Acetabulum lining clamping installer

Abstract

The utility model relates to an acetabulum lining clamping installer which comprises a clamping piece and a separating piece, the clamping piece comprises a column body and a plurality of clamping jaws extending from the peripheral face of the column body in the radial direction, the column body is provided with a through hole penetrating in the axial direction, each clamping jaw comprises a clamping face matched with the outer surface of an acetabulum lining, and the separating piece is arranged on the clamping face. The acetabulum lining can be clamped and fixed through the clamping faces of the multiple clamping jaws. The separation piece comprises a spherical segment part matched with the inner surface of the acetabulum lining and a rod part extending out of the middle of the spherical segment part in the axial direction; the rod portion of the separating piece is located in the through hole of the column body, the separating piece can move in the axial direction of the column body to enable the acetabular lining to be separated from the clamping piece, and the acetabular lining can be conveniently installed in an acetabular cup.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an acetabulum liner clamping and installing device. Background Art

[0002] The hip joint, consisting of the femoral head and acetabulum, is a typical ball-and-socket joint. When pain, stiffness, or deformation, or even limited mobility, result from hip degeneration, disease, or trauma, and medication or other conservative treatments are ineffective, surgical hip replacement is often performed to restore daily activities.

[0003] Currently, acetabular liners are typically placed manually during total hip surgery. This is not only inconvenient and can easily damage the acetabular liner, but also difficult to control its orientation during surgery, leading to the risk of tilting and improper installation when hammering the acetabular liner into the acetabular cup. Due to the unique shape of the acetabular liner, both its absorption and manipulation are challenging. Using a distraction tool to dissipate and absorb the medial surface can easily cause wear and tear, making the procedure more cumbersome. Utility Model Content

[0004] The utility model aims to provide an acetabulum liner clamping and installing device which is easy to operate.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] An acetabulum liner clamping and installing device, comprising:

[0007] A clamping member, comprising a cylindrical body and a plurality of claws extending radially from an outer peripheral surface of the cylindrical body, wherein the cylindrical body has a through hole extending axially therethrough, and each of the claws comprises a clamping surface that cooperates with an outer surface of the acetabulum liner, and the clamping surfaces of the plurality of claws are capable of clamping and fixing the acetabulum liner;

[0008] A separator, comprising a spherical segment matched with the inner surface of the acetabulum liner and a rod extending axially from the middle portion of the spherical segment;

[0009] The rod portion of the separating piece is located in the through hole of the column, and the separating piece can move along the axial direction of the column to separate the acetabulum liner from the clamping piece.

[0010] In one embodiment, the acetabular liner clamping and installing device further comprises a liner having a hardness lower than that of the acetabular liner, and the liner is fixed to the clamping surface.

[0011] In one embodiment, when the clamping member clamps and fixes the acetabular liner, the liner is located between the clamping surface and the outer surface of the acetabular liner.

[0012] In one embodiment, the liner includes a deformable portion, and when the clamping member clamps and fixes the acetabulum liner, the deformable portion is located between the clamping surface and the outer surface of the acetabulum liner in a compressed state.

[0013] In one embodiment, the deformation portion is a peripheral wall of a groove, which includes an inner wall in contact with the acetabulum liner, an outer wall in contact with the clamping surface, and two connecting walls connecting the inner wall and the outer wall, with a gap between the inner wall and the outer wall.

[0014] In one embodiment, both the inner wall and the outer wall have curvatures, and the curvatures of the inner wall and the outer wall correspond to the curvatures of the acetabulum liner and the clamping surface, respectively.

[0015] In one embodiment, the gasket includes a fixing portion, the clamping member includes a groove matched with the fixing portion, and the fixing portion is located in the groove and fixed.

[0016] In one embodiment, the rod portion of the separation member is fixedly connected to the through hole of the column by threads.

[0017] In one embodiment, the outer diameter of the spherical segment is smaller than the inner diameter of the acetabular liner.

[0018] In one embodiment, the outer surface of the spherical segment is covered with a protective layer having a lower hardness than the acetabular liner, or the spherical segment is made of a material having a lower hardness than the acetabular liner.

[0019] In one embodiment, the clamping member is made of a rigid material.

