Acetabular prosthesis

Abstract

The application provides a hip joint prosthesis, which comprises: a hip joint cup, a containing part being arranged in the hip joint cup and being in communication with the outer surface of the hip joint cup; an external fixing part, which is movably arranged in the containing part and has a fixed position extending out of the hip joint cup and a avoiding position in the containing part, and the moving direction of the external fixing part and the axis of the hip joint cup form an acute angle or a right angle; and an operating part, which is arranged on the hip joint cup and is in driving cooperation with the external fixing part to switch the external fixing part between the fixed position and the avoiding position. The technical scheme of the application effectively solves the problem of poor fixing effect of the hip joint cup in the related art.

Description

Technical Field

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

[0002] In total hip arthroplasty, the acetabular cup is an important component of the total hip joint prosthesis. The long-term stability and biological fixation effect of the acetabular cup after implantation are directly related to the success rate of the surgery and the service life of the acetabular cup.

[0003] In existing technologies, if a patient has osteoporosis, acetabular bone defects, or poor bone bed quality, the use of a press-fit fixation method to implant the acetabular cup may result in insufficient initial stability, which can easily lead to loosening, displacement, or even dislocation of the acetabular cup, causing pain and prosthesis failure, requiring revision surgery. Summary of the Invention

[0004] The main objective of this invention is to provide an acetabular prosthesis to solve the problem of poor acetabular cup fixation 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 receiving portion therein communicating with the outer surface of the acetabular cup; an extension fixation member movably disposed within the receiving portion, having a fixed position extending out of the acetabular cup and a clearance position located within the receiving portion, the movement direction of the extension fixation member having an acute angle or a right angle with the axis of the acetabular cup; and an operating member disposed on the acetabular cup and drivingly cooperating with the extension fixation member to switch the extension fixation member between the fixed position and the clearance position.

[0006] Furthermore, the extension fixation member includes an arc-shaped plate, the movement direction of the arc-shaped plate is toward the plane where the opening of the acetabular cup is located, and one end of the arc-shaped plate is a pointed tip, which is located outside the acetabular cup when the acetabular cup is in the fixed position.

[0007] Furthermore, there are multiple receiving parts and multiple extension fixing parts, and the multiple receiving parts and multiple extension fixing parts are arranged in a one-to-one correspondence. The multiple receiving parts are spaced apart around the axis of the acetabular cup, and the operating part and the multiple extension fixing parts are driven to cooperate.

[0008] Furthermore, the acetabular prosthesis also includes multiple transmission components, which are arranged one-to-one with multiple extension fixation components. The multiple transmission components are arranged around the outer periphery of the operating component and are all in transmission cooperation with the operating component.

[0009] Furthermore, the operating member has a first operating state and a second operating state. When the operating member is in the first operating state, the operating member drives and cooperates with one of the multiple transmission members so that the extended fixing member that is driven and cooperates with the transmission member can switch from a clearance position to a fixed position. When the operating member is in the second operating state, the operating member drives and cooperates with all of the multiple transmission members.

[0010] Furthermore, the transmission component is a transmission gear, and the extended fixing component is provided with multiple protruding teeth. The operating component includes an operating lever and multiple driving parts. The operating lever is rotatably mounted on the acetabular cup, and the multiple driving parts are spaced apart on the operating lever along the circumferential direction. The multiple driving parts are arranged in a one-to-one correspondence with the multiple transmission gears, and the driving parts mesh with the transmission gears.

[0011] Furthermore, the drive unit includes a drive rod, which is detachably mounted on the operating lever. When the operating component is in the first operating state, at least one of the drive rods is connected to the operating lever, while the remaining drive rods are detached from the operating lever.

[0012] Furthermore, the operating lever is provided with a plurality of first mounting threaded holes, the axes of which are all set at an angle to the axis of the operating lever. From the top of the acetabular cup to the mouth of the acetabular cup, the distance between the axis of the first mounting threaded hole and the axis of the operating lever gradually decreases. A first threaded segment is provided on the outer surface of the drive unit, and the first threaded segment is threadedly engaged with the first mounting threaded hole.

[0013] Furthermore, the acetabular prosthesis also includes a limiting cap, and the acetabular cup is provided with a second mounting threaded hole. The operating component includes an operating rod, which includes an operating plate and a rotating shaft disposed on the operating plate. The rotating shaft is rotatably disposed on the acetabular cup. The limiting cap is threadedly engaged with the second mounting threaded hole and abuts against the end of the operating plate away from the rotating shaft.

