CN2772459Y

CN2772459Y - Splier style hollow screw drawing-out device

Info

Publication number: CN2772459Y
Application number: CN 200520008985
Authority: CN
Inventors: 宋朝晖; 张英泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-25
Filing date: 2005-03-25
Publication date: 2006-04-19
Anticipated expiration: 2015-03-25

Abstract

The utility model relates to a spliers style hollow screw drawing-out device which belongs to the technical field of surgery medical appliances. The problem the utility model solves is to provides a hollow screw drawing-out device which can quickly and conveniently take out a hollow screw without trauma after fracture is healed up. The utility model has the technical solving proposal that the utility model is provided with a pliers handle and a pliers clamping head, wherein an inner hexagon spanner is fixedly arranged in the pliers clamping head. A longitudinal shaft of the inner hexagon spanner is superposed with a central longitudinal shaft of a pliers body, the front end face of the inner hexagon spanner is positioned at the inner side of the pliers mouth plane of the pliers clamping head and pliers mouths at both sides of the pliers clamping head are respectively in a chop shape. The utility model has the advantages that the inner hexagon spanner in the pliers clamping head can be inserted in inner hexagon holes of a hollow screw nut, and meanwhile, the hollow screw nut can be clamped tightly by utilizing the pliers clamping head. The pliers handle can be rotated, and meanwhile, the pliers handle is drawn out. The hollow screw can be conveniently and quickly taken out, and the utility model has the advantages of simple structure and practicability.

Description

Pincers type hollow screw nail puller

Technical field

This utility model relates to a kind of medical surgery hollow screw and plays spike devices, belongs to the surgical medical equipment technical field.

Background technology

Fracture of femoral neck often takes place in the old people, and general Therapeutic Method all needs to implant hollow screw and positions fixingly, takes out hollow screw again after the fracture healing.When taking out hollow screw; the inner hexagonal hole that uses special-purpose inner hexagon spanner to insert the hollow screw head outwards screws out; and it is bigger owing to the spongy bone hole in the femoral head in practical operation; hollow screw when screwing out through regular meeting's slide fastener; can not outwards withdraw from, must outwards extract with instruments such as mosquito forceps or common hand vice.But because the nut of hollow screw is a circular arc, its edge contacts slick and sly with bone surface, jaw is difficult to clamp, operator must remove the cutter of the sclerotin around the nut, just can make jaw clamp nut outwards extracts, when this method can cause new wound, operating cost to patient's sclerotin, effort, make surgical staff feel very thorny.Therefore, medical worker and patient wish to develop a kind of novel hollow screw device for fetching nail, solve a difficult problem of taking out hollow screw after the union of fracture.

Summary of the invention

Problem to be solved in the utility model provides a kind of pincers type hollow screw nail puller that can fast, convenient, no wound take out hollow screw after union of fracture.

The technical scheme that solves the problems of the technologies described above is:

A kind of pincers type hollow screw nail puller, it has pincers handle, bar hold, its improvements are, at the bar hold internal fixation inner hexagon spanner has been installed, the longitudinal axis of inner hexagon spanner overlaps with the center longitudinal axis of caliper, the front end face of inner hexagon spanner is positioned at the planar inboard of jaw of bar hold, and the both sides jaw of bar hold 2 is respectively for splitting shape.

The outward flange that above-mentioned pincers type hollow screw nail puller, described jaw are split shape becomes 10 °-80 ° sharp angle with the jaw plane.

Above-mentioned pincers type hollow screw nail puller, the planar distance of the front end face of described inner hexagon spanner and jaw is 0.5-4mm.

Above-mentioned pincers type hollow screw nail puller is equipped with back-moving spring between described inner hexagon spanner and the both sides bar hold.

Adopt this pincers type hollow screw nail puller, can insert in the inner hexagonal hole of hollow screw nut with the inner hexagon spanner in the bar hold, and clamp the nut of hollow screw simultaneously with bar hold, one side is rotated the pincers handle, one side is outwards extracted, use this pincers type hollow screw nail puller can take out hollow screw quickly and easily, it is simple in structure, practical.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the side view of Fig. 1.

Labelling is as follows among the figure:

Pincers 1, bar hold 2, inner hexagon spanner 3, back-moving spring 4, jaw 5

The specific embodiment

Referring to accompanying drawing, this utility model by pincers 1, bar hold 2, inner hexagon spanner 3, back-moving spring 4 form.

Inner hexagon spanner 3 is fixedly mounted in the bar hold, and the longitudinal axis of inner hexagon spanner 3 overlaps with the center longitudinal axis of caliper, and when opening and closing bar hold 2, inner hexagon spanner 3 all is in the middle position of bar hold 2.The front end face of inner hexagon spanner 3 is positioned at the planar inboard of jaw of bar hold 2, with the planar distance of jaw be 1-2mm.The both sides jaw 5 of bar hold 2 respectively is the arc wedge, the edge of jaw 5 and jaw plane form 10 °-80 ° sharp angle, be preferably 15 °-45 °, like this when clamping the nut of hollow screw, jaw can more easily be embedded in the slit between nut and the sclerotin.

Use for convenient, between inner hexagon spanner 3 and both sides bar hold 2, back-moving spring 4 is installed, when user is not exerted oneself binding nut, jaw is in open configuration all the time, be convenient to the inner hexagonal hole of user, also be convenient to the nut that shape is aimed at hollow screw of splitting jaw 5 with inner hexagon spanner 3 aligning hollow screws.

During use, the inner hexagonal hole of inner hexagon spanner in the jaw 3 being aimed at the hollow screw nut inserts, then jaw 5 is aimed at the nut of hollow screw and the slit between the sclerotin, clamp, make in the acute angle embedding hollow joint crack of jaw 5, clamp nut, counterclockwise rotate the pincers handle more on the one hand, outwards extract simultaneously, just hollow screw can be clamped and extract.

Claims

1. pincers type hollow screw nail puller, it has pincers [1], bar hold [2], it is characterized in that: inner hexagon spanner [3] is installed at bar hold [2] internal fixation, the longitudinal axis of inner hexagon spanner [3] overlaps with the center longitudinal axis of caliper, the front end face of inner hexagon spanner [3] is positioned at the planar inboard of jaw of bar hold [2], and the both sides jaw [5] of bar hold [2] is respectively for splitting shape.

2. pincers type hollow screw nail puller according to claim 1 is characterized in that: the outward flange that described jaw is split shape becomes 10 °-80 ° sharp angle with the jaw plane.

3. pincers type hollow screw nail puller according to claim 1 and 2 is characterized in that: the front end face of described inner hexagon spanner [3] and the planar distance of jaw are 0.5-4mm.

4. pincers type hollow screw nail puller according to claim 1 and 2 is characterized in that: between described inner hexagon spanner [3] and the both sides bar hold [2] back-moving spring [4] is installed.

5. pincers type hollow screw nail puller according to claim 3 is characterized in that: between described inner hexagon spanner [3] and the both sides bar hold [2] back-moving spring [4] is installed.