CN216985104U - Anti-slip lumbar vertebra screw turning device - Google Patents

Abstract

The application relates to the field of medical equipment, in particular to an anti-slipping lumbar screw head regulator. An anti-slip lumbar screw head adjuster comprises an outer cylinder, an inner cylinder, a connecting column and a limiting structure; the axis of the outer cylinder body is superposed with the axis of the inner cylinder body, and the outer cylinder body is sleeved outside the inner cylinder body and is rotatably connected with the inner cylinder body; the inner cylinder body is used for sleeving the peripheral surface of the lumbar screw; wherein, the bulge part can be movably accommodated in the matching groove; the outer barrel is used for rotating for interior barrel under the effect of external force, and when the lateral wall butt of bellying and cooperation groove, the outer barrel is used for driving interior barrel and rotates and twist through the spliced pole and move the lumbar vertebrae screw, and a plurality of spring pins all are used for and are located the outer wall butt of the internal lumbar vertebrae screw of inner tube. This lumbar vertebrae screw turner is taken off in antiskid can play the tight effect of clamp to the lumbar vertebrae screw that is located the inner tube body to can improve the connection stability of screw and turner, in order to avoid the turner to break away from the screw.

Description

Anti-slip lumbar vertebra screw turning device

Technical Field

The application relates to the field of medical equipment, in particular to an anti-slipping lumbar screw head regulator.

Background

Currently, surgical treatment of spinal disorders includes correction, fusion, fixation, discectomy, spinal resection, and implantable prostheses. As part of these surgical treatments, spinal constructs such as vertebral rods are often used to provide stability to the treatment area.

The spinal nail rod internal fixation system is a well-established spinal surgery in the aspect of treating spinal injuries and diseases, and is widely applied to reduction and fixation of bones. Generally, a fastener such as a pedicle screw is implanted and fixed to a vertebral body, and is connected through a connecting rod and then fixed by a set screw to play a supporting role.

However, when the screw is implanted, the screw is not firmly connected with the head regulator, and the head regulator is easy to separate from the screw.

SUMMERY OF THE UTILITY MODEL

The application provides a lumbar vertebrae screw turner is taken off in antiskid to improve above-mentioned problem.

The utility model is particularly such that:

an anti-slip lumbar screw head adjuster comprises an outer cylinder, an inner cylinder, a connecting column and a limiting structure;

the axis of the outer cylinder body is superposed with the axis of the inner cylinder body, and the outer cylinder body is sleeved outside the inner cylinder body and is rotatably connected with the inner cylinder body; the inner cylinder body is used for sleeving the peripheral surface of the lumbar screw; the connecting column is accommodated in the inner cylinder body and is connected with the inner wall of the inner cylinder body, and the connecting column is used for being matched with a tail groove of a lumbar screw accommodated in the inner cylinder body; the limiting structure comprises a matching groove arranged on the inner wall of the outer cylinder, a protruding part arranged on the outer wall of the inner cylinder and a plurality of spring pins;

wherein, the convex part can be movably accommodated in the matching groove; outer barrel is used for barrel rotation in relative to under the effect of external force, and when the lateral wall butt of bellying and cooperation groove, barrel rotation and twist through the spliced pole and move the lumbar vertebrae screw in outer barrel is used for driving, and a plurality of spring pins all are used for with the outer wall butt that is located the internal lumbar vertebrae screw of inner tube.

In the embodiment of the utility model, each spring pin comprises a body and a movable pin head, the bodies are connected with the outer cylinder, and the movable pin heads have the tendency of moving towards the direction close to the inner cylinder relative to the outer cylinder.

In the embodiment of the utility model, the limiting structure further comprises a plurality of limiting holes penetrating through the wall of the inner cylinder body;

when the bulge is abutted against the side wall of the matching groove, the movable pin heads of the plurality of spring pins are matched with the plurality of limiting holes in a one-to-one correspondence manner, and the parts of the movable pin heads of the spring pins are positioned in the inner cylinder body so as to be abutted against the outer wall of the lumbar vertebra screw positioned in the inner cylinder body, thereby clamping the lumbar vertebra screw.