[0014] Furthermore, the acetabular prosthesis also includes a transmission component, an operating component that drives the transmission component, a transmission component that drives the extension fixing component, an installation space is provided inside the acetabular cup, the installation space is connected to the receiving part, the transmission component is rotatably disposed in the installation space, a second installation threaded hole is connected to the installation space, and the operating component is located in the installation space.

[0015] According to the technical solution of this invention, the acetabular prosthesis includes an acetabular cup, an extension fixation member, and an operating member. When the extension fixation member is in the clearance position, it can reduce the space occupied by the acetabular prosthesis, facilitate the transfer of the acetabular prosthesis, and facilitate the installation of the acetabular cup into the bone structure. The operating member can drive the extension fixation member to move, thereby allowing the first end of the extension fixation member to move from inside the receiving portion to outside the receiving portion. That is, the extension fixation member can switch from the clearance position to the fixed position, and the first end of the extension fixation member can extend into the bone structure, thereby fixing the acetabular cup to the bone structure. When the direction of movement of the extension fixation member forms an acute angle with the axis of the acetabular cup, the distance between the first end of the extension fixation member and the plane containing the opening of the acetabular cup after the extension fixation member is switched to the fixed position is less than the distance between the first end of the extension fixation member and the opening of the acetabular cup when the extension fixation member is located within the receiving portion. This allows the extension fixation member to integrate more effectively with the bone structure, thereby enabling the acetabular cup to be more stably fixed to the bone structure. In other words, compared to the press-fit fixation method used in related technologies, the extension fixation member in this application provides a more stable fixation of the acetabular cup. When the direction of movement of the extension fixation member forms a right angle with the axis of the acetabular cup, the operating component can more easily move the extension fixation member. Therefore, the technical solution of this application effectively solves the problem of poor acetabular cup fixation 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 cross-sectional schematic diagram of the acetabular prosthesis;

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

[0020] Figure 4 It shows Figure 1 A three-dimensional structural diagram of the operating components and extension fixation components of the acetabular prosthesis;

[0021] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the operating components of the acetabular prosthesis;

[0022] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the acetabular prosthesis from another perspective.

[0023] The above figures include the following reference numerals:

[0024] 10. Acetate cup; 11. Receiving part; 12. Second mounting threaded hole; 13. Installation space; 14. First cup body; 141. First convex ring; 15. Second cup body; 151. Second convex ring; 20. Outer extension fixing member; 21. Arc plate; 211. Tip; 22. Convex tooth; 30. Operating member; 31. Operating rod; 311. First mounting threaded hole; 312. Operating plate; 313. Rotating shaft; 32. Drive part; 321. Drive rod; 40. Transmission member; 41. Transmission gear; 50. Limiting cover. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figure 1 , Figure 3 as well as Figure 4 As shown, the acetabular prosthesis of this embodiment includes: an acetabular cup 10, an extension fixation member 20, and an operating member 30. The acetabular cup 10 has a receiving portion 11 communicating with its outer surface. The extension fixation member 20 is movably disposed within the receiving portion 11 and has a fixed position extending out of the acetabular cup 10 and a recessed position within the receiving portion 11. The direction of movement of the extension fixation member 20 forms an acute angle or a right angle with the axis of the acetabular cup 10. The operating member 30 is disposed on the acetabular cup 10 and drives the extension fixation member 20 to switch the extension fixation member 20 between the fixed position and the recessed position.

