CN203417258U

CN203417258U - Screwdriver

Info

Publication number: CN203417258U
Application number: CN201320419938.8U
Authority: CN
Inventors: 钱建清
Original assignee: JIANGSU SHUANGYANG MEDICAL DEVICES CO Ltd
Current assignee: JIANGSU SHUANGYANG MEDICAL DEVICES CO Ltd
Priority date: 2013-07-16
Filing date: 2013-07-16
Publication date: 2014-02-05
Anticipated expiration: 2023-07-16

Abstract

The utility model discloses a screwdriver used for the fracture surgery. The screwdriver comprises a handle, wherein a handle rod is fixed to the handle through a pin bolt, a drive straight rod integrally extends at the outer end of the handle rod, the cross section of the drive straight rod is quincuncial, a guide rod integrally extends at the outer end of the drive straight rod, the diameter of the guide rod is smaller than that of the drive straight rod, an annular groove is formed in the guide rod, the annular groove is sleeved with an annular clamp spring, the diameter of the annular clamp spring is slightly larger than that of the guide rod, a ring opening is formed in the annular clamp spring, and the annular clamp spring has the tendency of keeping the initial size of the ring opening under the action of the self elasticity. When the drive straight rod on the handle rod of the screwdriver is right embedded into a drive hole of a screw, the annular clamp spring will be inwards squeezed and drawn in, the annular clamp spring and the guide rod are right located in a clamping-holding hole of the screw, the annular clamp spring will expand tightly in the clamping-holding hole of the screw under the self elasticity, and therefore the screwdriver and the screw are fixed. The screwdriver has the advantages of being simple in structure, convenient to operate, and capable of not only hoisting the screw, but also locking the screw.

Description

Screw screwdriver

Technical field

This utility model relates to medical instruments field, is specifically related to the screw screwdriver for clamp screws.

Background technology

In fracture fixation reattachment surgery, the screw that need to sling in screw box with screw screwdriver.On market, the structure of this Medical screw is: comprise that diameter is the screw body from up to down reducing gradually, on the outer circumference surface of screw body, offer external screw thread, at the end face of screw body, offer cross section and be quincuncial drive hole, in screw body below drive hole, offer and communicate with drive hole and aperture is less than the clamping hole of drive hole, the axial line of clamping hole overlaps with the axial line of drive hole.The structure of the screw screwdriver using is at present: comprise handle, handle is fixed with handlebar by pin, the outer end one of handlebar is extended with cross section and is quincuncial driving straight-bar, drive straight-bar by with screw in the form fit of drive hole drive screw turns.The shortcoming of this screw screwdriver is: when doctor needs to sling screw in operation process, need first in the outer end of screw screwdriver, to be set with a screw clamp, then hand-held screw screwdriver is by the cap head place of screw clamp alignment screw, again screw screwdriver is applied to the active force towards screw, the synchronous screw clamp that drives moves inward, screw clamp is extruded the cap head that opens and envelope screw in the contact process with screw cap head, then remove external force, the cap head of screw clamp pinching screw under the effect of self inside elastic force, thus the action of clamp screws completed; Then doctor more hand-held screw screwdriver by after being clamped the screw of slinging by screw clamp and putting in the screw hole on blade plate, doctor takes away screw clamp again from screw screwdriver, with the cross section on screw screwdriver, being quincuncial driving straight-bar again locks screw, complex operation so not only, operation efficiency is low, has also increased operating time.

Utility model content

The purpose of this utility model is to provide a kind of simple in structure, easy to operate, the screw of can slinging, the screw screwdriver that can lock screw again.

For achieving the above object, this utility model has adopted following technical scheme: described screw screwdriver, comprise: hands handle, handle is fixed with handlebar by pin, the outer end one of handlebar is extended with cross section and is quincuncial driving straight-bar, in the outer end one that drives straight-bar, be extended with diameter and be less than the guide post that drives straight-bar diameter, on guide post, offer annular groove, on annular groove, be set with slightly larger in diameter in the annular spring of guide post diameter, on annular spring, offer a ring opening, annular spring has all the time the trend that keeps initial ring openings of sizes under self elastic effect, when the driving straight-bar in screw screwdriver on handlebar just in time embeds the drive hole of screw, annular spring can be extruded inward and draw the clamping hole that is just in time arranged in screw with guide post in, annular spring can the clamping hole of swelling at screw under self elastic effect in, thereby realize screw screwdriver and screw fixes.

