Acetabular prosthesis

Abstract

The application provides a hip joint prosthesis, which comprises: a hip joint cup, a first mounting hole is arranged on the outer wall of the hip joint cup; a connecting structure is adjustably arranged in the first mounting hole, the connecting structure comprises a connecting stud, the connecting stud has an extended position extending out of the first mounting hole and a retracted position retracted into the first mounting hole, and the axis of the connecting stud is arranged to intersect the axis of the hip joint cup; and a driving structure is rotatably arranged on the hip joint cup, the driving structure drives the connecting stud to rotate and enables the connecting stud to switch between the extended position and the retracted position when the driving structure rotates. The technical scheme of the application effectively solves the problem of complicated implantation process of the hip joint prosthesis in the related art.

Description

Technical Field

[0001] This invention relates to the field of acetabular cup technology, and more specifically, to an acetabular prosthesis. Background Technology

[0002] During total hip replacement surgery, the acetabular prosthesis provides a mounting position for the femoral prosthesis, facilitating its installation. To ensure a more stable connection between the acetabular prosthesis and the bone structure, screws can be used to fix the acetabular prosthesis to the bone structure.

[0003] In related technologies, the acetabular cup has multiple connecting holes on its wall. A screw is aligned with one of these holes, and an Allen wrench is used to rotate the screw, causing it to screw into the bone structure. The head of the screw inside the acetabular cup abuts against the cup, thus fixing the cup to the bone structure. During the fixation process, it is necessary to maintain the stability of the relative position between the cup and the bone structure, ensure the screw is aligned with the connecting hole, and use an Allen wrench to rotate the screw, making the fixation process quite complicated. Summary of the Invention

[0004] The main objective of this invention is to provide an acetabular prosthesis to solve the problem of cumbersome acetabular prosthesis implantation process in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, an acetabular prosthesis is provided, comprising: an acetabular cup having a first mounting hole on its outer wall; a connecting structure adjustablely disposed within the first mounting hole, the connecting structure including a connecting stud having an extended position extending out of the first mounting hole and a retracted position retracted into the first mounting hole, the axis of the connecting stud intersecting the axis of the acetabular cup; and a driving structure rotatably disposed on the acetabular cup, wherein rotating the driving structure drives the connecting stud to rotate and enables the connecting stud to switch between the extended position and the retracted position.

[0006] Furthermore, the drive structure includes a mounting plate and multiple drive rods, which are spaced apart on the mounting plate along its circumferential direction. The mounting plate is rotatably mounted on the acetabular cup. The axes of the multiple drive rods are all angled with the axis of the mounting plate. The connection structure also includes a transmission component mounted on a connecting stud, and the drive rods can engage with the transmission component to drive the connecting stud to rotate.

[0007] Furthermore, the transmission component includes multiple transmission rods, which are spaced apart along the circumferential direction of the connecting stud at the end of the connecting stud facing the mounting plate. When the mounting plate rotates, some of the multiple drive rods sequentially engage with the multiple transmission rods to make the connecting stud rotate.

[0008] Furthermore, the acetabular cup includes a cup body and a sleeve disposed on the cup body. The sleeve passes through a first mounting hole, and the inner surface of the sleeve is provided with an internal thread that mates with the thread of the connecting stud.

[0009] Furthermore, the connecting structure includes multiple connecting structures, which are spaced apart in the circumferential direction of the acetabular cup. The first mounting hole includes multiple first mounting holes, which are configured one-to-one with the multiple connecting structures. The driving structure is driven to cooperate with the multiple connecting structures.

[0010] Furthermore, the acetabular prosthesis also includes a pusher, which is movably mounted on the acetabular cup; a sleeve is rotatably mounted in a first mounting hole, the axis of rotation of the sleeve being perpendicular to the axis of the acetabular cup; the connecting structure has a separated state (separated from the drive rod) and a contact state (engaged with the drive rod); the pusher can drive the connecting stud and the sleeve to rotate synchronously, so that the connecting structure switches between the contact state and the separated state; the distance between the axis of rotation of the sleeve and the end of the connecting structure facing the mounting plate is a first distance, and the distance between the axis of rotation of the sleeve and the end of the connecting structure away from the mounting plate is a second distance, the first distance being greater than the second distance; when one of the multiple connecting structures is in the contact state, the other connecting structures are in the separated state.