[0029] Using the technical solution of this embodiment, the acetabular prosthesis includes an acetabular cup 10, an extension fixation member 20, and an operating member 30. When the extension fixation member 20 is in the clearance position, it can reduce the space occupied by the acetabular prosthesis, facilitate the transfer of the acetabular prosthesis, and facilitate the installation of the acetabular cup 10 into the bone structure. The operating member 30 can drive the extension fixation member 20 to move, thereby allowing the first end of the extension fixation member 20 to move from inside the receiving portion 11 to outside the receiving portion 11. That is, the extension fixation member 20 can be switched from the clearance position to the fixed position, and the first end of the extension fixation member 20 can extend into the bone structure, thereby fixing the acetabular cup 10 to the bone structure. When the moving direction of the extension fixation member 20 forms an acute angle with the axis of the acetabular cup 10, the distance between the first end of the extension fixation member 20 and the plane containing the opening of the acetabular cup 10 after the extension fixation member 20 is switched to the fixed position is less than the distance between the first end of the extension fixation member 20 and the opening of the acetabular cup 10 when the extension fixation member 20 is located within the receiving portion 11. This allows the extension fixation member 20 to more effectively integrate with the bone structure, thereby enabling the acetabular cup 10 to be more stably fixed to the bone structure. In other words, compared to the press-fit fixation method used in related technologies to fix the acetabular cup 10, this embodiment uses the extension fixation member 20 to fix the acetabular cup 10 more stably. When the moving direction of the extension fixation member 20 forms a right angle with the axis of the acetabular cup 10, the operating member 30 can more easily move the extension fixation member 20. Therefore, the technical solution of this embodiment effectively solves the problem of poor acetabular cup fixation in related technologies.

[0030] It should be noted that the second end of the extended fastener 20 is always located inside the receiving part 11.

[0031] In this embodiment, the moving direction of the extension fixation member 20 has an acute angle with the axis of the acetabular cup 10. The angle between the moving direction of the extension fixation member 20 and the axis of the acetabular cup 10 refers to the angle between the tangent direction of the moving direction of the extension fixation member 20 and the axis of the acetabular cup 10. Specifically, the moving direction of the extension fixation member 20 is an arc.

[0032] like Figure 2 , Figure 4 as well as Figure 6 As shown, in this embodiment, the extension fixation member 20 includes an arc-shaped plate 21. The moving direction of the arc-shaped plate 21 is towards the plane where the opening of the acetabular cup 10 is located. One end of the arc-shaped plate 21 is a tip 211. When the acetabular cup 10 is in the fixed position, the tip 211 is located outside the acetabular cup 10. The moving direction of the arc-shaped plate 21 is towards the plane where the opening of the acetabular cup 10 is located. This ensures that after the arc-shaped plate 21 is inserted into the bone structure, the distance between the tip of the arc-shaped plate 21 and the opening of the acetabular cup 10 is less than the distance between the tip of the arc-shaped plate 21 and the opening of the acetabular cup 10 when the arc-shaped plate 21 is located inside the receiving part 11. This allows the arc-shaped plate 21 to more effectively fix the acetabular cup 10 to the bone structure. The extension fixation member 20 is set as an arc-shaped plate 21, so that the shape of the extension fixation member 20 can be adapted to the hemispherical shape of the acetabular cup 10. This allows the arc-shaped plate 21 to occupy only the space inside the cup wall of the acetabular cup 10, avoiding the second end of the extension fixation member 20 being located in the concave part of the acetabular cup 10 that accommodates the femoral head prosthesis. In other words, it avoids the reduction in the structural strength of the acetabular cup 10 caused by setting an opening on the cup wall of the acetabular cup 10 to avoid the second end of the extension fixation member 20.

[0033] It should be noted that the first end of the arc-shaped plate 21 is a pointed tip. When the extension fixation member 20 moves from inside the acetabular cup 10 to outside the acetabular cup 10, the distance between the tip of the extension fixation member 20 and the opening of the acetabular cup 10 gradually decreases.

[0034] The direction of movement of the arc plate 21 is the tangential direction of the arc plate 21.

[0035] The shape of the receiving part 11 is adapted to the shape of the arc plate 21.

[0036] In this embodiment, the arc shape in the arc plate 21 refers to the fact that the distance between the first end of the arc plate 21 and the plane where the opening of the acetabular cup 10 is located is less than the distance between the second end of the arc plate 21 and the plane where the opening of the acetabular cup 10 is located. Furthermore, the middle part of the arc plate 21 is not on the same plane as the first end and the second end of the arc plate 21. In the thickness direction of the arc plate 21, the symmetrical plane of the top surface and the bottom surface of the arc plate 21 is an arc surface.

[0037] In other embodiments, the direction of movement of the extension fixation member 20 has a right angle with the axis of the acetabular cup 10, that is, the plane in which the direction of movement of the extension fixation member 20 is located is perpendicular to the axis of the acetabular cup 10. In this case, the extension fixation member 20 can be a flat plate or an arc-shaped plate, but the arc in the arc-shaped plate means that the symmetrical plane of the two side walls in the width direction of the arc-shaped plate is an arc-shaped surface, and the first end and the second end of the extension fixation member 20 are located in the same plane.

