CN215937615U

CN215937615U - Transverse connector for internal fixer of spine

Info

Publication number: CN215937615U
Application number: CN202121454151.6U
Authority: CN
Inventors: 王子元; 蔚鑫; 韩想; 梁涛; 张纪锋
Original assignee: Beijing Ansong Technology Co ltd
Current assignee: Beijing Ansong Technology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-03-04
Anticipated expiration: 2031-06-29

Abstract

The utility model relates to a cross connector for a spine internal fixator, which comprises a cross connecting rod, a cross connecting hook and a connecting shaft, wherein one end of the cross connecting rod is fixedly provided with the cross connecting hook, the other end of the cross connecting rod is spliced with a connecting seat, the top of the other end of the cross connecting rod is provided with a jack and a circular groove which are vertically distributed and communicated, and the diameter of the circular groove is larger than the width of the jack. According to the utility model, the splicing structure is formed between the two transverse connecting hooks through the connecting seat, so that the transverse connecting hooks can be conveniently detached and replaced, the splicing structure is designed between the connecting seat and the transverse connecting rod, the connecting seat can be detached and assembled, the connecting seat does not need to be replaced when one of the transverse connecting hooks is replaced, the number of parts to be replaced is reduced, and the cost is reduced.

Description

Transverse connector for internal fixer of spine

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a transverse connector for a spine internal fixator.

Background

In spinal injury operation, usually adopt backbone fixer to fix the treatment to the backbone, backbone fixer includes nail stick system and cross connector, and the cross connector links two nail stick systems of establishing on backbone both sides branch together, makes backbone fixer become a whole to improve the location effect to the backbone.

The existing transverse connector is of an integrated structure, two transverse connecting hooks are fixed together through a transverse connecting rod and cannot be detached, when one transverse connecting hook is damaged, the whole transverse connector needs to be replaced, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a transverse connector for an internal spinal fixator.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a transverse connector for an internal spinal fixator comprises a transverse connecting rod, a transverse connecting hook and a connecting shaft, wherein one end of the transverse connecting rod is fixed with the transverse connecting hook, the other end of the transverse connecting rod is spliced with a connecting seat, the top of the other end of the transverse connecting rod is provided with a jack and a circular groove which are distributed up and down and are communicated, the diameter of the circular groove is larger than the width of the jack, the connecting seat is provided with a through hole, a connecting shaft penetrates through the through hole, one end of the connecting shaft is fixed with a transverse connecting hook, the top end of the connecting seat is provided with a first threaded hole communicated with the through hole, the first threaded hole is internally threaded with a locking screw to lock the connecting shaft in the through hole, the bottom end of the connecting seat is fixed with a cylinder, the fixture block penetrates through the insertion hole, extends into the circular groove, rotates by 90 degrees and is fixed with the transverse connecting rod through a connecting screw.

In any of the above schemes, preferably, the circular groove bottom walls on both sides of the insertion hole are respectively provided with a second threaded hole penetrating through the bottom wall of the transverse connecting rod, the bottom wall of the fixture block is provided with a threaded blind hole corresponding to the second threaded hole, and the connecting screw is sequentially in threaded connection with the second threaded hole and the threaded blind hole so as to fix the fixture block and the transverse connecting rod.

In any of the above aspects, preferably, the length of the latch is greater than the width of the insertion hole.

In any of the above schemes, preferably, the other end of the connecting shaft is fixed with a chuck through a positioning screw, and the diameter of the chuck is larger than that of the through hole.

In any of the above schemes, preferably, the front and rear side walls of the connecting seat are respectively provided with a third threaded hole communicated with the through hole, and the third threaded hole is in threaded connection with a limit screw.

In any of the above schemes, preferably, the front and rear side walls of the connecting shaft are respectively provided with a clamping groove, the end faces of the bottom wall in the clamping grooves are inclined planes, the end faces of the bottom wall in the clamping grooves in the front and rear side walls of the connecting shaft are parallel to each other, and the end portions of the limiting screws extend into the clamping grooves and abut against the end faces of the bottom wall of the clamping grooves.

