CN117137687B

CN117137687B - Acetabular cup assembly

Info

Publication number: CN117137687B
Application number: CN202311416834.6A
Authority: CN
Inventors: 黄朝阳
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2024-03-15
Anticipated expiration: 2043-10-30
Also published as: CN117137687A

Abstract

The present invention provides an acetabular cup assembly comprising: the acetabular cup is internally provided with a liquid storage container, a liquid storage cavity is formed in the liquid storage container, and the liquid storage container is provided with a liquid outlet communicated with the liquid storage cavity; the inner liner is floatably nested in the acetabular cup, and the inner wall of the inner liner is in contact fit with the ball head; the plugging piece is arranged on the outer wall of the lining, is inserted into the liquid storage cavity and plugged at the liquid outlet, a first liquid outlet channel is arranged in the plugging piece, and a second liquid outlet channel communicated with the first liquid outlet channel and the inner space of the lining is arranged in the lining; the lining has a liquid outlet position for communicating the inlet of the first liquid outlet channel with the liquid storage cavity and a liquid stopping position for sealing and matching the side wall of the first liquid outlet channel with the side wall of the liquid outlet when floating. The technical scheme of the application effectively solves the problem that heavy abrasion is generated between the ball head and the lining in the related technology.

Description

Acetabular cup assembly

Technical Field

The invention relates to the field of medical instruments, in particular to an acetabular cup assembly.

Background

Hip joint prostheses implanted in hip joint surgery generally comprise an acetabular cup, a liner, a ball head and a femoral stem, the ball head being located at the neck of the femoral stem and mounted in the liner, the liner being mounted in the acetabular cup.

When a person moves, the ball head transmits a larger load to the inner lining, so that the ball head is in close contact with the inner lining, and after the person moves for a long time, lubricating liquid is lacking between the ball head and the inner lining, so that abrasion between the ball head and the inner lining is aggravated, ion precipitation occurs, and the safety is influenced.

Disclosure of Invention

The main object of the present invention is to provide an acetabular cup assembly to solve the problem of heavy wear between the ball head and the liner in the related art.

To achieve the above object, the present invention provides an acetabular cup assembly comprising: the acetabular cup is internally provided with a liquid storage container, a liquid storage cavity is formed in the liquid storage container, and the liquid storage container is provided with a liquid outlet communicated with the liquid storage cavity; the inner liner is floatably nested in the acetabular cup, and the inner wall of the inner liner is in contact fit with the ball head; the plugging piece is arranged on the outer wall of the lining, is inserted into the liquid storage cavity and plugged at the liquid outlet, a first liquid outlet channel is arranged in the plugging piece, and a second liquid outlet channel communicated with the first liquid outlet channel and the inner space of the lining is arranged in the lining; the lining has a liquid outlet position for communicating the inlet of the first liquid outlet channel with the liquid storage cavity and a liquid stopping position for sealing and matching the side wall of the first liquid outlet channel with the side wall of the liquid outlet when floating.

Further, the plugging piece comprises a convex column arranged on the outer wall of the lining and a convex block connected with the convex column, the first liquid outlet channel is arranged in the convex column, the convex column is inserted into the liquid outlet, and the convex block is positioned in the liquid storage cavity and can be matched with the edge stop of the liquid outlet.

Further, the inlet of the first liquid outlet channel is arranged on the side wall of the convex column, a first conical surface is arranged on the side wall of the convex column, a second conical surface matched with the first conical surface in a sealing mode is arranged on the side wall of the liquid outlet, and the conical degree of the first conical surface is equal to that of the second conical surface.

Further, a first resilient member is disposed between the liner and the acetabular cup.

Further, the liner comprises a liner body nested in the acetabular cup and a first ring body surrounding the outer side of the liner body, and the first elastic piece is abutted between the first ring body and the acetabular cup.

Further, the acetabular cup comprises an acetabular cup body and a second ring body movably arranged on the acetabular cup body, the liner body is positioned in the acetabular cup body and the second ring body, the first ring body is positioned between the second ring body and the end face of the acetabular cup body, and the first elastic piece is abutted between the first ring body and the end face of the acetabular cup body.

