Safe self-destructing syringe

Abstract

The invention discloses a safe self-destructing syringe, which comprises an outer sleeve, a core rod, a rubber plug, a locking mechanism and a needle base, wherein the locking mechanism sequentially comprises a screw lock clasp, a screw lock and a screw from the inside to the outside; the outer sleeve is vertically arranged; the core rod is inserted into the outer sleeve from an opening in the lower end of the outer sleeve; a core rod boss is arranged at the top end of the core rod; the rubber plug sleeves the core rod; the core rod boss is inserted into the screw lock clasp from the opening in the lower end of the screw lock clasp; the screw lock sleeves the screw lock clasp; and the screw sleeves the screw lock. According to the safe self-destructing syringe disclosed by the invention, one set of locking mechanism is added, so that the screw can be prevented from falling off together with an injection needle in the use procedure, and can also be easily pulled back together with the screw when the core rod falls back; the destructing effect on the used syringe is obvious; and the syringe can be prevented from being repeatedly used.

Description

technical field [0001] The invention relates to a safe self-destruction syringe, which belongs to the technical field of medical devices. Background technique [0002] Safety syringes are mainly designed to prevent accidental injury to medical staff during the use of syringes, as well as to prevent cross-infection from repeated use of syringes, and to facilitate the subsequent recycling, transportation and disposal of medical waste; [0003] At present, the design idea of ​​the safety syringe is to retract the injection needle into the injection syringe after use, and destroy the syringe at the same time to make it invalid, so as to achieve the above-mentioned purpose. [0004] The Chinese patent with the application number 201520253101X discloses a safety syringe with a separate design of the jacket and the screw port, which has a significant effect on the destruction of the used syringe and can prevent the syringe from being reused. For the used syringe, the plunger is ret...

AI Technical Summary

Problems solved by technology

However, the connection between the screw and the outer jacket relies on interference fit to fix the screw, which brings a contradiction. The interference is small, and the screw with the needle is easy to fall off during use, which may cause the injection of the patient. When the screw mouth falls off together with the injection needle; it will be more laborious to pull the screw mouth out after the use of the large interference. After the product is used, the screw mouth cannot be pulled down, and the design purpose of the safety syringe is lost. Considering the processing The precision level of the process, it is very difficult to reach this intermediate point

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