A hip cup prosthesis

Abstract

A kind of acetabular cup prosthesis includes acetabular cup, inner liner and stretch. Two first and third openings with arc-shaped openings are symmetrically arranged in the lower and upper halves of the acetabular cup side, respectively, and second and fourth openings are arranged in the inner part, respectively, and the top of the inner surface is provided with a fifth opening composed of a sphere and a triangular accommodating hole, and the outer surface of the side is provided with an arc-shaped first recess. The inner liner is arranged in the acetabular cup, the side has serrations, the top is hingedly connected with a first fixing block with a second fixing block and a first spring in a second recess, and can be compressed and pushed into the fifth opening for limiting. The stretch includes a first and second stretch and a transmission part, which are respectively arranged in the first and third openings, can be rotated and are respectively connected with the third and fifth fixing blocks, and the two sides are provided with rotating blocks; the transmission part is a triangular elastic member, the two ends are wound and connected with the grooves of the two and are hingedly fixed, and one end is engaged with the stop gear through the opening to drive the second stretch to rotate.

Description

Technical Field

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

[0002] Total hip arthroplasty (THA) is one of the most successful surgical procedures for treating end-stage hip diseases, effectively relieving pain and restoring joint function. However, with the increasing number of surgeries and the younger age and higher activity levels of the patient population, postoperative mid- to long-term complications are becoming increasingly prominent, placing higher demands on the long-term stability and survival rate of the prosthesis. Among these, the acetabular cup, as a key component supporting the femoral head prosthesis after replacement, directly determines the success of the surgery and the patient's postoperative quality of life through its long-term stability.

[0003] Currently, the acetabular cups widely used in clinical practice achieve initial and long-term fixation in two main ways: one is mechanical compression fixation assisted by screws; the other is to use a porous coating (such as titanium beads, tantalum metal or 3D printed porous structure) on the surface of the acetabular cup to promote host bone ingrowth and achieve biological fixation.

[0004] However, long-term clinical follow-up has revealed that existing acetabular cups still face a high risk of long-term loosening. The core reasons for loosening include: Micromovement and wear at the interface: Postoperative patient activity generates cyclic loads that cause micromovements between the acetabular cup and the host bone interface. This not only hinders effective bone ingrowth but also produces polyethylene or metal wear particles. These particles can induce a local macrophage response, leading to osteolysis, further widening the interfacial gap, creating a vicious cycle, and ultimately causing aseptic loosening.

[0005] Insufficient initial stability: For patients with osteoporosis or hip dysplasia, traditional compression fixation is insufficient to achieve adequate initial torque. If fixation relies solely on auxiliary screws, these screws are prone to breakage or reverse slippage in the long term, and the risk of neurovascular injury is increased.

[0006] Creep and loosening under dynamic loads: During daily activities such as walking and climbing stairs, the acetabular cup is subjected to cyclic alternating stresses. Existing fixed interfaces (such as simple bone cement or press-fitting) are difficult to fully adapt to this complex physiological load. Long-term action can easily lead to plastic deformation or fatigue failure of the interface, inducing progressive loosening.

[0007] Therefore, improving the long-term anti-rotation stability of the acetabular cup in vivo, effectively resisting interfacial micromovements under dynamic physiological loads, reducing stress shielding and osteolysis caused by wear particles, and promoting rapid and firm ingrowth of bone tissue are urgent technical challenges to be solved in the field of artificial hip joints. Summary of the Invention

[0008] The main objective of this invention is to provide an acetabular cup prosthesis to solve the problem of insufficient stability of the acetabular cup after implantation in the human body.

[0009] To achieve the above objectives, the present invention provides an acetabular cup prosthesis, specifically comprising: an acetabular cup, an inner liner, and an extension portion. The lower half of the side surface of the acetabular cup has two symmetrically arranged first openings, and the upper half of the side surface of the acetabular cup has two symmetrically arranged third openings. The inner liner is disposed inside the acetabular cup, and its side surface is symmetrically provided with serrations. The extension portion is symmetrically disposed inside the acetabular cup, and the extension portion includes a first extension portion, a second extension portion, and a transmission portion. The first extension portion has ratchet teeth evenly arranged on its outer surface, which mesh with the serrations on the inner liner. The transmission portion connects the first extension portion and the second extension portion.

