CN103462676B - Vertebrae fixture and angle adjusting mechanism thereof - Google Patents

Abstract

An angle adjustment mechanism, comprising a bracket, a universal ball and a compression nut; the bracket is provided with a storage tank, the side wall of the storage tank is provided with internal threads, and the bottom wall of the storage tank is provided with A through hole; the universal ball is installed in the receiving groove, the hole wall of the through hole is arc-shaped, and is adapted to the outer spherical surface of the universal ball, and the universal ball penetrates The through hole exposes the universal ball to the outside of the bracket, and the universal ball is rotatable relative to the through hole; the compression nut is provided with external threads, and the compression nut It can be screwed into the receiving groove, and press the universal ball tightly. At the same time, a spinal fixation device using the above-mentioned angle adjustment mechanism is also provided. The spinal fixation device can adjust the clamping angle of the clamping mechanism to adapt to the differences between different surgical individuals and the randomness of placing patients, avoiding the need to adjust the clamping angle of the clamping mechanism. Further injury to the patient is avoided when the spine is fixed, while improving the precision of the operation.

Description

Vertebral Fixation Device and Its Angle Adjustment Mechanism

technical field

The invention relates to the field of medical equipment, in particular to a vertebra fixation device and an angle adjustment mechanism thereof.

Background technique

In the process of spinal surgery, it is necessary to avoid the relative movement and rotation of the diseased vertebra and the hospital bed, so as to keep the vertebral joints at the lesion position still all the time. The spine needs to be fixed by a spinal fixation device.

For the traditional spinal fixation device, it is divided into two parts, the crossbeam and the longitudinal beam, and the crossbeam connects the sick bed and the longitudinal beam. The spinous process of the vertebra and the longitudinal beam of the vertebra fixation device are fixed together, so that the diseased vertebra can be kept still relative to the hospital bed. When the spinous process is fixed to the longitudinal beam, the spinous process of the spine is clamped by the clamping device to realize the rigid connection between the spine and the longitudinal beam, so as to prevent the relative movement of the patient's spine and the hospital bed. However, due to the variability in the shape of individual vertebrae and the randomness of the placement of the longitudinal beams of the spinal fixation device each time the vertebra is clamped, it is difficult to ensure that the vertebra and the longitudinal beams of the spinal fixation device are on the same straight line, so even if the spinous processes are clamped Fixing on the longitudinal beam will also generate considerable internal stress. If the internal stress is too large, it will cause certain damage to the patient.

Contents of the invention

Based on this, it is necessary to provide a vertebra fixation device and its angle adjustment mechanism that can reduce the harm to the patient.

An angle adjustment mechanism, comprising:

The bracket is provided with a storage tank, the side wall of the storage tank is provided with an internal thread, and the bottom wall of the storage tank is provided with a through hole;

The universal ball is installed in the receiving groove, the hole wall of the through hole is arc-shaped, and is suitable for the outer spherical surface of the universal ball, and the universal ball passes through the through hole , so that the universal ball is partially exposed outside the bracket, and the universal ball is rotatable relative to the through hole; and

The compression nut is provided with an external thread, and the compression nut can be screwed into the receiving groove to compress the universal ball.

In one of the embodiments, it also includes a pressing piece, a circular hole is opened in the middle of the pressing piece, the pressing piece is arranged in the receiving groove, and is sleeved on the outside of the universal ball, and the pressing piece presses is held on the outer spherical surface of the universal ball, and when the compression nut is screwed into the receiving groove, the compression nut presses the pressure piece and compresses the universal ball through the pressure piece. to the ball.

In one of the embodiments, an anti-skid gasket is further included, and the anti-skid gasket is clamped between the compression nut and the pressing piece.

In one of the embodiments, the end of the compression nut away from the universal ball is provided with a cylindrical protrusion.

A spinal fixation device, comprising:

the above-mentioned angle adjustment mechanism; and

A clamping mechanism is connected with the universal ball, the clamping mechanism is used for clamping the vertebrae, and the universal ball rotates to adjust the clamping angle of the clamping mechanism.

