Acetabular cup and matching tool thereof

Abstract

According to the technical scheme, the acetabular cup and the matched tool of the acetabular cup comprise the acetabular cup, the fine adjustment assembly, the liner and the tool. The acetabular cup is arranged on the outermost side, and a first opening is formed in the inner side of the bottom and connected with the fine adjustment assembly; the fine adjustment assembly is arranged between the acetabular cup and the liner and comprises a fixing part and an adjusting part, a second opening is formed in the fixing part, a connecting part is pushed through the second opening to enter the first opening in the acetabular cup to be connected and fixed, and a sliding rail and a fourth connecting part are arranged on the inner side of the fixing part; the adjusting part is a circular ring, the outer surface of the adjusting part is provided with a sliding ball in contact with the sliding rail, the upper surface of the adjusting part is provided with first sawteeth and a worm meshed with the first sawteeth, the two ends of the worm are symmetrically provided with a gear and a fifth connecting part respectively, and the fifth connecting part is hinged to a fourth connecting part on the fixing part to support the worm; second sawteeth are arranged on one side of the outer surface of the gasket and meshed with the gear on the adjusting part, so that deflection of the gasket is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, and in particular, to an acetabular cup prosthesis. BACKGROUND

[0002] Artificial hip arthroplasty is an effective method for treating end-stage hip diseases (such as osteoarthritis, femoral head necrosis, rheumatoid arthritis, severe fractures, etc.), and its core goal is to relieve pain, restore joint function, and improve the quality of life of patients. A standard artificial hip prosthesis mainly includes a femoral stem (with a femoral head) and an acetabular cup (with a liner). Among them, the acetabular cup is fixed in the acetabular bone of the patient, and the liner in it and the femoral head form a joint interface to achieve smooth hip joint movement.

[0003] At present, most of the acetabular cup systems widely used in clinical practice adopt a fixed-angle design. That is, after the acetabular cup shell is implanted, the relative angle (mainly including the abduction angle and the anteversion angle) between the liner and the shell is fixed and determined by the locking mechanism (such as a tapered interface, a buckle structure) between the liner and the cup shell at one time. The surgeon adjusts the implantation direction of the acetabular cup shell during the operation to indirectly achieve the desired joint angle. However, this fixed-angle design has significant limitations: low implantation angle tolerance, inability to achieve individualized precise matching, complex and traumatic revision surgery, poor adjustment flexibility, etc.; therefore, there is an urgent need in the art for an acetabular cup system that can overcome the above-mentioned shortcomings. The ideal design should still provide the ability to fine-tune the angle of the liner after the acetabular cup shell is implanted. In this way, the surgeon can fine-tune the angle of the liner according to the actual anatomy and activity of the patient after confirming the initial stability of the cup shell. SUMMARY

[0004] The main purpose of the present application is to provide an acetabular cup and its matching tools to solve the problem that the liner cannot be fine-tuned in the acetabular cup prosthesis of the prior art.

[0005] In order to achieve the above object, the application provides a hip cup, which specifically comprises: a hip cup, which is uniformly provided with three first openings on the inner side of the bottom; a fine adjustment assembly, which comprises a fixed part and an adjustment part, the fixed part is composed of an outer shell and a bottom ring, the lower outer side surface of the fixed part is uniformly provided with three second openings, the second openings are provided with connecting parts and connected with the hip cup through the connecting parts, the connecting parts comprise a first connecting part, a second connecting part and a third connecting part, the bottom inner side of the fixed part is provided with a sliding rail, and the inner part of the fixed part is further provided with a fourth connecting part; the adjustment part is a ring, which is connected with the sliding rail of the fixed part through sliding balls uniformly arranged on the outer side surface of the adjustment part, the upper surface of the adjustment part is uniformly provided with first sawteeth, the adjustment part is provided with a worm meshing with the first sawteeth, the worm is symmetrically provided with gears at both ends, the worm is further symmetrically provided with a fifth connecting part in the shape of a cylinder, the worm is hingedly connected with the fourth connecting part through the fifth connecting part, and the bottom surface of the adjustment part is uniformly provided with three third openings in the shape of triangular blocks; a gasket, which is provided with second sawteeth on one side of the outer surface, and the second sawteeth mesh with the gears in the adjustment part.

