CN216394224U

CN216394224U - Spinal surgery pedicle screw fixing device

Info

Publication number: CN216394224U
Application number: CN202122429606.5U
Authority: CN
Inventors: 邓海涛; 卿培东; 李明凡; 廖恒
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-04-29
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a spinal surgery pedicle screw fixing device which comprises a tail cap, wherein a connecting rod is connected to the inner bottom wall of the tail cap in a sliding mode, two ends of the connecting rod penetrate through the outer portion of the tail cap, a first bolt is connected to the inner portion of the tail cap in a threaded mode, a screw body is fixedly connected to the lower end of the tail cap, a fastening assembly is arranged inside the tail cap, an anti-skidding assembly is arranged on one side of the tail cap, and a limiting assembly is arranged inside the tail cap. The utility model discloses a through setting up first bolt extrusion fastening block, through the area of contact who sets up fastening block increase and connective bar to increase frictional force, through setting up the frictional force between bar line increase connective bar and fastening block and the tail cap, through setting up the solid fixed ring of second bolt locking second, make first solid fixed ring and the solid fixed ring of second press from both sides tight connective bar, fix the connective bar, finally realize preventing that the connective bar postoperative from taking place gliding effect.

Description

Spinal surgery pedicle screw fixing device

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a pedicle screw fixing device for spinal surgery.

Background

Pedicle screws serve primarily to restore the sequence of the spine during spinal surgery. Can help patients with unstable spine or spine fracture to restore spine and maintain spine stability. For patients with scoliosis or kyphosis, correction can be performed.

But current pedicle of vertebral arch screw has the gliding risk of connective bar after the operation, can influence the fixed effect to the vertebra after the connective bar slides, influences patient's treatment progress, and serious even needs the secondary operation to adjust, greatly increased doctor's work load and patient's misery, consequently, technical staff in the field provides a pedicle of vertebral column surgery screw fixing device to solve the problem that proposes among the above-mentioned background art.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a pedicle screw fixing device for spinal surgery, which prevents a connecting rod from sliding after operation and avoids the trouble of secondary operation adjustment.

In order to achieve the purpose, the utility model provides the following technical scheme:

a spinal surgery pedicle screw fixing device comprises a tail cap, wherein a connecting rod is connected to the inner bottom wall of the tail cap in a sliding mode, two ends of the connecting rod penetrate through the outer portion of the tail cap, a first bolt is connected to the inner portion of the tail cap in a threaded mode and arranged above the connecting rod, a screw body is fixedly connected to the lower end of the tail cap, a fastening assembly is arranged inside the tail cap and located between the connecting rod and the first bolt, an anti-skidding assembly is arranged on one side of the tail cap, the surface of the anti-skidding assembly is in contact with the surface of the connecting rod, and a limiting assembly is arranged inside the tail cap;

through above-mentioned technical scheme, pass the connective bar tail cap, fix the connective bar through twisting first bolt, through setting up first bolt extrusion fastening components, fix the connective bar through fastening components, thereby improve fixed effect, through setting up anti-skidding subassembly fixed connection stick, thereby further strengthen fixed effect, through setting up the fixed first bolt of spacing subassembly, avoid first bolt not hard up, reduce the pressure to the connective bar, thereby prevent that the connective bar from taking place to slide.

Further, the fastening assembly comprises a fastening block, the fastening block is arranged inside the tail cap, the lower end of the fastening block is matched with the surface of the connecting rod, the lower end of the fastening block is in contact with the surface of the connecting rod, and the top of the fastening block is in contact with the bottom of the first bolt;

through above-mentioned technical scheme, during the installation connective bar, through setting up first bolt extrusion fastening block and connective bar, through the bigger fastening block fixed connection stick of area of contact, the frictional force increase that makes the connective bar receive prevents that the connective bar from sliding.

