CN116509495A

CN116509495A - Osteotomy plate locking device

Info

Publication number: CN116509495A
Application number: CN202210068134.1A
Authority: CN
Inventors: 付长帅; 黄欢欢; 孙延东
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2023-08-01

Abstract

The invention provides a bone cutting plate locking device, which comprises: an osteotomy plate, a base, and a locking assembly; the osteotomy plate is detachably connected with the base body along a first direction; the locking assembly is movably connected with the base body along a second direction which is angled with respect to the first direction; the locking assembly moves in the second direction between a first position and a second position; locking the relative position of the osteotomy plate and the base when the locking assembly is in the first position; when the locking assembly is in the second position, the locking of the relative positions of the osteotomy plate and the base is released. So dispose, can lock the osteotomy plate on the base member through locking assembly, guaranteed that the osteotomy plate can not deviate from the base member in the use, improve the efficiency in the art, reduce user's injury risk.

Description

Osteotomy plate locking device

Technical Field

The invention relates to the technical field of medical appliances, in particular to a bone cutting plate locking device.

Background

In the unicondylar replacement operation process, when the tibia side is treated, the tibia osteotomy plate is required to be assisted, and the position of the tibia osteotomy plate on the tibia is required to be determined by a tibia osteotomy marrow positioning tool. Currently, tibial osteotomies plates are divided into two types, one type and one type. The integrated tibia osteotomy plate is simple in structure and stable in the use process, but the osteotomy quantity is constant, if the change of the osteotomy quantity is completed by readjusting the tibia osteotomy extra-marrow positioning tool, the increase of the positions of nail holes after secondary positioning is brought, and the fracture risk occurs. The split type tibia osteotomy plate has adjustable osteotomy quantity, and can be realized by selecting different osteotomy plugs without changing a tibia osteotomy extramedullary positioning tool. However, the bone cutting plug is not provided with a limiting or locking device generally when cutting bone, so that the bone cutting plug is easy to loose, the user experience is influenced by a light person, the operation time is prolonged, the bone cutting plug is separated by a heavy person, and the deviation is caused to the bone cutting quantity or the injury is caused to the user.

Disclosure of Invention

The invention aims to provide a locking device for an osteotomy plate, which solves the problem that an osteotomy plug in the existing tibia osteotomy plate is easy to loosen or deviate from.

In order to solve the above technical problems, the present invention provides a locking device for an osteotomy plate, comprising: an osteotomy plate, a base, and a locking assembly;

the osteotomy plate is detachably connected with the base body along a first direction;

the locking assembly is movably connected with the base body along a second direction which is angled with respect to the first direction; the locking assembly moves in the second direction between a first position and a second position;

locking the relative position of the osteotomy plate and the base when the locking assembly is in the first position;

when the locking assembly is in the second position, the locking of the relative positions of the osteotomy plate and the base is released.

Optionally, the substrate has a first elongated hole, and a long axis of the first elongated hole extends along the second direction;

at least a portion of the locking assembly is movably disposed in the first elongated hole in the second direction and is restrained from moving in the short axis direction by the first elongated hole.

Optionally, the locking assembly includes a push-push member and a guide member connected to the push-push member, the push-push member having a friction feature, the guide member being configured to movably pass through the first elongated aperture;

when the locking assembly is in the first position, the push-push piece is used for abutting against the osteotomy plate so as to limit the osteotomy plate to move along the first direction, thereby realizing the locking of the relative positions of the osteotomy plate and the matrix;

when the locking assembly is in the second position, the push member releases the abutment with the osteotomy plate, allowing the osteotomy plate to be moved in the first direction to withdraw from the base.

Optionally, the base has a pin hole, the pin hole is arranged at an angle to the first elongated hole, and the pin hole is in communication with the first elongated hole; the guide has a second elongated hole, a long axis of which extends in the second direction;

the osteotomy plate locking device comprises a pin shaft, the pin shaft is simultaneously arranged through the pin hole and the second strip hole in a penetrating mode, and the pin shaft limits the locking assembly to move along the axial direction of the first strip hole.