[0006] Further, the diameter of the bottom of the fixed part is consistent with the inner diameter of the hip cup, the size and shape of the upper outer shell are consistent with the inner surface of the hip cup, the diameter of the bottom of the adjustment part is consistent with the inner diameter of the fixed part, and the diameter of the bottom of the gasket is consistent with the inner diameter of the adjustment part, and the outer surface of the gasket is in contact with the inner surface of the fixed part, so that the fine adjustment assembly is arranged between the hip cup and the gasket, which is beneficial to enhance the mechanical properties of the hip cup prosthesis as a whole.

[0007] Further, the first connecting part in the connecting part is in the shape of a crescent, which is beneficial to connect the fixed part with the hip cup, the second connecting part is a cylinder and is fixedly connected with the first connecting part, and the third connecting part is in the shape of a cylinder with a larger diameter than the second connecting part and is fixedly connected with the second connecting part, so that the first connecting part can be pushed into the first opening in the hip cup.

[0008] Further, the number of the first openings is consistent with that of the second openings, the first opening is in the shape of a crescent-shaped channel consistent with the first connecting part, the upper part of the second opening is in the shape of a crescent-shaped channel consistent with the first connecting part, and the lower part is in the shape of a crescent-shaped channel consistent with the diameter of the second connecting part, so that the connecting part can be pushed into the first opening through the second opening to realize the connection and fixation of the fixed part and the hip cup.

[0009] Further, the sliding ball is a hemisphere, and its diameter is the same as that of the sliding rail, so that the adjustment part can rotate without being separated from the hip cup prosthesis.

[0010] Further, the gear is a half gear, and the half gear is uniformly provided with tooth grooves, so that the tooth grooves can match the second sawtooth on the gasket, and meanwhile, the angle of the gasket can be prevented from being excessively deviated.

[0011] Further, the screw threads on the worm have different pitches, so that the deflection angle of the gasket can be precisely controlled by using the worm with different pitches.

[0012] Further, according to another aspect of the present application, a regulating tool for regulating the fine adjustment assembly is provided, which comprises a push rod and a sleeve, the push rod is a hollow shell, and the push rod is further provided with a buckle, the push rod is internally provided with a spring connected with the buckle, the push rod is further provided with a ball head, and the diameter of the ball head is consistent with the diameter of the gasket; the sleeve is sleeved on the push rod, the sleeve is uniformly provided with three first fixing blocks, the first fixing blocks are internally provided with rotating rods, and the first fixing blocks are further provided with sixth connecting parts hingedly connected with the rotating rods, the sixth connecting parts are provided with second fixing blocks, and the second fixing blocks are triangular blocks with shapes and sizes consistent with the third apertures.

[0013] By using the technical scheme of the present application, the acetabular cup and the matched tool thereof comprise an acetabular cup, a fine adjustment assembly, a gasket and a tool. The acetabular cup is arranged at the outermost side, and the inner side of the bottom is provided with a first aperture connected with the fine adjustment assembly; the fine adjustment assembly is arranged between the acetabular cup and the gasket, and the fine adjustment assembly comprises a fixed part and an adjusting part, the fixed part is provided with a second aperture, and the connecting part is pushed into the first aperture of the acetabular cup through the second aperture to be connected and fixed, the inner side of the fixed part is provided with a sliding rail and a fourth connecting part; the adjusting part is a circular ring, the outer surface of the adjusting part is provided with a sliding ball in contact with the sliding rail, so that the adjusting part can be rotated, the adjusting part is provided with a first sawtooth on the upper surface, and the adjusting part is further provided with a worm meshing with the first sawtooth, the two ends of the worm are symmetrically provided with a gear and a fifth connecting part, respectively, the fifth connecting part is hingedly connected with the fourth connecting part on the fixed part, so as to support the worm; the outer surface of the gasket is provided with a second sawtooth meshing with the gear on the adjusting part, so as to realize the deflection of the gasket.