[0038] like Figures 2 to 4 as well as Figure 6 As shown, in this embodiment, there are multiple receiving portions 11 and multiple extension fixation members 20, with each receiving portion 11 and extension fixation member 20 arranged in a one-to-one correspondence. The multiple receiving portions 11 are spaced apart around the axis of the acetabular cup 10, and the operating member 30 is driven to engage with each of the multiple extension fixation members 20. The arrangement of multiple extension fixation members 20 and multiple receiving portions 11 allows for a tighter connection between the acetabular cup 10 and the bone structure. The spaced-apart arrangement of the multiple receiving portions 11 around the axis of the acetabular cup 10 results in more even force distribution between the acetabular cup 10 and the bone structure, leading to better long-term connection stability between the acetabular cup 10 and the bone structure.

[0039] It should be noted that multiple extension fixation members 20 are evenly spaced in the circumferential direction of the acetabular cup 10.

[0040] like Figure 2 and Figure 4 As shown, in this embodiment, the acetabular prosthesis also includes multiple transmission components 40, each corresponding to a multiple extension fixation components 20. The transmission components 40 are arranged around the outer periphery of the operating component 30 and are all in transmission engagement with the operating component 30. The multiple transmission components 40 facilitate the movement of the multiple extension fixation components 20 by the operating component 30. Through the operating component 30 and the transmission components 40, controllable, synchronous, and directional movement of the extension fixation components 20 can be achieved, avoiding accidental damage to the bone structure during acetabular prosthesis implantation.

[0041] like Figure 4 and Figure 5 As shown, in this embodiment, the operating member 30 has a first operating state and a second operating state. When the operating member 30 is in the first operating state, it drives and engages with one of the multiple transmission members 40, so that the extended fixing member 20 that drives and engages with that transmission member 40 can switch from a clearance position to a fixed position. When the operating member 30 is in the second operating state, it drives and engages with all of the multiple transmission members 40. By switching the operating member 30 between the first and second operating states, the operating member 30 can drive different numbers of transmission members 40, and thus drive different numbers of extended fixing members 20. When the operating member 30 is in the first operating state, at least one of the multiple transmission members 40 can move, thereby driving the corresponding external fixation member 20 to move, that is, causing at least one external fixation member 20 to extend into the bone structure. This allows the external fixation member 20 extending into the bone structure to achieve initial fixation of the acetabular cup 10 when it is first implanted, making it easier for the multiple transmission members 40 to extend into the bone structure after the operating member 30 switches to the second operating state.

[0042] Specifically, when the acetabular cup 10 is implanted, if the operating member 30 is operated so that the operating member 30 simultaneously drives multiple transmission members 40, and then the multiple transmission members 40 respectively drive multiple extension fixation members 20 to move, since the extension fixation members 20 extend into the bone structure, a certain driving force is required. However, the driving force required to drive multiple extension fixation members 20 simultaneously is greater than the driving force required to drive one extension fixation member 20. Therefore, the operating member 30 is switched to the first operating state so that the operating member 30 drives only one extension fixation member 20 to move. This not only makes it easier for the extension fixation member 20 to extend into the bone structure, but also achieves the initial fixation of the relative position between the acetabular cup 10 and the bone structure.

[0043] When the operating member 30 is in the first operating state, the operating member 30 can be rotated back and forth, so that the tip of the extension fixation member 20 can more effectively destroy the bone structure, and thus the extension fixation member 20 can be more easily inserted into the bone structure.

[0044] Of course, the extension fixation member 20 can also be provided with a serrated part, so that when the operating member 30 rotates back and forth and drives the extension fixation member 20 to move back and forth, the serrated part can destroy the bone structure, making it easier for the extension fixation member 20 to be inserted into the bone structure.

[0045] like Figure 2 and Figure 4 As shown, in this embodiment, the transmission component 40 is a transmission gear 41, the extended fixing member 20 is provided with multiple protruding teeth 22, and the operating component 30 includes an operating lever 31 and multiple driving parts 32. The operating lever 31 is rotatably mounted on the acetabular cup 10, and the multiple driving parts 32 are spaced apart on the operating lever 31 along the circumferential direction. The multiple driving parts 32 are correspondingly arranged with the multiple transmission gears 41, and the driving parts 32 mesh with the transmission gears 41. When the operating lever 31 rotates, it can drive the multiple driving parts 32 to rotate, and each driving part 32 can drive a transmission gear 41 to rotate, and the transmission gear 41 can drive the extended fixing member 20 to move through the protruding teeth 22.