In one of the embodiments, the clamping mechanism includes:

A connecting rod, which is connected to the universal ball, and the outer surface of the connecting rod is provided with external threads;

Two clamps, the clamps include a clamping part and a bracket connected to the clamping part, the bracket is bent into a "U" shape structure, and the two brackets are rotatably connected to the connecting rod one end of

The socket pipe is a circular tubular structure. The inner wall of the socket pipe is provided with internal threads. The socket pipe is screwed to the outside of the connecting rod. The socket pipe rotates relative to the connecting rod to make the socket pipe move on its axis;

The top block is arranged at one end of the sleeve tube close to the clamp, and the sleeve tube rotates relative to the connecting rod, so that the sleeve tube moves toward the clamp, and then drives the top block to press the two brackets, Furthermore, the two clamping parts are tightened.

In one embodiment, the universal ball is provided with a connecting hole, and the connecting rod and the socket pipe are both passed through the connecting hole. Both ends of the connecting rod and the socket pipe are exposed outside the universal ball.

In one of the embodiments, it also includes a first screwdriver, the first screwdriver is detachably arranged on the end of the connecting rod away from the clamp, and the first screwdriver is connected to the shaft of the connecting rod The hole is matched, and the first screwdriver is rotated to drive the connecting rod to rotate.

In one of the embodiments, it further includes a second wrench, the second wrench is detachably arranged at the end of the sleeve tube away from the clamp, and the second wrench is connected to the shaft of the sleeve tube The hole is matched, and the second screwdriver is rotated to drive the socket pipe to rotate.

In one of the embodiments, it further includes a top cone, the top cone includes a trumpet-shaped main body and serrations provided on the main body, and the main body is provided at an end of the connecting rod close to the clamp.

Compared with the traditional spinal fixation device, the above-mentioned spinal fixation device has at least the following advantages:

First of all, the above-mentioned spinal fixation device, the clamping mechanism is connected with the universal ball in the angle adjustment mechanism, through the rotation of the universal ball, the clamping angle of the clamping mechanism can be adjusted to realize the universal adjustment, so as to adapt to the adjustment between different surgical individuals. The difference and the randomness of placing the patient avoid further damage to the patient when the spine is fixed, and at the same time improve the accuracy of the operation.

In addition, for the above-mentioned vertebra fixation device, when the vertebra needs to be fixed, the socket tube is rotated so that the top block presses the two brackets, and then the two clamping parts tighten the spinous process of the vertebra to fix the vertebra longitudinally. Then turn the connecting rod, so that the connecting rod moves in its axial direction, and then make the teeth on the top cone clamp the vertebrae, so that the vertebrae are clamped in the transverse direction, so as to ensure that the vertebrae can be firmly fixed on the above-mentioned vertebrae during surgery. on the fixture.

Description of drawings

Fig. 1 is the structural diagram of the vertebra fixation device in the preferred embodiment of the present invention;

Fig. 2 is a sectional view of the angle adjustment mechanism in the vertebra fixation device shown in Fig. 1;

Fig. 3 is a sectional view of the clamping mechanism in the vertebra fixation device shown in Fig. 1;

Fig. 4 is a specific structural diagram of the clamping mechanism in the vertebra fixation device shown in Fig. 1 .

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 , a spinal fixation device 10 in a preferred embodiment of the present invention includes an angle adjustment mechanism 100 and a clamping mechanism 200 . The clamping mechanism 200 is used to clamp the vertebrae (not shown). The clamping mechanism 200 is connected to the angle adjusting mechanism 100 , and the angle adjusting mechanism 100 is used to adjust the clamping angle of the clamping mechanism 200 .

Please also refer to FIG. 2 , the angle adjusting mechanism 100 includes a bracket 110 , a universal ball 120 , a compression nut 130 , a pressing piece 140 , an anti-slip washer 150 and a cylindrical protrusion 160 .

