CN114732571B

CN114732571B - Knee joint prosthesis and locking clamp thereof

Info

Publication number: CN114732571B
Application number: CN202210649805.3A
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-14
Anticipated expiration: 2042-06-10
Also published as: CN114732571A

Abstract

The invention provides a locking clamp of a knee joint prosthesis and the knee joint prosthesis, wherein the locking clamp of the knee joint prosthesis is used for locking a tibial plateau and a tibial gasket together, and the locking clamp comprises: a lock body removably disposed in the mounting gap; the elastic hook is connected to the first end of the lock body and is provided with a locking position matched with the locking groove in a locking mode and an unlocking position separated from the locking groove; the elastic arm is connected at the second end of lock body, and the elastic arm has the position of dodging the bellying and with bellying backstop complex backstop position, wherein, when elastic hook was located latched position and elastic arm was located backstop position, the bellying was pressed from both sides and is established between elastic hook and elastic arm to make the lock body locking in the holding tank. Therefore, the technical scheme of the application effectively solves the problem that the locking hook in the related technology is easy to loosen, so that the locking device is not firm in locking.

Description

Knee joint prosthesis and locking clamp thereof

Technical Field

The invention relates to the field of medical instruments, in particular to a locking clamp of a knee joint prosthesis and the knee joint prosthesis.

Background

The artificial joint replacement is suitable for patients with severe arthralgia, instability and deformity, severely limited daily life and activities, and ineffective or insignificant effect through conservative treatment. As shown in fig. 1 and 2, the artificial knee joint generally consists of a tibial plateau 41, a tibial insert 42, and a femoral condyle.

The problem of locking the tibial plateau 41 and the tibial insert 42 of the artificial knee joint together in the prior art is a difficulty, and various means are used to lock the tibial plateau 41 and the tibial insert 42, wherein a locking device 50 for locking the tibial plateau 41 and the tibial insert 42 together is provided in the related art.

In the above anti-falling structure 43 between the first side portion 412 of the tibial platform 41 and the tibial insert 42, the second side portion 413 of the tibial platform 41 opposite to the first side portion 412 is provided with the protruding portion 411 protruding upward, the side wall of the tibial insert 42 is provided with the receiving groove 421 along the horizontal direction, the protruding portion 411 penetrates into the receiving groove 421 from the bottom of the tibial insert 42, and a mounting gap is formed between the side wall of the receiving groove 421 facing the first side portion 412 and the side wall of the protruding portion 411 facing the first side portion 412. A locking groove is provided on a side wall of the notch of the protrusion 411 facing the receiving groove 421, and the locking device 50 includes a locking portion 51 and a locking hook 52. The lock part 51 is removably pushed into the mounting gap. The locking hook 52 is connected to a side of the locking portion 51 facing away from the first side portion 412, and the locking hook 52 and the locking portion 51 are clamped in the locking groove to lock the protrusion 411 in the receiving groove 421, so as to lock the tibial plateau 41 and the tibial insert 42 together.

In daily life and activity processes, the locking hook is easy to loosen, so that the locking device is not firm in locking.

Disclosure of Invention

The invention mainly aims to provide a locking clamp of a knee joint prosthesis and the knee joint prosthesis, and aims to solve the problems that locking hooks in the prior art are easy to loosen, and a locking device is not firm in locking.

In order to achieve the above object, according to an aspect of the present invention, there is provided a locking clip for a knee joint prosthesis, which is used to lock a tibial plateau and a tibial gasket together, an anti-falling structure is disposed between a first side portion of the tibial plateau and the tibial gasket, a protrusion portion protruding upward is disposed on a second side portion of the tibial plateau, the second side portion being opposite to the first side portion, an accommodating groove is disposed on a side wall of the tibial gasket along a horizontal direction, an avoiding notch is disposed at a bottom of the tibial gasket, the protrusion portion penetrates into the accommodating groove from the avoiding notch, an installation gap is disposed between a bottom wall of the accommodating groove and the protrusion portion, a locking groove is disposed on a side wall of the protrusion portion facing a notch of the accommodating groove, and the locking clip includes: a lock body removably disposed in the mounting gap; the elastic hook is connected to the first end of the lock body and is provided with a locking position matched with the lock groove in a locking mode and an unlocking position separated from the lock groove; the elastic arm is connected at the second end of lock body, and the elastic arm has the position of dodging the bellying and with bellying backstop complex backstop position, wherein, when elastic hook was located latched position and elastic arm was located backstop position, the bellying was pressed from both sides and is established between elastic hook and elastic arm to make the lock body locking in the holding tank.