In the embodiment of the utility model, a plurality of spring pins are distributed on two sides of the matching groove around the axial direction of the outer cylinder body.

In the embodiment of the utility model, the anti-slipping lumbar screw head regulator comprises a plurality of first spring pins and a plurality of second spring pins, and the inner cylinder body comprises a plurality of first limiting holes and a plurality of second limiting holes;

when the outer cylinder body rotates around the first direction relative to the inner cylinder body, the plurality of first spring pins are matched with the plurality of first limiting holes in a one-to-one corresponding mode; when the outer cylinder body rotates around the second direction relative to the inner cylinder body, the plurality of second spring pins are matched with the plurality of second limiting holes in a one-to-one correspondence manner;

wherein the first direction is opposite to the second direction.

In the embodiment of the utility model, the plurality of first spring pins and the plurality of second spring pins are sequentially arranged at intervals around the axial direction of the outer cylinder body, and the plurality of first spring pins and the plurality of second spring pins are distributed in a staggered manner.

In the embodiment of the utility model, a central angle formed by any one first spring pin and the adjacent second spring pin and the central axis of the outer cylinder body is a first central angle;

a central angle formed by the two side walls of the matching groove and the central axis of the outer cylinder body is a second central angle;

wherein the first central angle is the same as the second central angle.

In an embodiment of the utility model, the protrusion is clearance-fitted with the fitting groove.

In an embodiment of the present invention, the outer cylinder includes a first end and a second end disposed along an axial direction thereof;

the first end is provided with an annular limiting table which is used for being abutted against an inner cylinder body positioned in the outer cylinder body so as to limit the movement of the inner cylinder body along the direction of separating from the outer cylinder body;

the second end is provided with a connecting thread for connecting the handle.

The beneficial effects of the utility model are:

the anti-slipping lumbar screw head regulator comprises an outer cylinder, an inner cylinder, a connecting column and a limiting structure; in the using process, the anti-slipping lumbar screw turning device enables the outer barrel and the inner barrel to move relatively by rotating the outer barrel, further enables the matching groove in the outer barrel to move relative to the boss of the inner barrel, and further drives the inner barrel to rotate and screws the lumbar screw through the connecting column when the boss is abutted against the side wall of the matching groove; and at this in-process, a plurality of spring pins all be used for with the outer wall butt that is located the internal lumbar vertebrae screw of inner tube, and then can play the tight effect of clamp to the lumbar vertebrae screw that is located the inner tube to can improve the stability of being connected of screw and turning round ware, in order to avoid the turning round ware to break away from the screw.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Figure 1 is a cross-sectional view of a first perspective of the anti-slip lumbar screw head adjuster provided herein;

FIG. 2 is a partial schematic view of FIG. 1 at A;

fig. 3 is a schematic structural view of the anti-slipping lumbar screw head adjuster provided by the present application from a second perspective;

figure 4 is a cross-sectional view of a second perspective of the anti-slip lumbar screw head aligner provided by the present application.

Icon: 200-anti-slip lumbar screw head adjuster; 210-an outer cylinder; 220-inner cylinder; 230-connecting column; 40-a limiting structure; 241-fitting groove; 242-a boss; 243-spring pin; 244-a limiting hole; 211-annular stop table; 212-connecting screw thread.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

