CN219166596U

CN219166596U - Bone fixing device

Info

Publication number: CN219166596U
Application number: CN202223288891.4U
Authority: CN
Inventors: 郝田青; 陈圣
Original assignee: Suzhou Minimally Invasive Spinal Trauma Medical Technology Co ltd
Current assignee: Suzhou Minimally Invasive Spinal Trauma Medical Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-13
Anticipated expiration: 2032-12-08

Abstract

The present utility model provides a bone fixation device. The device comprises a bearing piece, a fixing piece and a locking piece; the bearing piece is provided with a guide part, one end of the fixing piece penetrates through the guide part, and the fixing piece is used for connecting the bearing piece and a fixed object; the locking piece is movably arranged on the bearing piece, and the locking piece is used for limiting the relative movement between the other end of the fixing piece and the bearing piece. According to the bone fixing device, the fixing piece moves along the direction limited by the guide part due to the limitation of the guide part, and the locking piece is overlapped or partially overlapped with the fixing piece by moving the locking piece to the guide part, so that the fixing piece can be limited to loose and fall off, the stability of the fixing effect of the fixing device is improved, and the problems that the fixing piece is easy to fall off and the fixing is inaccurate in the prior art are solved.

Description

Bone fixing device

Technical Field

The utility model relates to the technical field of medical auxiliary equipment, in particular to a bone fixing device.

Background

With the continuous development of clinical science and technology, a chest and waist plate fixing system for treating chest and waist column injuries, tumors, intervertebral disc degenerative diseases, anterior fusion with multiple posterior fusion operation failures, diseases including pseudoarthropathy and the like is widely accepted by surgeons, and the curative effect is also well known.

The anterior board system of prior art usually uses titanium board, screw to fix, because the anti extraction force of screw is poor, has the risk of screw extraction after the operation, easily causes not hard up drop phenomenon to take place. Moreover, because the gap between the screw and the titanium plate is larger in the prior art, the screw is often deviated from the expected direction when being fixed, so that a patient is easy to be injured, and the healing is slower.

It is therefore desirable to design a bone fixation device that is resistant to falling out and accurate in fixation.

Disclosure of Invention

The utility model aims to provide a bone fixing device which is used for solving the problems that screws are easy to fall off and the fixing is inaccurate in the prior art.

In order to achieve the above object, the present utility model provides a bone fixation device, comprising a carrier, a fixing member and a locking member;

the bearing piece is provided with a guide part, one end of the fixing piece penetrates through the guide part, and the fixing piece is used for connecting the bearing piece and a fixed object; the locking piece is arranged on the bearing piece and used for limiting the relative movement between the other end of the fixing piece and the bearing piece.

The bone fixing device has the beneficial effects that: the fixing piece is enabled to move along the direction limited by the guide part through the limitation of the guide part, and the locking piece is enabled to overlap or partially overlap with the fixing piece through the movement of the locking piece to the guide part, so that the fixing piece can be limited to be loose and fall off, the stability of the fixing effect of the fixing device is improved, and the problems that the fixing piece is easy to fall off and is inaccurate in fixing in the prior art are solved.

In a possible embodiment, the guide portion includes a first guide hole and a second guide hole; the first guide hole and the second guide hole penetrate through the bearing piece, the straight line of the first guide hole axis mapped in the plane intersects with the straight line of the second guide hole axis mapped in the plane, the fixing pieces are arranged at least two, and at least one fixing piece is arranged in each of the first guide hole and the second guide hole. The beneficial effects are that: through first guiding hole with the second guiding hole maps and sets up in the straight line intersection of coplanar for at least two form the contained angle between the mounting, and make at least two form clamping force between the mounting, can promote fixed effect.

In a possible embodiment, the first guide hole and the second guide hole are each provided in two. The beneficial effects are that: the fixing device can form at least four fixing modes, so that the fixing symmetry and the fixing effect are improved.