In any of the above solutions, preferably, the top end surface and the bottom end surface of the cross connecting hook connected with the cross connecting rod and the cross connecting hook connected with the connecting shaft are flush with each other.

Compared with the prior art, the cross connector for the internal spinal fixator provided by the utility model has the following beneficial effects:

1. the connecting base and the transverse connecting rod are designed into the splicing structure, so that the connecting base can be disassembled and assembled, the connecting base does not need to be replaced when one of the transverse connecting hooks is replaced, the replacement number of parts is reduced, and the cost is reduced; the connecting shaft can slide in the through hole of the connecting seat, the distance between the two transverse connecting hooks can be adjusted, the transverse connecting hooks are tightly pressed through the locking screw after being adjusted, the adjustment of the whole length of the transverse connector is realized, the fixing device is suitable for fixing nail rods with different distances, and the application range is wide;

2. all set up the draw-in groove on the lateral wall around the connecting axle, the diapire of draw-in groove is inclined plane and parallel to each other moreover, and after the position of connecting axle was confirmed, screw into the draw-in groove with stop screw and compress tightly the diapire, because the effect that two inclined planes are parallel, the connecting axle is blocked by stop screw and can't remove in the through-hole, with the displacement of locking screw restriction connecting axle jointly, plays dual limiting displacement, and the connecting axle is fixed more firm.

Drawings

FIG. 1 is a schematic overall structural view of a preferred embodiment of a transconnector for an internal spinal fixation device in accordance with the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the connecting socket shown in FIG. 1;

fig. 4 is a schematic structural view of a slot on the connecting shaft in fig. 1.

The figures are labeled as follows: 1. a connecting seat; 2. a connecting shaft; 3. a transverse connecting rod; 4. a transverse connecting hook; 5. a card slot; 6. a limit screw; 7. a circular groove; 8. a connecting screw; 9. a jack; 10. a clamping block; 11. a cylinder; 12. a chuck; 13. and locking the screw.

Detailed Description

In order that the utility model may be further understood, the utility model will now be described in detail with reference to specific examples.

As shown in fig. 1 to 4, an embodiment of a cross connector for an internal spinal fixator according to the present invention includes a cross connecting rod 3, a cross connecting hook 4, and a connecting shaft 2, wherein one end of the cross connecting rod 3 is fixed with the cross connecting hook 4, the other end of the cross connecting rod 3 is connected with a connecting base 1 in a splicing manner, the top of the other end of the cross connecting rod 3 is provided with a jack 9 and a circular groove 7 which are distributed vertically and communicated, the diameter of the circular groove 7 is larger than the width of the jack 9, the connecting base 1 is provided with a through hole, the connecting shaft 2 penetrates through the through hole, one end of the connecting shaft 2 is fixed with the cross connecting hook 4, the top of the connecting base 1 is provided with a first threaded hole communicated with the through hole, the first threaded hole is connected with a locking screw 13 through a thread to lock the connecting shaft 2 in the through hole, the bottom end of the connecting base 1 is fixed with a cylinder 11, and the bottom end of the cylinder 11 is fixed with a clamping block 10, the fixture block 10 and the cylinder 11 form an inverted T-shaped structure, and the fixture block 10 penetrates through the insertion hole 9, extends into the circular groove 7, rotates by 90 degrees and is fixed with the transverse connecting rod 3 through the connecting screw 8.

In this embodiment, when the latch 10 is inserted into the circular groove 7, the cylinder 11 is inserted into the insertion hole 9, so that the bottom surface of the connecting socket 1 is attached to the top surface of the cross link 3.