[0011] Furthermore, the acetabular cup is provided with a second clearance through hole, which is connected to the first mounting hole, and the pusher is inserted into the second clearance through hole.

[0012] Furthermore, the sleeve includes a cylindrical body and a rotating shaft disposed on the outer surface of the cylindrical body. A second mounting hole is provided inside the cup body, and the rotating shaft passes through the second mounting hole. The rotating shaft is rotatably disposed on the cup body, and the axis of rotation of the rotating shaft is perpendicular to the axis of the acetabular cup.

[0013] Furthermore, the drive structure also includes an operating lever. The first end of the operating lever is mounted on the mounting plate and is coaxially mounted with the mounting plate. The second end of the operating lever is the operating end. The acetabular cup is provided with a receiving space and a first clearance through hole communicating with the receiving space. The mounting plate and multiple drive levers are all located in the receiving space, and the operating lever passes through the first clearance through hole.

[0014] Furthermore, the receiving space is connected to the outer surface of the acetabular cup, the acetabular prosthesis also includes a cover body, which is disposed on the acetabular cup to close the receiving space, and / or, the acetabular cup is also provided with a third clearance through hole communicating with the receiving space, the acetabular prosthesis also includes an anti-rotation rod, which passes through the third clearance through hole and can abut against the mounting plate.

[0015] According to the technical solution of this invention, the acetabular prosthesis includes an acetabular cup, a connecting structure, and a driving structure. When the driving structure rotates on the acetabular cup, it drives the connecting stud to rotate, allowing the connecting stud to extend from the first mounting hole to the outside of the first mounting hole, thereby enabling the connecting stud to be inserted into the bone structure to fix the acetabular cup to the bone structure. The axis of the connecting stud intersects with the axis of the acetabular cup, that is, the connecting stud is inclined relative to the axis of the acetabular cup. This allows the first mounting hole to have a larger length, thus accommodating a longer connecting stud, and enabling the acetabular cup to be more stably fixed to the bone structure after the connecting stud is connected to the bone structure. Compared with related technologies that require aligning the screw with the connecting hole and using an Allen wrench to rotate the screw, this application achieves the fixation of the acetabular cup to the bone structure simply by driving the connecting structure to rotate through the driving structure. In other words, the technical solution of this application can more conveniently fix the acetabular cup to the bone structure. Therefore, the technical solution of this application effectively solves the problem of the cumbersome acetabular prosthesis implantation process 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 the acetabular prosthesis according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the acetabular prosthesis from another perspective;

[0019] Figure 3 It shows Figure 1 A cross-sectional schematic diagram of the acetabular prosthesis;

[0020] Figure 4 It shows Figure 1 A top view of the acetabular cup of the acetabular prosthesis;

[0021] Figure 5 It shows Figure 4 A cross-sectional view of the acetabular cup at point AA;

[0022] Figure 6 It shows Figure 4 A cross-sectional view of the BB portion of the acetabular cup;

[0023] Figure 7 It shows Figure 1 A three-dimensional structural diagram of the connection and drive structure of the acetabular prosthesis;

[0024] Figure 8 It shows Figure 1 A cross-sectional view of the acetabular prosthesis in a separated state.