Further, a clamping structure is arranged between the second ring body and the acetabular cup body, the clamping structure comprises a clamping hook and a clamping groove matched with the clamping hook in a clamping manner, one of the clamping hook and the clamping groove is arranged on the second ring body, and the other clamping hook and the clamping groove is arranged on the acetabular cup body; the clamping groove comprises a first groove section matched with the hook body of the hook and a second groove section matched with the hook head of the hook, the second groove section and the first groove section form an included angle, the volume of the second groove section is larger than that of the hook head, and the second groove section can limit the moving range of the hook head when the lining floats.

Further, a notch capable of accommodating the hook head is formed in the hook body, the groove wall of the second groove section comprises two stop structures which are symmetrically arranged, each stop structure comprises a first stop surface and a second stop surface which are arranged at an acute angle, and the first stop surface is located on one side, away from the second ring body, of the second stop surface; the hook head comprises two wedges arranged in opposite directions and a second elastic piece connected between the two wedges, and two first ends of the two wedges are connected with one end of the hook body, which is far away from the second ring body; the two second ends of the two wedge blocks are provided with a furling position which is close to each other to be positioned in the opening and a unfolding position which is far away from each other to be positioned outside the opening, when the two second ends are positioned at the furling position, the second elastic piece is compressed, and when the second elastic piece is stretched, the two second ends are matched with the two first stop surfaces in a stop mode to be positioned at the unfolding position; when the two second ends move from the position of being in stop fit with the two first stop surfaces to the position of being in stop fit with the two second stop surfaces, the lining is in the liquid stop position.

Further, the shank of the hook penetrates through the first ring body to be matched with the clamping groove in a clamping mode, a through hole for the shank to penetrate through is formed in the first ring body, a first rotation stopping surface is arranged on the shank, and a second rotation stopping surface matched with the first rotation stopping surface in a rotation stopping mode is arranged on the hole wall of the through hole.

Further, a rotation stopping structure is arranged between the first ring body and the acetabular cup, the rotation stopping structure comprises a rotation stopping block and a rotation stopping notch matched with the rotation stopping block in a rotation stopping mode, one of the rotation stopping block and the rotation stopping notch is arranged on the first ring body, the other of the rotation stopping block and the rotation stopping notch is arranged on the acetabular cup, one end of the first elastic piece is fixed on the rotation stopping notch, and the other end of the first elastic piece is abutted to the rotation stopping block.

Further, the opening of the liner is provided with a spigot, and the acetabular cup assembly further comprises a sealing ring arranged at the spigot, wherein the sealing ring seals a gap between the liner and the ball head.

By applying the technical scheme of the invention, the acetabular cup component comprises: acetabular cup, liner and plug. A liquid storage container is arranged in the acetabular cup, a liquid storage cavity is arranged in the liquid storage container, and a liquid outlet communicated with the liquid storage cavity is arranged in the liquid storage container. The liquid storage cavity is used for storing lubricating liquid. The inner liner is floatably nested in the acetabular cup, and the inner wall of the inner liner is in contact fit with the ball head. The plugging piece sets up on the outer wall of inside lining, and the plugging piece inserts in the stock solution cavity and shutoff in the liquid outlet. In this way, during implantation of the acetabular cup assembly into the acetabular fossa of a patient, lubrication fluid within the reservoir is prevented from leaking out of the fluid outlet. A first liquid outlet channel is arranged in the plugging piece, and a second liquid outlet channel communicated with the first liquid outlet channel and the inner space of the lining is arranged in the lining. The lining has a liquid outlet position for communicating the inlet of the first liquid outlet channel with the liquid storage cavity and a liquid stopping position for sealing and matching the side wall of the first liquid outlet channel with the side wall of the liquid outlet when floating. When the patient is in walking state, the inside lining can receive the pressure that the bulb applyed, the inside lining can laminate in the acetabular cup, the inside lining is in the play liquid position this moment, the interior lubrication fluid of stock solution container flows into first drain channel by first drain channel's import in, flow into second drain channel after first drain channel, flow into the inner space of inside lining by the export of second drain channel this moment, lubrication fluid can get into between inside lining and the bulb to increase the lubricity between inside lining and the bulb, with the alleviateed wearing and tearing, can reduce the possibility that has the ion to separate out. Therefore, the technical scheme of the application can solve the problem that heavy abrasion is generated between the ball head and the lining in the related technology. When the patient is in a lying state, the inner lining is not subjected to the pressure exerted by the ball head, the inner lining is in a liquid stopping position, the lubricating liquid in the liquid storage container is prevented from flowing into the inlet of the first liquid outlet channel, and the leakage of the lubricating liquid is avoided. In addition, in the process of implanting the acetabular cup component into the acetabular fossa of a patient, as the lining is not subjected to pressure, the lining is kept at a liquid stopping position, and lubricating liquid in the liquid storage container can be prevented from flowing into the inlet of the first liquid outlet channel, so that the leakage of the lubricating liquid is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 illustrates a schematic perspective view of an embodiment of an acetabular cup assembly according to the invention;