[0010] Furthermore, the first opening on the acetabular cup is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup. The first opening penetrates to the inner surface of the acetabular cup. Circular second openings are symmetrically arranged on both sides inside the first opening. The third opening is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup. Circular fourth openings are symmetrically arranged on both sides inside the third opening. A fifth opening is symmetrically arranged on the inner surface of the top of the acetabular cup. The fifth opening consists of a spherical receiving hole and a triangular receiving hole, with its bottom penetrating to the inner surface of the acetabular cup. Arc-shaped first recesses are symmetrically arranged on both outer surfaces of the acetabular cup. The first recesses are located between the first and third openings and can accommodate the first extension portion and the second extension portion.

[0011] Furthermore, the top outer surface of the inner liner gasket is symmetrically provided with an arc-shaped second recess, and a first fixing block is hinged to the second recess. The head of the first fixing block is provided with a second fixing block in the shape of a sphere, and the bottom of the first fixing block is connected to a first spring. The first fixing block and the second fixing block can be compressed and placed into the second recess. At the same time, the first fixing block and the second fixing block can be pushed into the fifth opening in the acetabular cup. After the second fixing block is pushed in, it can be locked into the sphere receiving hole of the fifth opening for limiting.

[0012] Furthermore, cylindrical second rotating blocks are symmetrically arranged on both sides of the first extension portion. The diameter of the second rotating blocks matches the diameter of the second opening. The second rotating blocks are placed in the second opening and can rotate. Cylindrical fourth rotating blocks are symmetrically arranged on both sides of the second extension portion. The diameter of the fourth rotating blocks matches the diameter of the fourth opening. The fourth rotating blocks are placed in the fourth opening and can rotate.

[0013] Furthermore, the first extension portion is disposed within the first opening and is rotatable. The ratchet of the first extension portion can extend from the first opening to the inner surface of the acetabular cup and engage with the serrations on the inner liner. The second extension portion is disposed within the third opening and is rotatable. The first extension portion is connected to an arc-shaped third fixing block, and the second extension portion is connected to an arc-shaped fifth fixing block. The third fixing block can extend from the arc-shaped opening of the first opening, and the fifth fixing block can extend from the arc-shaped opening of the third opening.

[0014] Furthermore, cylindrical first rotating blocks are symmetrically arranged on both sides of the first extension portion, and a first groove is provided on the outer surface of the middle part of the first rotating block, the first groove having a triangular cross-section; cylindrical third rotating blocks are symmetrically arranged on both sides of the second extension portion, and a second groove is provided on the outer surface of the middle part of the third rotating block, the second groove having a triangular cross-section.

[0015] Furthermore, a cylindrical fourth fixing block is provided in the first groove, a plurality of triangular stop teeth are evenly provided in the second groove, and a cylindrical sixth fixing block is provided in the second groove.

[0016] Furthermore, the transmission part is made of elastic material, and its cross-section is a triangle that meshes with the first groove and the second groove. Both ends of the transmission part are wound and connected within the first groove and the second groove. The two ends of the transmission part are provided with a sixth opening and a seventh opening that pass through. The sixth opening is hinged to the fourth fixing block, and the seventh opening is hinged to the sixth fixing block. A plurality of eighth openings are evenly provided at one end of the transmission part wound around the second groove. The eighth openings mesh with the stop teeth, so that when the transmission part rotates, it can drive the second extension part to rotate.