Furthermore, the lock body is a lock plate, a first deformation notch is formed in the joint of the elastic hook and the first end of the lock plate, and a second deformation notch is formed in the joint of the elastic arm and the second end of the lock plate.

Furthermore, the side wall of the lock plate, which is far away from the first side part, comprises a clamping surface, and the clamping surface is positioned between the first deformation notch and the second deformation notch; the elastic hook comprises an arm body connected with the first end of the lock plate and a hook head connected to the arm body, an interval is arranged between the arm body and the clamping surface, part of the arm body and the hook head enclose a clamping space matched with the lock groove in a locking mode.

Furthermore, the side wall of the locking plate, which is far away from the first side part, also comprises an avoiding surface connected with the clamping surface, and the avoiding surface is positioned between the first deformation notch and the clamping surface; the elastic hook further comprises a stop protrusion arranged on one side, facing the avoiding surface, of the arm body, an interval is arranged between the stop protrusion and the avoiding surface, and the stop protrusion, the clamping surface, part of the arm body and the hook head enclose a clamping space.

Furthermore, a third deformation notch communicated with the clamping space is arranged on the stop protrusion, and when the space of the third deformation notch and the space of the first deformation notch are enlarged, the elastic hook is located at the unlocking position.

Furthermore, the avoiding surface is a step surface, the step surface comprises a first straight surface and a second straight surface which are positioned between the first deformation notch and the clamping surface, a first included angle is formed between the first straight surface and the second straight surface, and an oblique convex part is arranged on one side, facing the second straight surface, of the stop protrusion.

Further, the clamping face includes the third straight face of being connected with the face of dodging and the first inclined plane of being connected with the third straight face, and the third straight face protrusion is in the face of dodging, and first inclined plane sets up to keeping away from first side direction slope along the first end of jam plate to the second end direction of jam plate.

Further, the clamping surface comprises a second inclined surface connected between the third straight surface and the first inclined surface, and a second included angle is formed between the second inclined surface and the first inclined surface.

Furthermore, the lateral wall that first lateral part was kept away from to the jam plate still includes the spigot surface of being connected with the clamping face, and the spigot surface is located clamping face and second and warp between the breach, and the spigot surface is including the fourth straight face, third inclined plane and the fifth straight face that connect gradually, and the fourth is straight the face and is connected with the clamping face, and the fifth is straight the face and is connected with the lateral wall that the second warp the breach, and the fifth is straight the face by keeping away from first lateral part to being less than the fourth straight face in the direction that is close to first lateral part.

Furthermore, the locking plate also comprises an anti-falling convex part arranged at the connecting part of the guide surface and the side wall of the second deformation notch, the anti-falling convex part extends into the second deformation notch from the opening part of the second deformation notch, and a guide inclined surface is arranged on one side of the anti-falling convex part, which deviates from the inner part of the second deformation notch; and a fourth deformation notch communicated with the inside of the second deformation notch is arranged at the joint of the anti-falling convex part and the side wall of the second deformation notch.

Further, the terminal surface of the first end of jam plate and the terminal surface of the second end of jam plate all are provided with instrument antiskid mouthful.

According to another aspect of the present invention, there is provided a knee joint prosthesis, comprising a tibial plateau, a tibial insert and a locking clip for locking the tibial plateau and the tibial insert together, the locking clip being the locking clip of the above-mentioned knee joint prosthesis; the raised part on the tibial platform comprises a first raised part and a second raised part, a space is formed between the first raised part and the second raised part, a first locking groove is formed in the side wall of the notch of the first raised part facing the accommodating groove of the tibial gasket, and a second locking groove is formed in the side wall of the notch of the second raised part facing the accommodating groove; the elastic hook of the lock clamp is provided with a locking position which is in locking fit with the first lock groove and an unlocking position which is separated from the first lock groove; the elastic arm of lock clamp has dodges first bellying and the bellied position of dodging of second and with the protruding backstop complex backstop position of second, wherein, when elastic hook was located latched position and elastic arm was located the backstop position, first bellying and the protruding clamp of second were established between elastic hook and elastic arm to make the lock body locking in the holding tank.