FIG. 2 illustrates an exploded view of the acetabular cup assembly of FIG. 1;

FIG. 3 shows an enlarged schematic view of the acetabular cup assembly A of FIG. 2;

FIG. 4 illustrates a schematic cross-sectional view of a reservoir of the acetabular cup assembly of FIG. 2;

FIG. 5 illustrates a schematic front view of the acetabular cup assembly of FIG. 1;

FIG. 6 shows an enlarged schematic view at B of the liner of the acetabular cup assembly of FIG. 5 in an out-of-liquid position;

FIG. 7 illustrates an enlarged schematic view of the liner of the acetabular cup assembly of FIG. 5 in a liquid stop position at B;

FIG. 8 illustrates a schematic cross-sectional view of the acetabular cup assembly of FIG. 1;

FIG. 9 illustrates an enlarged schematic view of the liner of the acetabular cup assembly of FIG. 8 at C in an out-of-liquid position;

FIG. 10 illustrates an enlarged schematic view of the liner of the acetabular cup assembly of FIG. 8 in a liquid stop position at C;

FIG. 11 illustrates an enlarged schematic view of the liner of the acetabular cup assembly of FIG. 8 at D in the liquid out position;

FIG. 12 illustrates an enlarged schematic view of the liner of the acetabular cup assembly of FIG. 8 at D in a liquid stop position.

Wherein the above figures include the following reference numerals:

10. an acetabular cup; 11. an acetabular cup body; 12. a second ring body;

20. a liquid storage container; 21. a liquid storage cavity; 22. a liquid outlet; 23. a second conical surface;

30. a lining; 31. a liner body; 32. a first ring body; 33. a second liquid outlet channel; 34. a via hole; 35. a second rotation stopping surface; 36. a spigot;

40. a blocking member; 41. a convex column; 42. a bump; 43. a first conical surface; 44. a first liquid outlet channel;

51. a first elastic member; 52. a seal ring;

60. a clamping structure; 61. a clamping hook; 611. a hook body; 612. a first rotation stopping surface; 613. a hook head; 614. wedge blocks; 6141. a first end; 6142. a second end; 615. a second elastic member; 616. a notch; 62. a clamping groove; 621. a first trough section; 622. a second trough section; 623. a first stop surface; 624. a second stop surface;