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 further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1-4, the present invention provides an anti-slipping lumbar screw head adjuster 200, which comprises an outer cylinder 210, an inner cylinder 220, a connecting column 230 and a limiting structure 40;

the axis of the outer cylinder 210 coincides with the axis of the inner cylinder 220, and the outer cylinder 210 is sleeved outside the inner cylinder 220 and rotatably connected with the inner cylinder 220; the inner cylinder 220 is used for sleeving the peripheral surface of the lumbar screw; the connection column 230 is accommodated in the inner cylinder 220 and connected with the inner wall of the inner cylinder 220, and the connection column 230 is used for matching with a tail groove of a lumbar screw accommodated in the inner cylinder 220; the limiting structure 40 includes a fitting groove 241 provided on the inner wall of the outer cylinder 210, a protruding part 242 provided on the outer wall of the inner cylinder 220, and a plurality of spring pins 243;

wherein, the protrusion 242 is movably received in the fitting groove 241; outer barrel 210 is used for rotating for interior barrel 220 under the effect of external force, and when the lateral wall butt of bellying 242 and cooperation groove 241, outer barrel 210 is used for driving interior barrel 220 and rotates and twist the lumbar vertebrae screw through spliced pole 230, and a plurality of spring pins 243 all are used for with the outer wall butt that is located the lumbar vertebrae screw of interior barrel 220.

In this embodiment, first, the lumbar screw includes a screw provided with a threaded portion and a head provided with a tail groove; the tail groove can be a U-shaped groove, and the connecting column 230 has a shape adapted to the tail groove, so that when the connecting column 230 is matched with the tail groove, the outer cylinder 210 drives the inner cylinder 220 to rotate, thereby driving the lumbar screw to rotate; next, when the inner cylinder 220 is installed, the inner cylinder 220 needs to be engaged with the lumbar screw, so that the inner cylinder 220 has a shape corresponding to the tail of the lumbar screw.

The working principle of the anti-slipping lumbar screw head adjuster 200 is as follows:

referring to fig. 1-4, the anti-slipping lumbar screw head adjuster 200 includes an outer cylinder 210, an inner cylinder 220, a connecting column 230 and a limiting structure 40; in the using process, the anti-slipping lumbar screw head adjuster 200 rotates the outer cylinder 210, so that relative motion exists between the outer cylinder 210 and the inner cylinder 220, the matching groove 241 on the outer cylinder 210 can move relative to the protruding part 242 of the inner cylinder 220, and the inner cylinder 220 can be driven to rotate and the lumbar screws can be screwed through the connecting column 230 when the protruding part 242 abuts against the side wall of the matching groove 241; and in this process, a plurality of spring pins 243 all are used for with the outer wall butt that is located the lumbar vertebrae screw of barrel 220 in, and then can play the tight effect of clamp to the lumbar vertebrae screw that is located barrel 220 in to can improve the stability of being connected of screw and turning round ware, in order to avoid the turning round ware to break away from the screw.

Further, referring to fig. 1-4, in the present embodiment, when the plurality of spring pins 243 are disposed, each of the plurality of spring pins 243 includes a body and a movable pin head. It should be noted that each spring pin 243 further includes an elastic member, the elastic member is located in the main body, the main body is connected to the outer cylinder 210, and the movable pin head has a tendency to move toward the inner cylinder 220 relative to the outer cylinder 210 under the action of the elastic member.

Further, referring to fig. 1-4, in the present embodiment, the limiting structure 40 further includes a plurality of limiting holes 244 penetrating the wall of the inner cylinder 220; when the protruding portion 242 abuts against the side wall of the fitting groove 241, the movable pin heads of the plurality of spring pins 243 are fitted with the plurality of limiting holes 244 in a one-to-one correspondence manner, and the movable pin heads of the spring pins 243 are partially located in the inner cylinder 220 so as to abut against the outer wall of the lumbar screw located in the inner cylinder 220, thereby clamping the lumbar screw. Therefore, when the protruding portion 242 is not abutted to the side wall of the fitting groove 241, the movable pin heads of the plurality of spring pins 243 are abutted to the outer wall of the inner cylinder 220, and when the outer cylinder 210 rotates relative to the inner cylinder 220 under the action of external force, the plurality of spring pins 243 are driven to move relative to the inner cylinder 220, so that the movable pin heads of the plurality of spring pins 243 are fitted with the plurality of limiting holes 244 in a one-to-one correspondence manner. In this process, when the movable pin heads of the spring pins 243 are correspondingly engaged with the limiting holes 244, the outer wall of the lumbar screw in the inner cylinder 220 is abutted to the outer wall of the lumbar screw because the movable pin heads are partially located in the inner cylinder 220, thereby playing a role of clamping the lumbar screw.