In the structure, the connecting seat 1 and the transverse connecting rod 3 are designed into a splicing structure, so that the connecting seat can be disassembled and assembled, the connecting shaft 2 can penetrate through the through hole and can also be separated from the through hole, and the splicing structure is formed between the connecting shaft 2 and the connecting seat 1, so that the two transverse connecting hooks 4 can be spliced or split, the transverse connecting hooks 4 or the connecting seat 1 can be conveniently replaced without integrally replacing the transverse connector, the cost is reduced, and the use is more convenient; connecting axle 2 can slide in the through-hole of connecting seat 1, can adjust the interval between two horizontal connecting hooks 4, compresses tightly through locking screw 13 after adjusting, realizes the regulation of the whole length of horizontal connector, is applicable to the fixed between the different interval nail stick, and application scope is wide.

And second threaded holes penetrating through the bottom wall of the transverse connecting rod 3 are formed in the bottom walls of the circular grooves 7 on the two sides of the insertion hole 9 respectively, threaded blind holes corresponding to the second threaded holes are formed in the bottom wall of the fixture block 10, and the connecting screw 8 is in threaded connection with the second threaded holes and the threaded blind holes in sequence so as to fix the fixture block 10 and the transverse connecting rod 3. The number of second screw hole is two, plays the positioning action to connecting seat 1, and only fixture block 10 on connecting seat 1 passes from jack 9 in and stretches into circular recess 7, then rotatory 90 back second screw holes align with the screw thread blind hole on fixture block 10, is convenient for screw up second screw hole and screw thread blind hole with connecting screw 8 in, realizes fixture block 10 and transverse connecting rod 3's fixed to realize connecting seat 1 and transverse connecting rod 3's the fixed connection that dismantles.

The length of the clamping block 10 is greater than the width of the insertion hole 9, so that the clamping block 10 can be clamped in the circular groove 7 after rotating for 90 degrees and cannot be separated from the insertion hole 9.

The other end of connecting axle 2 passes through set screw fixed chuck 12, the diameter of chuck 12 is greater than the diameter of through-hole, prevents that connecting axle 2 from passing the through-hole and breaking away from connecting seat 1.

And third threaded holes communicated with the through holes are respectively formed in the front side wall and the rear side wall of the connecting seat 1, and the third threaded holes are in threaded connection with limiting screws 6.

Be equipped with draw-in groove 5 on the lateral wall respectively around connecting axle 2, the diapire terminal surface in the draw-in groove 5 is the inclined plane, and the diapire terminal surface in the draw-in groove 5 is parallel to each other on the lateral wall around connecting axle 2, stop screw 6's tip stretches into in the draw-in groove 5 and supports on the diapire terminal surface of draw-in groove 5.

The center lines of the first threaded hole and the third threaded hole are perpendicular to the center line of the through hole, and the center line of the first threaded hole is perpendicular to the center line of the third threaded hole.

All set up draw-in groove 5 on the lateral wall around connecting axle 2, the diapire of draw-in groove 5 is the inclined plane and is parallel to each other moreover, after the position of connecting axle 2 is confirmed, with stop screw 6 screw in draw-in groove 5 compress tightly the diapire, because the effect that two inclined planes are parallel, connecting axle 2 is blocked by stop screw 6 and can't remove in the through-hole, with the displacement of 13 common restriction connecting axles 2 of locking screw, play dual limiting displacement, connecting axle 2 is fixed more firm.

The top end face and the bottom end face of the transverse connecting hook 4 connected with the connecting shaft 2 and the transverse connecting hook 4 connected with the transverse connecting rod 3 are flush with each other, and two parallel nail rods can be clamped and fixed by the two transverse connecting hooks 4 at the same time.