70. a rotation stopping structure; 71. a rotation stop block; 72. and a rotation stopping notch.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 12, the acetabular cup assembly of the present embodiment includes: acetabular cup 10, liner 30 and closure 40. The acetabular cup 10 is internally provided with a liquid storage container 20, the liquid storage container 20 is internally provided with a liquid storage cavity 21, and the liquid storage container 20 is provided with a liquid outlet 22 communicated with the liquid storage cavity 21. The liner 30 is floatably nested within the acetabular cup 10, and an inner wall of the liner 30 is in contact engagement with a ball head (not shown). The plugging member 40 is disposed on the outer wall of the liner 30, the plugging member 40 is inserted into the liquid storage cavity 21 and plugged into the liquid outlet 22, a first liquid outlet channel is disposed in the plugging member 40, and a second liquid outlet channel 33 communicating with the first liquid outlet channel and the inner space of the liner 30 is disposed in the liner 30. The liner 30 has a liquid outlet position for communicating the inlet of the first liquid outlet channel with the liquid storage cavity 21 and a liquid stopping position for sealing and matching the first liquid outlet channel with the side wall of the liquid outlet 22 when floating.

With the technical solution of the present embodiment, the liquid storage cavity 21 is used for storing the lubricating liquid. The blocking member 40 is inserted into the liquid storage cavity 21 and blocked off from the liquid outlet 22. This prevents the lubrication fluid within the reservoir 20 from leaking out of the fluid outlet 22 during implantation of the acetabular cup assembly into the patient's acetabular fossa. A first liquid outlet passage is provided in the blocking member 40, and a second liquid outlet passage 33 is provided in the liner 30, which communicates with the first liquid outlet passage and the inner space of the liner 30. The liner 30 has a liquid outlet position for communicating the inlet of the first liquid outlet channel with the liquid storage cavity 21 and a liquid stopping position for sealing and matching the first liquid outlet channel with the side wall of the liquid outlet 22 when floating. When the patient is in the walking state, the inner liner 30 can receive the pressure exerted by the ball head, the inner liner 30 can be attached in the acetabular cup 10, at this time, the inner liner 30 is in a liquid outlet position, the lubricating liquid in the liquid storage container 20 flows into the first liquid outlet channel from the inlet of the first liquid outlet channel, flows into the second liquid outlet channel 33 after passing through the first liquid outlet channel, flows into the inner space of the inner liner 30 from the outlet of the second liquid outlet channel 33, at this time, the lubricating liquid can enter between the inner liner 30 and the ball head, so that the lubricity between the inner liner 30 and the ball head is increased, the abrasion is reduced, and the possibility of ion precipitation is reduced. Therefore, the technical solution of the present embodiment can solve the problem of heavy wear generated between the ball head and the liner 30 in the related art. When the patient is in the lying state, the inner liner 30 is not subjected to the pressure exerted by the ball head, the inner liner 30 is in the liquid stopping position, the lubricating liquid in the liquid storage container 20 is prevented from flowing into the inlet of the first liquid outlet channel, and leakage of the lubricating liquid is avoided. And in the process of implanting the acetabular cup assembly into the acetabular fossa of the patient, since the liner 30 is not pressurized, the liner 30 remains in the fluid-stop position, and lubrication fluid in the reservoir 20 is prevented from flowing into the inlet of the first fluid outlet channel, thereby avoiding leakage of the lubrication fluid.

In this embodiment, the liquid storage container 20 is a liquid outlet tank, and a containing cavity for containing the liquid outlet tank is arranged in the acetabular cup 10, and the liquid outlet tank is bonded, clamped or screwed in the containing cavity.

As shown in fig. 1 to 12, the blocking member 40 includes a boss 41 provided on the outer wall of the liner 30 and a bump 42 connected to the boss 41. The first liquid outlet channel is arranged in the convex column 41, and the convex column 41 is inserted into the liquid outlet 22. The cylindrical structure of the stud 41 facilitates on the one hand the blocking of the liquid outlet 22 and on the other hand the provision of a first liquid outlet channel in the stud 41. The projection 42 is positioned within the liquid storage cavity 21 and is capable of cooperating with the rim stop of the liquid outlet 22, such that the projection 42 is prevented from falling out of the liquid storage cavity 21 when the projection 42 cooperates with the rim stop of the liquid outlet 22, and further, the liner 30 is prevented from falling out of the acetabular cup 10 when the liner 30 floats.

