Syringe with two automatic blocking structures

Abstract

The invention provides a syringe with two automatic blocking structures, and belongs to the technical field of medical instruments. The syringe comprises a needle cylinder, a needle bar, a mushroom head, a plunger and a syringe needle mounting base arranged at the front end of the needle cylinder; bosses are arranged on the inner wall of the front end of the needle cylinder, grooves are formed in the outer wall of the plunger, and the plunger reaches the bosses arranged on the inner wall of the front end of the needle cylinder to be matched with the grooves formed in the outer wall of the plunger in a clamped mode; a convex neck is arranged at a liquid introducing hole formed in the front end of the needle cylinder, the mushroom head is connected to the front end of the plunger through a connecting rod, the convex neck is shaped like a right triangle, the surface, facing the needle cylinder, of the convex neck is an oblique surface or a cambered surface, the surface, facing the liquid introducing hole, of the convex neck is a plane, a mushroom head containing cavity blocking the liquid introducing hole is formed in the portion, near the convex neck, of the liquid introducing hole, and the diameter of the mushroom head is slightly larger than the distance between the two opposite faces of the convex neck. The syringe is reasonable and simple in structure, easy to produce and manufacture and low in cost. The syringe cannot be used second time after being used once, usage safety is guaranteed, and therefore the condition that cross infection of viruses is caused when the syringe is repeatedly used is avoided.

Description

technical field [0001] The invention relates to a structure of a syringe, in particular to a disposable syringe that can be automatically locked to ensure that it cannot be used again to ensure hygiene and safety, and belongs to the technical field of medical devices. Background technique [0002] A syringe is a medical device that injects medicine into the patient's body to achieve the effect of diagnosis and treatment. Before the medical staff injects the patient, the medicine is first introduced into the syringe, and then the medicine is injected into the patient through the needle on the syringe. There are many potential dangers in traditional syringes, and when they are used improperly, they will cause very serious harm and adverse effects to people's health. The structure of traditional syringes cannot avoid repeated use. When the syringe injects medicine into a patient, the patient's blood, residual medicine, bacteria, viruses, or other pathogenic substances may rema...

AI Technical Summary

Problems solved by technology

Contaminated syringes also pose a very serious threat to the health of operators who need to avoid being injured by contaminated syringes

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