[0014] Therefore, the technical scheme of the present application can realize the precise adjustment of the angle of the gasket in the acetabular cup prosthesis. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A top view of the acetabular cup, the fine adjustment assembly and the gasket combination is shown; Figure 2 A sectional view of the acetabular cup, the fine adjustment assembly and the gasket combination is shown; Figure 3 A side view of the acetabular cup is shown; Figure 4 A side view of the fixing part is shown; Figure 5 A schematic view of the connecting part is shown; Figure 6 A schematic view of the adjusting part and the liner assembly is shown; Figure 7 A schematic view of the tool is shown; Figure 8 A sectional view of the tool is shown; Wherein, the above figures include the following reference signs: 1, acetabular cup; 10, first opening; 2, fine adjustment assembly; 20, fixing part; 200, second opening; 201, connecting part; 2010, first connecting part; 2011, second connecting part; 2012, third connecting part; 202, sliding rail; 203, fourth connecting part; 21, adjusting part; 210, sliding ball; 211, first sawtooth; 212, worm; 213, gear; 214, fifth connecting part; 215, third opening; 3, liner; 30, second sawtooth; 4, tool; 40, pushing rod; 400, buckle; 401, spring; 402, ball head; 41, sleeve; 410, first fixing block; 411, rotating rod; 412, sixth connecting part; 413, second fixing block. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0017] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0018] The foregoing is a summary and thus contains only the most basic embodiment. The application can be practiced with the specific embodiments and options described herein, and it can also be practiced without such specific embodiments and options. Furthermore, the preceding description and drawings should not be construed as limiting the application. Numerous and various embodiments can be derived from this description and these embodiments can be practiced, without departing from the scope of the application. Specific embodiments are discussed in the description that follows, and numerous options, alternatives, and variations thereof, can be discussed as follows. It is to be understood that other embodiments can be utilized and operational changes can be made without departing from the scope of the present application. Specifically, it is contemplated that, where certain embodiments are described in this detailed description in the context of their contributions to the various aspects and / or features of the present application, that these contributions are to be understood as being separate and apart from other contributions described elsewhere herein. Thus, although embodiments of the application can be described and illustrated using these contributions, these are to be understood as being illustrative of the various aspects and / or features of the present application. As such, these contributions are to be understood as being illustrative of the various aspects and / or features of the present application. These and other changes can be made to the application in light of the above-detailed description. The application's scope is to be measured only by reference to the following claims. Accordingly, there is no intention, with respect to the description of specific embodiments, of under-including what is otherwise intended to be covered by the claims. The application has been described in considerable detail with specific reference to certain embodiments. It will be apparent to those skilled in the art that various modifications can be made and equivalents can be substituted for certain procedures, materials and devices. It is therefore intended that the application not be limited to the particular embodiments described. The application should only be limited by the claims.