And since the plurality of spring pins 243 are all distributed at both sides of the fitting groove 241 around the axial direction of the outer cylinder 210. Therefore, the outer walls of the lumbar screws positioned in the inner cylinder 220 can be clamped by the plurality of spring pins 243 at intervals in sequence around the axial direction of the outer cylinder 210, so that clamping force uniformly distributed around the outer circumferential surface of the lumbar screws can be formed, and the lumbar screws can be effectively clamped. In the present embodiment, the side walls of the fitting groove 241 for abutting against the protruding portion 242 are the side walls of the fitting groove 241 located on both sides of the protruding portion 242.

Further, referring to fig. 1-4, in the present embodiment, in the using process, the outer cylinder 210 is used to drive the inner cylinder 220 to rotate in the clockwise direction or the counterclockwise direction, so that the anti-slipping lumbar screw head adjuster 200 includes a plurality of first spring pins 243 and a plurality of second spring pins 243, and the inner cylinder 220 includes a plurality of first limiting holes 244 and a plurality of second limiting holes 244; when the outer cylinder 210 rotates around the first direction relative to the inner cylinder 220, the first spring pins 243 are correspondingly engaged with the first limiting holes 244 one by one; when the outer cylinder 210 rotates around the second direction relative to the inner cylinder 220, the plurality of second spring pins 243 are correspondingly matched with the plurality of second limiting holes 244 one by one; the first direction is opposite to the second direction, and the first direction may be a clockwise direction or a counterclockwise direction, and the first direction may be a counterclockwise direction or a clockwise direction.

In addition, in order to improve the stability of clamping the lumbar screw, the plurality of first spring pins 243 and the plurality of second spring pins 243 are sequentially spaced around the axial direction of the outer cylinder 210, and the plurality of first spring pins 243 and the plurality of second spring pins 243 are distributed in a staggered manner.

Further, referring to fig. 1 to 4, in the present embodiment, in order to enable the protrusion 242 to move relative to the fitting groove 241, the protrusion 242 is in clearance fit with the fitting groove 241, and the protrusion 242 is not able to trigger the plurality of first spring pins 243 and the plurality of second spring pins 243 to operate when abutting against two side walls of the fitting groove 241, so that a central angle formed by any one first spring pin 243 and an adjacent second spring pin 243 and a central axis of the outer cylinder 210 is a first central angle; a central angle formed by the two side walls of the fitting groove 241 and the central axis of the outer cylinder 210 is a second central angle; wherein the first central angle is the same as the second central angle. Thus, when the protrusions do not abut against the two side walls of the fitting groove 241, the movable pin heads of the first and second spring pins 243 and 243 are both accommodated in the main body and abut against the outer wall of the inner cylinder 220.

Further, referring to fig. 1-4, in order to facilitate the connection of the anti-slipping lumbar screw head adjuster 200 with the handle and to enable the outer cylinder 210 to be matched with the inner cylinder 220, the outer cylinder 210 includes a first end and a second end arranged along the axial direction thereof; the first end is provided with an annular limiting table 211, and the annular limiting table 211 is used for abutting against the inner cylinder 220 positioned in the outer cylinder 210 so as to limit the movement of the inner cylinder 220 along the direction of separating from the outer cylinder 210; the second end is provided with a connecting thread 212 for connecting the handle.