In a possible embodiment, the fixture comprises a first section, a second section and a third section; the first section portion, the second section portion and the third section portion are connected end to end in sequence and coaxially arranged, the outer diameter of the first section portion is larger than the inner diameter of the guiding portion, threads are arranged on the second section portion and the third section portion, and the number of threads of the second section portion is larger than the number of threads of the third section portion. The beneficial effects are that: after the fixing member is fixed to the fixed object, the fixing member is brought into abutment with the carrier by the first stage portion, and the fixing member and the fixed object are brought into fastening force by the second stage portion and the third stage portion, so that the carrier and the fixed object are fixed together. The number of threads of the second section is larger than that of threads of the third section, and the third section is contacted with the fixed object before the second section when in use, so that the difficulty of fixing the fixing piece can be reduced, and the use is convenient.

In a possible embodiment, the thread of the second section is a double thread and the thread of the third section is a single thread. The beneficial effects are that: the arrangement is such that, on the one hand, the number of threads of the second section is greater than the number of threads of the third section, and, on the other hand, by controlling the number of threads of the second section and the third section, the pitch of the second section and the third section can be made sufficiently great when the holder length is within a certain value.

In a possible embodiment, one of the threads of the third section is an extension of one of the threads of the second section. The beneficial effects are that: the setting can reduce the wound of mounting to fixed object when using like this, and can reduce the screw in degree of difficulty of mounting.

In a possible embodiment, the major diameter of the thread of the second section is greater than or equal to the major diameter of the thread of the third section; and/or the minor diameter of the thread of the second section is larger than or equal to the minor diameter of the thread of the third section. The beneficial effects are that: because the third section part contacts the fixed object before the second section part, the large diameter and the small diameter of the second section part and the third section part are arranged, the screwing difficulty of the fixing piece can be reduced, and the fixing piece is convenient to use.

In a possible embodiment, the fixture further comprises a fourth segment; the fourth section portion set up in the third section portion keep away from one side of second section portion, the fourth section portion with the coaxial setting of third section portion, the fourth section portion is equipped with the screw thread. The beneficial effects are that: through setting up the fourth section portion for the fourth section portion earlier the third section portion with fixed object contacts, can place each section portion in fixed object's different positions when using, is convenient for realize the two cortex fixed to target object.

In a possible embodiment, the major diameter of the thread of the fourth segment is smaller than or equal to the minor diameter of the thread of the third segment. The beneficial effects are that: this arrangement can prevent the clearance formed during the screwing of the fourth segment from affecting the fixation of the second segment and the third segment.

In a possible embodiment, the first segment comprises a first sub-segment and a second sub-segment; the second subsection part is connected with the second section part, the first subsection part is arranged on one side, far away from the second section part, of the second subsection part, and the second subsection part is arranged to be a spherical surface. The beneficial effects are that: the first subsection part is convenient for the fixing piece to be matched with an external fixing tool, so that the fixing piece is fixed, and the second subsection part is arranged to be spherical and is convenient for the second subsection part to be abutted with the bearing piece.

Drawings

FIG. 1 is a schematic view showing a structure of a bone fixation device according to a first embodiment of the present utility model;

FIG. 2 is a schematic structural view of a fixing member according to a second embodiment of the present utility model;

FIG. 3 is a schematic view showing a fixing state of a bone fixing device and a fixing object according to a second embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a bone fixation device according to a third embodiment of the present utility model;

fig. 5 is a schematic view showing a structure of a bone fixation device according to a fourth embodiment of the present utility model;

fig. 6 is a partial schematic elevational view of a bone fixation device according to a fourth embodiment of the present utility model.

Reference numerals in the drawings:

1. a carrier; 101. a guide part; 102. a first guide hole; 103. a second guide hole;

2. a fixing member; 201. a first segment; 202. a second segment; 203. a third section; 204. a fourth segment; 205. a first subsection; 206. a second sub-segment; 207. a third subsection;

3. and a locking piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. As used herein, the word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items.

In view of the problems with the prior art, embodiments of the present utility model provide a bone fixation device.

Fig. 1 is a schematic structural view of a bone fixation device according to a first embodiment of the present utility model, fig. 2 is a schematic structural view of a fixing member according to a second embodiment of the present utility model, fig. 3 is a schematic structural view of a fixation device according to a second embodiment of the present utility model and a fixation object, fig. 4 is a schematic sectional structural view of a bone fixation device according to a third embodiment of the present utility model, fig. 5 is a schematic structural view of a bone fixation device according to a fourth embodiment of the present utility model, and fig. 6 is a schematic partial structural elevation of a bone fixation device according to a fourth embodiment of the present utility model.