By applying the technical scheme of the invention, the locking clamp of the knee joint prosthesis is used for locking the tibial plateau and the tibial gasket together. An anti-falling structure is arranged between the first side part of the tibial plateau and the tibial gasket. The second lateral part of the tibial plateau, which is arranged opposite to the first lateral part, is provided with a convex part which is arranged in an upward protruding manner, and the lateral wall of the tibial gasket is provided with a containing groove along the horizontal direction. The bottom of shin bone gasket is provided with dodges the breach, and the bellying penetrates to the holding tank in by dodging the breach. An installation gap is arranged between the bottom wall of the accommodating groove and the bulge. The side wall of the notch of the bulge part facing the accommodating groove is provided with a locking groove. The lock clip includes: lock body, elastic hook and elastic arm. The lock body is removably disposed within the mounting gap. The elastic hook is connected to the first end of the lock body. The elastic hook is provided with a locking position matched with the locking groove in a locking mode and an unlocking position separated from the locking groove. The spring arm is connected to the second end of the lock body. The elastic arm is provided with an avoiding position for avoiding the bulge part and a stopping position matched with the stopping of the bulge part. In this application, the in-process in the installation clearance is placed to the lock body, the elastic arm receives the extrusion deformation of bellying in order to be located dodges the position, the bellying is located between elastic arm and the elastic hook after crossing the elastic arm, when the elastic hook is located latched position and elastic arm and is located the backstop position, the bellying is pressed from both sides and is established between elastic hook and elastic arm, the lock body can't move to the second end direction of lock body along the first end of lock body in the holding tank, so that the lock body locking is in the holding tank. Thereby avoiding the elastic hook from loosening and enabling the locking clamp to be locked firmly. Therefore, the technical scheme of this application can solve the locking hook among the correlation technique and become flexible easily for locking device locking insecure problem.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is an exploded view schematically showing a knee joint prosthesis in the related art;

FIG. 2 shows a schematic side view of the knee joint prosthesis of FIG. 1;

FIG. 3 shows a perspective view of an embodiment of a knee joint prosthesis according to the present invention;

FIG. 4 shows a schematic front view of the knee joint prosthesis of FIG. 3;

FIG. 5 shows a schematic side view of the knee joint prosthesis of FIG. 3;

FIG. 6 shows a rear view schematic of the knee joint prosthesis of FIG. 3;

FIG. 7 illustrates a perspective view of a tibial plateau of the knee prosthesis of FIG. 3;

FIG. 8 is a perspective view of the locking clip of the knee prosthesis of FIG. 3 mounted on a tibial plateau;

fig. 9 shows a top schematic view of the locking clip of fig. 8 mounted on a tibial plateau;

fig. 10 shows a front view of the locking clip of fig. 8 mounted on a tibial plateau;

FIG. 11 illustrates a perspective view of a locking clip of the knee joint prosthesis of FIG. 3;

FIG. 12 shows a top schematic view of the latching clip of FIG. 11;

FIG. 13 illustrates a schematic top view of the spring arm of the latching clip of FIG. 11 in a retracted position;

FIG. 14 shows a top view of the clip of FIG. 11 with the resilient hook in the locked position and the resilient arm in the stop position;

FIG. 15 shows a schematic top view of the latching clip of FIG. 11 with the resilient hook in the latched position and the resilient arm of the latching clip in the retracted position;

FIG. 16 shows a schematic top view of the latching clip of FIG. 11 with the resilient hook in an unlatched position and the resilient arm of the latching clip in an escape position;

fig. 17 shows a schematic top view of the latching clip of fig. 11 when removed from the receiving slot.

Wherein the figures include the following reference numerals:

10. a lock body; 11. an avoidance surface; 111. a first straight face; 112. a second straight face; 12. a clamping surface; 121. a third straight face; 122. a first inclined plane; 123. a second inclined plane; 13. a guide surface; 131. a fourth straight face; 132. a third inclined plane; 133. a fifth straight surface; 14. an anti-drop convex part; 15. a fourth deformation notch; 16. a tool anti-slip port;

20. an elastic hook; 21. a first deformation notch; 22. a second deformation notch; 23. an arm body; 24. a hook head; 25. a stopper projection; 251. a third deformation notch; 26. an oblique convex portion;

30. a resilient arm; 41. a tibial plateau; 411. a boss portion; 4111. locking the groove; 412. a first side portion; 413. a second side portion; 42. a tibial insert; 421. accommodating grooves; 43. an anti-falling structure;

50. a locking device; 51. a lock portion; 52. a locking hook; H. and (7) installing a gap.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn as actual proportional relationships for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