[0017] According to the technical solution of this invention, an acetabular cup prosthesis includes an acetabular cup, an inner liner, and an extension portion. Two first openings are symmetrically arranged on the lower half of the side surface of the acetabular cup. Each first opening is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup. The first openings penetrate to the inner surface of the acetabular cup. Circular second openings are symmetrically arranged on both sides inside the first openings. Two third openings are symmetrically arranged on the upper half of the side surface of the acetabular cup. Each third opening is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup. Circular fourth openings are symmetrically arranged on both sides inside the third openings. A fifth opening is symmetrically arranged on the top of the inner surface of the acetabular cup. The fifth opening consists of a spherical receiving hole and a three-... The device comprises an angular receiving hole, the bottom of which extends to the inner surface of the acetabular cup. A first arc-shaped recess is symmetrically arranged on the outer side surface of the acetabular cup, positioned between the first and third openings. This first recess can accommodate the first and second extension portions. An inner liner is disposed inside the acetabular cup. The outer side surface of the inner liner is symmetrically provided with serrations. A second arc-shaped recess is symmetrically arranged on the outer top surface of the inner liner. A first fixing block is hinged to the second recess. The head of the first fixing block has a second fixing block in the shape of a sphere, and the bottom of the first fixing block is connected to a first... A spring is included, allowing the first and second fixing blocks to be compressed into the second recess. Simultaneously, the first and second fixing blocks can be pushed into the fifth opening in the acetabular cup. After being pushed in, the second fixing block engages with the ball-receiving hole of the fifth opening for positioning. The extension portion is disposed inside the acetabular cup and includes a first extension portion, a second extension portion, and a transmission portion. The first extension portion is disc-shaped, with ratchet teeth evenly distributed on its exterior. The first extension portion is disposed within the first opening and can rotate. The ratchet teeth of the first extension portion can extend from the first opening into the acetabular cup. The surface of the first extension part contacts and engages with the serrations on the inner lining gasket. The first extension part is connected to an arc-shaped third fixing block, which can extend out from the arc-shaped opening of the first hole. Cylindrical first rotating blocks are symmetrically arranged on both sides of the first extension part. A first groove is provided on the outer surface of the middle part of the first rotating block. The cross-section of the first groove is triangular. A cylindrical fourth fixing block is provided in the first groove. Cylindrical second rotating blocks are also symmetrically arranged on both sides of the first extension part. The diameter of the second rotating block matches the diameter of the second hole. The second rotating block is placed in the second hole and can rotate.The second extension is disc-shaped and is disposed within the third opening, allowing it to rotate. An arc-shaped fifth fixing block is connected to the second extension, extending from the arc-shaped opening of the third opening. Cylindrical third rotating blocks are symmetrically arranged on both sides of the second extension. A second groove with a triangular cross-section is formed on the outer surface of the middle portion of each third rotating block. Multiple triangular stop teeth are evenly arranged within the second groove. A cylindrical sixth fixing block is also disposed within the second groove. Cylindrical fourth rotating blocks are symmetrically arranged on both sides of the second extension, with the diameter of the fourth rotating block being equal to that of the fourth opening. With a matching diameter, the fourth rotating block can be placed inside the fourth opening and rotate; the transmission part is made of elastic material, and its cross-section is a triangle that meshes with the first and second grooves. Both ends of the transmission part are wound around and connected within the first and second grooves. A sixth and a seventh opening are provided at both ends of the transmission part. The sixth opening is hinged to the fourth fixed block, and the seventh opening is hinged to the sixth fixed block. Multiple eighth openings are evenly distributed at one end of the transmission part wound around the second groove. These eighth openings mesh with the stop teeth, so that when the transmission part rotates, it can drive the second extension part to rotate.

[0018] Therefore, the technical solution of this application can enhance the stability of the acetabular cup after implantation into the human body by setting an extension component, thereby enhancing the overall stability of the prosthesis. Attached Figure Description

[0019] 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: Figure 1 A schematic diagram of the acetabular cup prosthesis is shown. Figure 2 A cross-sectional view of the acetabular cup prosthesis is shown; Figure 3 A schematic diagram of the acetabular cup is shown; Figure 4 A schematic diagram of the inner liner gasket is shown; Figure 5 A side view of the extension is shown; Figure 6 A schematic diagram of the first extension is shown; Figure 7 A schematic diagram of the second extension is shown; Figure 8 A schematic diagram of the transmission unit is shown.