In this embodiment, the liner 30 and the boss 41 are formed as a single piece. The protrusion 42 is made of an elastic material, when the protrusion 42 passes through the liquid outlet 22 from outside the liquid storage container 20 during installation, the protrusion 42 has elasticity and can be deformed, when the protrusion 42 passes through the liquid outlet 22, the sidewall of the liquid outlet 22 presses the protrusion 42, so that the protrusion 42 is installed into the liquid storage cavity 21 after being deformed, and the protrusion 41 and the protrusion 42 are preferably in interference connection. Of course, in the embodiment not shown in the drawings, the integral structure of the liner and the boss may be a separate structure.

As shown in fig. 1 to 12, the inlet of the first liquid outlet channel is disposed on the side wall of the convex column 41, a first conical surface 43 is disposed on the side wall of the convex column 41, a second conical surface 23 in sealing fit with the first conical surface 43 is disposed on the side wall of the liquid outlet 22, and the taper of the first conical surface 43 is equal to that of the second conical surface 23. In this way, when the lining 30 is switched between the liquid outlet position and the liquid stop position, the first conical surface 43 and the second conical surface 23 keep a sealing fit state, so that the blocking piece 40 effectively blocks the liquid outlet 22, and the lubricating liquid in the liquid storage container 20 is prevented from leaking from the liquid outlet 22. And at the same time, the inlet of the first liquid outlet channel can be sealed, so that lubricating liquid in the liquid storage container 20 is prevented from leaking from the first liquid outlet channel.

As shown in fig. 1-12, to enable the liner 30 to float within the acetabular cup 10, a first resilient member 51 is provided between the liner 30 and the acetabular cup 10. When the patient is walking, the liner 30 is subjected to the pressure exerted by the ball head, and the liner 30 compresses the first elastic member 51 to fit the liner 30 within the acetabular cup 10. When the patient is in the recumbent state, the first resilient member 51 urges the liner 30 to distract the liner 30 and acetabular body. The first elastic member 51 is preferably a first compression spring or a first elastic body.

As shown in fig. 1 to 12, in order to enable the liner 30 to float smoothly in the acetabular cup 10, the liner 30 includes a liner body 31 nested within the acetabular cup 10 and a first ring body 32 surrounding an outer side of the liner body 31, and the first elastic member 51 abuts between the first ring body 32 and the acetabular cup 10.

As shown in fig. 1 to 12, the acetabular cup 10 includes an acetabular cup body 11 and a second ring body 12 movably disposed on the acetabular cup body 11, a liner body 31 is disposed in the acetabular cup body 11 and the second ring body 12, a first ring body 32 is disposed between the second ring body 12 and an end face of the acetabular cup body 11, and a first elastic member 51 is abutted between the first ring body 32 and the end face of the acetabular cup body 11. Thus, when the liner 30 floats in the acetabular cup 10, the second ring 12 can block the first ring 32 in a direction in which the first ring 32 is away from the acetabular cup body 11, thereby reducing the range of swinging of the liner 30 about the centerline of the liquid outlet 22 and effectively reducing deflection of the liner 30 relative to the acetabular cup 10.

As shown in fig. 1 to 12, in order to enable the liner 30 and the acetabular cup 10 to be floatably connected, a clamping structure 60 is disposed between the second ring body 12 and the acetabular cup body 11, the clamping structure 60 includes a clamping hook 61 and a clamping groove 62 in clamping engagement with the clamping hook 61, the clamping hook 61 is disposed on the second ring body 12, and the clamping groove 62 is disposed on the acetabular cup body 11. The clamping groove 62 includes a first groove section 621 matching with the shank 611 of the clamping hook 61 and a second groove section 622 matching with the shank 613 of the clamping hook 61, the second groove section 622 and the first groove section 621 form an included angle, the volume of the second groove section 622 is larger than that of the shank 613, and when the liner 30 floats, the second groove section 622 can limit the moving range of the shank 613. In this way, the first ring 32 can be limited to push the second ring 12 relative to the movement range of the acetabular cup body 11, so as to limit the first ring 32 to float between the second ring 12 and the end surface of the acetabular cup body 11, ensure the stability of the liner 30 floating in the acetabular cup 10, and prevent the liner 30 from falling from the acetabular cup 10.