In some embodiments of the present utility model, referring to fig. 1 to 6, the bone fixation device includes a carrier 1, a fixation member 2, and a locking member 3; the bearing piece 1 is provided with a guide part 101, one end of the fixing piece 2 passes through the guide part 101, and the fixing piece 2 is used for connecting the bearing piece 1 and a fixed object; the locking piece 3 is movably arranged on the bearing piece 1, and the locking piece 3 is used for limiting the relative movement between the other end of the fixing piece 2 and the bearing piece 1.

In some embodiments of the present utility model, the carrier 1 is a plate structure with a radian, the fixing member 2 is a self-tapping bolt, and the locking member 3 is a sheet structure. The guide part 101 is a through hole formed in the support member, an outer diameter of one end of the carrier 1 is smaller than an inner diameter of the guide part 101, and a large diameter of the other end of the carrier 1 is smaller than the inner diameter of the guide part 101. The locking piece 3 is rotatably arranged on the supporting piece, when the locking piece 3 rotates to be not overlapped with the guide part 101, one end of the fixing piece 2 can pass through the guide part 101, and at the moment, the fixing piece 2 can adjust the position in the guide part 101 in a reciprocating manner; when the locking member 3 rotates to be overlapped with the guide portion 101, the other end of the fixing member 2 is affected by the locking member 3, so that the larger end of the fixing member 2 cannot move from the side of the locking member 3 away from the guide portion 101 to the guide portion 101, or the larger end of the fixing member 2 cannot move from the guide portion 101 to the side of the locking member 3 away from the guide portion 101, that is, the fixing member 2 is arranged in the guide portion 101 or outside the guide portion 101 by the locking member 3. In order to avoid the loosening or falling-off of the fixing member 2 and the carrier 1, the locking member 3 engages the other end of the fixing member 2 in the space of the guiding portion 101.

In some embodiments, the fixing member 2 is screwed onto a fixing object in use, and the bearing member 1 is abutted against the fixing object by the action of the larger end of the fixing member 2, so as to realize connection between the fixing object and the bearing member 1.

In some embodiments, the guide portion 101 is configured as a bar-shaped hole, in which two fixing members 2 are disposed, and the two fixing members 2 are respectively fixed to different positions of the fixation object, and the fractured or diseased bone is connected by the two fixing members 2.

In some embodiments, the diameter of the guiding portion 101 is equal to or slightly larger than the outer diameter of the smaller end of the fixing member 2, so that the guiding portion 101 limits the moving direction of the fixing member 2, and avoids the fixing member 2 from being deviated from the direction defined by the guiding portion 101.

In some embodiments, the locking piece is rotatably disposed on the carrier 1 by riveting.

In some embodiments, the carrier 1 is disposed vertically and in a front-rear direction, the guide portion 101 penetrates the carrier 1 from left to right, the locking member 3 is disposed on a left side surface of the carrier 1, and the fixing member 2 is disposed on the guide portion 101 in a left-to-right direction.

In some embodiments, the guide 101 is disposed obliquely to the carrier 1.

In some embodiments, the locking member 3 is rotatably disposed on the carrier member 1 in an interference fit.

In some embodiments, the locking member 3 is configured to move and limit the relative movement between the other end of the fixing member 2 and the carrier member 1 includes: when one end of the fixing member 2 abuts against the guiding portion 101, the locking member 3 is moved to partially overlap with the position of the guiding portion 101, if the locking member 3 abuts against the fixing member 2 at this time, the locking member 3 can limit the relative movement between the other end of the fixing member 2 and the carrier 1, and if a gap is left between the locking member 3 and the fixing member 2 at this time, the locking member 3 can limit the relative movement distance between the other end of the fixing member 2 and the carrier 1, and the distance is greater than zero and less than or equal to the length of the gap.

In some embodiments of the present utility model, referring to fig. 1 to 6, the guide part 101 includes a first guide hole 102 and a second guide hole 103; the first guide hole 102 and the second guide hole 103 penetrate through the bearing piece 1, and a straight line of the axis of the first guide hole 102 mapped in a plane intersects with a straight line of the axis of the second guide hole 103 mapped in the plane; the number of the fixing pieces 2 is at least two, and at least one fixing piece 2 is arranged in each of the first guide hole 102 and the second guide hole 103.