[0046] It should be noted that a shaft is also provided on the transmission gear 41, and the shaft is rotatably disposed inside the acetabular cup 10.

[0047] Specifically, when the operating member 30 is in the first operating state, the operating member 30 drives at least one extension fixation member 20 to be inserted into the bone structure. The extension fixation member 20 inserted into the bone structure is in the first connection state, and the extension fixation member 20 not inserted into the bone structure is in the second connection state. The extension fixation member 20 in the second connection state is in the avoidance position.

[0048] The operating member 30 also has a third operating state. When the operating member 30 is in the third operating state, the drive part 32 corresponding to the extended fixing member 20 in the first connection state is detached from the operating lever, and the drive part 32 corresponding to the extended fixing member in the second connection state is installed to the operating lever 31.

[0049] To ensure that all extension fixation members 20 extend out of the acetabular cup 10 by the same length, resulting in more even force distribution on the acetabular cup 10, the operating member 30 is switched to the third operating state. This causes the operating rod 31 to drive the drive unit 32 to rotate, which in turn causes the extension fixation members 20 in the second connection state to extend and insert into the bone structure until the extension distance of the extension fixation members 20 in the second connection state is the same as that of the extension fixation members 20 in the first connection state. Then, the drive unit 32 that is not installed to the operating rod 31 is installed to the operating rod 31. At this time, the operating member 30 is in the second operating state, and the operating member 30 can drive all drive units 32 to rotate, causing all extension fixation members 20 to switch to the fixed position.

[0050] It should be noted that multiple drive units 32 are evenly spaced in the circumferential direction of the operating lever 31.

[0051] In this embodiment, the axes of the plurality of drive units 32 intersect at a single point. In other embodiments, the axes of the plurality of drive units 32 may not intersect at a single point.

[0052] like Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the drive unit 32 includes a drive rod 321, which is detachably mounted on the operating rod 31. When the operating member 30 is in the first operating state, at least one of the drive rods 321 is connected to the operating rod 31, while the remaining drive rods 321 are detached from the operating rod 31. The detachable nature of the drive rods 321 allows the operating member 30 to switch between the first and second operating states, and also makes the operating member 30 easier to manufacture compared to when the operating rod 31 and the multiple drive rods 321 are an integral structure.

[0053] When the operating member 30 is in the first operating state, in order to prevent the driving unit 32 from driving other transmission members 40, after the extension fixing member 20 moves a preset distance, the operating member 30 can be moved in the direction from the top of the acetabular cup 10 to the opening of the acetabular cup 10, so that the driving unit 32 is separated from the transmission member 40. After rotating the operating member 30 by a preset angle, the operating member 30 is installed on the acetabular cup 10 in the direction from the opening of the acetabular cup 10 to the top of the acetabular cup 10, and the extension fixing member 20 is driven to move again through the transmission member 40.

[0054] like Figure 5As shown, in this embodiment, the operating lever 31 is provided with a plurality of first mounting threaded holes 311, the axes of which are all set at an angle to the axis of the operating lever 31. From the top of the acetabular cup 10 to the opening of the acetabular cup 10, the distance between the axis of the first mounting threaded hole 311 and the axis of the operating lever 31 gradually decreases. A first threaded segment is provided on the outer surface of the drive unit 32, and the first threaded segment is threadedly engaged with the first mounting threaded hole 311. Through the engagement of the first threaded segment with the first mounting threaded hole 311, the drive unit 32 can be installed onto the operating lever 31. In the direction from the top of the acetabular cup 10 to the opening of the acetabular cup 10, the distance between the axis of the first mounting threaded hole 311 and the axis of the operating rod 31 gradually decreases. That is, in the direction from the top of the acetabular cup 10 to the opening of the acetabular cup 10, the diameter of the area enclosed by the end of the driving part 32 located outside the operating rod 31 is larger than the diameter of the area enclosed by the end of the driving part 32 located inside the operating rod 31. This facilitates the driving part 32 located outside the operating rod 31 to drive the transmission member 40 to rotate.

[0055] It should be noted that the first threaded section is located on the outer surface of the drive rod 321.