By the enforcement of technique scheme, the beneficial effects of the utility model are: doctor is as long as insert screw screwdriver from the drive hole of screw, just can realize screw is sling and put the screw hole of blade plate and the operation at the screw hole of blade plate by screw lock into, without doctor's other sleeving bolt folder on screw screwdriver, simple in structure, easy to operate, simplified operating procedure, improve operation efficiency, thereby shortened operating time.

Accompanying drawing explanation

Fig. 1 is the structural representation of screw screwdriver described in the utility model.

Fig. 2 is the enlarged diagram at the H position shown in Fig. 1.

Fig. 3 is the structural representation of A-A section in Fig. 1.

Fig. 4 is the installation diagram of screw screwdriver shown in Fig. 1 and screw.

Fig. 5 is the enlarged diagram at the G position shown in Fig. 4.

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Fig. 5, described screw screwdriver, comprise: handle 1, handle 1 is fixed with handlebar 3 by pin 2, the outer end one of handlebar 3 is extended with cross section and is quincuncial driving straight-bar 4, in the outer end one that drives straight-bar 4, be extended with diameter and be less than the guide post 5 that drives straight-bar 4 diameters, on guide post 5, offer annular groove, on annular groove, be set with slightly larger in diameter in the annular spring 6 of guide post 5 diameters, on annular spring 6, offer a ring opening, annular spring 6 has all the time the trend that keeps initial ring openings of sizes under self elastic effect, when the driving straight-bar 4 in screw screwdriver on handlebar 3 just in time embeds the drive hole of screw 7, annular spring 6 can be extruded inward gathering, and be just in time arranged in the clamping hole of screw 7 with guide post 5, annular spring 6 can swelling under self elastic effect in the clamping hole of screw 7, thereby realize screw screwdriver and screw 7 fixes.

Operation principle of the present utility model is as follows: the outer end of screw screwdriver is inserted from the drive hole of screw 7, driving straight-bar 4 on handlebar 3 in screw screwdriver is just in time embedded in the drive hole of screw 7, by driving the form fit of straight-bar 4 and drive hole, can realize screw screwdriver and drive screw 7 to rotate; In screw screwdriver, drive in the process that the continuation of straight-bar 4 inwardly inserts, the guide post 5 on screw screwdriver is introduced into the clamping hole of screw 7, and annular spring 6 is subject to the limited aperture of clamping hole and can be extruded inward and draws the clamping hole that enters screw 7 in; When the driving straight-bar 4 of screw screwdriver embeds after the drive hole of screw 7 completely, now the guide post on screw screwdriver 5 is also arranged in the clamping hole of screw 7 completely with annular spring 6, because annular spring 6 has all the time the trend that keeps initial ring openings of sizes under self elastic effect, now annular spring 6 can the clamping hole of swelling at screw under self elastic reaction in, thereby realize screw screwdriver and screw 7 fixes, so just can screw 7 be sling and put into the lock hole of blade plate by screw screwdriver.The utlity model has following advantage: doctor is as long as insert screw screwdriver from the drive hole of screw, just can realize screw is sling and put the screw hole of blade plate and the operation in the screw hole of blade plate by screw lock into, without doctor's other sleeving bolt folder on screw screwdriver, simple in structure, easy to operate, simplify operating procedure, improved operation efficiency, thereby shortened operating time.

Claims

1. screw screwdriver, comprise: handle, handle is fixed with handlebar by pin, the outer end one of handlebar is extended with cross section and is quincuncial driving straight-bar, it is characterized in that: in the outer end one that drives straight-bar, be extended with diameter and be less than the guide post that drives straight-bar diameter, on guide post, offer annular groove, on annular groove, be set with slightly larger in diameter in the annular spring of guide post diameter, on annular spring, offer a ring opening, annular spring has all the time the trend that keeps initial ring openings of sizes under self elastic effect; When the driving straight-bar in screw screwdriver on handlebar just in time embeds the drive hole of screw, annular spring can be extruded inward and draw the clamping hole that is just in time arranged in screw with guide post in, annular spring can the clamping hole of swelling at screw under self elastic effect in, thereby realize screw screwdriver and screw fixes.