Embedded anti-pollution injector

Abstract

The invention discloses an embedded anti-pollution injector, which belongs to the technical field of injectors. Technical key points are that: the embedded anti-pollution injector comprises a needle cylinder, a wing plate, a piston, a columnar push rod and a guide cover plate, wherein the wing plate is arranged at the back end of the needle cylinder; the piston is arranged in the needle cylinder; the columnar push rod is arranged on the back end part of the piston; the guide cover plate is arranged on the back end part of the needle cylinder; the columnar push rod passes through the guide cover plate, and extends to the outer side of the needle cylinder; the guide cover plate is provided with a groove which is communicated with the inner cavity of the needle cylinder; an air filter is arranged in the groove; and a contact part between the groove and the air filter is provided with a sealing ring. The invention aims to provide an embedded anti-pollution injector, which is simple in structure, has a good filtering effect and is used for preparing liquid medicaments.

Description

technical field [0001] The present invention relates to a syringe, more specifically to a built-in anti-pollution syringe used for liquid medicine preparation. Background technique [0002] At present, the commonly used dosing syringes in hospitals are ordinary syringes, which are composed of a syringe, a piston and a push rod. During operation, medical staff push and pull the piston to move through the push rod to realize operations such as suctioning and mixing the medicinal liquid. However, in actual use, it has been found that when medical staff perform operations such as suctioning and mixing medicinal liquid, their fingers will touch the push rod, and there is a possibility of cross-infection by bringing harmful substances such as bacteria into the medicinal liquid. In order to avoid the contamination of liquid medicine when medical personnel use the syringe, someone proposed to add a protective sleeve outside the push rod to solve the above technical problems, but it ...

AI Technical Summary

Problems solved by technology

However, during the use of the above solution, since the air filter is directly arranged on the guide cover plate, due to machining accuracy and other reasons, the air filter and the groove are not in close contact and the sealing is not ideal.

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