[0025] The above figures include the following reference numerals:

[0026] 10. Acetate cup; 11. First mounting hole; 12. Cup body; 121. Second mounting hole; 13. Sleeve; 131. Cylinder body; 132. Rotating shaft; 14. Second clearance through hole; 15. Accommodation space; 16. First clearance through hole; 17. Third clearance through hole; 20. Connecting structure; 21. Connecting stud; 22. Transmission component; 221. Transmission rod; 30. Drive structure; 31. Mounting plate; 32. Drive rod; 33. Operating rod; 40. Pushing component; 41. Pushing stud; 50. Cover body; 60. Anti-rotation rod. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 7 As shown, the acetabular prosthesis of this embodiment includes an acetabular cup 10, a connecting structure 20, and a driving structure 30. A first mounting hole 11 is provided on the outer wall of the acetabular cup 10. The connecting structure 20 is adjustablely disposed within the first mounting hole 11. The connecting structure 20 includes a connecting stud 21, which has an extended position extending out of the first mounting hole 11 and a retracted position retracted into the first mounting hole 11. The axis of the connecting stud 21 intersects with the axis of the acetabular cup 10. The driving structure 30 is rotatably disposed on the acetabular cup 10. When the driving structure 30 rotates, it drives the connecting stud 21 to rotate, enabling the connecting stud 21 to switch between the extended and retracted positions.

[0031] Using the technical solution of this embodiment, the acetabular prosthesis includes an acetabular cup 10, a connecting structure 20, and a driving structure 30. When the driving structure 30 rotates on the acetabular cup 10, it can drive the connecting stud 21 to rotate, thereby allowing the connecting stud 21 to extend from inside the first mounting hole 11 to outside the first mounting hole 11, and thus allowing the connecting stud 21 to be inserted into the bone structure to fix the acetabular cup 10 to the bone structure. The axis of the connecting stud 21 is intersecting the axis of the acetabular cup 10, that is, the connecting stud 21 is inclined relative to the axis of the acetabular cup 10. This allows the first mounting hole 11 to have a larger length, thereby accommodating a longer connecting stud 21, so that after the connecting stud 21 is connected to the bone structure, the acetabular cup 10 can be more stably fixed to the bone structure. Compared to related technologies that require aligning the screw with the connecting hole and using an Allen wrench to rotate the screw, this application achieves fixation of the acetabular cup 10 to the bone structure simply by driving the connecting structure 20 to rotate the driving structure 30. In other words, the technical solution of this embodiment can more conveniently fix the acetabular cup 10 to the bone structure. Therefore, the technical solution of this embodiment effectively solves the problem of the cumbersome acetabular prosthesis implantation process in related technologies.

[0032] like Figure 3 and Figure 7As shown, in this embodiment, the drive structure 30 includes a mounting plate 31 and a plurality of drive rods 32. The plurality of drive rods 32 are spaced apart on the mounting plate 31 along the circumferential direction. The mounting plate 31 is rotatably mounted on the acetabular cup 10. The axes of the plurality of drive rods 32 are all set at an angle to the axis of the mounting plate 31. The connection structure 20 also includes a transmission member 22 disposed on the connecting stud 21. The drive rods 32 can drive the transmission member 22 to rotate the connecting stud 21. When the mounting plate 31 rotates on the acetabular cup 10, it can drive the plurality of drive rods 32 to rotate. In turn, the plurality of drive rods 32 can drive the connecting stud 21 to rotate through the transmission member 22. That is, by setting the mounting plate 31, drive rods 32 and transmission member 22, the connecting stud 21 can be screwed into the bone structure more easily, and the acetabular cup 10 can be more conveniently fixed to the bone structure.

[0033] like Figure 3 and Figure 7 As shown, in this embodiment, the transmission component 22 includes multiple transmission rods 221. These transmission rods 221 are spaced apart along the circumferential direction of the connecting stud 21 at the end of the connecting stud 21 facing the mounting plate 31. When the mounting plate 31 rotates, some of the multiple drive rods 32 sequentially engage with the multiple transmission rods 221 to rotate the connecting stud 21. The rotation of the drive rods 32 drives the transmission rods 221 to rotate, which in turn drives the connecting stud 21 to rotate, allowing the connecting stud 21 to extend out of the first mounting hole 11 and screw into the bone structure.

[0034] like Figure 3 and Figure 7 As shown, in this embodiment, the acetabular cup 10 includes a cup body 12 and a sleeve 13 disposed on the cup body 12. The sleeve 13 passes through the first mounting hole 11, and the inner surface of the sleeve 13 is provided with an internal thread that engages with the connecting stud 21. The sleeve 13 is provided to facilitate the connection between the connecting stud 21 and the acetabular cup 10.