Furthermore, the fastening assembly also comprises strip-shaped lines, the strip-shaped lines are arranged on the surface of the connecting rod, and the inner bottom wall of the tail cap and the lower end of the fastening block are both provided with the strip-shaped lines;

through above-mentioned technical scheme, through setting up the bar line, the frictional force that further reinforcing connective bar received, further prevent that the connective bar from sliding.

Furthermore, the anti-skid assembly comprises a first fixing ring, the first fixing ring is fixedly connected to one side of the tail cap, two ends of the first fixing ring are hinged to second fixing rings, a second bolt is connected to the inner wall of the second fixing ring on one side in a threaded manner, one end of the second bolt penetrates through the second fixing ring on the other side, and one end of the second bolt is connected with the inner wall of the other second fixing ring in a threaded manner;

through above-mentioned technical scheme, through setting up two solid fixed rings of second bolt locking, make two solid fixed rings of second hug closely and press from both sides tight connective bar with first solid fixed ring to it is fixed with the connective bar, further avoid the connective bar to slide.

Furthermore, the limiting assembly comprises a limiting block and a limiting groove, the limiting block is connected to the inner wall of the tail cap in a sliding mode, the limiting groove is formed in the surface of the first bolt, the surface of the limiting block is in contact with the inner portion of the limiting groove, one end of the limiting block is connected with a pull rod in a rotating mode, and the other end of the pull rod penetrates through the outer portion of the tail cap;

through above-mentioned technical scheme, drive the inside of stopper income tail cap through setting up the pulling pull rod, first bolt installation back that finishes, drives the inside that the stopper inserted the spacing groove through promoting the pull rod, blocks first bolt through setting up the stopper, can avoid first bolt not hard up to it takes place to reduce the gliding condition of connective bar.

Furthermore, the limiting assembly further comprises a spring, the spring is arranged on the surface of the pull rod, and two ends of the spring are fixedly connected with the surface of the limiting block and the inner wall of the tail cap respectively;

through above-mentioned technical scheme, through setting up the inside that the spring was automatic to be popped into the spacing groove with the stopper, through the extrusion stopper that the spring lasts, avoid the stopper to break away from the spacing groove, increase the stability of equipment.

Furthermore, the limiting assembly further comprises an external thread and an internal thread, the external thread is arranged on the surface of the pull rod, and the internal thread is arranged on the inner wall of the tail cap;

through the technical scheme, when the first bolt is installed, through setting up internal thread and external screw thread, can fix pull rod and stopper in with external screw thread screw in internal thread through rotatory pull rod when the pulling pull rod, the fixed to pull rod and stopper is removed to the counter-rotation pull rod again after the installation is accomplished, avoids operating personnel to need to hold the pull rod always and just can carry out the installation effect, and is in the same way when dismantling to make things convenient for the dismantlement of first bolt.

In conclusion, the utility model has the following beneficial effects:

1. through setting up first bolt extrusion fastening block, through the area of contact who sets up fastening block increase and connective bar to increase frictional force, through setting up the frictional force between bar line increase connective bar and fastening block and the tail cap, through setting up the solid fixed ring of second bolt locking second, make first solid fixed ring and the solid fixed ring of second press from both sides tight connective bar, fix the connective bar, finally realize preventing that the connective bar postoperative from taking place gliding effect.

2. In driving the stopper to shrink back the tail cap through setting up the pulling pull rod, in popping into the spacing inslot with the stopper is automatic through setting up the spring, continuously extrude the stopper through the spring, prevent that stopper and spacing groove from breaking away from, through setting up internal bolt and external screw thread, can be with in the external screw thread screw in internal thread when making the pull rod pull out to fix pull rod and stopper, avoid needing to hold the trouble that the pull rod could install and dismantle always.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is an exploded view of the present embodiment;

FIG. 3 is an enlarged view of the present embodiment A;

FIG. 4 is a schematic structural diagram of the anti-skid assembly of the present embodiment;

FIG. 5 is a schematic structural diagram of a position limiting assembly of the present embodiment;

fig. 6 is a diagram showing a positional relationship between the stopper groove and the first bolt according to the present embodiment.