As shown in fig. 3 to 9 and 13 to 17, the locking clip of the knee joint prosthesis of the present embodiment is used to lock the tibial plateau 41 and the tibial insert 42 together. A retaining structure 43 is provided between the first side 412 of the tibial plateau 41 and the tibial insert 42. A second side 413 of the tibial platform 41 opposite to the first side 412 is provided with a convex portion 411 protruding upwards, and a side wall of the tibial insert is provided with a receiving groove 421 along the horizontal direction. The bottom of the tibia gasket 42 is provided with an avoiding gap, and the protruding portion 411 penetrates into the accommodating groove 421 through the avoiding gap. The bottom wall of the receiving groove 421 has a mounting gap H with the protrusion 411. A locking groove 4111 is formed on a side wall of the protrusion 411 facing the notch of the receiving groove 421. The lock clip includes: a lock body 10, a resilient hook 20, and a resilient arm 30. The lock body 10 is removably disposed within the mounting gap H. A resilient hook 20 is attached to a first end of the lock body 10. The resilient hook 20 has a locking position in locking engagement with the lock groove 4111 and an unlocking position separated from the lock groove 4111. The spring arm 30 is attached to a second end of the lock body 10. The spring arm 30 has an escape position to escape the boss 411 and a stopper position to be stopper-fitted to the boss 411. In the present embodiment, when the elastic hook 20 is located at the locking position and the elastic arm 30 is located at the stopping position, the protrusion 411 is sandwiched between the elastic hook 20 and the elastic arm 30, so that the lock body 10 is locked in the receiving groove 421.

With the technical solution of the present embodiment, as shown by the arrow in fig. 13, in the process that the lock body 10 is placed in the installation gap H, the elastic arm 30 is pressed and deformed by the protrusion 411 to be located at the avoiding position, the protrusion 411 is located between the elastic arm 30 and the elastic hook 20 after crossing the elastic arm 30, when the elastic hook 20 is located at the locking position and the elastic arm 30 is located at the stopping position, the protrusion 411 is sandwiched between the elastic hook 20 and the elastic arm 30, and the lock body 10 cannot move in the direction from the first end of the lock body 10 to the second end of the lock body 10 in the receiving slot 421, so that the lock body 10 is locked in the receiving slot 421. Thereby preventing the elastic hook 20 from being loosened so that the clip can be securely locked. Therefore, the technical solution of the present embodiment can solve the problem that the locking hook 52 in the related art is easily loosened, so that the locking device is not locked firmly.

When the tibial insert 42 needs to be replaced or the tibial platform 41 and the tibial insert 42 need to be separated during a revision surgery, the locking clip needs to be removed from the receiving groove 421. As shown by the arrows in fig. 15 to 17, when the elastic arm 30 is switched from the stop position to the avoiding position and the elastic hook 20 is switched from the locking position to the unlocking position in the process of taking out the lock clip from the receiving slot 421, the lock body 10 can be loosened in the installation gap H without interference on the taking-out path, so that the lock body 10 can move along the direction from the second end of the lock body 10 to the first end of the lock body 10, and the lock clip can be taken out from the receiving slot 421, so as to facilitate the replacement or revision of the tibial gasket 42.

In this embodiment, the anti-slip structure 43 includes a barb disposed on the first side portion 412 and a groove disposed at the bottom of the tibial insert 42, and the barb and the groove can be inserted together along the platform surface of the tibial platform 41, so that the first side portion 412 of the tibial platform 41 and the tibial insert 42 can be stopped together, and the second side portion 413 of the tibial platform 41 and the tibial insert 42 are locked together in the accommodating groove 421 due to the lock 10, so as to lock the second side portion 413 of the tibial platform 41 and the tibial insert 42 together, and further, the tibial platform 41 and the tibial insert 42 can be locked together.

As shown in fig. 3-17, the lock body 10 is a lock plate for ease of manufacture. The joint of the elastic hook 20 and the first end of the lock plate is provided with a first deformation notch 21, and the joint of the elastic arm 30 and the second end of the lock plate is provided with a second deformation notch 22. In this way, the first deformation notch 21 is provided to facilitate deformation of the connection between the elastic hook 20 and the first end of the lock plate, and the elastic hook 20 can be switched between the lock position and the unlock position. The second deformation notch 22 is provided to facilitate deformation of the connection between the elastic arm 30 and the second end of the lock plate, and the elastic arm 30 can be switched between the stop position and the avoidance position.