Optionally, the osteotomy plate locking device further comprises a potential energy component;

one end of the potential energy component is connected with the locking component, and the other end of the potential energy component is connected with the base body;

when the locking assembly is not subjected to external force, the locking assembly is in the first position;

the potential energy assembly is configured to store potential energy during movement of the locking assembly from the first position to the second position; potential energy is released during movement of the locking assembly from the second position to the first position.

Optionally, the potential energy component comprises an elastic piece and a fixing piece;

the substrate is provided with a tail hole which is formed along the second direction; the elastic piece is arranged in the tail hole in a penetrating way and is connected with the locking component; at least one part of the fixing piece is penetrated in the tail hole and connected with the elastic piece; the securing member is restrained against axial displacement relative to the tail aperture.

Optionally, the tail hole is provided with an internal thread, and the fixing piece is provided with an external thread matched with the internal thread; the fixing piece is in threaded connection with the tail hole.

Optionally, the elastic member is a spring, and the spring has two opposite end faces perpendicular to the second direction, and the two end faces are respectively in abutting connection with the locking assembly and the fixing member.

Optionally, the locking component is provided with a limiting groove, and the limiting groove is used for being in abutting connection with the elastic piece.

Optionally, the substrate is provided with a clamping groove which is opened along the first direction, and one end of the clamping groove along the first direction is opened, and the other end of the clamping groove is closed; the bone cutting plate is provided with a clamping tooth matched with the clamping groove, the clamping tooth is used for being clamped into the clamping groove by the open end of the clamping groove, and the closed end of the clamping groove is used for propping against the bone cutting plate; after the clamping teeth are clamped into the clamping grooves, the freedom degrees except the first direction are limited by the clamping grooves.

In summary, the locking device for osteotomy plate provided by the present invention includes: an osteotomy plate, a base, and a locking assembly; the osteotomy plate is detachably connected with the base body along a first direction; the locking assembly is movably connected with the base body along a second direction which is angled with respect to the first direction; the locking assembly moves in the second direction between a first position and a second position; locking the relative position of the osteotomy plate and the base when the locking assembly is in the first position; when the locking assembly is in the second position, the locking of the relative positions of the osteotomy plate and the base is released.

So dispose, can lock the osteotomy plate on the base member through locking assembly, guaranteed that the osteotomy plate can not deviate from the base member in the use, improve the efficiency in the art, reduce user's injury risk.

Drawings

Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

FIG. 1 is an exploded view of an osteotomy plate locking device of an embodiment of the present invention;

FIG. 2 is a schematic illustration of a substrate according to an embodiment of the invention;

FIG. 3 is a schematic view of an osteotomy plate according to an embodiment of the invention;

FIGS. 4 a-4 d are schematic illustrations of cross-sectional shapes of several latches according to embodiments of the present invention;

FIG. 5 is a schematic view of a locking assembly of an embodiment of the present invention;

FIG. 6 is a schematic view of an elastic member according to an embodiment of the present invention;

FIG. 7 is a schematic view of a fastener according to an embodiment of the present invention;

FIG. 8 is a side view of an osteotomy plate locking device of an embodiment of the invention;

fig. 9 is a section A-A of fig. 8.

In the accompanying drawings:

1-a substrate; 1 A-A clamping groove; 1 b-a first elongate aperture; 1 c-pin holes; 1 d-tail hole; 2-osteotomy plate; 2 a-latch; a 3-lock assembly; 3 a-pushing the push piece; 3 b-a guide; 3 c-a second elongated aperture; 3 d-a limit groove; 4-elastic members; 4a, 4 b-end faces; 5-fixing pieces; 5 A-An abutment surface; 5 b-force application feature; 5 c-external threads; and 6, a pin shaft.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.