Description of reference numerals: 1. a tail cap; 101. a connecting rod; 102. a first bolt; 103. a screw body; 2. a fastening assembly; 201. a fastening block; 202. stripe-shaped lines; 3. an anti-skid component; 301. a first retaining ring; 302. a second retaining ring; 303. a second bolt; 4. a limiting component; 401. a limiting block; 402. a limiting groove; 403. a pull rod; 404. a spring; 405. an external thread; 406. an internal thread.

Detailed Description

Example (b):

the utility model is described in further detail below with reference to figures 1-6.

A pedicle screw fixing device for spinal surgery comprises a tail cap 1, wherein a connecting rod 101 is slidably connected to the inner bottom wall of the tail cap 1, two ends of the connecting rod 101 penetrate through the outer portion of the tail cap 1, a first bolt 102 is connected to the inner thread of the tail cap 1 in a threaded manner, the first bolt 102 is arranged above the connecting rod 101, a screw body 103 is fixedly connected to the lower end of the tail cap 1, a fastening component 2 is arranged inside the tail cap 1, the fastening component 2 is positioned between the connecting rod 101 and the first bolt 102, an anti-skidding component 3 is arranged on one side of the tail cap 1, the surface of the anti-skidding component 3 is in contact with the surface of the connecting rod 101, a limiting component 4 is arranged inside the tail cap 1, during surgery, a plurality of groups of screw bodies 103 are fixed on the spine of a patient, after the installation, the connecting rod 101 sequentially penetrates through the tail caps 1, the first bolt 102 is screwed into the tail cap 1 to fix the connecting rod 101, the first bolt 102 extrudes the fastening component 2 to enhance the fixing effect on the connecting rod 101, the anti-slip component 3 can further enhance the fixing effect on the connecting rod 101 and prevent the connecting rod 101 from sliding, the limiting component 4 can prevent the first bolt 102 from loosening and leading to the weakening of the fixing effect on the connecting rod 101 and further prevent the connecting rod 101 from sliding, the fastening component 2 comprises a fastening block 201, the fastening block 201 is arranged inside the tail cap 1, the lower end of the fastening block 201 is matched with the surface of the connecting rod 101, the lower end of the fastening block 201 is contacted with the surface of the connecting rod 101, the top of the fastening block 201 is contacted with the bottom of the first bolt 102, when the connecting rod 101 is installed, the fastening block 201 is firstly placed inside the tail cap 1, the lower end of the fastening block 201 is tightly attached to the connecting rod 101, then the first bolt 102 is screwed in and extrudes the fastening block 201, the pressure between the first bolt 102 and the connecting rod 101 is increased, thereby fixing the connecting rod 101, the fastening block 201 is relative to the first bolt 102, the area that can contact with the connecting rod 101 is bigger to increase frictional force, make the connecting rod 101 difficult to slide, fastening assembly 2 still includes bar line 202, bar line 202 sets up in the surface of connecting rod 101, the interior diapire of tail cap 1 and the lower extreme of fastening block 201 all are provided with bar line 202, the bar line 202 that connecting rod 101, tail cap 1 and fastening block 201 surface set up can be when connecting rod 101 contacts with tail cap 1 and fastening block 201, further reinforcing frictional force, thus reduce the gliding possibility of connecting rod 101;

the anti-skid component 3 comprises a first fixing ring 301, the first fixing ring 301 is fixedly connected to one side of the tail cap 1, two ends of the first fixing ring 301 are hinged with second fixing rings 302, the inner wall of the second fixing ring 302 at one side is in threaded connection with a second bolt 303, one end of the second bolt 303 penetrates into the second fixing ring 302 at the other side, one end of the second bolt 303 is in threaded connection with the inner wall of the other second fixing ring 302, the connecting rod 101 is firstly placed in the first fixing ring 301 when the connecting rod 101 is installed, after the first bolt 102 is fixed, the two second fixing rings 302 are turned over and tightly attached to the surface of the connecting rod 101, the two second fixing rings 302 are connected and locked through the second bolt 303, so that the two second fixing rings 302 and the first fixing ring 301 can clamp the connecting rod 101, the connecting rod 101 is connected with the tail cap 1, and the fixing effect on the connecting rod 101 is further strengthened, preventing the connecting rod 101 from sliding;