[0035] like Figure 2 and Figure 7 As shown, in this embodiment, the connecting structures 20 include multiple structures, which are spaced apart in the circumferential direction of the acetabular cup 10. The first mounting holes 11 include multiple structures, each corresponding to one of the connecting structures 20. The driving structure 30 engages with each of the connecting structures 20. The multiple connecting structures 20 allow the acetabular cup 10 to be more stably fixed to the bone structure.

[0036] It should be noted that the multiple connecting structures 20 are evenly distributed, which makes the force distribution between the acetabular cup, the connecting structures and the bone structure more uniform.

[0037] like Figure 3 , Figure 6as well as Figure 8 As shown, in this embodiment, the acetabular prosthesis also includes a pusher 40, which is movably disposed on the acetabular cup 10. A sleeve 13 is rotatably disposed within the first mounting hole 11, with its rotation axis perpendicular to the axis of the acetabular cup 10. The connecting structure 20 has a separated state (separated from the drive rod 32) and a contact state (engaged with the drive rod 32). The pusher 40 can drive the connecting stud 21 and the sleeve 13 to rotate synchronously, allowing the connecting structure 20 to switch between the contact and separated states. The distance between the rotation axis of the sleeve 13 and the end of the connecting structure 20 facing the mounting plate 31 is a first distance, and the distance between the rotation axis of the sleeve 13 and the end of the connecting structure 20 away from the mounting plate 31 is a second distance, where the first distance is greater than the second distance. When one of the multiple connecting structures 20 is in the contact state, the remaining connecting structures 20 are in the separated state. The pusher 40 can abut against the connecting stud 21 or the sleeve 13, thereby driving the connecting stud 21 and the sleeve 13 to rotate synchronously, thus allowing the connecting structure 20 to separate from the drive rod 32, that is, the connecting structure 20 switches from a contact state to a separated state. The first distance is greater than the second distance, so that when the pusher 40 disengages from the connecting stud 21 or the sleeve 13, under the gravity of the sleeve 13 and the connecting stud 21, the connecting structure 20 can rotate to engage with the drive rod 32, that is, the connecting structure 20 switches from a separated state to a contact state.

[0038] Specifically, when the acetabular prosthesis is fixed to the bone structure, one of the multiple connecting structures 20 is switched to a contact state, while the remaining connecting structures 20 are switched to a disengaged state. Under the action of the driving structure 30, the connecting stud 21 of the connecting structure 20 in the contact state can rotate and screw into the bone structure, achieving initial fixation of the acetabular cup 10. Then, the remaining connecting structures 20 are switched to the contact state, and the driving structure 30 can simultaneously drive all the connecting studs 21 to rotate, causing the connecting studs 21 to screw into the bone structure. Furthermore, when one connecting structure 20 is in the contact state, the driving structure 30 can more easily drive the connecting stud 21 to rotate.

[0039] In this embodiment, the pusher 40 can contact the connecting stud 21, and thus the pusher 40 can drive the sleeve 13 to rotate through the connecting stud 21.

[0040] like Figure 3 , Figure 5 , Figure 6 as well as Figure 8As shown, in this embodiment, the acetabular cup 10 is provided with a second clearance through hole 14, which communicates with the first mounting hole 11. The pusher 40 passes through the second clearance through hole 14. By moving the pusher 40 within the second clearance through hole 14, the pusher 40 can contact the connecting stud 21 or the sleeve 13.

[0041] It should be noted that, in this embodiment, the pusher 40 includes a pusher stud 41, and the second clearance through hole 14 is a threaded mounting hole. The pusher stud 41 is rotatably disposed within the threaded mounting hole, and the pusher stud 41 can push and engage with the connecting stud 21 to switch the connecting structure 20 between a contact state and a separation state. The pusher stud 41 can rotate within the threaded mounting hole, thereby moving to contact the connecting structure 20, allowing the connecting structure 20 to switch from a contact state to a separation state.