As used in this disclosure, the singular forms "a," "an," and "the" include plural referents, the term "or" are generally used in the sense of comprising "and/or" and the term "several" are generally used in the sense of comprising "at least one," the term "at least two" are generally used in the sense of comprising "two or more," and the term "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or number of features indicated. Thus, a feature defining "first", "second", "third" may include, explicitly or implicitly, one or at least two of such features, the term "proximal" typically being the end proximal to the operator, the term "distal" typically being the end proximal to the patient, i.e. proximal to the lesion, "one end" and "other end" and "proximal" and "distal" typically referring to the corresponding two parts, including not only the endpoints, but also the terms "mounted", "connected" are to be construed broadly, e.g. may be a fixed connection, may be a removable connection, or may be integral; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, as used in this disclosure, an element disposed on another element generally only refers to a connection, coupling, cooperation or transmission between two elements, and the connection, coupling, cooperation or transmission between two elements may be direct or indirect through intermediate elements, and should not be construed as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation, such as inside, outside, above, below, or on one side, of the other element unless the context clearly indicates otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The following description refers to the accompanying drawings.

Referring to fig. 1 and 2, and referring to fig. 8 and 9 in combination, the present embodiment provides an osteotomy plate locking device, which includes: osteotomy plate 2, base 1, and locking assembly 3; the osteotomy plate 2 is detachably connected to the base 1 in a first direction (direction O1 in fig. 2 and 9); the locking assembly 3 is movably connected to the base 1 in a second direction (direction O2 in fig. 2 and 9) which is angled to the first direction; the locking assembly 3 is movable in the second direction between a first position and a second position; locking the relative position of the osteotomy plate 2 and the base 1 when the locking assembly 3 is in the first position (see figures 8 and 9); when the locking assembly 3 is in the second position, the locking of the relative positions of the osteotomy plate 2 and the base 1 is released. So configured, the osteotomy plate 2 can be locked on the base 1 by the locking assembly 3, so that the osteotomy plate 2 is prevented from falling out of the base 1 in the use process, the intraoperative efficiency is improved, and the injury risk of a user is reduced. In the example shown in fig. 1 and 2, an acute angle is formed between the first direction O1 and the second direction O2. In other embodiments, both may be vertical, as the invention is not limited in this regard.

Referring to fig. 2 and 3, the base 1 has a slot 1a opened along the first direction, and one end of the slot 1a along the first direction is open, and the other end is closed; the osteotomy plate 2 is provided with a clamping tooth 2a matched with the clamping groove 1a, the clamping tooth 2a is used for being clamped into the clamping groove 1a by the open end of the clamping groove 1a, and the closed end of the clamping groove 1a is used for abutting against the osteotomy plate 2; after the latch 2a is engaged with the latch 1a, the degree of freedom other than the first direction is restricted by the latch 1 a. Referring to fig. 4a to 4d, which show cross-sectional shapes of several kinds of teeth 2a, respectively, it will be understood that fig. 4a to 4d are merely exemplary of the teeth 2a and are not limiting of the shape of the teeth 2a, and in other embodiments, the teeth 2a may have other shapes. When the latch 2a of the osteotomy plate 2 is engaged with the latch 1a from the end where the latch 1a is open to abut against the end where the latch 1a is closed, that is, the osteotomy plate 2 is engaged to a predetermined depth.

Referring to fig. 2 in combination with fig. 1 and 9, optionally, the substrate 1 has a first elongated hole 1b, and a long axis of the first elongated hole 1b extends along the second direction; at least a part of the locking member 3 is movably inserted into the first elongated hole 1b in the second direction, and is restricted from moving in the short axis direction thereof by the first elongated hole 1b. The long axis of the first elongated hole 1b is the long axis of the cross section of the first elongated hole 1b along the axial direction thereof. Similarly, the minor axis of the first elongated hole 1b refers to the minor axis of the cross section of the first elongated hole 1b in the axial direction thereof, and hereinafter, the major axis and the minor axis of the second elongated hole 3c can be understood with reference thereto.

