Air filtering device and high pressure syringe

Abstract

The invention discloses an air filtering device and a high pressure syringe. The air filtering device is applied to the high pressure syringe. The high pressure syringe comprises a needle cylinder assembly, wherein the needle cylinder assembly comprises a cylinder body, a piston and a push rod mechanism; the air filtering device comprises a mounting seat and a filter membrane assembly; a mountingposition is formed in the surface of the mounting seat in a concave manner, and is used for allowing the cylinder body to be mounted; an air flow channel is formed in the mounting seat; one end of theair flow channel communicates with the mounting position, and the other end of the air flow channel penetrates through the surface of the mounting seat to form a ventilating hole; the filter membraneassembly is arranged on the surface of the mounting seat and covers the ventilating hole, and is used for filtering air current entering the ventilating hole. The technical scheme of the air filtering device disclosed by the invention aims to avoid the pollution to a cylinder body inner cavity of the needle cylinder assembly of the high pressure syringe by unclean materials in the air.

Description

[0001] related application [0002] This application claims the priority of the Chinese patent application with application number 201920658615.1 and titled "air filter device and high-pressure injector" filed on May 07, 2019, which is hereby incorporated by reference. technical field [0003] The invention relates to the technical field of medical instruments, in particular to an air filter device and a high-pressure injector with the air filter device. Background technique [0004] There are many unclean substances in the air. There is no air filter structure in the existing piston-type high-pressure injector, and the air directly enters the inner cavity of the syringe assembly of the high-pressure injector without filtering. In this way, the air is not clean The substance will pollute the inner cavity of the cylinder, and when the high-pressure syringe is used to inject the patient, the unclean substance may be injected into the human body together, which will bring dange...

AI Technical Summary

Problems solved by technology

[0004] There are many unclean substances in the air. There is no air filter structure in the existing piston-type high-pressure injector, and the air directly enters the inner cavity of the syringe assembly of the high-pressure injector without filtering. In this way, the air is not clean Substances will pollute the inner cavity of the cylinder. When using this high-pressure syringe to inject patients, unclean substances may be injected into the human body together, which will bring danger to the patient.

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