[0020] The above-mentioned figures include the following reference numerals: 1. Acral cup; 10. First opening; 100. Second opening; 11. Third opening; 110. Fourth opening; 12. Fifth opening; 13. First recess; 2. Inner liner; 20. Serration; 21. Second recess; 22. First fixing block; 220. Second fixing block; 221. First spring; 3. Extension part; 30. First extension part; 300. Racket tooth; 301. Third fixing block; 302. First rotating block; 303. First groove; 304. Fourth fixing block; 305. Second rotating block; 31. Second extension part; 310. Fifth fixing block; 311. Third rotating block; 312. Second groove; 313. Stop tooth; 314. Sixth fixing block; 315. Fourth rotating block; 32. Transmission part; 320. Sixth opening; 321. Seventh opening; 322. Eighth opening. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 1-8As shown: An acetabular cup prosthesis includes an acetabular cup 1, an inner liner 2, and an extension portion 3. Two first openings 10 are symmetrically arranged on the lower half of the side of the acetabular cup 1. Each first opening 10 is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup 1. The first openings 10 penetrate to the inner surface of the acetabular cup 1. Circular second openings 100 are symmetrically arranged on both sides inside the first openings 10. Two third openings 11 are symmetrically arranged on the upper half of the side of the acetabular cup 1. Each third opening 11 is a disc-shaped perforation connected to an arc-shaped opening extending to the outer surface of the acetabular cup 1. Circular fourth openings 110 are symmetrically arranged on both sides inside the third openings 11. A fifth opening 12 is symmetrically arranged on the top of the inner surface of the acetabular cup 1. The fifth opening 12 consists of a spherical receiving hole and a triangular receiving hole, and its bottom penetrates to the inner surface of the acetabular cup 1. An arc-shaped first recess 13 is symmetrically arranged on the outer side of the acetabular cup 1. The first recess 13 is provided with… Between the first opening 10 and the third opening 11, the first recess 13 can accommodate the first extension 30 and the second extension 31; the inner liner 2 is disposed inside the acetabular cup 1, the outer surface of the side of the inner liner 2 is symmetrically provided with serrations 20, the outer surface of the top of the inner liner 2 is symmetrically provided with an arc-shaped second recess 21, the second recess 21 is hinged to a first fixing block 22, the head of the first fixing block 22 is provided with a second fixing block 220 in the shape of a sphere, the bottom of the first fixing block 22 is connected to a first spring 221, the first fixing block 22 and the second fixing block 220 can be compressed into the second recess 21, and at the same time the first fixing block 22 and the second fixing block 220 can be pushed into the fifth opening 12 in the acetabular cup 1, and after the second fixing block 220 is pushed in, it can be locked into the spherical receiving hole of the fifth opening 12 for limiting;The extension portion 3 is disposed inside the acetabular cup 1. The extension portion 3 includes a first extension portion 30, a second extension portion 31, and a transmission portion 32. The first extension portion 30 is disc-shaped, and ratchet teeth 300 are evenly distributed on its exterior. The first extension portion 30 is disposed within the first opening 10 and can rotate. The ratchet teeth 300 of the first extension portion 30 can extend from the first opening 10 to the inner surface of the acetabular cup 1 and engage with the serrations 20 on the inner liner gasket 2. The first extension portion 30 is connected to an arc-shaped third fixing block 301, which can extend from the arc-shaped opening of the first opening 10. Circular teeth 300 are symmetrically arranged on both sides of the first extension portion 30. A columnar first rotating block 302 has a first groove 303 on its outer surface. The groove 303 has a triangular cross-section and a cylindrical fourth fixing block 304 is disposed within it. Cylindrical second rotating blocks 305 are symmetrically arranged on both sides of the first extension 30. The diameter of the second rotating blocks 305 matches the diameter of the second opening 100. The second rotating blocks 305 are placed within the second opening 100 and can rotate. The second extension 31 is disc-shaped and is disposed within the third opening 11, where it can rotate. The second extension 31 is connected to an arc-shaped fifth fixing block 310. 310 can extend from the arc-shaped opening of the third opening 11. Cylindrical third rotating blocks 311 are symmetrically arranged on both sides of the second extension 31. A second groove 312 is provided on the outer surface of the middle part of the third rotating block 311. The cross-section of the second groove 312 is triangular. Multiple triangular stop teeth 313 are evenly arranged inside the second groove 312. Simultaneously, a cylindrical sixth fixing block 314 is provided inside the second groove 312. Cylindrical fourth rotating blocks 315 are also symmetrically arranged on both sides of the second extension 31. The diameter of the fourth rotating block 315 matches the diameter of the fourth opening 110. The fourth rotating block 315 can be placed inside the fourth opening 110 and rotate. The transmission... Part 32 is made of elastic material. The cross-section of the transmission part 32 is triangular, meshing with the first groove 303 and the second groove 312. Both ends of the transmission part 32 are wound and connected within the first groove 303 and the second groove 312. A sixth opening 320 and a seventh opening 321 are provided at both ends of the transmission part 32. The sixth opening 320 is hinged to the fourth fixing block 304, and the seventh opening 321 is hinged to the sixth fixing block 314. Multiple eighth openings 322 are evenly provided at one end of the transmission part 32 wound around the second groove 312. The eighth openings 322 mesh with the stop teeth 313, so that when the transmission part 32 rotates, it can drive the second extension part 31 to rotate.