[0042] In other embodiments, the acetabular cup 10 is provided with a first mounting groove, and the pusher 40 includes a pusher rod that guides and engages with the first mounting groove. A spring is provided between the pusher rod and the first mounting groove, and the spring applies a force to the pusher rod in a direction away from the connecting stud. When the pusher is pressed, it moves toward the connecting stud 21, thereby enabling the pusher 40 to contact the connecting stud 21, causing the connecting stud 21 to drive the sleeve 13 to rotate.

[0043] In other embodiments, the pusher 40 is movably disposed in the first mounting hole 11. The pusher is a pusher post, and the end of the pusher post is provided with a pusher slope. Through the pusher slope cooperating with the connecting stud 21, the connecting stud 21 can drive the sleeve 13 to rotate relative to the acetabular cup 10.

[0044] like Figure 7 As shown, in this embodiment, the sleeve 13 includes a cylindrical body 131 and a rotating shaft 132 disposed on the outer surface of the cylindrical body 131. A second mounting hole 121 is provided inside the cup body 12, and the rotating shaft 132 passes through the second mounting hole 121. The rotating shaft 132 is rotatably disposed on the cup body 12, and the axis of rotation of the rotating shaft 132 is perpendicular to the axis of the acetabular cup 10. By providing the rotating shaft 132, the cylindrical body 131 can rotate relative to the cup body 12.

[0045] It should be noted that the rotating shaft 132 and the cylinder 131 can be threaded together. The acetabular cup 10 is provided with a mounting through hole for mounting the rotating shaft 132, which passes through the mounting through hole. In other embodiments, the acetabular cup 10 is provided with a second mounting groove, which communicates with the first mounting hole. The rotating shaft 132 passes through the second mounting groove, which communicates with the outer surface of the acetabular cup, so that the rotating shaft can be installed from the outside of the acetabular cup into the acetabular cup.

[0046] like Figure 3 and Figure 7 As shown, in this embodiment, the drive structure 30 further includes an operating rod 33. The first end of the operating rod 33 is disposed on the mounting plate 31, and the operating rod 33 is coaxially arranged with the mounting plate 31. The second end of the operating rod 33 is the operating end. The acetabular cup 10 has a receiving space 15 and a first clearance through hole 16 communicating with the receiving space 15. The mounting plate 31 and multiple drive rods 32 are all disposed within the receiving space 15, and the operating rod 33 passes through the first clearance through hole 16. Rotating the operating rod 33 can drive the mounting plate 31 to rotate, which in turn drives the transmission component 22 to rotate via the multiple drive rods 32, which in turn drives the connecting stud 21 to rotate. With the receiving space 15 provided, the mounting plate 31, drive rods 32, and operating rod 33 can be installed onto the acetabular cup.

[0047] The end of the operating lever 33 away from the mounting plate 31 is provided with an operating groove (such as a cross groove, an internal hexagonal hole, etc.) or an external hexagonal block, which is used to cooperate with surgical tools (such as a special wrench) to realize manual or instrument-driven rotation of the operating lever 33, that is, to facilitate the rotation of the operating lever 33.

[0048] like Figure 3 , Figure 5 as well as Figure 6 As shown, in this embodiment, the receiving space 15 is in communication with the outer surface of the acetabular cup 10. The acetabular prosthesis also includes a cover 50, which is disposed on the acetabular cup 10 to close the receiving space 15. The cover 50 facilitates the installation of the mounting plate 31, the drive rod 32, and the operating rod 33 onto the acetabular cup 10.

[0049] The cover 50 and the acetabular cup 10 are threaded together.

[0050] The acetabular cup 10 is also provided with a third clearance through hole 17 communicating with the receiving space 15. The acetabular prosthesis also includes an anti-rotation rod 60, which passes through the third clearance through hole 17 and can abut against the mounting plate 31. The anti-rotation rod 60 can apply friction to the mounting plate 31 to prevent the mounting plate 31 from rotating.

[0051] It should be noted that the anti-rotation rod 60 is threaded into the third clearance through hole 17.