As shown in fig. 3 to 17, the side wall of the lock plate remote from the first side 412 includes a clamping surface 12, and the clamping surface 12 is located between the first deformation notch 21 and the second deformation notch 22. The resilient hook 20 includes an arm 23 connected to a first end of the lock plate and a hook head 24 connected to the arm 23. The arm 23 is spaced from the clamping surface 12, and the clamping surface 12, a part of the arm 23 and the hook 24 enclose a clamping space locked with the locking groove 4111. Like this, arm 23 is located the locked groove 4111, and the cooperation of the lateral wall backstop that is adjacent with locked groove 4111 of gib head 24 and bellying 411, bellying 411 are injectd in the centre gripping space, are favorable to improving the locking effect of split collet.

As shown in fig. 3 to 17, the side wall of the lock plate away from the first side part 412 further includes an avoiding surface 11 connected to the clamping surface 12. The escape surface 11 is located between the first deformation notch 21 and the clamping surface 12. The elastic hook 20 further includes a stopper protrusion 25 disposed on a side of the arm 23 facing the escape surface 11, and a space is provided between the stopper protrusion 25 and the escape surface 11. The stop projection 25, the holding surface 12, the partial arm 23 and the hook head 24 enclose a holding space. Thus, the arm 23 is located in the locking groove 4111, the hook head 24 is in stop fit with the side wall of the protrusion 411 adjacent to the locking groove 4111, the stop protrusion 25 is in surface-to-surface contact fit with the side wall of the protrusion 411, stress concentration of the locking clamp is improved, friction is reduced, the protrusion 411 is reliably limited in the clamping space, and the locking effect of the locking clamp is further improved.

Specifically, the protruding portion of the present embodiment further includes a guide groove that is in guiding fit with the holding surface 12, so that a mounting gap H is formed between the guide groove and the bottom wall of the receiving groove 421, and the lock plate is easily pushed into the mounting gap H along the receiving groove 421 and the guide groove.

In this embodiment, the portion of the protruding portion located at the locking groove 4111 is a right-angle trapezoidal block, the groove bottom wall of the locking groove 4111 is an oblique waist surface of the right-angle trapezoidal block, the groove bottom wall of the guide groove is a right-angle waist surface of the right-angle trapezoidal block, the side surface of the protruding portion 411 in surface contact with the side wall surface of the stopping protrusion 25 is an upper bottom surface of the right-angle trapezoidal block, and the side surface of the protruding portion 411 in surface contact with the hook head 24 is a lower bottom surface of the right-angle trapezoidal block. In this way, the boss 411 can be reliably confined within the clamping space.

As shown in fig. 3 to 17, the stopper projection 25 is provided with a third deformation notch 251 communicating with the holding space. The third deformation notch 251 is provided to facilitate the arm body 23 to be easily deformed, as indicated by an arrow in fig. 13, in the process that the lock body 10 is placed in the installation gap H, the elastic arm 30 is extruded and deformed by the protruding portion 411 to be located at an avoiding position, after the protruding portion 411 passes over the elastic arm 30, the protruding portion 411 pushes the elastic hook 20 to enlarge the space of the third deformation notch 251, the elastic hook 20 is deformed, the protruding portion 411 easily enters the clamping space, when the protruding portion 411 enters the clamping space, the space of the third deformation notch 251 is restored, and the protruding portion 411 is limited in the clamping space. Moreover, after the locking clip is implanted into a human body, the raised part is easy to support the arm body 23 under the action of torsional force, the arm body 23 is easy to be repeatedly supported under the action of the third deformation notch 251, stress concentration at the joint of the arm body 23 and the stopping projection 25 is avoided, and the locking clip is not easy to damage. When the spaces of the third deformation notch 251 and the first deformation notch 21 are both enlarged, the elastic hook 20 is in the unlocking position. Thus, when the elastic arm 30 is switched from the stopper position to the retreat position and the elastic hook 20 is switched from the lock position to the unlock position, the clip can be easily taken out from the housing groove.

As shown in fig. 8 to 17, the relief surface 11 is a stepped surface including a first straight surface 111 and a second straight surface 112 between the first deformation notch 21 and the clamping surface 12. The first straight surface 111 and the second straight surface 112 form a first included angle therebetween. Thus, in the process of deforming the arm body 23, the first included angle can avoid the stopper protrusion 25 deformed along with the arm body 23, and the stopper protrusion 25 is prevented from interfering with the avoiding surface 11. When the elastic hook 20 is located at the locking position and the elastic arm 30 is located at the stopping position, the protrusion 411 is clamped in the clamping space, and when the arm body 23 is deformed, since the inclined protrusion 26 is arranged on the side of the stopping protrusion 25 facing the second straight surface 112, and the inclined protrusion 26 is in stopping fit with the stopping protrusion 25, the arm body 23 is prevented from being deformed too much, so that the protrusion 411 moves in the clamping space, and the locking reliability of the elastic hook 20 when located at the locking position is ensured. When the elastic hook 20 needs to be switched from the locking position to the unlocking position, the space of the third deformation notch 251 is gradually increased, and the stopper protrusion 25 is easily deformed, so that the stopper protrusion 25 is easily separated from the protruding portion 411, and the elastic hook 20 can be located at the unlocking position.