In some embodiments of the present utility model, the first guide hole 102 and the second guide hole 103 are both provided in a circular hole shape, the first guide hole 102 is inclined downward and rightward in a vertical plane, the second guide hole 103 is inclined upward and rightward in a vertical plane, two fixing members 2 are provided, and two fixing members 2 are respectively provided in the first guide hole 102 and the second guide hole 103.

In some embodiments, the first guide hole 102 and the second guide hole 103 are counter sunk holes.

In some embodiments, the acute angle between the axis of the first guiding hole 102 and the horizontal line is greater than or equal to 10 ° and less than or equal to 40 °.

In some embodiments, the acute angle between the axis of the second guiding hole 103 and the horizontal line is greater than or equal to 10 ° and less than or equal to 40 °.

In some embodiments, the first guide hole 102 and the second guide hole 103 are each provided as a bar-shaped hole or a kidney-shaped hole, and two fixing members 2 are disposed in each of the first guide hole 102 and the second guide hole 103.

In some embodiments, the number of the first guide holes 102 and the second guide holes 103 is two, the four guide holes are distributed in a rectangular or square shape, the number of the fixing pieces 2 is four, and the four fixing pieces 2 are respectively arranged in the four guide holes.

In some embodiments of the present utility model, referring to fig. 1 to 6, the fixing member 2 includes a first section 201, a second section 202, and a third section 203; the first section 201, the second section 202 and the third section 203 are connected end to end in sequence and coaxially arranged, the outer diameter of the first section 201 is larger than the inner diameter of the guiding portion 101, the second section 202 and the third section 203 are provided with threads, and the number of threads of the second section 202 is larger than the number of threads of the third section 203.

In some embodiments of the present utility model, a right side end of the first section 201 is provided with a regular hexagonal protrusion or a regular hexagonal groove, the second section 202 is fixedly connected to a right side of the first section 201, the third section 203 is fixedly connected to a right side of the second section 202, an outer diameter of the first section 201 is larger than an inner diameter of the guiding portion 101, outer diameters of the second section 202 and the third section 203 are not larger than the inner diameter of the guiding portion 101, a thread of the second section 202 is a double-thread, and a thread of the third section 203 is a single-thread.

In some embodiments, the second section 202 is a three-wire thread and the third section 203 is a single-wire thread.

In some embodiments, the thread in the thread of the third section 203 is an extension of one of the threads of the second section 202.

In some embodiments, the second section 202 is a three-wire thread and the third section 203 is a two-wire thread.

In some embodiments, one of the threads of the third section 203 is an extension of one of the threads of the second section 202, and the other thread is not an extension of the threads of the second section 202.

In some embodiments, the second segment 202 is fixed to the cortical bone of the fixation object and the third segment 203 is fixed to the cancellous bone of the fixation object.

In some embodiments of the present utility model, referring to fig. 1 to 6, the major diameter of the thread of the second section 202 is greater than or equal to the major diameter of the thread of the third section 203; and/or, the minor diameter of the second section 202 is greater than or equal to the minor diameter of the third section 203.

In some embodiments of the present utility model, the major diameter of the second section 202 is equal to the major diameter of the third section 203, and the minor diameter of the second section 202 is equal to the minor diameter of the third section 203.

In some embodiments, the major diameter of the second section 202 is the outer diameter of the second section thread, the minor diameter of the second section 202 is the inner diameter of the second section thread, the major diameter of the third section 203 is the same as the major diameter of the second section 202, and the minor diameter of the third section 203 is the same as the minor diameter of the second section 202. In some other embodiments, the outer diameter of the thread may also be referred to as the maximum diameter of the thread and the inner diameter of the thread may also be referred to as the minimum diameter of the thread.

In some embodiments, the major diameter of the second section 202 is greater than the major diameter of the third section 203.

In some embodiments, the minor diameter of the second segment 202 is greater than the minor diameter of the third segment 203.

In some embodiments of the present utility model, referring to fig. 1 to 6, the fixing member 2 further includes a fourth segment 204; the fourth section 204 is disposed on a side of the third section 203 away from the second section 202, the fourth section 204 is disposed coaxially with the third section 203, and the fourth section 204 is provided with threads.

