CN2163616Y

CN2163616Y - Fixator for external osteosynthesis

Info

Publication number: CN2163616Y
Application number: CN 93210551
Authority: CN
Inventors: 高质钢; 毛小芸
Original assignee: BEIJING HOSPITAL OF AIR FORCE OF CHINESE PEOPLE'S LIBERATION ARMY
Current assignee: BEIJING HOSPITAL OF AIR FORCE OF CHINESE PEOPLE'S LIBERATION ARMY
Priority date: 1993-04-27
Filing date: 1993-04-27
Publication date: 1994-05-04
Anticipated expiration: 2003-04-27

Abstract

The utility model relates to a groove-type pressurizing or lengthening bone external fixator, which belongs to the medical equipment of orthopaedics and is characterized in that the wire needle of the utility model is U-shaped; a screw connection piece is composed of an expansion bolt, a fixing bolt, a rotary sleeve, a connecting nut and a sliding screw. The expansion bolt is fixed on the gap of the arch groove of the fixing bracket of a lower wire needle by a nut. The fixing bolt is fixed to the fixing bracket of the upper wire needle by a nut and the lower end of the fixing bolt is provided with a ring groove. The rotary sleeve is in thread fit with the expansion bolt and is in slide fit with the fixing bolt. The upper part of the connecting nut is locked with the rotary sleeve by a sliding screw and the lower part of the connecting nut is meshed with the expansion bolt. The sliding screw penetrates through the rotary sleeve and is embedded into the ring groove of the fixing bolt. The utility model has the advantages of simple installation and adjustment, no harm on the limbs, and high stability.

Description

Fixator for external osteosynthesis

A kind of slot type pressurization/prolongation bone external fixator belongs to orthopedic medical device.

Common bone external fixator is the semi-ring slot type, it is by draw point, upper and lower two semi-ring slot type draw point fixed mounts that have bow groove and bow groove breach, by fluting draw point set bolt and the draw point ring for fixing is formed and be fixed on draw point fixation clamp in the arc chute of draw point fixed mount and three two ends with nut all is fixed on the threaded rod of bending on the groove breach with nut and forms, in Fig. 1, the 1st, semi-ring slot type draw point fixed mount, the 2nd, bow groove, the 3rd, bow groove breach; Fig. 2 is the installation diagram of draw point fixation clamp and fixed mount, the 4th, and draw point penetrates the hole.Its shortcoming has been that the screw rod of the pressurization or the effect of stretching of contracting often protrudes in outside the holder too much, stabs skin easily, need pull the hold-down nut on connecting screw rod and the draw point fixed mount simultaneously in pressurization or prolongation process.Easily make the overall structure distortion, and the opening of half circle groove is less, on limbs, is difficult for installing.

The purpose of this utility model is to provide a kind of installation, the easy to adjust and pressurization/prolongation bone external fixator that can make limbs avoid damaging again.

Of the present utility model being characterised in that: on, following two draw point fixed mounts all are the U fonts, described threaded connector is by being fixed on down on the draw point fixed mount bow groove breach with nut and screwed retract bolt, be fixed on the draw point fixed mount and the lower end has the set bolt of cannelure with nut, with retract bolt be threaded engagement and with set bolt be the rotary sleeve that is slidingly matched, an end and the rotary sleeve bottom coupling nut that the other end is threaded with retract bolt with the sliding screw locking and pass rotary sleeve and embed the sliding screw composition that plays locking action in the set bolt cannelure again.

Use is the result prove: it is very convenient to install, regulate, and also can not damage limbs and holder is distorted.

In order in conjunction with the embodiments this utility model to be done detailed description below, now as follows employed accompanying drawing title of present specification and numbering brief introduction:

The draw point fixed mount vertical view of Fig. 1, semi-ring slot type;

The installation diagram of Fig. 2, draw point fixation clamp and fixed mount;

Fig. 3, U-lag formula draw point fixed mount vertical view;

Fig. 4, U-lag formula pressurization/prolongation bone external fixator longitudinal section.

Embodiment:

Asking for an interview Fig. 3 .5 is U-lag formula pressurization/prolongation bone external fixator, the 2nd, and arc chute is called for short the bow groove, and the 6th, bow groove breach, the draw point fixation clamp just is clipped on the bow groove, and it can move along groove.

Goodbye Fig. 4 .7 goes up the draw point fixed mount, the 8th, following draw point fixed mount, the 9th, the draw point set bolt of fluting, the 10, the 11st, draw point ring for fixing, the 12nd, the nut that the draw point fixation clamp of trough of belt is used, the 13rd, set bolt, the 14th, retract bolt, the 15th, rotary sleeve, the 16th, coupling nut, 17, the 18th, the sliding screw of locking usefulness, 19～22nd, fix and use nut, 23～26th, packing ring.

In use, install retract bolt earlier, thread a needle again, with the draw point fixation clamp draw point is separately fixed on the bow groove of two " U " font draw point fixed mounts then, connect upper and lower two fixed mounts with three flexible screw rods then, the knochenbruch end face is fixed.When inward turning or outward turning rotary sleeve, just can make flexible elongate screw or shortening, prolong or pressurization so that rise.

Claims

1, a kind of slot type pressurization/prolongation bone external fixator, comprise draw point, two draw point fixed mounts that have bow groove and bow groove breach, be used to clamp draw point and be fixed on the draw point fixation clamp on the bow groove and pass bow groove breach two ends be screwed for use in connecting, the threaded connector of following two draw point fixed mounts, of the present utility model being characterised in that, the draw point fixed mount all is the U font, threaded connector is by being fixed on down on the draw point fixed mount bow groove breach with nut and screwed retract bolt, be fixed on the draw point fixed mount and the lower end has the set bolt of cannelure with nut, with retract bolt be threaded engagement and with set bolt be the rotary sleeve that is slidingly matched, an end and the rotary sleeve bottom coupling nut that the other end is threaded with retract bolt with the sliding screw locking and pass rotary sleeve and embed the sliding screw composition that plays locking action in the set bolt cannelure again.

2, slot type pressurization/prolongation bone external fixator according to claim 1 is characterized in that described retract bolt has three.