Specifically, the first deformation notch 21 includes an arc-shaped section and a semicircular section connected to a first end of the arc-shaped section, the stop protrusion 25 is provided with a flaring section connected to a second end of the arc-shaped section, and a minimum distance between a side wall of the flaring section and a side wall of the third deformation notch 251 is smaller than a size of the projection portion along a direction from the first end of the lock plate to the second end of the lock plate, so that the oblique projection 26 is easily deformed.

As shown in fig. 8 to 17, the clamping surface 12 includes a third straight surface 121 connected to the escape surface 11 and a first inclined surface 122 connected to the third straight surface 121. The third straight surface 121 protrudes from the escape surface 11, and the first inclined surface 122 is inclined in a direction from the first end of the lock plate to the second end of the lock plate and in a direction away from the first side portion 412. The third straight surface 121 is provided to facilitate insertion of the locking plate into the guide slot. When the elastic hook 20 is located at the locking position, the first inclined surface 122 and the protrusion can be in stop fit, and the protrusion is prevented from exiting the clamping space along the direction from the second end of the locking plate to the first end of the locking plate. When the elastic hook 20 is located at the unlocking position, the first inclined surface 122 and the protruding portion can be in guiding fit, so that the first inclined surface 122 can smoothly slide from the outer side of the protruding portion, and the protruding portion exits from the clamping space along the direction from the second end of the lock plate to the first end of the lock plate relative to the first inclined surface 122. In order to meet the above requirement, the included angle between the first inclined surface 122 and the third straight surface 121 is in the range of 10 ° to 80 °, and the included angle between the first inclined surface 122 and the extension surface of the third straight surface 121 is preferably 15 ° or 30 ° or 45 ° or 60 °.

As shown in fig. 8 to 17, the clamping surface 12 includes a second inclined surface 123 connected between the third straight surface 121 and the first inclined surface 122, and a second included angle is formed between the second inclined surface 123 and the first inclined surface 122. After the human body is implanted to the collet, the shin bone gasket receives torsional force effect down, and the shin bone gasket can present certain angle for the collet, and second inclined plane 123 can guarantee to guarantee under the torsional state that the contact surface between jam plate and the bellying is the face-to-face contact, and the non-point contact, has improved the stress concentration of collet like this, can reduce the friction. In order to meet the above requirement, the included angle between the third straight surface 121 and the second inclined surface 123 is in the range of 170 ° to 179 °. The angle between the third straight surface 121 and the second inclined surface 123 is preferably 173 ° or 175 ° or 178 °.

As shown in fig. 8 to 17, the side wall of the lock plate away from the first side part 412 further includes a guide surface 13 connected to the clamping surface 12, and the guide surface 13 is located between the clamping surface 12 and the second deformation notch 22. The guiding surface 13 includes a fourth straight surface 131, a third inclined surface 132 and a fifth straight surface 133 connected in sequence, the fourth straight surface 131 is connected to the holding surface 12, the fifth straight surface 133 is connected to the side wall of the second deformation notch 22, and the fifth straight surface 133 is lower than the fourth straight surface 131 in the direction from the position far away from the first side portion 412 to the position near the first side portion 412. The elastic arm 30 is pressed and deformed by the convex portion 411 to be located at the avoiding position, and after the convex portion 411 passes over the elastic arm 30, the convex portion 411 moves along the fifth straight surface 133, the third inclined surface 132 and the fourth straight surface 131, so that the convex portion 411 can move along the guide surface 13 smoothly relative to the locking clip.