the limiting component 4 comprises a limiting block 401 and a limiting groove 402, the limiting block 401 is slidably connected to the inner wall of the tail cap 1, the limiting groove 402 is arranged on the surface of the first bolt 102, the surface of the limiting block 401 is in contact with the inside of the limiting groove 402, one end of the limiting block 401 is rotatably connected with a pull rod 403, the other end of the pull rod 403 penetrates through the outside of the tail cap 1, before the first bolt 102 is installed, the pull rod 403 is pulled first to put the limiting block 401 into the inside of the tail cap 1, when the first bolt 102 is screwed, the pull rod 403 is pushed to enable the limiting block 401 to be inserted into the limiting groove 402, the chamfer on the surface of the limiting block 401 can prevent the limiting block 401 from being clamped by the edge of the limiting groove 402, so that the limiting block 401 can clamp the first bolt 102 to prevent the first bolt 102 from loosening, the pressure on the fastening block 201 and the connecting rod 101 from being reduced, thereby preventing the connecting rod 101 from sliding, the limiting component 4 further comprises a spring 404, the spring 404 is arranged on the surface of the pull rod 403, two ends of the spring 404 are respectively fixedly connected with the surface of the limit block 401 and the inner wall of the tail cap 1, the spring 404 can automatically eject the limit block 401 into the limit groove 402, the limit block 401 can not be separated from the limit groove 402 by continuously applying pressure to the limit block 401, so that the limit block 401 can play a role more stably, the limit component 4 further comprises an external thread 405 and an internal thread 406, the external thread 405 is arranged on the surface of the pull rod 403, the internal thread 406 is arranged on the inner wall of the tail cap 1, when the connecting rod 101 is installed, the limit block 401 can be collected into the tail cap 1 by pulling the pull rod 403, the external thread 405 can be screwed into the internal thread 406 by rotating the pull rod 403 when the pull rod 403 is pulled, so that the pull rod 403 and the limit block 401 are fixed, an operator is prevented from pulling the pull rod 403 all the time when the connecting rod is installed, the pull rod 403 is reversely rotated after the installation is finished, so that the external thread 405 is separated from the internal thread 406, the limiting block 401 is automatically bounced into the limiting groove 402 by the spring 404, the limiting block 401 can be pulled out by the pull rod 403 when the connecting rod 101 is detached, and the pull rod 403 and the limiting block 401 are fixed by rotating the pull rod 403, so that the connecting rod 101 is convenient to detach.