The bracket 110 is roughly in the shape of a circular box. A receiving slot 112 is defined on the bracket 110 . Internal threads are defined on the sidewall of the receiving groove 112 . A bottom wall of the receiving tank 112 defines a through hole 114 . The hole wall of the through hole 114 is arc-shaped, and fits the outer spherical surface of the universal ball 120 .

The universal ball 120 defines a connecting hole 122 . The universal ball 120 is installed in the receiving groove 112 . The universal ball 120 passes through the through hole 114 , so that the universal ball 120 is partially exposed outside the bracket 110 , and the universal ball 120 is rotatable relative to the through hole 114 . The clamping mechanism 200 is connected with the universal ball 120 , and the universal ball 120 rotates to adjust the clamping angle of the clamping mechanism 200 .

The compression nut 130 is provided with external threads, and the compression nut 130 can be screwed into the receiving groove 112 .

A round hole (not shown) is opened in the middle of the pressing sheet 140 . The pressing piece 140 is disposed in the receiving groove 112 and sheathed on the outside of the universal ball 120 . The pressing piece 140 is pressed on the outer spherical surface of the universal ball 120 . When the compression nut 130 is screwed into the receiving groove 112 , the compression nut 130 presses the pressing piece 140 and compresses the universal ball 120 through the pressing piece 140 . Specifically, the surface of the pressing piece 140 and the universal ball 120 is an arc surface adapted to the outer spherical surface of the universal ball 120 , so that the combination between the pressing piece 140 and the universal ball 120 is tighter.

When the clamping angle of the clamping mechanism 200 needs to be adjusted, the compression nut 130 can be loosened to loosen the universal ball 120 so that the universal ball 120 can rotate freely. After adjusting the angle, tighten the compression nut 130, the compression nut 130 presses the pressure piece 140, and presses the universal ball 120 through the pressure piece 140, so that the universal ball 120 is locked and fixed relative to the bracket 110 and other components .

The anti-slip washer 150 is clamped between the compression nut 130 and the pressing piece 140 . The compression nut 130 presses the pressing piece 140 through the anti-slip washer 150 , and the anti-slip washer 150 acts as an anti-slip and cushioning function between the compression nut 130 and the pressing piece 140 .

It can be understood that both the pressing piece 140 and the anti-slip washer 150 can be omitted, and the compression nut 130 is screwed into the receiving groove 112 to directly compress the universal ball 120 .

The cylindrical protrusion 160 is disposed on an end of the compression nut 130 away from the universal ball 120 . Specifically, there are two columnar protrusions 160 , and the two columnar protrusions 160 are symmetrically arranged on the compression nut 130 . The operator can tighten or loosen the compression nut 130 through the cylindrical protrusion 160 . The angle adjustment mechanism 100 can also be fixed on the external fixing surface through the columnar protrusion 160 .

The clamping mechanism 200 is used to clamp the vertebrae. Specifically, the clamping mechanism 200 is mainly used for clamping the spinous process positions of the vertebrae. Please also refer to FIG. 3 , the clamping mechanism 200 includes a connecting rod 210 , a clamp 220 , a pin shaft 230 , a socket 240 , a top block 250 , a top cone 260 , a first screw 270 and a second screw 280 .

The connecting rod 210 is connected to the universal ball 120 , and the outer surface of the connecting rod 210 is provided with external threads.

There are two clamps 220 . The clamp 220 includes a clamping portion 222 and a bracket 224 connected to the clamping portion 222 , the bracket 224 is bent into a “U” shape, and the two brackets 224 are rotatably connected to one end of the connecting rod 210 .

Specifically, the pin shaft 230 is vertically passed through the connecting rod 210 , and the pin shaft 230 is rotatable relative to the connecting rod 210 . The brackets 224 of the two clamps 220 are rotatably connected to two ends of the pin shaft 230 , so that the two clamps 220 are rotatably connected to one end of the connecting rod 210 .