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

Claims (9)

1. The utility model provides a lumbar vertebrae screw turner is taken off in antiskid which characterized in that:

the anti-slip lumbar screw head regulator comprises an outer cylinder, an inner cylinder, a connecting column and a limiting structure;

the axis of the outer cylinder body is superposed with the axis of the inner cylinder body, and the outer cylinder body is sleeved outside the inner cylinder body and is rotatably connected with the inner cylinder body; the inner cylinder body is used for being sleeved on the peripheral surface of the lumbar screw; the connecting column is accommodated in the inner cylinder body and is connected with the inner wall of the inner cylinder body, and the connecting column is used for being matched with a tail groove of the lumbar vertebra screw accommodated in the inner cylinder body; the limiting structure comprises a matching groove arranged on the inner wall of the outer cylinder, a protruding part arranged on the outer wall of the inner cylinder and a plurality of spring pins;

the lug boss is movably accommodated in the matching groove; outer barrel be used for under the effect of external force for interior barrel rotates the bellying with during the lateral wall butt of cooperation groove, outer barrel is used for driving interior barrel rotates and passes through the spliced pole is twisted and is moved the lumbar vertebrae screw, and is a plurality of the spring catch all be used for with be located in the inner tube the outer wall butt of lumbar vertebrae screw.

2. The anti-slip lumbar screw head aligner according to claim 1, characterized in that:

the spring pins comprise bodies and movable pin heads, the bodies are connected with the outer cylinder, and the movable pin heads have the trend of moving towards the direction close to the inner cylinder relative to the outer cylinder.

3. The anti-slip lumbar screw head adjuster according to claim 2, characterized in that:

the limiting structure also comprises a plurality of limiting holes penetrating through the cylinder wall of the inner cylinder body;

work as the bellying with during the lateral wall butt of cooperation groove, it is a plurality of the activity round pin head of spring catch is with a plurality of spacing hole one-to-one cooperation, just the part of the activity round pin head of spring catch is located in the inner tube is internal, with be located in the inner tube is internal the outer wall butt of lumbar vertebrae screw, thereby presss from both sides tightly the lumbar vertebrae screw.

4. The anti-slip lumbar screw head adjuster according to claim 3, characterized in that:

the spring pins are distributed on two sides of the matching groove in the axial direction of the outer cylinder body.

5. The anti-slip lumbar screw head adjuster according to claim 4, wherein:

the anti-slipping lumbar screw head regulator comprises a plurality of first spring pins and a plurality of second spring pins, and the inner cylinder body comprises a plurality of first limiting holes and a plurality of second limiting holes;

when the outer cylinder body rotates around a first direction relative to the inner cylinder body, the first spring pins are matched with the first limiting holes in a one-to-one corresponding mode; when the outer cylinder body rotates around a second direction relative to the inner cylinder body, the plurality of second spring pins are matched with the plurality of second limiting holes in a one-to-one corresponding mode;

wherein the first direction is opposite to the second direction.

6. The anti-slip lumbar screw head adjuster according to claim 5, wherein:

a plurality of first spring catch and a plurality of second spring catch all winds the axis direction of outer barrel sets up at interval in proper order, and is a plurality of first spring catch and a plurality of second spring catch staggered distribution.

7. The anti-slip lumbar screw head adjuster according to claim 6, wherein:

a central angle formed by any one first spring pin, the adjacent second spring pin and the central axis of the outer cylinder body is a first central angle;

a central angle formed by the two side walls of the matching groove and the central axis of the outer cylinder body is a second central angle;

wherein the first central angle is the same as the second central angle.

8. The anti-slip lumbar screw upender as set forth in any one of claims 1-7, characterized in that:

the protruding part is in clearance fit with the matching groove.

9. The anti-slip lumbar screw upender as set forth in any one of claims 1-7, characterized in that:

the outer cylinder body comprises a first end and a second end which are arranged along the axial direction of the outer cylinder body;

the first end is provided with an annular limiting table which is used for being abutted against the inner cylinder body positioned in the outer cylinder body so as to limit the movement of the inner cylinder body along the direction of separating from the outer cylinder body;

and the second end is provided with a connecting thread for connecting the handle.

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