheel 72, and third connecting rod 73. The femoral stem body 10 is provided with a placement groove for placing the drive member, which is fixedly disposed within the placement groove.

[0054] like Figure 6As shown, the third guide hole 211 includes an arc-shaped hole segment 2111 and two straight hole segments 2112 respectively connected to both ends of the arc-shaped hole segment 2111. The extending direction of the two straight hole segments 2112 is perpendicular to the moving direction of the transmission member 20. The center line of the arc-shaped hole segment 2111 partially coincides with the motion trajectory of the axis of the third connecting rod 73. Thus, when the motion trajectory of the axis of the third connecting rod 73 coincides with the center line of the arc-shaped hole segment 2111, the rotation of the third connecting rod 73 will not drive the transmission member 20 to move. When the third connecting rod 73 moves into the straight hole segment 2112, the rotation of the third connecting rod 73 can drive the transmission member 20 to move at a lower speed. When the motion trajectory of the axis of the third connecting rod 73 is opposite to the center line of the arc-shaped hole segment 2111, the rotation of the third connecting rod 73 can drive the transmission member 20 to move at a higher speed. By specifically configuring the third guide hole 211, the moving speed of the transmission component 20 during implantation can be controlled, thereby controlling the extension speed of the connector 30 and the force measuring component 40. This ensures that the extension speed of the connector 30 and the force measuring component 40 better meets the implantation requirements and the structure of human bone, facilitating the smooth and reliable insertion of the connector 30 and the force measuring component 40 into the femoral medullary cavity. Furthermore, during one revolution of the third connecting rod 73, the transmission rod 21 can move downward and then upward along its axial direction and return to its initial position, enabling the transmission rod 21 to complete one linear reciprocating motion.

[0055] In this embodiment, the movement trajectory of the axis of the third connecting rod 73 is circular. Specifically, a portion of the movement trajectory of the axis of the third connecting rod 73 is circular, i.e., arc-shaped. A straight hole segment 2112 is provided at the endpoint of the arc, and the tangent at the endpoint of the arc is perpendicular to the extension direction of the corresponding straight hole segment 2112. The first rod segment 311, the second rod segment 312, and the stop head 314 of the connector 30 are preferably made of non-degradable materials such as titanium alloy and are anodized to improve the corrosion resistance of the prosthesis. The worm gear 71, the worm wheel 72, and the third connecting rod 73 are all preferably made of non-degradable materials such as titanium alloy. The transmission component 20 is manufactured using 3D printing technology, and the material is preferably titanium alloy. The femoral stem body 10 is manufactured using 3D printing technology, and the material is preferably titanium alloy and is anodized to improve the corrosion resistance of the prosthesis. The stop head 314 can use a trabecular bone structure to reduce the harm of stress concentration. By introducing elements with bioactivity and antibacterial functions such as Ca, P, Zn, Mn, Ag, and Sr into the hip joint prosthesis, the bone ingrowth performance and antibacterial ability of the prosthesis can be improved.

[0056] In this embodiment, the driving component is a DC motor, which is powered without contact by an external device. During contactless power supply, the DC motor's forward and reverse rotation can be controlled by changing the voltage polarity, facilitating the movement of the transmission component 20 in different directions. This allows the connector 30 to switch between the insertion position and the first retracted position, and also allows the force measuring component 40 to switch between the force measuring position and the second retracted position. When the DC motor is powered off, its motor shaft locks, ensuring the transmission component 20 remains in a preset position. The hip joint prosthesis also includes a microprocessor, which is connected to the driving component for control. The microprocessor enables wireless control, allowing signals to be sent externally to control the movement direction and distance of the transmission component 20, the switching of the connector 30 between the insertion position and the first retracted position, and the switching of the force measuring component 40 between the force measuring position and the second retracted position. The force gauge 41 is connected to the microprocessor to transmit the force change of the first elastic element 42 measured by the force gauge 41 to the microprocessor. The femoral stem body 10 is divided into multiple segments, which are fixedly connected by welding or other methods to facilitate the assembly of internal structures such as connectors, force measuring components, turntables, transmission structures, and transmission components. The force gauge 41 is powered by a battery, which is located within the hip joint prosthesis. The force gauge 41 is preferably a strain gauge type; the specific structure and principle of the strain gauge type force gauge can be found in the patent documents with authorization announcement numbers CN221826067 U and CN 216524498U.

