CN215018752U - Anterior cervical fixation system - Google Patents

Abstract

The utility model discloses a cervical vertebra front fixing system, including fixed titanium plate, be provided with two pairs of above through-holes on the fixed titanium plate, the screw has been worn in the through-hole, the screw passes through the buckle to be fixed on fixed titanium plate, and is every right all be provided with the draw-in groove between the through-hole, the buckle including can with draw-in groove complex shell fragment and can support the screw to the structure of pressing on fixed titanium plate. The locking mode of the screw in the prior art is optimized, the screw is only required to be installed in the proper position of the fixed titanium plate, locking can be achieved, operation of a doctor is simplified, and operation risks are reduced.

Description

Anterior cervical fixation system

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to anterior cervical fixing system.

Background

The locking mode of the existing anterior cervical vertebra fixing system screw is that the screw is arranged in a fixed titanium plate, and then a rivet or a knob on the fixed titanium plate is rotated to enable the rivet or the knob to fix the screw. The use is more tedious, and once the rivet or the knob is not rotated in place, the screw is likely to loosen, causing medical accidents.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cervical vertebra anterior fixing system, it is loaded down with trivial details to solve and use rivet or knob set screw installation among the prior art, and the problem that takes off easily.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides an anterior cervical spine fixing system, includes fixed titanium plate, be provided with two pairs of above through-holes on the fixed titanium plate, the screw has worn in the through-hole, the screw passes through the buckle to be fixed on fixed titanium plate, and is every right all be provided with the draw-in groove between the through-hole, the buckle including can with draw-in groove complex shell fragment and can support the screw to the structure of pressing on fixed titanium plate.

Preferably, a locking platform is arranged on a notch of the clamping groove, and the elastic sheet is located in the clamping groove and abuts against the locking platform.

Preferably, the width of the slot is gradually reduced in a direction approaching the notch.

Preferably, the upper part of the screw is provided with a pressing table, and the diameter of the pressing table is gradually increased from bottom to top; the pressing structure comprises a pressing arm capable of pressing against the upper surface of the pressing table.

Preferably, each screw is correspondingly provided with two abutting arms, and the screw is fixed between the two abutting arms.

Preferably, the two pressing arms form an arc shape, and the central angle is larger than 180 °.

Preferably, the elastic sheet is L-shaped.

Preferably, each buckle is correspondingly provided with two elastic sheets, and the two elastic sheets are arranged oppositely.

Preferably, the distance between the two oppositely arranged elastic sheets is gradually increased.

Compared with the prior art, the beneficial effects of the utility model are one of following at least:

the locking mode of the screw in the prior art is optimized, and the screw can be locked only by being arranged in a proper position of the fixed titanium plate, so that the operation of a doctor is simplified, and the operation risk is reduced.

The cooperation of shell fragment and draw-in groove to and the cooperation of shell fragment and locking platform, make the buckle and fix the fixed more firm between the titanium board.

When the screw stretches into the through hole, the lateral wall of the pressing table can provide lateral pressure for the pressing arm, so that the pressing arm deforms, the screw smoothly enters the through hole, after the screw enters the through hole, the lateral force applied to the pressing arm disappears, the pressing arm returns to the original position and abuts against the upper side of the pressing table, and the screw is fixed.

Every buckle can correspond and be provided with two shell fragments, two shell fragments set up relatively, at the buckle with fixed titanium plate fixed in-process, can play preliminary limiting displacement to the buckle.

Drawings

Fig. 1 is a schematic view of the anterior cervical fixation system in use.

Fig. 2 is a schematic view of the anterior cervical fixation system in use.

Fig. 3 is an exploded view of an anterior cervical fixation system.

Fig. 4 is a schematic structural view of a titanium plate fixed in the anterior cervical fixing system.

Fig. 5 is an enlarged view of a portion a in fig. 4.

Fig. 6 is a sectional view taken along line B-B in fig. 5.

Fig. 7 is a schematic structural view of a buckle in the anterior cervical fixation system.

Fig. 8 is a schematic view of a view angle of a buckle in the anterior cervical fixation system.

Fig. 9 is a schematic view of the screw structure of the anterior cervical fixation system.

In the drawings, 1-a fixed titanium plate; 1.1-a via; 1.2-card slot; 1.3-locking table; 2-buckling; 2.1-pressing arm; 2.2-spring plate; 3-screws; 3.1-compacting table.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides an anterior cervical fixing system, as shown in fig. 1-9, including fixed titanium plate 1, be provided with through-hole 1.1 more than two pairs on the fixed titanium plate 1, screw 3 has been worn in the through-hole 1.1, screw 3 passes through buckle 2 to be fixed on fixed titanium plate 1, and is every right all be provided with draw-in groove 1.2 between the through-hole 1.1, buckle 2 including can with draw-in groove 1.2 complex shell fragment 2.2 and can support the structure of pressing on fixed titanium plate 1 with screw 3.

In this embodiment, the elastic sheet 2.2 on the buckle 2 can go deep into the slot 1.2, so that the main body of the buckle 2 and the elastic sheet 2.2 are fixed in the slot 1.2 together, thereby fixing the buckle 2 and the fixed titanium plate 1; the pressing structure can press the screw 3 on the titanium plate, so that the fixing of the titanium plate 1, the buckle 2 and the screw 3 is realized. During the in-service use, only need pack into fixed titanium plate 1 suitable position with screw 3 and can realize the locking, simplified doctor's operation, reduced the operation risk, especially shell fragment 2.2 and draw-in groove 1.2's cooperation for the fixed more firm between buckle 2 and the fixed titanium plate 1.

