CN201618254U

CN201618254U - Push rod

Info

Publication number: CN201618254U
Application number: CN2010201195517U
Authority: CN
Inventors: 王建友
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-27
Filing date: 2010-01-27
Publication date: 2010-11-03
Anticipated expiration: 2020-01-27

Abstract

The utility model relates to a push rod, in particular to a push rod in a syringe, consisting of a front ring, a ring washer, a fixed ring, a high rib rod, a low rib rod and a pull ring, wherein the ring washer is arranged behind the front ring; the fixed ring is arranged behind the ring washer; the diameter of the fixed ring is slightly less than the inner diameter of a cylinder of the syringe; the high rib rod is arranged behind the fixed ring; the height of the high rib rod is less than the diameter of the fixed ring; the height of the low rib rod is less than that of the high rib rod; the low rib rod and the high rib rod are connected with the front ring, the ring washer, the fixed ring and the pull ring; and the push rod has smooth and stable running in the cylinder of the syringe, is not easy to cause liquid leakage, has smooth and convenient operation, can replace the existing push rod, and is applied in the syringe.

Description

A kind of push rod

Technical field this utility model relates to the push rod of using in a kind of syringe, is a kind of push rod that has ring for fixing specifically.

The push rod of using in the present syringe of background technology by preceding circle, ring washer, bar muscle, draw the circle form, there is not the ring for fixing spline structure on it, when push rod is pulled out, during to barrel tip in injector cartridge, amplitude of fluctuation is big, cause leakage easily, in addition, push rod rear link muscle is concordant with the forward bar muscle, higher, the push rod rear portion is in injector cartridge the time, and amplitude of fluctuation is little, is unfavorable for operation.

The summary of the invention the purpose of this utility model is exactly in order to solve the shortcoming that above-mentioned push rod exists, and provides a kind of and have ring for fixing, is difficult for causing leakage and easy to operate new push rod.

For reaching this purpose, this utility model adopts following technical scheme:

This utility model is by preceding circle, ring washer, ring for fixing, high muscle bar, low muscle bar, draw circle to form, preceding circle size shape matches with the syringe piston inner chamber, there is ring washer the Qian Quan back, there is ring for fixing the ring washer back, the ring for fixing diameter is slightly smaller than the injector cartridge internal diameter, ring for fixing can make push rod in injector cartridge during push-and-pull amplitude of fluctuation little, make piston even running before the push rod, thereby the injector cartridge inner liquid medicine can not leaked to piston, there is high muscle bar the ring for fixing back, and high muscle bar height is less than the diameter of ring for fixing, and high muscle bar has certain swing space in injector cartridge, like this, the push-and-pull push rod smoothly, high muscle bar can make push rod smoothness run in cylindrical shell, low muscle bar height is less than high muscle bar, low muscle bar, circle before high muscle bar is connecting, ring washer, ring for fixing, draw circle, draw circle to be positioned at the end of push rod.

Compare with present push rod, it has increased a ring for fixing in the ring washer back, has made the bar muscle into high muscle bar, low muscle bar, makes push rod operate steadily, and be difficult for causing leakage, and operation smoothly, conveniently.

Description of drawings Fig. 1 product structure figure

Among the figure: 1, preceding circle 2, ring washer 3, ring for fixing 4, high muscle bar 5, low muscle bar 6, La Quan

Specific embodiment this utility model by preceding circle 1, ring washer 2, ring for fixing 3, high muscle bar 4, low muscle bar 5, draw circle 6 to form, there is ring washer 2 preceding circle 1 back, there is ring for fixing 3 ring washer 2 back, ring for fixing 3 diameters are slightly smaller than the injector cartridge internal diameter, there is high muscle bar 4 ring for fixing 3 back, high muscle bar 4 height are less than the diameter of ring for fixing 3, low muscle bar 5 height are less than high muscle bar 4 height, low muscle bar 5, high muscle bar 4 are connecting preceding circle 1, ring washer 2, ring for fixing 3, are drawing circle 6, draw circle 6 to be positioned at the end of push rod, holding and drawing circle 6 push-and-pull push rods, laborsaving smoothly.

Claims

1. push rod, by preceding circle (1), ring washer (2), ring for fixing (3), high muscle bar (4), low muscle bar (5), draw circle (6) to form, it is characterized in that: there is ring washer (2) preceding circle (1) back, there is ring for fixing (3) ring washer (2) back, there is high muscle bar (4) ring for fixing (3) back, high muscle bar (4) height is less than the diameter of ring for fixing (3), low muscle bar (5) height is less than high muscle bar (4), enclose (1), ring washer (2), ring for fixing (3) before low muscle bar (5), high muscle bar (4) are connecting, draw circle (6), draw circle (6) to be positioned at the end of push rod.