Of course, in an embodiment not shown in the figures, the catch is provided on the second ring body and the catch is provided on the acetabular cup body.

As shown in fig. 1 to 12, the hook body 611 is provided with a notch 616 capable of accommodating the hook head 613, and the groove wall of the second groove section 622 includes two symmetrical stop structures, each of which includes a first stop surface 623 and a second stop surface 624 disposed at an acute angle, and the first stop surface 623 is located on a side of the second stop surface 624 away from the second ring body 12. The hook head 613 comprises two wedges 614 arranged oppositely, and a second elastic piece 615 connected between the two wedges 614, wherein two first ends 6141 of the two wedges 614 are connected with one end of the hook body 611 away from the second ring body 12; the two second ends 6142 of the wedges 614 have a collapsed position adjacent to each other within the gap 616 and an expanded position spaced apart from each other outside the gap 616.

It should be noted that the fact that the volume of the second groove section 622 is larger than the volume of the hook head 613 means that in the process of switching the two second ends 6142 of the two wedges 614 from the folded position to the unfolded position, the volume of the second groove section 622 is much larger than the volume of the hook head 613, so as to meet the requirement that the two second ends 6142 can be switched from the folded position to the unfolded position.

In the present embodiment, during the process of inserting the hook head 613 of the hook 61 into the second slot segment 622, the side wall of the first slot segment 621 presses the two second ends 6142, and the second elastic member 615 is compressed when the two second ends 6142 are in the folded position, at this time, the hook head 613 is smoothly inserted into the second slot segment 622 through the first slot segment 621. In the second groove section 622, since when the volume of the second groove section 622 is greater than the volume of the hook head 613, the second elastic piece 615 is elongated, the two second ends 6142 are in stop fit with the two first stop surfaces 623 to be in the unfolded position; during the floating of the liner 30, the two second ends 6142 remain in the deployed position due to the stop engagement of the two second ends 6142 with the two first stop surfaces 623. When the two second ends 6142 move from the position of stop engagement with the two first stop surfaces 623 to the position of stop engagement with the two second stop surfaces 624, the liner 30 is in the liquid-stop position. At this time, under the action of the first elastic member 51, the liner 30 can be kept at the stop position, so that the blocking member 40 can effectively block the inlets of the liquid outlet 22 and the first liquid outlet channel to prevent the lubrication liquid in the liquid storage container 20 from leaking out of the liquid outlet 22 and the first liquid outlet channel, both in the process of implanting the acetabular cup assembly into the acetabular fossa of the patient and when the patient is in the lying state. The second elastic member 615 is preferably a second compression spring or a second elastic body.

As shown in fig. 1 to 12, when the hook 61 is disposed on the second ring body 12, the catch groove 62 is disposed on the acetabular cup body 11. The hook body 611 of the hook 61 passes through the first ring body 32 to be in clamping fit with the clamping groove 62, the first ring body 32 is provided with a through hole 34 for the hook body 611 to pass through, the hook body 611 is provided with a first rotation stopping surface 612, and the hole wall of the through hole 34 is provided with a second rotation stopping surface 35 in rotation stopping fit with the first rotation stopping surface 612. In this way, when the liner 30 floats, the first ring body 32 pushes the second ring body 12 to move relative to the acetabular cup body 11, and the first rotation stop surface 612 and the second rotation stop surface 35 are in rotation stop engagement, so that the hook body 611 can be prevented from rotating relative to the first ring body 32, and further the second ring body 12 connected to the hook 61 can be prevented from rotating relative to the first ring body 32. And when the first ring body 32 pushes the second ring body 12 to move relative to the acetabular cup body 11, the hook body 611 is matched with the through hole 34 and the first rotation stopping surface 612 and the second rotation stopping surface 35 are matched in a rotation stopping manner, so that synchronous movement of the first ring body 32 and the second ring body 12 can be guided, and deflection in the moving process can be prevented.