[0052] In this embodiment, during the implantation of the acetabular prosthesis, one connecting structure 20 is switched to the contact state, while the remaining connecting structures 20 are switched to the separation state. Then, the mounting plate 31 is rotated, and the mounting plate 31 drives the transmission rod 221 to rotate via the drive rod 32. In turn, the transmission rod 221 drives the connecting stud 21 to rotate, allowing the connecting stud 21 to be screwed into the bone structure. After the connecting stud 21 has been screwed into the bone structure a preset distance, the remaining connecting structures 20 are switched to the contact state. At this time, the drive structure 30 can drive all connecting structures 20 to rotate, and all connecting studs 21 can be screwed into the bone structure. That is, the connecting structure 20 is switched from the retracted position to the extended position, thereby fixing the acetabular cup 10.

[0053] This embodiment provides an acetabular cup prosthesis with a built-in drive screw mechanism. That is, the acetabular prosthesis includes a drive structure 30 and connecting studs 21. By integrating the linkage structure of the drive rod 32 and the transmission rod 221 inside the prosthesis, multiple connecting studs 21 can be driven synchronously or sequentially into the surrounding bone tissue simply by rotating the mounting plate 31, thereby simplifying the surgical operation and improving the fixation stability.

[0054] The acetabular cup 10 is made of titanium alloy or cobalt-chromium-molybdenum alloy, and its outer surface can be coated with hydroxyapatite or 3D printed with a porous structure to promote bone ingrowth. The acetabular cup 10 has multiple first mounting holes 11, which are symmetrically distributed around the circumference.

[0055] A connecting stud 21 is installed in each first mounting hole 11. The connecting stud 21 is made of medical-grade stainless steel or titanium alloy and has external threads machined at its end. A sleeve 13 (i.e., a threaded engagement component) is embedded in the inner wall of the acetabular cup 10 at the corresponding position. The internal thread of the sleeve 13 matches the connecting stud 21.

[0056] The drive structure 30 is located at the center of the bottom of the acetabular cup 10 and is made of highly wear-resistant medical polymer or metal. Its edge is provided with several protruding drive rods 32, which form a "post-to-post" actuating engagement with the transmission rod 221 at the tail end of the connecting stud 21. The transmission rod 221 can be an integral part of the connecting stud 21 or connected by a pin.

[0057] During the surgery, after the acetabular cup is implanted, rotating the operating rod 33 will drive multiple connecting studs 21 to rotate out synchronously and penetrate the bone structure.

[0058] The acetabular prosthesis of this embodiment has the following advantages:

[0059] 1. Easy to operate: Only one central component needs to be rotated (i.e., the rotating mounting plate 31 drives the drive rod 32 to rotate) to drive multiple connecting studs 21, which greatly shortens the operation time;

[0060] 2. Space-friendly: No external tools are needed to penetrate narrow surgical fields, reducing soft tissue damage;

[0061] 3. Reliable fixing: The connecting studs 21 are screwed in synchronously or in a controllable sequence to ensure uniform force distribution and improve initial stability;

[0062] 4. High structural integration: The drive structure 30 is built into the acetabular cup 10, which does not affect the external contour of the acetabular prosthesis and its integration with the bone;

[0063] 5. Suitable for osteoporosis patients: Provides additional mechanical anchoring to compensate for insufficient bone mass.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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 prosthesis, characterized in that, include: An acetabular cup (10) has a first mounting hole (11) on its outer wall. A connecting structure (20) is positionably disposed within the first mounting hole (11). The connecting structure (20) includes a connecting stud (21), which has an extended position extending out of the first mounting hole (11) and a retracted position retracted into the first mounting hole (11). The axis of the connecting stud (21) intersects with the axis of the acetabular cup (10). A drive structure (30) is rotatably mounted on the acetabular cup (10). When the drive structure (30) rotates, it drives the connecting stud (21) to rotate and enables the connecting stud (21) to switch between the extended position and the retracted position. The drive structure (30) includes a mounting plate (31) and a plurality of drive rods (32). The plurality of drive rods (32) are spaced apart on the mounting plate (31) along the circumferential direction. The mounting plate (31) is rotatably mounted on the acetabular cup (10). The axes of the plurality of drive rods (32) are all set at an angle to the axis of the mounting plate (31). The connection structure (20) also includes a transmission member (22) mounted on the connecting stud (21). The drive rods (32) can drive and cooperate with the transmission member (22) to make the connecting stud (21) rotate. The transmission component (22) includes a plurality of transmission rods (221), which are spaced apart along the circumferential direction of the connecting stud (21) at the end of the connecting stud (21) facing the mounting plate (31). When the mounting plate (31) rotates, some of the driving rods (32) sequentially push and engage with the plurality of transmission rods (221) to make the connecting stud (21) rotate.