[0025] like Figure 1 As shown, an acetabular cup prosthesis includes an acetabular cup 1 and an inner liner 2. The inner liner 2 is disposed inside the acetabular cup 1. The third fixing block 301 and the fifth fixing block 310 are symmetrically disposed inside the acetabular cup 1 and can extend out from the acetabular cup 1.

[0026] like Figure 2 As shown, a cross-sectional view of an acetabular cup prosthesis is provided. The lower half of the side of the acetabular cup 1 is symmetrically provided with two first openings 10. Circular second openings 100 are symmetrically provided on both sides inside the first openings 10. The upper half of the side of the acetabular cup 1 is symmetrically provided with two third openings 11. Circular fourth openings 110 are symmetrically provided on both sides inside the third openings 11. A fifth opening 12 is symmetrically provided on the top of the inner surface of the acetabular cup 1. The fifth opening 12 consists of a spherical receiving hole and a triangular receiving hole, with its bottom extending to the inner surface of the acetabular cup 1. A first arc-shaped recess 13 is symmetrically provided on the outer side of the side of the acetabular cup 1. An inner liner 2 is disposed inside the acetabular cup 1. The inner liner 2 has serrations symmetrically provided on its side. The top outer surface of the inner liner 2... A symmetrically arranged arc-shaped second recess 21 is provided, and a first fixing block 22 is hingedly connected to the second recess 21. The head of the first fixing block 22 is provided with a second fixing block 220 in the shape of a sphere, and the bottom of the first fixing block 22 is connected to a first spring 221. The first fixing block 22 and the second fixing block 220 can be compressed into the second recess 21. At the same time, the first fixing block 22 and the second fixing block 220 can be pushed into the fifth opening 12 in the acetabular cup 1. After being pushed in, the second fixing block 220 can be locked into the spherical receiving hole of the fifth opening 12 for limiting. The first extension 30 is provided in the first opening 10, and the outer surface of the first extension 30 is provided with ratchet teeth 300. The ratchet teeth 300 and the serrations 20 on the inner liner gasket 2 are connected. The first extension portion 30 is provided with an arc-shaped third fixing block 301, which can extend out from the arc-shaped opening of the first opening 10. The second extension portion 31 is disc-shaped and is disposed in the third opening 11. The second extension portion 31 is connected to an arc-shaped fifth fixing block 310, which can extend out from the arc-shaped opening of the third opening 11.

