Safe double-cannula device for needle head

Abstract

The invention relates to a safe double-cannula device for a needle head, which is used for sheathing the needle head of a syringe and comprises an inner cannula and an outer cannula which are mutually nested. The inner cannula comprises a cannula base connected on a sidewall and a cannula body, and the cannula body is provided with a slot. The outer cannula is slideably sheathed on the periphery of the inner cannula. When the outer cannula is stretched outwards, the slot of the inner cannula is opened, and a pipeline for the vertical and transverse straddle of the needle head of the syringe is offered to avoid the danger that the hand of a user is straightly pierced by the needle head; when the outer cannula shrinks inwards, the slot is shaded and the needle head can be shaded in the double-cannula device consisting of the inner cannula and the outer cannula, thereby avoiding residual liquid medicine in the needle head flowing out through the slot.

Description

technical field [0001] The invention relates to a cannula device, in particular to a safety double cannula device for needles. Background technique [0002] A syringe is a device used to inject liquid substances such as medicinal liquid, blood or nutrient solution into the patient's body. It inserts the needle into the patient's body, and then utilizes the thrust of the piston in the syringe to inject the liquid stored in the syringe into the patient's body through the needle. [0003] Since the needle of the syringe is inserted into the patient's body during use, the needle of the syringe is stained with the patient's blood after use. To prevent others from being accidentally infected by the sick person, used needles must be disposed of safely so that no one can come into contact with them. [0004] Accordingly, there is a so-called safety syringe structure, which mainly stores or breaks the used needles in a container to avoid contact with anyone to avoid infection. [...

AI Technical Summary

Problems solved by technology

That is, when the medical staff intends to place the needle 500 in the needle sleeve 600 after the syringe injection is completed, the needle 500 is inserted straight from the open end 611 of the needle sleeve 600 along the length direction of the needle body 510 However, this insertion action along the length direction of the needle body 510 may cause the tip of the needle body 510 to penetrate along its length direction due to factors such as inadvertent or accidental pushes. Hands of medical staff, causing accidental infection of medical staff and other users

[0009] This shows that the needle sleeve of above-mentioned existing safety syringe obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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