2. The acetabular prosthesis according to claim 1, characterized in that, The acetabular cup (10) includes a cup body (12) and a sleeve (13) disposed on the cup body (12). The sleeve (13) passes through the first mounting hole (11), and the inner surface of the sleeve (13) is provided with an internal thread that is threaded to the connecting stud (21).

3. The acetabular prosthesis according to claim 2, characterized in that, The connecting structure (20) includes multiple structures, which are spaced apart in the circumferential direction of the acetabular cup (10). The first mounting hole (11) includes multiple structures, which are corresponding to the multiple connecting structures (20) one by one. The driving structure (30) is driven to cooperate with the multiple connecting structures (20).

4. The acetabular prosthesis according to claim 3, characterized in that, The acetabular prosthesis also includes a pusher (40), which is movably disposed on the acetabular cup (10); The sleeve (13) is rotatably disposed in the first mounting hole (11), and the rotation axis of the sleeve (13) is perpendicular to the axis of the acetabular cup (10). The connecting structure (20) has a separated state that is separated from the drive rod (32) and a contact state that is engaged with the drive rod (32). The pusher (40) can drive the connecting stud (21) and the sleeve (13) to rotate synchronously so that the connecting structure (20) switches between the contact state and the separated state. The distance between the rotation axis of the sleeve (13) and the end of the connecting structure (20) facing the mounting plate (31) is the first distance, and the distance between the rotation axis of the sleeve (13) and the end of the connecting structure (20) away from the mounting plate (31) is the second distance. The first distance is greater than the second distance. When one of the multiple connection structures (20) is in the contact state, the other connection structures (20) are in the separation state.

5. The acetabular prosthesis according to claim 4, characterized in that, The acetabular cup (10) is provided with a second clearance through hole (14), which is connected to the first mounting hole (11), and the pusher (40) is inserted into the second clearance through hole (14).

6. The acetabular prosthesis according to claim 2, characterized in that, The sleeve (13) includes a cylindrical body (131) and a rotating shaft (132) disposed on the outer surface of the cylindrical body (131). A second mounting hole (121) is provided inside the cup body (12). The rotating shaft (132) passes through the second mounting hole (121). The rotating shaft (132) is rotatably disposed on the cup body (12). The rotation axis of the rotating shaft (132) is perpendicular to the axis of the acetabular cup (10).

7. The acetabular prosthesis according to any one of claims 2 to 5, characterized in that, The drive structure (30) also includes an operating rod (33). The first end of the operating rod (33) is disposed on the mounting plate (31). The operating rod (33) is coaxially disposed with the mounting plate (31). The second end of the operating rod (33) is the operating end. The acetabular cup (10) is provided with a receiving space (15) and a first clearance through hole (16) communicating with the receiving space (15). The mounting plate (31) and the plurality of drive rods (32) are all disposed in the receiving space (15). The operating rod (33) passes through the first clearance through hole (16).

8. The acetabular prosthesis according to claim 7, characterized in that, The receiving space (15) is connected to the outer surface of the acetabular cup (10). The acetabular prosthesis also includes a cover (50), which is disposed on the acetabular cup (10) to close the receiving space (15). And / or, the acetabular cup (10) is also provided with a third clearance through hole (17) connected to the receiving space (15). The acetabular prosthesis also includes an anti-rotation rod (60), which passes through the third clearance through hole (17) and can abut against the mounting plate (31).

Images