CN218305091U

CN218305091U - Bone screw pulling device

Info

Publication number: CN218305091U
Application number: CN202221934504.7U
Authority: CN
Inventors: 赵国泉; 曾国利
Original assignee: Luzhou Peoples Hospital
Current assignee: Luzhou Peoples Hospital
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-01-17
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to the field of medical technology, a bone screw pull-out device is disclosed, including the screwdriver, the screwdriver includes tool bit, cutter arbor and hilt, it gets the device to be equipped with the screw cover on the cutter arbor, the screw cover is got the device and is close to the first pedestal of tool bit on locating the cutter arbor, first pedestal bottom is equipped with first snap ring, be equipped with first through-hole on the first pedestal, be equipped with the stay cord that passes first through-hole on the first snap ring, the one end that the snap ring was kept away from to the stay cord is equipped with the receipts rope device of taut stay cord. This bone screw pulling device, when the screw that is located the bone because the screwdriver rotates and takes out when inefficacy, the screw that the accessible screwdriver was last is taken out the device and is extracted, specifically say, take the stay cord cover in the major part portion of screw, then through the other end shrink stay cord of pull rod pulling stay cord, extract the screw through traction force, remedied the not enough of spiral pulling nail, provide convenience for orthopedics doctor pulls out patient's screw.

Description

Bone screw pulling device

Technical Field

The utility model relates to the technical field of medical treatment, specifically a bone screw pull-out device.

Background

The tibia intercondylar fracture needs to be fixed by drilling a hollow screw in the treatment process, the screw needs to be taken out after the treatment is finished, the screw is taken out in a spiral mode by using a conventional screwdriver, the screw is easy to loosen after the internal time of the screw is long, and the screw is easy to slip and rotate repeatedly in situ when the screwdriver is twisted, so that the screw is often pulled out by using a grasper in an arthroscopic instrument by an existing doctor, but the effect of slipping and pulling the screw when the grasper is used for clamping the screw is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bone screw pull-out device to solve the problem that the screw that proposes among the above-mentioned background art skidded the difficult taking out in the bone for a long time easily.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: the utility model provides a bone screw pull-out device, includes the screwdriver, the screwdriver includes tool bit, cutter arbor and hilt, it gets the device to be equipped with the screw cover on the cutter arbor, the screw cover is got the device and is included locating the first pedestal that is close to the tool bit on the cutter arbor, first pedestal bottom is equipped with first snap ring, be equipped with first through-hole on the first pedestal, be equipped with the stay cord that passes first through-hole on the first snap ring, the one end that the snap ring was kept away from to the stay cord is equipped with the receipts rope device of taut stay cord.

Preferably, the rope winding device comprises a supporting rod which is arranged on the cutter bar and close to the cutter handle, a pull rod is hinged to the supporting rod, a second clamping ring is arranged on the pull rod, and one end, far away from the first clamping ring, of the pull rope is arranged on the second clamping ring.

Preferably, a second seat body is arranged at the position, close to the cutter bar, of the supporting rod, a second through hole is formed in the second seat body, and the pull rope penetrates through the second through hole to be connected with the second clamping ring.

Preferably, both ends of stay cord all are equipped with the stopper, the external diameter of stopper is greater than the internal diameter of first snap ring and second snap ring.

Preferably, the pull rope is made of steel wires.

Preferably, the pull rod comprises an arc-shaped buckling part.

The beneficial effects of the utility model are that concentrated the appearance: this bone screw pulling device, when the screw that is located the bone because the screwdriver rotates and takes out when inefficacy, the screw that the accessible screwdriver was last is taken out the device and is extracted, specifically say, take the stay cord cover in the major part portion of screw, then through the other end shrink stay cord of pull rod pulling stay cord, extract the screw through traction force, remedied the not enough of spiral pulling nail, provide convenience for orthopedics doctor pulls out patient's screw.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is an enlarged view of a point a in fig. 1 according to the present invention;