[0019] As Figures 1-6As shown: a kind of acetabular cup, including acetabular cup 1, the first aperture 10 of the acetabular cup 1 is crescent channel;Fine adjustment component 2, the fine adjustment component 2 includes fixed part 20 and adjustment part 21, the fixed part 20 includes upper shell and bottom ring, the bottom of fixed part 20 is uniformly provided with three second openings 200, the second opening 200 is provided with connecting component 201 inside, the connecting component 201 includes first connecting part 2010, second connecting part 2011 and third connecting part 2012, the first connecting part 2010 is crescent shape, the second connecting part 2011 is cylinder and is fixedly connected with the first connecting part, the third connecting part 2012 is the cylinder with the diameter greater than the second connecting part 2011, and is fixedly connected with the second connecting part;The upper portion of the second opening 200 is the crescent channel consistent with the first connecting part 2010, and the lower portion is the crescent channel consistent with the diameter of the second connecting part 2011, the inner side of the bottom of the fixed part 20 is provided with slide rail 202, and the fourth connecting part 203 is symmetrically provided in the fixed part 20, the fourth connecting part 203 is cuboid, and the surface is provided with circular opening;The adjustment part 21 is solid ring, the outer surface of the adjustment part 21 is uniformly provided with sliding ball 210, the sliding ball 210 is half sphere, and the diameter is consistent with the diameter of the above-mentioned slide rail 202, the upper surface of the adjustment part 21 is uniformly provided with first sawtooth 211, the adjustment part 21 is provided with worm 212 engaged with the first sawtooth 211, the gear 213 and the fifth connecting part 214 are symmetrically provided at both ends of the worm 212 respectively, the gear 213 is uniformly provided with half tooth slot, the fifth connecting part 214 is cylinder and is hingedly connected with the fourth connecting part 203, to support the worm, the bottom surface of the adjustment part 21 is uniformly provided with three third openings 215, and the tool 4 is cooperated to realize the rotation of the adjustment part, the third opening 215 is shaped as triangular block opening;Gasket 3, the surface of the gasket 3 is provided with second sawtooth 30, and the second sawtooth 30 can be engaged with the above-mentioned gear 213.

[0020] As Figure 1 shown, an acetabular cup prosthesis includes an acetabular cup 1, a fine adjustment component 2, the fine adjustment component includes a fixed part 20 and an adjustment part 21, and a gasket 3, the fine adjustment component 2 is arranged between the acetabular cup 1 and the gasket 3, the fixed part 20 is uniformly provided with three second openings 200, the second opening 200 is provided with connecting component 201 to realize the connection with the acetabular cup 1, and the adjustment part 21 is uniformly provided with three third openings 215.

[0021] As Figure 2As shown, an acetabular cup prosthesis has the following characteristics: the bottom diameter of the fixing part 20 is the same as the inner diameter of the acetabular cup 1, and the size and shape of the upper outer shell are the same as the inner surface of the acetabular cup 1; the bottom diameter of the adjusting part 21 is the same as the inner diameter of the fixing part 20; the bottom diameter of the pad 3 is the same as the inner diameter of the adjusting part 21, and its outer surface is in contact with the inner surface of the fixing part 20; the adjusting part 21 contacts and slides with the slide rail 202 on the inner side of the fixing part 20 via a sliding ball 210; the upper surface of the adjusting part 21 is provided with a first serration 211, which meshes with a worm gear 212; the worm gear 212 is symmetrically provided with gears 213 and a fifth connecting part 214 at both ends; the fifth connecting part 214 is hinged to the fourth connecting part 203 inside the fixing part 20 to support the worm gear 212; a second serration 30 is provided on one side surface of the pad 3, which meshes with the gear 213 to achieve deflection of the pad 3.

[0022] like Figure 3 As shown, the acetabular cup 1 includes a shell and a bottom ring. Three first openings 10 are evenly distributed on the inner surface of the ring. The first openings 10 are crescent-shaped channels.

[0023] like Figure 4 As shown, the fixing part 20 includes an upper outer shell and a bottom ring. Three second openings 200 are evenly distributed on the outer side of the bottom ring. A connecting component 201 is provided in the second opening 200. The connecting component includes a first connecting part 2010, a second connecting part 2011, and a third connecting part 2012. The upper part of the second opening 200 is a crescent-shaped channel consistent with the first connecting part 2010, and the lower part is a crescent-shaped channel with the same diameter as the second connecting part 2011. This allows the third connecting part 2012 to push the entire connecting component 201 into the first opening 10 in the acetabular cup 1, thereby realizing the connection between the acetabular cup 1 and the fixing part 20. A slide rail 202 is provided on the inner side of the bottom of the fixing part 20, and a fourth connecting part 203 is provided inside it.

[0024] like Figure 5 As shown, the connecting component 201 includes a first connecting part 2010, a second connecting part 2011, and a third connecting part 2012. The first connecting part 2010 is crescent-shaped, the second connecting part 2011 is cylindrical and fixedly connected to the first connecting part, and the third connecting part 2012 is cylindrical with a diameter larger than that of the second connecting part 2011 and fixedly connected to the second connecting part.