[0056] The axis of the first mounting threaded hole 311 is set to coincide with the axis of the drive rod 321.

[0057] like Figure 1 and Figure 2 As shown, in this embodiment, the acetabular prosthesis also includes a limiting cap 50, and the acetabular cup 10 is also provided with a second mounting threaded hole 12. The operating member 30 includes an operating rod 31, which includes an operating plate 312 and a rotating shaft 313 disposed on the operating plate 312. The rotating shaft 313 is rotatably disposed on the acetabular cup 10. The limiting cap 50 is threadedly engaged with the second mounting threaded hole 12 and abuts against the end of the operating plate 312 away from the rotating shaft 313. After the operating member 30 drives the extension fixing member 20 to move, that is, after the extension fixing member 20 switches from the avoidance position to the fixed position, the limiting cap 50 can rotate within the second mounting threaded hole 12 and abut against the operating plate 312. Thus, there is friction between the limiting cap 50 and the operating plate 312, which can limit the rotating shaft 313 and prevent the rotating shaft 313 from rotating. When the operating plate 312 is rotated, the operating plate 312 can drive the extension fixing member 20 to move because the rotating shaft 313 is rotatably mounted on the acetabular cup 10.

[0058] It should be noted that the first mounting threaded hole 311 is provided on the operation plate 312, that is, the drive unit 32 is mounted on the operation plate 312.

[0059] The axis of the operating lever 31 is the axis of the rotating shaft 313.

[0060] The acetabular cup 10 has a connecting hole, and the rotating shaft 313 is rotatably disposed in the connecting hole.

[0061] like Figure 2 and Figure 4 As shown, in this embodiment, an installation space 13 is provided within the acetabular cup 10, and the installation space 13 is connected to the receiving portion 11. The transmission member 40 is rotatably disposed within the installation space 13, and the second installation threaded hole 12 is connected to the installation space 13. The operating member 30 is located within the installation space 13. The installation space 13 is provided to facilitate the installation of the transmission member 40 into the acetabular cup 10. The second installation threaded hole 12 is connected to the installation space 13 to facilitate the insertion of the rotating shaft 313 through the second installation threaded hole 12 into the installation space 13.

[0062] It should be noted that the connection hole is connected to the installation space 13.

[0063] The acetabular cup 10 includes a first cup body 14 and a second cup body 15, with the first cup body 14 disposed on the outer periphery of the second cup body 15.

[0064] The receiving part 11, the mounting space 13 and the connecting hole are provided on the first cup body 14, and the second mounting threaded hole 12 is provided on the second cup body 15.

[0065] The receiving portion 11 is connected to the surface of the first cup body 14 near the second cup body 15, and the mounting space 13 is connected to the surface of the first cup body 14 near the second cup body 15. The mounting space 13 is located between the second cup body 15 and the connecting hole.

[0066] A first protruding ring 141 is provided on the first cup body 14. The first protruding ring 141 is located in the installation space 13, and the connecting hole is provided in the first protruding ring 141.

[0067] The second cup body 15 is provided with a second protruding ring 151, and the second mounting threaded hole 12 is provided inside the second protruding ring 151.

[0068] The first cup body 14 and the second cup body 15 can be connected by threads, or the first cup body 14 and the second cup body 15 can be welded together after the external fixing member 20 and the transmission member 40 are installed to the first cup body 14.

[0069] The acetabular cup 10 accommodates the concave portion of the femoral head prosthesis, which is the inner surface of the second cup body 15.