[0057] In other embodiments, the drive unit is powered by a battery.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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: Femoral stem body (10); A driving component is disposed on the femoral stem body (10); The transmission component (20) is movably disposed within the femoral stem body (10), and the driving component drives the transmission component (20) to move; A connector (30) is telescopically disposed on the femoral stem body (10) to have a plug-in position and a first retracted position. The transmission member (20) moves to drive the connector (30) to switch between the plug-in position and the first retracted position. When the connector (30) is in the plug-in position, the connector (30) extends out of the femoral stem body (10). When the connector (30) is in the first retracted position, the connector (30) retracts into the femoral stem body (10). The force measuring component (40) includes a force gauge (41) and a first elastic element (42) connected to the force gauge (41). The force gauge (41) is movably disposed within the femoral stem body (10). The force gauge (41) drives the first elastic element (42) to extend and retract on the femoral stem body (10), so that the first elastic element (42) has a force measuring position and a second retracted position. When the first elastic element (42) is in the force measuring position, the first elastic element (42) extends out of the femoral stem body (10). When the first elastic element (42) is in the second retracted position, the first elastic element (42) retracts into the femoral stem body (10). When the connector (30) is in the plug position, the first elastic element (42) is in the force measuring position; when the connector (30) is in the first storage position, the first elastic element (42) is in the second storage position.

2. The hip joint prosthesis according to claim 1, characterized in that, The transmission component (20) drives the first elastic component (42) to switch between the force measuring position and the second storage position. Alternatively, the hip joint prosthesis may also include a drive motor disposed in the femoral stem body (10), which drives the first elastic component (42) to switch between the force measuring position and the second storage position.

3. The hip joint prosthesis according to claim 1, characterized in that, The transmission component (20) includes a transmission rod (21) and an abutment block (22). The driving component is driven to cooperate with the first end of the transmission rod (21). The abutment block (22) is connected to the second end of the transmission rod (21). The abutment block (22) is provided with an abutment inclined surface (221) that is angled to the axis of the transmission rod (21). The connector (30) includes a plug (31) and a second elastic member (32). The second elastic member (32) applies an inward force to the plug (31). When the abutting block (22) moves, the abutting inclined surface (221) abuts against the plug (31) so that the connector (30) switches from the first storage position to the plugging position.

4. The hip joint prosthesis according to claim 3, characterized in that, The insertion rod (31) includes a first rod segment (311) and a second rod segment (312) connected to the first rod segment (311). The diameter of the first rod segment (311) is larger than the diameter of the second rod segment (312). A first stepped surface (313) is formed between the first rod segment (311) and the second rod segment (312). The abutting inclined surface (221) abuts against the first rod segment (311). The femoral stem body (10) is provided with a first mounting hole (11), and the insertion rod (31) is movably inserted into the first mounting hole (11). The first mounting hole (11) includes a first hole segment (111) and a second hole segment (112) connected to the outside of the first hole segment (111). The diameter of the first hole segment (111) is larger than the diameter of the second hole segment (112). A second step surface (114) is formed between the first hole segment (111) and the second hole segment (112). The first rod segment (311) is movably disposed in the first hole segment (111), and the second rod segment (312) is inserted into the second hole segment (112). The second elastic element (32) is a spring, which is sleeved outside the second rod segment (312). The first end of the spring abuts against the first step surface (313), and the second end of the spring abuts against the second step surface (114).