[0027] like Figure 3As shown in the cross-sectional view of the acetabular cup 1, two first openings 10 are symmetrically arranged on the lower half of the side of the acetabular cup 1. The first opening 10 is a disc-shaped hole connected to an arc-shaped opening extending to the outer surface of the acetabular cup 1. The first opening 10 penetrates to the inner surface of the acetabular cup 1. Circular second openings 100 are symmetrically arranged on both sides inside the first opening 10. Two third openings 11 are symmetrically arranged on the upper half of the side of the acetabular cup 1. The third opening 11 is a disc-shaped hole connected to an arc-shaped opening extending to the outer surface of the acetabular cup 1. Circular fourth openings 110 are symmetrically arranged on both sides inside the third opening 11. A fifth opening 12 is symmetrically arranged on the top of the inner surface of the acetabular cup 1. The fifth opening 12 consists of a spherical receiving hole and a triangular receiving hole, and its bottom penetrates to the inner surface of the acetabular cup 1. An arc-shaped first recess 13 is symmetrically arranged on the outer side of the acetabular cup 1, and the first recess 13 is located between the first opening 10 and the third opening 11.

[0028] like Figure 4 As shown in the cross-sectional view of the inner lining gasket 2, the outer surface of the side of the inner lining gasket 2 is symmetrically provided with serrations 20, and the outer surface of the top of the inner lining gasket 2 is symmetrically provided with an arc-shaped second recess 21. A first fixing block 22 is hinged to the second recess 21. The head of the first fixing block 22 is provided with a second fixing block 220 in the shape of a sphere. A first spring 221 is connected to the bottom of the first fixing block 22. The first fixing block 22 and the second fixing block 220 can be compressed and placed into the second recess 21.

[0029] like Figure 5 As shown, the extension portion includes a first extension portion 30, a second extension portion 31, and a transmission portion 32. The first extension portion 30 is disc-shaped, and ratchet teeth 300 are evenly distributed on its outer surface. The first extension portion 30 is connected to an arc-shaped third fixing block 301. Cylindrical first rotating blocks 302 are symmetrically arranged on both sides of the first extension portion 30. A first groove 303 is provided on the outer surface of the middle part of the first rotating block 302. The cross-section of the first groove 303 is triangular. Cylindrical second rotating blocks 305 are provided on the first rotating blocks 302 on both sides of the first extension portion 30. The extension part 31 is a disc. The second extension part 31 is connected to an arc-shaped fifth fixing block 310. Cylindrical third rotating blocks 311 are symmetrically arranged on both sides of the second extension part 31. A second groove 312 is provided on the outer surface of the middle part of the third rotating block 311. The cross-section of the second groove 312 is triangular. Cylindrical fourth rotating blocks 315 are correspondingly arranged on the third rotating blocks 311 on both sides of the second extension part 31. The transmission part 32 is arranged between the first extension part 30 and the second extension part 31. The two ends of the transmission part 32 are wound and connected in the first groove 303 and the second groove 312.

[0030] like Figure 6 As shown, the first extension portion 30 is disc-shaped, and ratchet teeth 300 are evenly arranged on the outside of the first extension portion 30. The ratchet teeth 300 of the first extension portion 30 can extend from the first opening 10 to the inner surface of the acetabular cup 1 and engage with the serrations 20 on the inner liner gasket 2. The first extension portion 30 is connected to an arc-shaped third fixing block 301, which can extend from the arc-shaped opening of the first opening 10. Cylindrical first rotating blocks 302 are symmetrically arranged on both sides of the first extension portion 30. A first groove 303 is provided on the outer surface of the middle part of the first rotating block 302. The cross-section of the first groove 303 is triangular. A cylindrical fourth fixing block 304 is provided in the first groove 303. Cylindrical second rotating blocks 305 are provided on the first rotating blocks 302 on both sides of the first extension portion 30.