[0020] The present invention adopts the above technical solution, which has the beneficial effect that the acetabulum liner clamping and installing device provided by the present invention includes a clamping member and a separating member, the acetabulum liner is clamped and fixed by a plurality of claws of the clamping member, and the acetabulum liner can be separated from the clamping member by the axial movement of the separating member, which not only facilitates the positioning of the acetabulum liner in the acetabulum cup during surgery, but also facilitates the separation of the acetabulum liner from the clamping member to complete the installation of the acetabulum liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded view of the acetabular liner clamp installer is shown.

[0022] Figure 2 A schematic diagram of the clamp and the gasket is shown.

[0023] Figure 3 A schematic diagram of the pad is shown.

[0024] Figure 4 A schematic diagram of an acetabular liner is shown. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings to describe in detail the preferred embodiments of the present invention so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0026] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0027] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0028] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0029] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0030] In the following description, in order to clearly demonstrate the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0031] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0032] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] This embodiment provides an acetabular liner clamping and installing device, which is used to clamp and fix the acetabular liner during surgery, and to remove the acetabular liner after the acetabular liner is placed in the acetabular cup, so as to accurately fit the acetabular liner in the acetabular cup. Figure 1-Figure 4 As shown, the acetabular liner clamping and installation device provided in this embodiment includes a clamping member 1 and a separating member 2. The clamping member 1 includes a cylindrical body 10 having a through hole 101 extending axially therethrough. The cylindrical body 10 has a plurality of radially extending claws 11 on its outer circumference. Each claw 11 includes an extension 111 extending radially from the cylindrical body 10 and a clamping portion 112 located at the distal end of the extension 111. The clamping portion 112 is thicker than the extension 111. A clamping surface 113 is formed at the junction of the extension 111 and the clamping portion 112, which matches the top outer surface edge of the acetabular liner. The clamping surfaces 113 of the plurality of claws 11 cooperate to clamp and secure the acetabular liner. In this embodiment, there are three claws 11, which are evenly distributed circumferentially around the cylindrical body 10. However, the embodiment is not limited thereto. The number of claws 11 can be two, four, or more than four.

[0034] See also Figure 4 , Figure 4 The figure shows a structure of an acetabular liner 4, whose top outer edge is conical. Accordingly, the clamping surface 113 in this embodiment is also designed as a conical surface that matches the acetabular liner 4. To ensure the strength of the clamp 1 and prevent the acetabular liner 4 from accidentally falling off during surgery, the clamp 1 is made of a rigid material such as metal or hard plastic, and more preferably, a lightweight plastic or lightweight alloy.

[0035] In this embodiment, in order to prevent the clamping surface 113 from damaging the acetabular liner 4, the acetabular liner clamping and installing device further includes a liner 3. The acetabular liner 4 is usually a ceramic liner, and the liner 3 is made of a material with a lower hardness than the acetabular liner 4, such as a polymer material such as rubber or silicone. The liner 3 can be fixed to the clamping surface 113 by means of adhesive or the like. Or see Figure 1-Figure 3 A groove 114 for fixing the liner 3 is provided at the connection between the extension portion 111 and the clamping portion 112. The liner 3 has a fixing portion 31 matched with the groove 114. The fixing portion 31 is inserted into the groove 114 to fix the liner 3 in the groove 114, thereby realizing a fixed connection between the liner 3 and the clamping member 1.

[0036] See also Figure 3 The liner 3 further includes a connecting portion 32 and a deformable portion 33, with the two ends of the connecting portion 32 connected to the fixing portion 31 and the deformable portion 33, respectively. In this embodiment, the deformable portion 33 is a peripheral wall of an arcuate groove, comprising an inner wall 331 in contact with the acetabular liner 4, an outer wall 332 in contact with the clamping surface 113, and two connecting walls 333 connecting the inner wall 331 and the outer wall 332. A gap is formed between the inner wall 331 and the outer wall 332, and the curvature of the inner wall 331 and the outer wall 332 correspond to the curvature of the acetabular liner 4 and the curvature of the clamping surface 113, respectively. When the clamp 1 clamps and secures the acetabular liner 4, the inner wall 331 fits against the acetabular liner 4 and squeezes the inner wall 331 toward the outer wall 332, narrowing the gap between the inner wall 331 and the outer wall 332. This causes the deformable portion 33 to generate a reaction force on the acetabular liner 4, thereby clamping the acetabular liner 4 more firmly and preventing the acetabular liner 4 from accidentally falling off during surgery. Furthermore, during the process of clamping and securing the acetabular liner 4, the deformable portion 33 of the liner 3 expel some of the air in the groove due to compression and deformation, exerting a negative pressure on the acetabular liner 4, allowing the acetabular liner 4 to be adsorbed and secured to the liner 3, further securing the acetabular liner 4.