wherein, 1, a screwdriver; 2. a cutter head; 3. a cutter bar; 4. a hilt; 5. a screw extracting device; 6. a first seat body; 7. a first snap ring; 8. pulling a rope; 9. a rope retracting device; 10. a support bar; 11. a pull rod; 12. a second snap ring; 13. a second seat body; 14. a limiting block; 15. an arc-shaped buckling part.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, a bone screw extracting device, in this embodiment, includes a screwdriver 1, and the screwdriver 1 may be a conventional medical screwdriver suitable for human body contact. The screwdriver 1 comprises a screwdriver head 2, a screwdriver rod 3 and a screwdriver handle 4, wherein the screwdriver head 2 of the screwdriver 1 can be in a plum-blossom shape, a cross shape or a straight shape, screws are taken out for the auxiliary screwdriver, the screwdriver rod 3 is provided with a screw extracting device 5, and when the screws slip in a bone, the screws can be extracted by the screw extracting device 5. Further, the screw extracting device 5 comprises a first seat body 6 arranged on the cutter bar 3 and close to the cutter head 2, and the first seat body 6 can be welded with the cutter bar 3, so that the connection is more stable. 6 bottoms of first pedestal are equipped with first snap ring 7, be equipped with first through-hole on the first pedestal 6, first through-hole link up along the length direction of first pedestal 6, be equipped with the stay cord 8 that passes first through-hole on the first snap ring 7, the part that stay cord 8 is close to first snap ring 7 is used for the cover to get the screw big head, the one end that the snap ring was kept away from to stay cord 8 is equipped with the receipts rope device 9 of taut stay cord 8, can tighten up the stay cord 8 of cover on the screw and extract the screw through dragging screwdriver 1 through receiving rope device 9.

As a further optimized scheme in this embodiment, the rope retracting device 9 includes a support rod 10 disposed on the cutter bar 3 and close to the handle 4, the support rod 10 is welded to the cutter bar 3, a pull rod 11 is hinged to the support rod 10, and the pull rod 11 can be buckled by a finger to realize rotational displacement. And a second snap ring 12 is arranged on the pull rod 11, and one end of the pull rope 8, which is far away from the first snap ring 7, is arranged on the second snap ring 12. For making stay cord 8 possess the allowance of activity, the both ends of stay cord 8 all are equipped with stopper 14, and first snap ring 7 and second snap ring 12 all are equipped with the perforation, and the both ends of stay cord 8 are passed corresponding perforation respectively and are connected with stopper 14 that corresponds, and two stoppers 14 can prevent to break away from first snap ring 7 and second snap ring 12 when drawing stay cord 8, for realizing this purpose, stopper 14's external diameter is greater than the internal diameter of first snap ring 7 and second snap ring 12, forms spacingly.

Specifically, for standardizing 8 pull routes of stay cord, the bracing piece 10 is close to 3 departments of cutter arbor and is equipped with second pedestal 13, be equipped with the second through-hole on the second pedestal 13, stay cord 8 passes the second through-hole and is connected with second snap ring 12, makes the stay cord 8 be close to the lateral wall setting along cutter arbor 3 and bracing piece 10 like this, and the structure is compacter.

Specifically, the pull rope 8 is made of steel wires, so that the bending resistance and the tensile resistance are stronger.

Specifically, the pull rod 11 comprises an arc-shaped buckling part 15, and is beneficial to buckling stress of fingers.

The use principle is as follows: when the bone screw pulling device needs to take out a screw fixed in a bone under normal conditions, the screwdriver 1 is matched with the screw and the screwdriver 1 is rotated to take out the screw, when the screw is slipped in the bone and cannot be taken out spirally, the screw is sleeved on the head of the screw by adjusting the pull rope 8, then the arc-shaped buckling part 15 is buckled to enable the pull rope 8 to fasten the head of the screw, and then the screwdriver 1 is pulled to directly pull out the screw.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in the present application.

Claims

1. The utility model provides a bone screw pull-out device, includes screwdriver (1), its characterized in that, screwdriver (1) includes tool bit (2), cutter arbor (3) and sword handle (4), it gets device (5) to be equipped with the screw cover on cutter arbor (3), the screw cover is got device (5) and is close to first pedestal (6) of tool bit (2) including locating on cutter arbor (3), first pedestal (6) bottom is equipped with first snap ring (7), be equipped with first through-hole on first pedestal (6), be equipped with stay cord (8) that pass first through-hole on first snap ring (7), the one end that the snap ring was kept away from in stay cord (8) is equipped with receipts rope device (9) of taut stay cord (8).

2. The bone screw pulling device according to claim 1, wherein the rope retracting device (9) comprises a support rod (10) which is arranged on the cutter bar (3) and is close to the handle (4), the support rod (10) is hinged with a pull rod (11), a second snap ring (12) is arranged on the pull rod (11), and one end of the pull rope (8) far away from the first snap ring (7) is arranged on the second snap ring (12).

3. The bone screw pulling device according to claim 2, wherein a second seat (13) is disposed on the supporting rod (10) near the cutter bar (3), a second through hole is disposed on the second seat (13), and the pulling rope (8) passes through the second through hole and is connected to the second snap ring (12).

4. The bone screw extraction device according to claim 3, wherein both ends of the pull rope (8) are provided with a stopper (14), and the outer diameter of the stopper (14) is larger than the inner diameter of the first snap ring (7) and the second snap ring (12).

5. Bone screw extraction device according to claim 1, characterized in that said pull cord (8) is made of steel wire.

6. Bone screw extraction device according to claim 2, characterized in that said tie-rod (11) comprises an arc-shaped snap-action portion (15).