Further, the locking assembly 3 includes a guide member 3b, and the guide member 3b is configured to movably penetrate the first elongated hole 1b. The first elongated hole 1b is used for guiding the moving direction of the locking assembly 3 through the guide member 3b, preferably, the inner dimension of the short axis direction of the cross section of the first elongated hole 1b is matched with the outer dimension of the guide member 3b, so that the guide member 3b can only move along the long axis direction of the first elongated hole 1b after penetrating into the first elongated hole 1b, and the guide member 3b abuts against the first elongated hole 1b along the short axis direction of the first elongated hole 1b, thereby not moving along the short axis direction of the first elongated hole 1b. In an alternative example, the cross sections of the first elongated hole 1b and the guide member 3b are both oblong, and the short axis length of the guide member 3b is slightly smaller than the short axis length of the first elongated hole 1b, so that the guide member 3b can movably penetrate into the first elongated hole 1b; the length of the long axis of the guide member 3b is smaller than that of the first elongated hole 1b by the difference of L, so that the guide member 3b can move back and forth in the first elongated hole 1b along the second direction, and the maximum stroke of the back and forth movement is L.

Preferably, the locking assembly 3 comprises a push-button 3a, the push-button 3a being connected to the guide 3 b; the push button 3a has friction features, which may include, for example, protrusions or grooves, for increasing the friction resistance with the fingers of the operator when pushing, so that it is not prone to slipping during use. Wherein the protrusions or grooves may be in the form of particles, spheres, semi-circles, stripes, etc., which is not limited in this embodiment.

When the locking assembly 3 is in the first position, the pushing piece 3a is used for abutting against the osteotomy plate 2 to limit the osteotomy plate 2 to move along the first direction, so as to lock the relative positions of the osteotomy plate 2 and the matrix 1; when the locking assembly 3 is in the second position, the push button 3a releases the abutment with the osteotomy plate 2, allowing the osteotomy plate 2 to be moved in the first direction to withdraw from the base 1.

Referring to fig. 8 and 9, in an exemplary embodiment, after the latch 2a of the osteotomy plate 2 is engaged into the slot 1a, one side of the latch 2a along the first direction is flush with the side of the base 1, and after the pushing piece 3a moves to the first position, the pushing piece abuts against the side of the latch 2a to prevent the latch 2a from withdrawing from the base 1 along the first direction, so as to lock the relative positions of the osteotomy plate 2 and the base 1. When the push-push piece 3a moves to the second position, the push-push piece 3a moves to the right in fig. 9 by L distance, and the abutment with the latch 2a is released, so that the escape path of the latch 2a is avoided, and the osteotomy plate 2 is allowed to move in the first direction and escape from the base body 1. At this time, according to the operation requirement, different osteotomy plates 2 can be replaced, and then the newly replaced osteotomy plates 2 are locked again by the locking assembly 3.

Alternatively, referring to fig. 2 and 5, and referring to fig. 1 and 9, the base 1 has a pin hole 1c, the pin hole 1c is disposed at an angle to the first elongated hole 1b, and the pin hole 1c is in communication with the first elongated hole 1b; the guide 3b has a second elongated hole 3c, and a long axis of the second elongated hole 3c extends in the second direction; the osteotomy plate locking device comprises a pin shaft 6, the pin shaft 6 is simultaneously arranged through the pin hole 1c and the second strip hole 3c in a penetrating mode, and the pin shaft 6 limits the locking assembly 3 to move along the axial direction of the first strip hole 1b. The pin hole 1c and the first elongated hole 1b are disposed at an angle, which means that the pin hole and the first elongated hole are disposed at an angle in the axial direction. In a preferred example, the axial direction of the pin hole 1c is perpendicular to the axial direction of the first elongated hole 1b. Further, after the guide 3b is inserted into the first elongated hole 1b, the axial direction of the second elongated hole 3c is parallel to the axial direction of the pin hole 1c, and the second elongated hole 3c is aligned with the pin hole 1c, so that the pin shaft 6 can penetrate through both the pin hole 1c and the second elongated hole 3c. After the pin hole 1c passes through both the pin hole 1c and the second elongated hole 3c, the axial position of the guide 3b along the first elongated hole 1b is restricted so that the guide 3b can move only in the second direction, i.e., the long axis direction of the first elongated hole 1b, without coming out of the first elongated hole 1b.