[0037] The separator 2 includes a spherical segment 21 configured to mate with the inner surface of the acetabular liner 4, and a rod 22 extending axially from the middle portion of the spherical segment 21. The rod 22 extends into and out of the through-hole 101 of the cylindrical body 10, allowing the separator 2 to move axially along the cylindrical body 10 through the engagement of the rod 22 with the through-hole 101, thereby allowing the acetabular liner 4 to move axially and disengage from the clamp 1, thereby placing the acetabular liner 4 within the acetabular cup and completing the installation of the acetabular liner 4. To prevent the spherical segment 21 from damaging the inner surface of the acetabular liner 4, the outer surface of the spherical segment 21 is covered with a material having a lower hardness than the acetabular liner 4, which is typically a ceramic liner. Therefore, the outer surface of the spherical segment 21 can be covered with a material such as hard rubber or hard plastic, or the entire spherical segment 21 can be made of such materials.

[0038] In this embodiment, the rod portion 22 is fixedly connected to the through hole 101 of the column 10 by threads, that is, an external thread is provided on the rod portion 22, and an internal thread matching the external thread is provided in the through hole 101. When separating, the acetabulum liner 4 can be conveniently separated from the clamping member 1 by rotating the rod portion 22.

[0039] Preferably, the outer diameter of the ball segment 21 is smaller than the inner diameter of the acetabulum liner 4, that is, there is a gap between the ball segment 21 and the inner surface of the acetabulum liner 4. During rotational separation, the separator 2 will not drive the acetabulum liner to rotate, thereby ensuring installation accuracy.

[0040] While the preferred embodiments of the present invention have been described in detail above, it should be understood that, after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. Such equivalents also fall within the scope of the claims appended hereto.

Claims

1. An acetabular liner clamping and installing device, characterized in that: include: A clamping member, comprising a cylindrical body and a plurality of claws extending radially from an outer peripheral surface of the cylindrical body, wherein the cylindrical body has a through hole extending axially therethrough, and each of the claws comprises a clamping surface that cooperates with an outer surface of the acetabulum liner, and the clamping surfaces of the plurality of claws are capable of clamping and fixing the acetabulum liner; A separator, comprising a spherical segment matched with the inner surface of the acetabulum liner and a rod extending axially from the middle portion of the spherical segment; The rod portion of the separating piece is located in the through hole of the column, and the separating piece can move along the axial direction of the column to separate the acetabulum liner from the clamping piece.

2. The acetabular liner clamping and installing device according to claim 1, wherein: The acetabulum liner clamping and installing device further comprises a liner having a hardness lower than that of the acetabulum liner, and the liner is fixed to the clamping surface.

3. The acetabular liner clamping and installing device according to claim 2, wherein: When the clamping member clamps and fixes the acetabulum liner, the liner is located between the clamping surface and the outer surface of the acetabulum liner.

4. The acetabular liner clamping and installing device according to claim 3, wherein: The liner includes a deformable portion. When the clamping member clamps and fixes the acetabulum liner, the deformable portion is located between the clamping surface and the outer surface of the acetabulum liner in a compressed state.

5. The acetabular liner holder and installer according to claim 4, wherein: The deformation portion is a peripheral wall of a groove, which includes an inner wall in contact with the acetabulum liner, an outer wall in contact with the clamping surface, and two connecting walls connecting the inner wall and the outer wall, with a gap between the inner wall and the outer wall.

6. The acetabular liner holder and installer according to claim 5, wherein: The inner wall and the outer wall both have curvatures, and the curvatures of the inner wall and the outer wall correspond to the curvatures of the acetabulum liner and the clamping surface, respectively.

7. The acetabular liner holder and installer according to claim 2, wherein: The liner includes a fixing portion, the clamping piece includes a groove matched with the fixing portion, and the fixing portion is located in the groove and fixed.

8. The acetabular liner holder and installer according to claim 1, wherein: The rod portion of the separating member is threadedly connected and fixed to the through hole of the column.

9. The acetabular liner holder and installer according to claim 8, wherein: The outer diameter of the spherical segment is smaller than the inner diameter of the acetabulum liner.

10. The acetabular liner holder and installer according to claim 1, wherein: The outer surface of the spherical segment is covered with a protective layer having a lower hardness than the acetabulum liner, or the spherical segment is made of a material having a lower hardness than the acetabulum liner.

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