The working principle of the embodiment is as follows: when the whole cross connector is assembled, firstly, the connecting seat 1 and the cross connecting rod 3 are assembled, the clamping block 10 at the bottom end of the connecting seat 1 penetrates through the jack 9 and extends into the circular groove 7, then the connecting seat 1 is rotated by 90 degrees to enable the threaded blind hole on the clamping block 10 to be aligned with the second threaded hole, the connecting screw 8 is screwed in the second threaded hole and the threaded blind hole so as to fix the connecting seat 1 at the top of the cross connecting rod 3, the assembling of the connecting seat 1 and the cross connecting rod 3 is realized, then the connecting shaft 2 penetrates through the through hole, the chuck 12 is fixed at the other end of the connecting shaft 2 through the positioning screw, due to the limitation of the chuck 12, the connecting shaft 2 can slide in the through hole but cannot slide out of the through hole and is separated from the connecting seat 1, at the moment, the two cross connecting hooks 4 are spliced together, then the distance between the two cross connecting hooks 4 is adjusted, the locking screw 13 is screwed, and the locking screw 13 compresses the top end of the connecting shaft 2 for locking, simultaneously, the third threaded hole is screwed in by the limit screw 6, the bottom wall of the clamping groove 5 is compressed, the connecting shaft 2 is clamped under the action of the two inclined planes, the axial displacement of the connecting shaft 2 is limited, the connecting shaft 2 cannot move, and the connecting shaft 2 and the locking screw 13 are jointly fixed, so that the dual-purpose effect is achieved, and the fixation is more stable.

It will be understood by those skilled in the art that the present invention includes any combination of the summary and detailed description of the utility model described above and those illustrated in the accompanying drawings, which is not intended to be limited to the details and which, for the sake of brevity of this description, does not describe every aspect which may be formed by such combination. 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 cross connector for an internal spinal fixator, comprising: including horizontal connecting rod, horizontal hook, connecting axle, horizontal hook is connected to the fixed one of one end of horizontal connecting rod, the connecting seat has been spliced to the other end of horizontal connecting rod, the other end top of horizontal connecting rod is equipped with and is the jack and the circular recess of upper and lower distribution and intercommunication, the diameter of circular recess is greater than the width of jack, be equipped with the through-hole on the connecting seat, it has the connecting axle to run through in the through-hole, horizontal hook is fixed to the one end of connecting axle, the top of connecting seat is equipped with the first screw hole with the through-hole intercommunication, first screw hole female connection locking screw is in order to lock the connecting axle in the through-hole, the bottom mounting cylinder of connecting seat, cylindrical bottom mounting fixture block, fixture block and cylinder constitute the type of falling T structure, the fixture block passes the jack and stretches into the circular recess and is fixed through connecting screw and horizontal connecting rod after rotatory 90.

2. The transconnector for an internal spinal fixator of claim 1 wherein: the length of the clamping block is larger than the width of the insertion hole.

3. The transconnector for an internal spinal fixator of claim 2 wherein: the fixture block is characterized in that second threaded holes penetrating through the bottom wall of the transverse connecting rod are formed in the bottom wall of the circular groove on two sides of the insertion hole respectively, threaded blind holes corresponding to the second threaded holes are formed in the bottom wall of the fixture block, and the connecting screws are sequentially in threaded connection with the second threaded holes and the threaded blind holes so as to fix the fixture block and the transverse connecting rod.

4. The transconnector for an internal spinal fixator of claim 1 wherein: the other end of the connecting shaft fixes the chuck through a positioning screw, and the diameter of the chuck is larger than that of the through hole.

5. The transconnector for an internal spinal fixator of claim 1 wherein: and third threaded holes communicated with the through holes are formed in the front side wall and the rear side wall of the connecting seat respectively, and the third threaded holes are connected with limiting screws in a threaded manner.

6. The transconnector for an internal spinal fixator of claim 5 wherein: the front side wall and the rear side wall of the connecting shaft are respectively provided with a clamping groove, the end faces of the bottom wall in the clamping grooves are inclined planes, the end faces of the bottom wall in the clamping grooves in the front side wall and the rear side wall of the connecting shaft are parallel to each other, and the end part of the limiting screw extends into the clamping groove and abuts against the end face of the bottom wall of the clamping groove.

7. The transconnector for an internal spinal fixator of claim 1 wherein: the top end surface and the bottom end surface of the transverse connecting hook connected with the transverse connecting rod and the transverse connecting hook connected with the connecting shaft are flush with each other.