In some embodiments of the present utility model, the fourth section 204 is disposed on the right side of the third section 203, the fourth section 204 is disposed coaxially with the third section 203, and a double-thread is disposed on an outer side surface of the fourth section 204.

In some embodiments, the second segment 202 is fixed to the cortical bone of the fixation object, the third segment 203 is fixed to the cancellous bone of the fixation object, and the fourth segment 204 is fixed to the cortical bone of the fixation object.

In some embodiments of the present utility model, referring to fig. 1 to 6, the major diameter of the thread of the fourth segment 204 is smaller than or equal to the minor diameter of the thread of the third segment 203.

In some embodiments of the present utility model, the major diameter of the thread of the fourth section 204 is equal to the minor diameter of the thread of the third section 203.

In some embodiments, the major diameter of the thread of the fourth segment 204 is smaller than the minor diameter of the thread of the third segment 203.

In some embodiments of the present utility model, referring to fig. 1 to 6, the first segment 201 includes a first subsection 205 and a second subsection 206; the second subsection 206 is connected to the second subsection 202, the first subsection 205 is disposed on a side of the second subsection 206 away from the second subsection 202, and the second subsection 206 is formed as a spherical surface.

In some embodiments of the present utility model, the second subsection 206 is fixedly connected to the left end of the second subsection 202, the first subsection 205 is fixedly connected to the left side of the second subsection 206, the first subsection 205 is provided with an inner hexagonal groove, and the outer side of the second subsection 206 is spherical.

In some embodiments, the groove of the one sub-section extends through the first sub-section 205 and to the second sub-section 206.

In some embodiments, the first segment 201 further includes a third sub-segment 207, the third sub-segment 207 being disposed between the second sub-segment 206 and the second segment 202, the third sub-segment 207 being configured in a cylindrical shape.

While embodiments of the present utility model have been described in detail hereinabove, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. It is to be understood that such modifications and variations are within the scope and spirit of the present utility model as set forth in the following claims. Moreover, the utility model described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. A bone fixation device, which is characterized by comprising a bearing piece, a fixing piece and a locking piece;

the bearing piece is provided with a guide part, one end of the fixing piece penetrates through the guide part, and the fixing piece is used for connecting the bearing piece and a fixed object;

the locking piece is arranged on the bearing piece and used for limiting the relative movement between the other end of the fixing piece and the bearing piece.

2. The bone fixation device of claim 1, wherein the guide portion comprises a first guide hole and a second guide hole;

the first guide hole and the second guide hole penetrate through the bearing piece, and a straight line of the first guide hole axis mapped in a plane intersects with a straight line of the second guide hole axis mapped in the plane;

the fixing pieces are arranged at least two, and at least one fixing piece is arranged in each of the first guide hole and the second guide hole.

3. The bone fixation device of claim 2, wherein the first guide hole and the second guide hole are each provided in two.

4. The bone fixation device of claim 1, wherein the fixation member comprises a first segment, a second segment, and a third segment;

the first section part, the second section part and the third section part are connected end to end in sequence and coaxially arranged, the outer diameter of the first section part is larger than the inner diameter of the guide part, threads are arranged on the second section part and the third section part, and the number of threads of the second section part is larger than the number of threads of the third section part;

the threads of the second section are double-thread threads, and the threads of the third section are single-thread threads.

5. The bone fixation device of claim 4, wherein one of the threads of the third segment is an extension of one of the threads of the second segment.

6. The bone fixation device of claim 4, wherein the major diameter of the second segment is greater than or equal to the major diameter of the third segment;

and/or the minor diameter of the thread of the second section is larger than or equal to the minor diameter of the thread of the third section.

7. The bone fixation device of claim 4, wherein the fixation member further comprises a fourth segment;

the fourth section portion set up in the third section portion keep away from one side of second section portion, the fourth section portion with the coaxial setting of third section portion, the fourth section portion is equipped with the screw thread.

8. The bone fixation device of claim 7, wherein the major diameter of the thread of the fourth segment is less than or equal to the minor diameter of the thread of the third segment.

9. The bone fixation device of claim 4, wherein the first segment includes a first sub-segment and a second sub-segment;

the second subsection part is connected with the second section part, the first subsection part is arranged on one side, far away from the second section part, of the second subsection part, and the second subsection part is arranged to be a spherical surface.