The working principle is as follows: when in operation, firstly fixing a plurality of groups of screw bodies 103 on the spine of a patient, then sequentially penetrating a connecting rod 101 through a tail cap 1, adjusting the position of the connecting rod 101, pulling a pull rod 403 to drive a limiting block 401 to shrink into the tail cap 1, compressing a spring 404, simultaneously rotating the pull rod 403, screwing an external thread 405 into the internal thread 406, thereby fixing the pull rod 403 and the limiting block 401, then placing a fastening block 201 into the tail cap 1 and attaching to the surface of the connecting rod 101, screwing a first bolt 102 into the tail cap 1 by a wrench, pressing the fastening block 201 and the connecting rod 101 by the first bolt 102, thereby fixing the connecting rod 101, increasing friction force when a strip-shaped grain 202 on the surface of the connecting rod 101 is contacted with a strip-shaped grain 202 on the bottom of the fastening block 201 and the inner bottom wall of the tail cap 1, thereby enhancing the fixing effect, preventing the connecting rod 101 from sliding, reversely rotating the pull rod 403 after the connecting rod 101 is installed, make internal thread 406 and screw thread break away from, pull rod 403 and stopper 401 remove the fixed state, spring 404 loses the resistance simultaneously, drive stopper 401 when reseing through spring 404, make stopper 401 can insert the spacing groove 402 automatically, make stopper 401 block first bolt 102, prevent that first bolt 102 from taking place not hard up, further avoid connective bar 101 to take place gliding condition, spring 404 can continuously extrude stopper 401 simultaneously, make stopper 401 can't break away from spacing groove 402, thereby it laminates with connective bar 101 to overturn two solid fixed rings 302 of second, lock two solid fixed rings 302 of second through second bolt 303, thereby make two solid fixed rings 302 of second and first solid fixed ring 301 clamp tight connective bar 101, fix connective bar 101, thereby further prevent connective bar 101 from taking place to slide.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a spinal surgery pedicle of vertebral arch screw fixing device, includes tail cap (1), its characterized in that: the utility model discloses a novel anti-skidding tail cap, including tail cap (1), inner diapire sliding connection of tail cap (1) has connective bar (101), the outside to tail cap (1) is all run through at the both ends of connective bar (101), the inside threaded connection of tail cap (1) has first bolt (102), first bolt (102) set up in the top of connective bar (101), the lower extreme fixedly connected with screw body (103) of tail cap (1), the inside of tail cap (1) is provided with fastening component (2), fastening component (2) are located between connective bar (101) and first bolt (102), one side of tail cap (1) is provided with anti-skidding subassembly (3), the surface of anti-skidding subassembly (3) contacts with the surface of connective bar (101), the inside of tail cap (1) is provided with spacing subassembly (4).

2. The spinal surgical pedicle screw fixation device as claimed in claim 1, wherein: the fastening assembly (2) comprises a fastening block (201), the fastening block (201) is arranged inside the tail cap (1), the lower end of the fastening block (201) is matched with the surface of the connecting rod (101), the lower end of the fastening block (201) is in contact with the surface of the connecting rod (101), and the top of the fastening block (201) is in contact with the bottom of the first bolt (102).

3. The spinal surgical pedicle screw fixation device as claimed in claim 2, wherein: the fastening assembly (2) further comprises strip grains (202), the strip grains (202) are arranged on the surface of the connecting rod (101), and the strip grains (202) are arranged on the inner bottom wall of the tail cap (1) and the lower end of the fastening block (201).

4. The spinal surgical pedicle screw fixation device as claimed in claim 1, wherein: antiskid component (3) include first solid fixed ring (301), first solid fixed ring (301) fixed connection is in one side of tail cap (1), the both ends of first solid fixed ring (301) all articulate there is solid fixed ring (302) of second, one side the inner wall threaded connection of the solid fixed ring of second (302) has second bolt (303), the one end of second bolt (303) runs through to the opposite side the inside of the solid fixed ring of second (302), the one end and another of second bolt (303) the inner wall threaded connection of the solid fixed ring of second (302).

5. The spinal surgical pedicle screw fixation device as claimed in claim 1, wherein: spacing subassembly (4) include stopper (401) and spacing groove (402), stopper (401) sliding connection is in the inner wall of tail cap (1), the surface of first bolt (102) is seted up in spacing groove (402), the surface of stopper (401) contacts with the inside of spacing groove (402), the one end of stopper (401) is rotated and is connected with pull rod (403), the other end of pull rod (403) runs through to the outside of tail cap (1).

6. The spinal surgical pedicle screw fixation device as claimed in claim 5, wherein: the limiting assembly (4) further comprises a spring (404), the spring (404) is arranged on the surface of the pull rod (403), and two ends of the spring (404) are fixedly connected with the surface of the limiting block (401) and the inner wall of the tail cap (1) respectively.

7. The spinal surgical pedicle screw fixation device as claimed in claim 5, wherein: the limiting assembly (4) further comprises an external thread (405) and an internal thread (406), the external thread (405) is arranged on the surface of the pull rod (403), and the internal thread (406) is arranged on the inner wall of the tail cap (1).