The socket pipe 240 is a circular tubular structure, and the inner wall of the socket pipe 240 is provided with internal threads, and the socket pipe 240 is screwed to the outside of the connecting rod 210 . Since the socket pipe 240 and the connecting rod 210 are threadedly matched, the socket pipe 240 rotates relative to the connecting rod 210 to make the socket pipe 240 move in its axial direction.

The top block 250 is a hollow structure. The jacking block 250 is arranged on one end of the sleeve pipe 240 close to the clamp 220, and the sleeve pipe 240 rotates relative to the connecting rod 210, so that the sleeve pipe 240 moves toward the direction of the clamp 220, and then drives the jacking block 250 to press the two brackets 224, and then The two clamping parts 222 are tightened. A limiting block 212 is also provided on the connecting rod 210 to limit the socket pipe 240 .

The top cone 260 is hollow and trumpet-shaped. The top cone 260 includes a trumpet-shaped main body 262 and serrations 264 disposed on the main body 262 . The main body 262 is disposed on an end of the connecting rod 210 close to the clamp 220 .

When it is necessary to fix the vertebrae, the sleeve tube 240 is rotated so that the top block 250 presses the two brackets 224, and then the two clamping parts 222 tighten the spinous processes of the vertebrae, so as to longitudinally fix the vertebrae. Then rotate the connecting rod 210 so that the connecting rod 210 moves in its axial direction, and then the teeth 264 on the top cone 260 clamp the vertebra, so that the vertebra is clamped in the transverse direction, ensuring that the vertebra can be firmly fixed during the surgical operation. It is fixed on the above-mentioned vertebra fixation device 10 .

It can be understood that when the clamp 220 clamps the vertebra firmly enough, the apex 260 can be omitted.

Both the connecting rod 210 and the socket pipe 240 pass through the connecting hole 122 on the universal ball 120 , and both ends of the connecting rod 210 and the socket pipe 240 are exposed outside the universal ball 120 . Please also refer to FIG. 4 , the first screw 270 is detachably disposed on the end of the connecting rod 210 away from the clamp 220 , and the first screw 270 is matched with the shaft hole of the connecting rod 210 . Turning the first screw 270 can drive the connecting rod 210 to rotate. The second wrench 280 is detachably disposed on the end of the sleeve tube 240 away from the clamp 220 , and the second wrench 280 is matched with the shaft hole of the sleeve tube 240 . Rotating the second screw handle 280 can drive the socket pipe 240 to rotate.

Specifically, a first shaft hole 272 and a second shaft hole 282 are provided on the first screw handle 270 and the second screw handle 280 respectively, the first shaft hole 272 and the second shaft hole 282 are hexagonal holes, and the connecting rod 210 and the end of the socket pipe 240 away from the clamp 220 are hexagonal tubular structures. One end of the connecting rod 210 and the socket pipe 240 away from the clamp 220 is matched with the first screw 270 and the second screw 280 respectively. During operation, the connecting rod 210 or the socket pipe 240 can be moved in the axial direction by turning the first screw 270 or the second screw 280 , thereby adjusting the top cone 260 or the clamp 220 . After the adjustment, the first screw 270 or the second screw 280 can be disassembled to reduce the space occupied by the entire spinal fixation device 10 .

It should be noted that the first shaft hole 272 and the second shaft hole 282 are not limited to be hexagonal holes, and may also be triangular holes or rectangular holes. The shape also changes with the change of the first shaft hole 272 and the second shaft hole 282 .

The above-mentioned vertebra fixation device 10, compared with the traditional vertebra fixation device, has at least the following advantages:

First, in the above-mentioned vertebra fixation device 10 , the clamping mechanism 200 is connected with the universal ball 120 in the angle adjustment mechanism 100 . Through the rotation of the universal ball 120, the clamping angle of the clamping mechanism 200 can be adjusted to achieve universal adjustment, so as to adapt to the differences between different surgical individuals and the randomness of placing patients, and avoid further damage to the patient when fixing the spine. damage while improving the accuracy of surgery.