[0070] Before implantation, the acetabular prosthesis of this embodiment is first installed with the extension fixation member 20, the transmission member 40, and the operating member 30 respectively onto the acetabular cup 10. Then, the operating member 30 is put into the first operating state, and the operating member 30 drives one of the multiple transmission members 40 to rotate. In turn, the transmission member 40 can drive the extension fixation member 20 that is in transmission cooperation with the transmission member 40 to move. When the first end of the extension fixation member 20 extends out of the receiving part 11 and inserts into the bone structure, the acetabular cup 10 is initially fixed. Then, the operating member 30 is switched to the second operating state, and the operating member 30 drives the multiple transmission members 40 to rotate. In turn, the multiple extension fixation members 20 can extend out of the acetabular cup 10 and be inserted into the bone structure respectively. That is, the extension fixation member 20 is switched from the avoidance position to the fixed position, thereby fixing the acetabular cup 10 to the bone structure.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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) is provided with a receiving portion (11) that communicates with the outer surface of the acetabular cup (10). An extension fixing member (20) is movably disposed within the receiving portion (11) and has a fixed position extending out of the acetabular cup (10) and a clearance position located within the receiving portion (11). The moving direction of the extension fixing member (20) has an acute angle or a right angle with the axis of the acetabular cup (10). An operating element (30) is disposed on the acetabular cup (10) and drives the extension fixation element (20) to switch the extension fixation element (20) between the fixed position and the avoidance position; There are multiple receiving parts (11) and multiple extension fixing parts (20). The multiple receiving parts (11) and multiple extension fixing parts (20) are arranged in a one-to-one correspondence. The multiple receiving parts (11) are spaced apart around the axis of the acetabular cup (10). The operating member (30) and the multiple extension fixing parts (20) are driven to cooperate. The acetabular prosthesis also includes multiple transmission components (40), each of which is corresponding to one of the multiple extension fixing components (20). The multiple transmission components (40) are arranged around the outer periphery of the operating component (30) and are all in transmission cooperation with the operating component (30). The transmission component (40) is a transmission gear (41), and the extended fixing component (20) is provided with a plurality of protruding teeth (22). The operating component (30) includes an operating rod (31) and a plurality of driving parts (32). The operating rod (31) is rotatably disposed on the acetabular cup (10). The plurality of driving parts (32) are spaced apart on the operating rod (31) along the circumferential direction. The plurality of driving parts (32) are correspondingly disposed with the plurality of transmission gears (41), and the driving parts (32) mesh with the transmission gears (41). The drive unit (32) includes a drive rod (321), which is detachably mounted on the operating rod (31).

2. The acetabular prosthesis according to claim 1, characterized in that, The extension fixing member (20) includes an arc plate (21), the moving direction of the arc plate (21) is toward the plane where the opening of the acetabular cup (10) is located, and one end of the arc plate (21) is a tip (211). When the acetabular cup (10) is in the fixed position, the tip (211) is located outside the acetabular cup (10).

3. The acetabular prosthesis according to claim 1, characterized in that, The operating member (30) has a first operating state and a second operating state. When the operating member (30) is in the first operating state, the operating member (30) drives and cooperates with one of the multiple transmission members (40) so that the extended fixing member (20) that is driven and cooperates with the transmission member (40) can switch from the avoidance position to the fixed position. When the operating member (30) is in the second operating state, the operating member (30) drives and cooperates with all of the multiple transmission members (40).

4. The acetabular prosthesis according to claim 3, characterized in that, When the operating element (30) is in the first operating state, at least one of the plurality of driving rods (321) is connected to the operating rod (31), and the remaining driving rods (321) are separated from the operating rod (31).

5. The acetabular prosthesis according to claim 3, characterized in that, The operating lever (31) is provided with a plurality of first mounting threaded holes (311), the axes of the plurality of first mounting threaded holes (311) are all set at an angle to the axis of the operating lever (31), and the distance between the axis of the first mounting threaded hole (311) and the axis of the operating lever (31) gradually decreases from the top of the acetabular cup (10) to the mouth of the acetabular cup (10). The outer surface of the driving part (32) is provided with a first threaded segment, and the first threaded segment is threadedly engaged with the first mounting threaded hole (311).

6. The acetabular prosthesis according to claim 1 or 2, characterized in that, The acetabular prosthesis also includes a limiting cap (50), and the acetabular cup (10) is also provided with a second mounting threaded hole (12). The operating component (30) includes an operating rod (31), and the operating rod (31) includes an operating plate (312) and a rotating shaft (313) provided on the operating plate (312). The rotating shaft (313) is rotatably provided on the acetabular cup (10). The limiting cap (50) is threadedly engaged with the second mounting threaded hole (12) and abuts against the end of the operating plate (312) away from the rotating shaft (313).

7. The acetabular prosthesis according to claim 6, characterized in that, The acetabular prosthesis also includes a transmission component (40), the operating component (30) is driven to cooperate with the transmission component (40), the transmission component (40) is driven to cooperate with the extension fixation component (20), the acetabular cup (10) is provided with an installation space (13), the installation space (13) is connected to the receiving part (11), the transmission component (40) is rotatably disposed in the installation space (13), the second installation threaded hole (12) is connected to the installation space (13), and the operating component (30) is located in the installation space (13).

Images