Of course, in the embodiment not shown in the figures, when the clamping groove is arranged on the second ring body and the clamping hook is arranged on the acetabular cup body, the hook body is prevented from rotating relative to the first ring body, and further the acetabular cup body connected with the clamping hook can be prevented from rotating relative to the first ring body.

As shown in fig. 1 to 10, in order to prevent torsion between the first ring body 32 and the acetabular cup 10 when the liner 30 floats, a rotation stopping structure 70 is provided between the first ring body 32 and the acetabular cup 10, and the rotation stopping structure 70 includes a rotation stopping block 71 and a rotation stopping notch 72 in rotation stopping engagement with the rotation stopping block 71. The anti-rotation block 71 is arranged on the first ring body 32, the anti-rotation notch 72 is arranged on the acetabular cup 10, one end of the first elastic piece 51 is fixed on the anti-rotation notch 72, and the other end of the first elastic piece 51 is abutted against the anti-rotation block 71, so that the floating stability of the liner 30 can be effectively ensured.

Of course, in embodiments not shown in the figures, the anti-rotation notch is provided on the first ring body and the anti-rotation block is provided on the acetabular cup.

In order to further ensure the floating stability of the liner 30, the above-mentioned fastening structure 60, the anti-rotation structure 70 and the first elastic member 51 are all four spaced apart. Of course, in the embodiment not shown in the drawings, it may be not limited to four, but may be one, two, three, five or more.

As shown in fig. 1 to 8, the opening of the liner 30 is provided with a spigot 36, and the acetabular cup assembly further comprises a sealing ring 52 arranged at the spigot 36, and after the ball head is implanted in the liner 30, the sealing ring 52 seals a gap between the liner 30 and the ball head, so that lubricating fluid between the liner 30 and the ball head cannot flow out from the gap between the liner 30 and the ball head, and the lubricating property between the liner 30 and the ball head is effectively increased.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An acetabular cup assembly, comprising:

the acetabular cup comprises an acetabular cup body (10), wherein a liquid storage container (20) is arranged in the acetabular cup body (10), a liquid storage cavity (21) is formed in the liquid storage container (20), and the liquid storage container (20) is provided with a liquid outlet (22) communicated with the liquid storage cavity (21);

the inner liner (30) is embedded in the acetabular cup (10) in a floating manner, the inner wall of the inner liner (30) is in contact fit with the ball head, and the inner liner (30) comprises an inner liner body (31) embedded in the acetabular cup (10) and a first ring body (32) arranged on the outer side of the inner liner body (31) in a surrounding manner;

the plugging piece (40) is arranged on the outer wall of the lining (30), the plugging piece (40) is inserted into the liquid storage cavity (21) and plugged into the liquid outlet (22), a first liquid outlet channel is arranged in the plugging piece (40), and a second liquid outlet channel (33) communicated with the first liquid outlet channel and the inner space of the lining (30) is arranged in the lining (30);

a first elastic member (51) disposed between the liner (30) and the acetabular cup (10), the first elastic member (51) abutting between the first ring body (32) and the acetabular cup (10);

the lining (30) is provided with a liquid outlet position for enabling an inlet of the first liquid outlet channel to be communicated with the liquid storage cavity (21) and a liquid stopping position for enabling the first liquid outlet channel to be in sealing fit with the side wall of the liquid outlet (22) when floating.

2. The acetabular cup assembly of claim 1, wherein the plug (40) includes a boss (41) disposed on an outer wall of the liner (30) and a tab (42) coupled to the boss (41), the first fluid outlet channel is disposed within the boss (41), the boss (41) is inserted into the fluid outlet (22), and the tab (42) is disposed within the fluid storage cavity (21) and is engageable with a rim stop of the fluid outlet (22).

3. The acetabular cup assembly of claim 2, wherein the inlet of the first liquid outlet channel is disposed on a sidewall of the boss (41), a first conical surface (43) is disposed on the sidewall of the boss (41), a second conical surface (23) in sealing engagement with the first conical surface (43) is disposed on the sidewall of the liquid outlet (22), and a taper of the first conical surface (43) is equal to a taper of the second conical surface (23).