The notch of the clamping groove 1.2 in this embodiment may be provided with a locking platform 1.3, and the elastic piece 2.2 is located in the clamping groove 1.2 and abuts against the locking platform 1.3.

Locking platform 1.3 is to the inboard protrusion of notch, and when shell fragment 2.2 got into draw-in groove 1.2, locking platform 1.3 can compress shell fragment 2.2 and make shell fragment 2.2 take place deformation, and when shell fragment 2.2 got into draw-in groove 1.2 completely, shell fragment 2.2 resumeed or partly resumeed deformation, and the top of shell fragment 2.2 supports in locking platform 1.3 below for buckle 2 and the installation of fixed titanium plate 1 are firm.

The width of the clamping groove 1.2 in the embodiment can be gradually reduced along the direction close to the notch, the side wall of the clamping groove 1.2 can provide a pushing force for the elastic sheet 2.2 to the bottom of the groove, and the clamping groove can play a role in fixing the buckle 2; even if the locking platform 1.3 exists, the pressure of the locking platform 1.3 can be shared.

The upper part of the screw 3 in the embodiment can be provided with a pressing table 3.1, and the diameter of the pressing table 3.1 is gradually increased from bottom to top; the pressing structure comprises a pressing arm 2.1 capable of pressing against the upper surface of the pressing table 3.1.

When the screw 3 stretches into the through hole 1.1, the lateral wall of the pressing table 3.1 can provide lateral pressure for the pressing arm 2.1, so that the pressing arm 2.1 deforms, the screw 3 smoothly enters the through hole 1.1, after the screw 3 enters the through hole 1.1, lateral force applied to the pressing arm 2.1 disappears, the pressing arm returns to the original position and abuts against the upper side of the pressing table 3.1, and the screw 3 is fixed.

Every in this embodiment screw 3 can correspond and be provided with two and support and press arm 2.1, screw 3 is fixed between two support and press arms 2.1 that correspond, sets up two and supports and press arm 2.1 and make the effort or the reaction force that receive between screw 3 and the support and press arm 2.1 symmetrical, and two each support and press arm 2.1 can play preliminary limiting displacement in the in-process that screw 3 inserted through-hole 1.1.

The two pressing arms 2.1 in the present exemplary embodiment preferably form an arc and have a central angle of more than 180 °. Because screw 3 all is circular with pressing down platform 3.1 cross-section, so when two support and press arm 2.1 to constitute the circular arc and central angle and be greater than 180, can be better with screw 3 or compress down the laminating of platform 3.1, can be better play preliminary limiting displacement in the process that screw 3 inserted through-hole 1.1.

The elastic sheet 2.2 in this embodiment may be L-shaped.

Every buckle 2 in this embodiment can correspond and be provided with two shell fragments 2.2, two shell fragments 2.2 set up relatively, at buckle 2 with fixed titanium plate 1 fixed in-process, can play preliminary limiting displacement to buckle 2.

The distance between two shell fragment 2.2 of relative setting in this embodiment increases gradually, makes things convenient for buckle 2 to aim at draw-in groove 1.2, and it is more convenient to install.

When the anterior cervical vertebra fixing system in the embodiment is used, the buckle can be fixed on the fixed titanium plate, the elastic sheet deforms, enters and is clamped in the clamping groove, and the buckle is fixed. In the process that the screw is installed in the through-hole, the lateral wall that compresses tightly the platform extrudees the arm that supports for two distances between the arm that supports increase, when the screw assembly when in place, support the arm because the effect of elasticity reconversion, two distances between the arm that supports reduce, thereby laminate with the mesa that compresses tightly the platform, the reciprocating of restriction screw reaches the purpose of locking screw.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (9)

1. The utility model provides an anterior cervical spine fixing system, includes fixed titanium plate, be provided with two pairs of above through-holes on the fixed titanium plate, the screw has been worn in the through-hole, the screw passes through the buckle to be fixed on fixed titanium plate, its characterized in that: each pair of through holes are provided with a clamping groove, and each clamping buckle comprises an elastic sheet matched with the clamping groove and a pressing structure capable of pressing the screw on the fixed titanium plate.

2. The anterior cervical fixation system of claim 1, wherein the notch of the slot has a locking platform, and the spring plate is located in the slot and abuts against the locking platform.

3. The anterior cervical fixation system of claim 1, wherein the width of the slot decreases in a direction approaching the notch.

4. The anterior cervical fixation system according to claim 1, wherein the screw is provided with a compression table at an upper portion thereof, the compression table gradually increasing in diameter from bottom to top; the pressing structure comprises a pressing arm capable of pressing against the upper surface of the pressing table.

5. The anterior cervical fixation system according to claim 4, wherein two abutment arms are provided for each screw, the screw being secured between the respective two abutment arms.

6. The anterior cervical fixation system of claim 5, wherein the two abutment arms are arcuate and have a central angle greater than 180 °.

7. The anterior cervical fixation system of claim 2, wherein the spring is L-shaped.

8. The anterior cervical fixation system of claim 2, wherein each clip has two resilient tabs disposed opposite each other.

9. The anterior cervical fixation system of claim 8, wherein the distance between the two opposing spring plates increases gradually.

Images