Preferably, the osteotomy plate locking device further comprises a potential energy assembly; one end of the potential energy component is connected with the locking component 3, and the other end of the potential energy component is connected with the base body 1; when the locking assembly 3 is not subjected to external force, the locking assembly 3 is in the first position; the potential energy assembly is configured to store potential energy during movement of the locking assembly 3 from the first position to the second position; potential energy is released during movement of the locking assembly 3 from the second position to the first position. The potential energy assembly functions to maintain the locking assembly 3 in the first position when not subjected to external forces, thereby ensuring a consistent and reliable locking of the osteotomy plate 2 during surgery. On the other hand, when installing and replacing the osteotomy plate 2, the operator can easily accomplish unlocking of the osteotomy plate 2 by actuating the locking assembly 3. In the process, the potential energy component can store potential energy, after the bone cutting plate 2 is installed, an operator only needs to loose hands, and the potential energy component can automatically push the locking component 3 to the first position to complete locking by releasing the stored potential energy.

Referring to fig. 6 and 7 in combination with fig. 1 and 2, optionally, the potential energy assembly includes an elastic member 4 and a fixing member 5; the base body 1 is provided with a tail hole 1d which is formed along the second direction; the elastic piece 4 is arranged in the tail hole 1d in a penetrating way and is connected with the locking assembly 3; at least one part of the fixing piece 5 is penetrated in the tail hole 1d and is connected with the elastic piece 4; the fixing member 5 is restrained from axial displacement relative to the tail hole 1 d. It should be noted that the combination of the elastic member 4 and the fixing member 5 is only an example of a potential energy assembly and is not limited to the potential energy assembly, and in other embodiments, the potential energy assembly may store or release magnetic potential energy or gravitational potential energy, for example, two magnets with opposite poles, which generate repulsive force when they approach each other under the action of an external force to store potential energy, release potential energy when the external force is removed, and repel each other to be away from each other. As another example, the gravitational potential energy is stored or released by a weight, which can be understood and replaced by those skilled in the art in view of the prior art, and the present invention is not limited thereto.

In one example, the tail hole 1d has an internal thread, and the fixing member 5 has an external thread 5c adapted to the internal thread; the fixing piece 5 is in threaded connection with the tail hole 1 d. Optionally, the end of the fixing member 5 far from the elastic member 4 is provided with a force application feature 5b, such as a straight slot 5b, a cross slot, a quincuncial slot or a hexagon slot, etc., which can be inserted by a tool commonly used in the art to apply force for driving, so that the fixing member 5 can rotate under the driving of the tool. It should be understood that the threaded connection between the fixing element 5 and the tail hole 1d is only an exemplary connection between the two, and is not limited to the connection between the two, for example, in other embodiments, the fixing element 5 and the tail hole 1d may be connected by interference fit, glue joint, pin joint, or the like, which is common in the art.

Preferably, as shown in fig. 6, the elastic member 4 is a spring having two opposite end surfaces 4a, 4b perpendicular to the second direction, and the two end surfaces 4a, 4b are respectively abutted with the locking assembly 3 and the fixing member 5. The end of the fixing element 5 for abutting connection with the end face 4b has an abutment face 5a. Of course, in other embodiments, the elastic member 4 is not limited to a spring, but may be a spring element such as a reed or a disc spring.