[0031] like Figure 7 As shown, the second extension portion 31 is disc-shaped, and an arc-shaped fifth fixing block 310 is connected to the second extension portion 31. The fifth fixing block 310 can extend out from the arc-shaped opening of the third opening 11. Cylindrical third rotating blocks 311 are symmetrically arranged on both sides of the second extension portion 31. A second groove 312 is provided on the outer surface of the middle part of the third rotating block 311. The cross-section of the second groove 312 is triangular. Multiple triangular stop teeth 313 are evenly arranged in the second groove 312. At the same time, a cylindrical sixth fixing block 314 is provided in the second groove 312. A cylindrical fourth rotating block 315 is correspondingly arranged on the third rotating blocks 311 on both sides of the second extension portion 31.

[0032] like Figure 8 As shown, the cross-section of the transmission part 32 is a triangle that meshes with the first groove 303 and the second groove 312. The two ends of the transmission part 32 are wound and connected in the first groove 303 and the second groove 312. The two ends of the transmission part 32 are provided with a penetrating sixth opening 320 and a seventh opening 321. The end of the transmission part 32 wound around the second groove 312 is provided with a plurality of eighth openings 322 evenly distributed.

[0033] When using this invention, the specific technical effects brought about by the embodiments are as follows: After the acetabular cup and extension assembly is implanted, the first and second extensions retract into the first recess on the acetabular cup, and the transmission part is wrapped around the first and second grooves. After implantation, the inner liner is pushed into the acetabular cup. During the implantation process, the serrations on the inner liner are aligned with the ratchet of the first extension and pushed in. During the pushing process, the serrations push the ratchet to rotate, thereby driving the first extension to rotate. At this time, the rotation of the first extension causes the third fixing block to extend out from the first opening and enter the medullary cavity. When the first extension rotates, the first rotating block rotates accordingly, and the transmission part wrapped around the first groove of the first rotating block rotates accordingly. After the rotation of the transmission part exceeds the elastic limit of its material, the other end of the third rotating block wrapped around the second extension begins to be pulled. The seventh opening is connected to the sixth fixing block on the second extension, and the eighth opening on the transmission part meshes with the stop tooth. Therefore, when the transmission part is pulled, the transmission part can drive the second extension part to rotate. When the second extension part rotates, it drives the fifth fixing block to rotate and extend out of the third opening on the acetabular cup into the medullary cavity. When the inner liner is continuously pushed into the acetabular cup until the first fixing block enters the fifth opening in the acetabular cup, the second fixing block is first compressed when it hits the inclined surface of the fifth opening, and then it is locked into the spherical opening of the fifth opening to achieve limiting. When the second fixing block is locked in, the first extension part is fully rotated, the third fixing block on the first extension part is fully extended into the medullary cavity, and the transmission part is also fully pulled, realizing the full extension of the second extension part and fully extending the fifth fixing block into the medullary cavity, thus achieving the fixation of the acetabular cup and enhancing the stability of the entire acetabular cup prosthesis.

[0034] In summary, by incorporating an extension component within the acetabular cup, this invention enhances the stability of the acetabular cup within the medullary cavity, thereby achieving overall stability of the acetabular cup prosthesis.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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 prosthesis, characterized in that, include: The acetabular cup (1) has two first openings (10) and two third openings (11) symmetrically arranged on its side. The inner lining gasket (2) has serrations (20) symmetrically arranged on its outer surface. Extension portion (3) is symmetrically arranged inside the acetabular cup (1). The extension portion (3) includes a first extension portion (30), a second extension portion (31) and a transmission portion (32). The first extension portion (30) is uniformly provided with ratchet teeth (300) on its outside. The ratchet teeth (300) mesh with the saw teeth (20). The transmission portion (32) is connected between the first extension portion (30) and the second extension portion (31).

