An easy-to-assemble anti-pollution syringe

Abstract

The invention discloses an anti-pollution injection syringe which is easy to assemble. The injection syringe comprises a syringe, wherein a liquid inlet / outlet is formed in the front end of the syringe; the syringe is internally provided with a piston and a columnar push rod connected with the piston; an elastic soft membrane sleeve is arranged at the periphery of the columnar push rod; elastic rings are arranged at the front and rear ends of the elastic soft membrane sleeve; the thickness of each elastic ring is largely greater than the wall thickness of the elastic soft membrane sleeve; columnar connecting pieces which are connected with two ends of the elastic soft membrane sleeve are respectively designed at two front and rear ends of the columnar push rod; the columnar connecting piece at the front end of the columnar push rod is fixedly connected with the columnar push rod; the columnar connecting piece at the rear end of the columnar push rod is just fastened at the opening part of the rear end of the syringe and is in clearance fit of the columnar push rod; clamping grooves are formed in the outer circles of the columnar connecting pieces in a convex manner; the elastic rings at the front and rear ends of the elastic soft membrane sleeve are just clamped inside the clamping grooves of corresponding columnar connecting pieces. By adopting the anti-pollution injection syringe which is easy to assemble, the mounting difficulty is greatly alleviated, and the working efficiency is remarkably improved.

Description

technical field [0001] The invention relates to a filter, in particular to an easy-to-assemble anti-pollution syringe. Background technique [0002] figure 1 Shown is a schematic structural diagram of the Chinese patent automatic back-suction anti-pollution dosing syringe (patent number ZL200810027775.2), which includes a syringe a, the rear end of the syringe a is provided with a wing b, and the syringe a The front end of the cylinder is provided with a liquid inlet and outlet c. The syringe a is provided with a piston d and a columnar push rod e connected to the piston d. The periphery of the columnar push rod e is provided with an elastic soft membrane sleeve f. The wall thickness of the soft membrane sleeve f is 0.6±0.05mm, the front end of the columnar push rod e is provided with a circular card g, and the columnar push rod e is covered with two circular snap rings h, and the wing plate The center of b is fastened with a plug i, the columnar push rod e passes through ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an easy-to-assemble anti-pollution syringe, which solves the problem of difficult installation and reduced work efficiency

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