[0025] like Figure 6As shown, the adjusting part 21 and the pad 3 are assembled. The adjusting part 21 is annular in shape, and its outer surface is uniformly provided with sliding balls 210. The sliding balls 210 are hemispherical, and their diameter is the same as that of the slide rail 202. The upper surface of the adjusting part 21 is uniformly provided with first serrations 211. A worm 212 is provided on the upper part of the adjusting part 21 and meshes with the first serrations 211. The two ends of the worm 212 are symmetrically provided with gears 213 and fifth connecting parts 214. The gears 213 are uniformly provided with half of the tooth grooves. The fifth connecting parts 214 are hinged to the fourth connecting parts 203 on the fixed part 20. The outer surface of the pad 3 is provided with second serrations 30, which mesh with the gears 213. At the same time, the thread on the worm 212 can be adjusted according to the pitch of the thread to control the deflection angle of the pad at different stages.

[0026] like Figure 7 As shown, a tool 4 used in conjunction with the aforementioned acetabular cup prosthesis includes a push rod 40 and a sleeve 41. The push rod 40 is provided with a buckle 400 to limit the sleeve. The push rod 40 is also provided with a ball head 402, the diameter of which is the same as the inner diameter of the aforementioned pad 3. The sleeve 41 is fitted onto the outer surface of the push rod 40. Three first fixing blocks 410 are evenly arranged on the outer surface of the sleeve 41. A sixth connecting part 412 is connected to the first fixing block 410. A second fixing block 413 is connected to the sixth connecting part 412. The second fixing block 413 is a triangular block, the shape and size of which are the same as the third opening 215 on the aforementioned adjustment part 21.

[0027] like Figure 8 As shown, tool 4 includes a push rod 40 and a sleeve 41. The push rod 40 is a hollow shell, and the ball head 402 is a solid sphere. A spring 401 is provided inside the push rod 40 and connected to a buckle 400 to limit the position of the sleeve 41. A first fixing block 410 is connected to the sleeve 41. A rotating rod 411 is provided inside the first fixing block 410. A sixth connecting part 412 is hinged to the rotating rod 411.

[0028] When using this invention, the specific technical effects brought about by the embodiments are as follows: First, after the acetabular cup of this embodiment is implanted into the human body, the fine-tuning component is placed inside the acetabular cup, and the second opening on the fixing part is aligned with the first opening on the acetabular cup. Then, the connecting component in the fixing part is pushed out of the second opening and then pushed into the first opening in the acetabular cup to achieve the connection and fixation between the fixing part and the acetabular cup. Next, the liner is placed inside the fine-tuning component, and when placing it, the end of the liner with the second serration is aligned with the worm gear on the adjusting part. When it is necessary to adjust the angle of the liner, The ball end of the tool is placed into the pad, and the sleeve is pushed down along the push rod to below the buckle, so that the buckle limits the sleeve. Then, the second fixing block is placed into the third opening on the bottom surface of the adjusting part. Then, the sleeve is rotated to drive the adjusting part to rotate. The first sawtooth on the adjusting part drives the worm to rotate, which in turn drives the gears at both ends of the worm to rotate. The rotation of the gears causes the second sawtooth on the meshing pad to deflect, thereby realizing the adjustment of the pad angle. At the same time, during this process, the push rod in the tool prevents the pad from rotating with the adjusting part to avoid unnecessary angle deflection.

[0029] In summary, this invention, by incorporating a fine-tuning component between the acetabular cup and the liner, enables fine-tuning of the liner angle even after the acetabular cup shell has been implanted. This allows physicians to precisely adjust the liner angle based on the patient's actual anatomy and activity level after confirming initial stability of the cup shell.

[0030] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this 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 a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0031] 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.

[0032] 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.