Further, referring to fig. 5, the locking assembly 3 has a limiting groove 3d, and the limiting groove 3d is configured to be abutted against and connected with the elastic member 4. The limiting groove 3d is preferably parallel to the second direction, for example, may be a groove recessed in the guide member 3b, and the groove bottom is preferably a plane, and may be adapted to abut against one end surface 4a of the spring, and may limit the end surface 4a of the spring from sliding out of the groove.

An exemplary process and procedure for assembling and using the osteotomy plate locking device of the present embodiment will be described with reference to fig. 1 and 9.

The assembly process comprises the following steps: firstly, inserting a guide piece 3b of the locking assembly 3 into a first strip hole 1b of the base body 1, and penetrating a pin shaft 6 into a pin hole 1c until penetrating into a second strip hole 3c; and then the elastic piece 4 is penetrated from the tail hole 1d, and the fixing piece 5 is screwed into the tail hole 1d, so that the assembly is completed. The locking assembly 3 is now initially in the first position under the force of the resilient member 4.

The using steps are as follows: the locking component 3 is pushed to move to the second position, the clamping teeth 2a of the osteotomy plate 2 are inserted into the clamping grooves 1a of the base body 1, the locking component 3 is loosened, the locking component 3 returns to the first position under the elastic action of the elastic piece 4, and the osteotomy plate 2 is locked. Furthermore, the osteotomy plate 2 can be used as a guiding substrate of the osteotomy tool for osteotomy, and the specific osteotomy operation will be described in detail with reference to the prior art.

In summary, the locking device for osteotomy plate provided by the present invention includes: an osteotomy plate, a base, and a locking assembly; the osteotomy plate is detachably connected with the base body along a first direction; the locking assembly is movably connected with the base body along a second direction which is angled with respect to the first direction; the locking assembly moves in the second direction between a first position and a second position; locking the relative position of the osteotomy plate and the base when the locking assembly is in the first position; when the locking assembly is in the second position, the locking of the relative positions of the osteotomy plate and the base is released. So dispose, can lock the osteotomy plate on the base member through locking assembly, guaranteed that the osteotomy plate can not deviate from the base member in the use, improve the efficiency in the art, reduce user's injury risk.

It should be noted that the above embodiments may be combined with each other. The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.

Claims

1. An osteotomy plate locking device, comprising: an osteotomy plate, a base, and a locking assembly;

2. The osteotomy plate locking device of claim 1, wherein the base has a first elongate aperture having a major axis extending in the second direction;

3. The osteotomy plate locking device of claim 2, wherein the locking assembly includes a push-button having a friction feature and a guide member coupled to the push-button for movably threading through the first elongated aperture;

4. The osteotomy plate locking device of claim 3, wherein the base has a pin hole, the pin hole being angularly disposed with the first elongate hole and the pin hole being in communication with the first elongate hole; the guide has a second elongated hole, a long axis of which extends in the second direction;

5. The osteotomy plate locking device of claim 1, wherein the osteotomy plate locking device further comprises a potential energy assembly;

6. The osteotomy plate locking device of claim 5, wherein the potential energy assembly comprises an elastic member and a securing member;

7. The osteotomy plate locking device of claim 6, wherein the tail hole has internal threads and the fastener has external threads that mate with the internal threads; the fixing piece is in threaded connection with the tail hole.

8. The osteotomy plate locking device of claim 6, wherein the resilient member is a spring having opposite end faces perpendicular to the second direction, the end faces being in abutting connection with the locking assembly and the securing member, respectively.

9. The osteotomy plate locking device of claim 6, wherein the locking assembly has a limit groove for abutting connection with the resilient member.

10. The osteotomy plate locking device of claim 1, wherein the base has a slot open in the first direction, the slot open at one end and closed at the other end in the first direction; the bone cutting plate is provided with a clamping tooth matched with the clamping groove, the clamping tooth is used for being clamped into the clamping groove by the open end of the clamping groove, and the closed end of the clamping groove is used for propping against the bone cutting plate; after the clamping teeth are clamped into the clamping grooves, the freedom degrees except the first direction are limited by the clamping grooves.