In addition, for the above-mentioned vertebra fixation device 10, when it is necessary to fix the vertebra, the sleeve tube 240 is rotated so that the top block 250 presses the two brackets 224, and then the two clamping parts 222 tighten the spinous process of the vertebra, so as to fix the vertebra. Vertical fixation. Then rotate the connecting rod 210 so that the connecting rod 210 moves in its axial direction, and then the teeth 264 on the top cone 260 clamp the vertebra, so that the vertebra is clamped in the transverse direction, ensuring that the vertebra can be firmly fixed during the surgical operation. It is fixed on the above-mentioned vertebra fixation device 10 .

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. A spinal fixation device, characterized in that, comprising: An angle adjustment mechanism, the angle adjustment mechanism includes: a bracket, a universal ball and a compression nut; a storage groove is provided on the bracket, an internal thread is provided on the side wall of the storage groove, and an internal thread is provided on the side wall of the storage groove. The bottom wall is provided with a through hole; the universal ball is installed in the receiving groove, and the hole wall of the through hole is arc-shaped, and is adapted to the outer spherical surface of the universal ball. The through hole is passed through the ball, so that the universal ball is partially exposed outside the bracket, and the universal ball is rotatable relative to the through hole; the compression nut is provided with external threads, so that The compression nut can be screwed into the receiving groove, and compress the universal ball; and The clamping mechanism is connected with the universal ball, the clamping mechanism is used to clamp the vertebrae, and the universal ball rotates to adjust the clamping angle of the clamping mechanism; the clamping mechanism includes: Connecting rod, two clamps, socket pipe and top block; the connecting rod is connected to the universal ball, and the outer surface of the connecting rod is provided with external thread; the clamp includes a clamping part and a connecting The bracket on the clamping part, the bracket is bent into a "U"-shaped structure, and the two brackets are rotatably connected to one end of the connecting rod; the sleeve is a circular tubular structure, and the sleeve Internal threads are provided on the inner side wall of the connecting pipe, and the socket pipe is screwed to the outside of the connecting rod, and the socket pipe rotates relative to the connecting rod, so that the socket pipe can move in its axial direction; the top block It is arranged at one end of the sleeve tube close to the clamp, and the sleeve tube rotates relative to the connecting rod, so that the sleeve tube moves toward the clamp, and then drives the top block to press the two brackets, thereby making the two brackets The clamping part is clamped. 2. The vertebra fixation device according to claim 1, wherein a connecting hole is opened on the universal ball, and the connecting rod and the sleeve pipe are all pierced in the connecting hole, and the connecting Both ends of the rod and the sleeve are exposed outside the universal ball. 3. The vertebra fixation device according to claim 2, further comprising a first screw, the first screw is detachably arranged at the end of the connecting rod away from the clamp, and the The first screwdriver cooperates with the shaft hole of the connecting rod, and turning the first screwdriver can drive the connecting rod to rotate. 4. The vertebra fixation device according to claim 3, further comprising a second screw, the second screw is detachably arranged at the end of the sleeve tube away from the clamp, and the The second wrench cooperates with the shaft hole of the sleeve pipe, and turning the second wrench can drive the sleeve pipe to rotate. 5. The vertebra fixation device according to claim 3, further comprising a top cone, the top cone includes a trumpet-shaped main body and serrations arranged on the main body, the main body is arranged on the connecting The rod is near the end of the clamp. 6. The vertebra fixation device according to claim 1, further comprising a pressing piece, a round hole is opened in the middle of the pressing piece, the pressing piece is arranged in the receiving groove, and is sheathed in the said holding groove. On the outside of the universal ball, the pressing piece is pressed and held on the outer spherical surface of the universal ball. When the compression nut is screwed into the receiving groove, the compression nut presses the pressure piece, and The universal ball is compressed by the pressing piece. 7 . The vertebra fixation device according to claim 6 , further comprising an anti-slip washer, and the anti-slip washer is clamped between the compression nut and the pressing plate. 8 . 8 . The vertebra fixation device according to claim 1 , wherein a cylindrical protrusion is provided at the end of the compression nut away from the universal ball. 9 .