2. The acetabular cup prosthesis according to claim 1, characterized in that, The first opening (10) on the acetabular cup (1) is a disc-shaped hole connected to an arc-shaped opening extending to the outer surface of the acetabular cup (1). The first opening (10) penetrates to the inner surface of the acetabular cup (1). Circular second openings (100) are symmetrically arranged on both sides inside the first opening (10). The third opening (11) is a disc-shaped hole connected to an arc-shaped opening extending to the outer surface of the acetabular cup (1). Circular fourth openings (110) are symmetrically arranged on both sides inside the third opening (11). A fifth opening (12) is symmetrically arranged on the inner surface of the top of the acetabular cup (1). The fifth opening (12) is composed of a spherical receiving hole and a triangular receiving hole, and its bottom penetrates to the inner surface of the acetabular cup (1). Arc-shaped first recesses (13) are symmetrically arranged on both outer surfaces of the acetabular cup (1). The first recesses (13) are located between the first opening (10) and the third opening (11).

3. The acetabular cup prosthesis according to claim 2, characterized in that, The inner liner gasket (2) has a symmetrical arc-shaped second recess (21) on its top outer surface. A first fixing block (22) is connected to the second recess (21) via a hinge. The head of the first fixing block (22) has a second fixing block (220) in the shape of a sphere. The bottom of the first fixing block (22) is connected to a first spring (221). The first fixing block (22) and the second fixing block (220) can be pushed into the fifth opening (12) in the acetabular cup (1) for positioning.

4. The acetabular cup prosthesis according to claim 2, characterized in that, Cylindrical second rotating blocks (305) are symmetrically arranged on both sides of the first extension (30). The second rotating blocks (305) are placed in the second opening (100) and can rotate. Cylindrical fourth rotating blocks (315) are symmetrically arranged on both sides of the second extension (31). The fourth rotating blocks (315) are placed in the fourth opening (110) and can rotate.

5. The acetabular cup prosthesis according to claim 1, characterized in that, The first extension (30) is disposed in the first opening (10) and can rotate. The ratchet (300) of the first extension (30) can extend from the first opening (10) to the inner surface of the acetabular cup (1) and engage with the serration (20) on the inner liner gasket (2). The second extension (31) is disposed in the third opening (11) and can rotate. The first extension (30) is connected to an arc-shaped third fixing block (301), and the second extension (31) is connected to an arc-shaped fifth fixing block (310).

6. The acetabular cup prosthesis according to claim 1, characterized in that, Cylindrical first rotating blocks (302) are symmetrically arranged on both sides of the first extension (30), and a first groove (303) is provided on the outer surface of the middle part of the first rotating block (302), and the cross section of the first groove (303) is triangular; cylindrical third rotating blocks (311) are symmetrically arranged on both sides of the second extension (31), and a second groove (312) is provided on the outer surface of the middle part of the third rotating block (311), and the cross section of the second groove (312) is triangular.

7. The acetabular cup prosthesis according to claim 6, characterized in that, The first groove (303) is provided with a cylindrical fourth fixing block (304), the second groove (312) is provided with a plurality of triangular stop teeth (313) evenly arranged, and the second groove (312) is provided with a cylindrical sixth fixing block (314).

8. The acetabular cup prosthesis according to claim 7, characterized in that, The transmission part (32) is made of elastic material. The cross section of the transmission part (32) is a triangle that meshes with the first groove (303) and the second groove (312). The two ends of the transmission part (32) are wound and connected in the first groove (303) and the second groove (312). The two ends of the transmission part (32) are provided with a penetrating sixth opening (320) and a seventh opening (321). The sixth opening (320) is hinged to the fourth fixing block (304), and the seventh opening (321) is hinged to the sixth fixing block (314). The transmission part (32) is wound around the second groove (312) and a plurality of eighth openings (322) are evenly provided. The eighth openings (322) mesh with the stop teeth (313).

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