5. The hip joint prosthesis according to claim 4, characterized in that, The insertion rod (31) further includes a stop head (314) disposed at one end of the second rod segment (312) away from the first rod segment (311), the diameter of the stop head (314) being larger than the diameter of the second hole segment (112); the first mounting hole (11) further includes a third hole segment (113) connected to one end of the second hole segment (112) away from the first hole segment (111), the diameter of the third hole segment (113) being larger than the diameter of the second hole segment (112), and a third stepped surface (115) is formed between the third hole segment (113) and the second hole segment (112); when the insertion member (30) is in the first storage position, the stop head (314) is located in the third hole segment (113), and the stop head (314) and the third stepped surface (115) stop and cooperate.

6. The hip joint prosthesis according to claim 1, characterized in that, The hip joint prosthesis also includes a turntable (50) rotatably disposed within the femoral stem body (10). The transmission member (20) is driven to the turntable (50) via a transmission structure (60). The transmission member (20) moves to drive the turntable (50) to rotate via the transmission structure (60). The turntable (50) rotates to drive the first elastic member (42) to switch between the force measuring position and the second storage position.

7. The hip joint prosthesis according to claim 6, characterized in that, The transmission structure (60) includes a drive plate (61), a first connecting rod (62), a guide rail (63), a rack (64), and a gear (65). The drive plate (61) is connected to the transmission component (20). The drive plate (61) is provided with a first guide hole (611). The first connecting rod (62) is inserted into the first guide hole (611) and guides and cooperates with the first guide hole (611). The guide rail (63) is fixedly disposed in the femoral stem body (10). The rack (64) is movably disposed on the guide rail (63). The rack (64) is fixedly connected to the first connecting rod (62), the rack (64) meshes with the gear (65), and the gear (65) is coaxially connected to the turntable (50). The transmission component (20) moves to drive the drive plate (61) to move. The first connecting rod (62) is guided and engaged with the first guide hole (611) so that the first connecting rod (62) drives the rack (64) to move on the guide rail (63). The rack (64) moves to drive the gear (65) to rotate and drive the turntable (50) to rotate.

8. The hip joint prosthesis according to claim 6, characterized in that, The force measuring component (40) further includes a connecting block (43) and a second connecting rod (44) connected to the connecting block (43). The femoral stem body (10) is provided with a second mounting hole (12). The connecting block (43) is movably disposed in the second mounting hole (12) and guided and engaged with the second mounting hole (12). The force gauge (41) is disposed at one end of the connecting block (43). The turntable (50) is provided with a second guide hole (51). The second connecting rod (44) is inserted into the second guide hole (51) and guided and engaged with the second guide hole (51). The turntable (50) rotates to drive the connecting block (43) to move through the second connecting rod (44), thereby driving the first elastic element (42) to switch between the force measuring position and the second storage position.

9. The hip joint prosthesis according to claim 1, characterized in that, The hip joint prosthesis also includes a worm (71), a worm wheel (72), and a third connecting rod (73). The worm wheel (72) meshes with the worm (71), and the third connecting rod (73) is eccentrically disposed on the worm wheel (72). One end of the transmission member (20) is provided with a third guide hole (211). The third connecting rod (73) is inserted into the third guide hole (211) and guided and engaged with the third guide hole (211). The driving member drives the worm (71) to rotate, so as to drive the third connecting rod (73) to swing through the worm wheel (72), so as to drive the transmission member (20) to move.

10. The hip joint prosthesis according to claim 9, characterized in that, The third guide hole (211) includes an arc-shaped hole segment (2111) and two straight hole segments (2112) respectively connected to both ends of the arc-shaped hole segment (2111). The extension direction of the two straight hole segments (2112) is perpendicular to the moving direction of the transmission member (20). The center line of the arc-shaped hole segment (2111) coincides with part of the motion trajectory of the axis of the third connecting rod (73).

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