4. The acetabular cup assembly of claim 1, wherein the acetabular cup (10) includes an acetabular cup body (11) and a second ring body (12) movably disposed on the acetabular cup body (11), the liner body (31) is located within the acetabular cup body (11) and the second ring body (12), the first ring body (32) is located between the second ring body (12) and an end face of the acetabular cup body (11), and the first elastic member (51) is abutted between the first ring body (32) and an end face of the acetabular cup body (11).

5. The acetabular cup assembly of claim 4 wherein,

a clamping structure (60) is arranged between the second ring body (12) and the acetabular cup body (11), the clamping structure (60) comprises a clamping hook (61) and a clamping groove (62) which is matched with the clamping hook (61) in a clamping manner, one of the clamping hook (61) and the clamping groove (62) is arranged on the second ring body (12), and the other is arranged on the acetabular cup body (11);

the clamping groove (62) comprises a first groove section (621) matched with a hook body (611) of the clamping hook (61) and a second groove section (622) matched with a hook head (613) of the clamping hook (61), the second groove section (622) and the first groove section (621) form an included angle, the volume of the second groove section (622) is larger than that of the hook head (613), and when the liner (30) floats, the second groove section (622) can limit the moving range of the hook head (613).

6. The acetabular cup assembly of claim 5 wherein,

the hook body (611) is provided with a notch (616) capable of accommodating the hook head (613), the groove wall of the second groove section (622) comprises two stop structures which are symmetrically arranged, each stop structure comprises a first stop surface (623) and a second stop surface (624) which are arranged at an acute angle, and the first stop surface (623) is positioned on one side of the second stop surface (624) away from the second ring body (12);

the hook head (613) comprises two wedges (614) which are arranged in opposite directions and a second elastic piece (615) connected between the two wedges (614), and two first ends (6141) of the two wedges (614) are connected with one end of the hook body (611) far away from the second ring body (12);

the two second ends (6142) of the wedge blocks (614) are provided with a folded position which is close to each other and is positioned in the gap (616) and an unfolded position which is far away from each other and is positioned outside the gap (616), when the two second ends (6142) are positioned in the folded position, the second elastic piece (615) is compressed, and when the second elastic piece (615) is stretched, the two second ends (6142) are in stop fit with the two first stop surfaces (623) to be positioned in the unfolded position;

the liner (30) is in the liquid-stop position when the two second ends (6142) move from a position in which they are in stop engagement with the two first stop surfaces (623) to a position in which they are in stop engagement with the two second stop surfaces (624).

7. The acetabular cup assembly according to claim 5, wherein a shank (611) of the hook (61) passes through the first ring body (32) to be in clamping fit with the clamping groove (62), a through hole (34) for the shank (611) to pass through is formed in the first ring body (32), a first rotation stopping surface (612) is formed in the shank (611), and a second rotation stopping surface (35) in rotation stopping fit with the first rotation stopping surface (612) is formed in a hole wall of the through hole (34).

8. An acetabular cup assembly according to claim 3, wherein a rotation stopping structure (70) is arranged between the first ring body (32) and the acetabular cup (10), the rotation stopping structure (70) comprises a rotation stopping block (71) and a rotation stopping notch (72) matched with the rotation stopping block (71) in a rotation stopping mode, one of the rotation stopping block (71) and the rotation stopping notch (72) is arranged on the first ring body (32), the other rotation stopping notch is arranged on the acetabular cup (10), one end of the first elastic piece (51) is fixed on the rotation stopping notch (72), and the other end of the first elastic piece (51) is abutted to the rotation stopping block (71).

9. The acetabular cup assembly of claim 1, wherein a spigot (36) is provided at an opening of the liner (30), the acetabular cup assembly further comprising a seal ring (52) provided at the spigot (36), the seal ring (52) sealing a gap between the liner (30) and the ball head.