As shown in fig. 8 to 17, the lock plate further includes an anti-separation protrusion 14 disposed at a connection portion between the guide surface 13 and a side wall of the second deformation notch 22, the anti-separation protrusion 14 extends into the second deformation notch 22 from a mouth portion of the second deformation notch 22, and a guide inclined surface is disposed on a side of the anti-separation protrusion 14 away from the inside of the second deformation notch 22. The provision of the second deformation notch 22 facilitates easy deformation of the resilient arm 30. A fourth deformation notch 15 communicating with the inside of the second deformation notch 22 is provided at the joint of the anti-slip convex portion 14 and the side wall of the second deformation notch 22. The fourth deformation notch 15 is provided so that the anti-slip projection 14 can be deformed. After the elastic arm 30 is pressed by the protrusion 411, the elastic arm 30 slides along the guide slope and is pressed until the anti-falling-off protrusion 14 deforms into the second deformation notch 22, so that the elastic arm 30 slides into the second deformation notch 22, the space of the fourth deformation notch 15 recovers, the anti-falling-off protrusion 14 resets, the end of the elastic arm 30 is stopped, and the elastic arm 30 is prevented from separating from the fourth deformation notch 15, so that the elastic arm 30 is kept at the avoiding position.

As shown in fig. 8 to 17, in order to facilitate the operation of the surgical tool, the end surface of the first end of the locking plate and the end surface of the second end of the locking plate are provided with tool anti-slip ports 16. Thus, the surgical tool can be clamped in the tool anti-slip opening 16, the surgical tool is prevented from sliding relative to the locking plate, and the surgical tool can be conveniently operated to take out the locking clamp.

The present application further provides a knee joint prosthesis, as shown in fig. 3 to 8, the knee joint prosthesis of the present embodiment includes a tibial plateau 41, a tibial insert 42, and a locking clip, the locking clip is used to lock the tibial plateau 41 and the tibial insert 42 together, and the locking clip is the locking clip of the above knee joint prosthesis. Since the above-described locking clip of the knee joint prosthesis can solve the problem that the locking hooks 52 are easily loosened to make the locking device locked loosely in the related art, the knee joint prosthesis including the locking clip can solve the same technical problem. The convex part 411 on the tibial platform 41 comprises a first convex part and a second convex part, a gap is formed between the first convex part and the second convex part, a first locking groove is formed on the side wall of the notch of the accommodating groove 421 of the first convex part facing the tibial gasket 42, and a second locking groove is formed on the side wall of the notch of the second convex part facing the accommodating groove 421; the elastic hook 20 of the lock clip has a locking position in locking fit with the first lock groove and an unlocking position separated from the first lock groove; the elastic arm 30 of the lock clip has an avoiding position for avoiding the first protrusion and the second protrusion and a stopping position for stopping the second protrusion, wherein when the elastic hook 20 is located at the locking position and the elastic arm 30 is located at the stopping position, the first protrusion and the second protrusion are clamped between the elastic hook 20 and the elastic arm 30, so that the lock body 10 is locked in the accommodating groove 421.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking clamp of a knee joint prosthesis is used for locking a tibial plateau (41) and a tibial gasket (42) together, an anti-disengaging structure (43) is arranged between a first side part (412) of the tibial plateau (41) and the tibial gasket (42), a boss (411) which is upwards convexly arranged is arranged on a second side part (413) of the tibial plateau (41) which is opposite to the first side part (412), an accommodating groove (421) is arranged on the side wall of the tibial gasket along the horizontal direction, an avoiding notch is arranged at the bottom of the tibial gasket (42), the boss (411) penetrates into the accommodating groove (421) through the avoiding notch, an installation gap (H) is formed between the bottom wall of the accommodating groove (421) and the boss (411), and a locking groove (4111) is arranged on the side wall of the boss (411) facing to a notch of the accommodating groove (421),

it is characterized in that the preparation method is characterized in that,

the latching clip includes:

a lock body (10), wherein the lock body (10) is arranged in the installation gap (H) in a removable manner;

a resilient hook (20) connected to a first end of the lock body (10), the resilient hook (20) having a locked position in locking engagement with the lock groove (4111) and an unlocked position separated from the lock groove (4111);

the elastic arm (30) is connected to the second end of the lock body (10), the elastic arm (30) is provided with an avoiding position for avoiding the bulge part (411) and a stopping position matched with the bulge part (411) in a stopping way,

when the elastic hook (20) is located at the locking position and the elastic arm (30) is located at the stopping position, the bulge part (411) is clamped between the elastic hook (20) and the elastic arm (30) so that the lock body (10) is locked in the accommodating groove (421);

the lock body (10) is a lock plate, and the side wall of the lock plate, which is far away from the first side part (412), comprises a clamping surface (12);

the side wall of the locking plate far away from the first side part (412) further comprises an avoiding surface (11) connected with the clamping surface (12);

the clamping surface (12) comprises a third straight surface (121) connected with the avoiding surface (11) and a first inclined surface (122) connected with the third straight surface (121), the third straight surface (121) protrudes out of the avoiding surface (11), and the first inclined surface (122) is obliquely arranged along the direction from the first end of the locking plate to the second end of the locking plate and in the direction away from the first side part (412).