[0033] 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 cup, characterized in that, include: A acetabular cup (1), wherein a plurality of first openings (10) are evenly distributed on the inner bottom side of the acetabular cup (1); A fine-tuning component (2) is disposed inside and connected to the acetabular cup (1), the fine-tuning component (2) comprising: The fixing part (20) has a shell at the top and an annular shape at the bottom. Multiple second openings (200) are evenly distributed on the outer surface of the lower part of the fixing part (20). A connecting component (201) is provided inside the second opening (200). The connecting component (201) includes a first connecting part (2010), a second connecting part (2011), and a third connecting part (2012). A slide rail (202) is provided on the inner side of the lower part of the fixing part (20). A fourth connecting part (203) is symmetrically arranged inside the fixing part (20). The fourth connecting part (203) is rectangular in shape. Adjustment part (21), said adjustment part (21) is annular and includes: Sliding balls (210) are evenly distributed on the outer surface of the adjustment part (21). The first sawtooth (211) is evenly distributed on the upper surface of the adjustment part (21). A worm gear (212) is disposed on the upper part of the adjustment part (21) and meshes with the first saw tooth (211). Gears (213), which are symmetrically arranged at both ends of the worm (212), The fifth connecting part (214) is a cylinder, symmetrically arranged at both ends of the worm (212), and hinged to the fourth connecting part (203). The third opening (215) is in the shape of a triangular block and is evenly distributed on the lower surface of the adjustment part (21). The pad (3) has a second serration (30) on one side of its outer surface, which meshes with the gear (213).

2. The acetabular cup according to claim 1, characterized in that, The bottom diameter of the fixing part (20) is the same as the inner diameter of the acetabular cup (1), and the size and shape of the upper outer shell are the same as the inner surface of the acetabular cup (1); the bottom diameter of the adjusting part (21) is the same as the inner diameter of the fixing part (20); the bottom diameter of the pad (3) is the same as the inner diameter of the adjusting part (21), and the outer surface of the pad (3) is in contact with the inner surface of the fixing part (20).

3. The acetabular cup according to claim 1, characterized in that, The first connecting part (2010) is crescent-shaped, the second connecting part (2011) is a cylinder and is fixedly connected to the first connecting part, and the third connecting part (2012) is a cylinder with a diameter larger than that of the second connecting part (2011) and is fixedly connected to the second connecting part.

4. The acetabular cup according to claim 1, characterized in that, The number of the first opening (10) and the second opening (200) are the same. The shape of the first opening (10) is a crescent-shaped channel that is consistent with the shape of the first connecting part (2010). The upper part of the second opening (200) is a crescent-shaped channel that is consistent with the size and shape of the first connecting part (2010), and the lower part is a crescent-shaped channel that is consistent with the diameter of the second connecting part (2011).

5. The acetabular cup according to claim 1, characterized in that, The sliding ball (210) is a hemisphere, and its diameter is the same as that of the slide rail (202).

6. The acetabular cup according to claim 1, characterized in that, The gear (213) is a half gear, and tooth grooves are evenly distributed on the half gear.

7. The acetabular cup according to claim 1, characterized in that, The threads on the worm (212) have different pitches.

8. A tool (4) for use with the acetabular cup according to any one of claims 1-7, characterized in that: Includes a push rod (40) and a sleeve (41). The push rod (40) is a hollow shell and is also provided with a buckle (400). A spring (401) is provided inside the push rod (40) and connected to the buckle (400). The push rod (40) is also provided with a ball head (402), which is a solid sphere with a diameter consistent with that of the gasket (3). The sleeve (41) is fitted onto the outer surface of the push rod (40). 1) Multiple first fixing blocks (410) are evenly distributed on the top. A rotating rod (411) is provided inside the first fixing block (410). The rotating rod (411) is a cylinder and is provided with a sixth connecting part (412) that is hinged to the rotating rod (411). The sixth connecting part (412) is cuboid in shape. A second fixing block (413) is provided on the sixth connecting part (412). The second fixing block (413) is a triangular block with the same shape and size as the third opening (215) mentioned above.

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