2. The latching clip according to claim 1, characterized in that the resilient hook (20) is provided with a first deformation notch (21) at the connection with the first end of the locking plate and the resilient arm (30) is provided with a second deformation notch (22) at the connection with the second end of the locking plate.

3. The latching clip of claim 2,

the clamping surface (12) is located between the first deformation notch (21) and the second deformation notch (22);

elastic hook (20) include with arm body (23) that the first end of lock board is connected and connect hook (24) on arm body (23), arm body (23) with have the interval between clamping face (12), part arm body (23) and hook (24) enclose into with locked groove (4111) locking complex centre gripping space.

4. The latching clip according to claim 3, characterized in that the escape surface (11) is located between the first deformation notch (21) and the clamping surface (12);

elastic hook (20) are still including setting up arm body (23) orientation dodge protruding (25) of backstop of face (11) one side, backstop protruding (25) with dodge and have the interval between face (11), backstop protruding (25) clamping face (12), part arm body (23) and gib head (24) enclose into the centre gripping space.

5. The latching clip according to claim 4, characterized in that the stop projection (25) is provided with a third deformation notch (251) communicating with the clamping space, and when the space of the third deformation notch (251) and the space of the first deformation notch (21) are both enlarged, the resilient hook (20) is in the unlocking position.

6. The lock clip according to claim 4, characterized in that the avoiding surface (11) is a step surface comprising a first straight surface (111) and a second straight surface (112) between the first deformation notch (21) and the clamping surface (12), a first included angle is formed between the first straight surface (111) and the second straight surface (112), and an oblique convex part (26) is arranged on one side of the stopping protrusion (25) facing the second straight surface (112).

7. The latching clip according to claim 1, wherein the clamping surface (12) further comprises a second ramp surface (123) connected between the third straight surface (121) and the first ramp surface (122), the second ramp surface (123) and the first ramp surface (122) forming a second angle therebetween.

8. The latching clip according to claim 4, characterized in that the side wall of the locking plate remote from the first side (412) further comprises a guide surface (13) connected to the clamping surface (12), the guide surface (13) being located between the clamping surface (12) and the second deformation notch (22), the guide surface (13) comprising a fourth straight surface (131), a third inclined surface (132) and a fifth straight surface (133) connected in sequence, the fourth straight surface (131) being connected to the clamping surface (12), the fifth straight surface (133) being connected to the side wall of the second deformation notch (22), the fifth straight surface (133) being lower than the fourth straight surface (131) in a direction from remote from the first side (412) to close to the first side (412).

9. The latching clip of claim 8,

the lock plate further comprises an anti-falling convex part (14) arranged at the connecting part of the guide surface (13) and the side wall of the second deformation notch (22), the anti-falling convex part (14) extends into the second deformation notch (22) from the opening part of the second deformation notch (22), and a guide inclined surface is arranged on one side of the anti-falling convex part (14) departing from the inner part of the second deformation notch (22);

and a fourth deformation notch (15) communicated with the inside of the second deformation notch (22) is arranged at the joint of the anti-falling convex part (14) and the side wall of the second deformation notch (22).

10. The latching clip according to claim 2, characterized in that the end surface of the first end of the latching plate and the end surface of the second end of the latching plate are provided with a tool anti-slip opening (16).

11. A knee joint prosthesis comprising a tibial plateau (41), a tibial insert (42) and a locking clip for locking the tibial plateau (41) and the tibial insert (42) together, the locking clip being a locking clip of the knee joint prosthesis of any one of claims 1 to 10;

the bulge (411) on the tibial platform (41) comprises a first bulge and a second bulge, a space is formed between the first bulge and the second bulge, a first locking groove is formed in the side wall of the notch of the first bulge facing the accommodating groove (421) of the tibial gasket (42), and a second locking groove is formed in the side wall of the notch of the second bulge facing the accommodating groove (421);

the elastic hook (20) of the lock clip is provided with a locking position matched with the first lock groove in a locking way and an unlocking position separated from the first lock groove;

the elastic arm (30) of the lock clip is provided with an avoiding position for avoiding the first bulge and the second bulge and a stopping position matched with the second bulge in a stopping way,

when the elastic hook (20) is located at the locking position and the elastic arm (30) is located at the stopping position, the first protruding part and the second protruding part are clamped between the elastic hook (20) and the elastic arm (30) so that the lock body (10) is locked in the accommodating groove (421).