| 摘要 |
FIELD: medical equipment.SUBSTANCE: invention relates to medical equipment, specifically to easy-to-assemble and high-safety self-decomposing syringes. Syringe comprises a cylinder, rod, piston, a conical connection unit, syringe needle placed in a conical connection unit, and protective cover placed on top of syringe needle for closing and connected with seat of syringe needle. Conical connection unit is arranged in inner cavity of front end of cylinder, piston is arranged on rod, main part of rod is arranged in cylinder, front end of rod is inserted into conical connection unit in injection and to actuate a syringe needle arranged at conical connection assembly for its retraction in cylinder. Conical connection unit comprises threaded conical connector, seal ring, transition part and hollow wedge-like element, wherein lower part of threaded conical connector is inserted into circular groove and ring groove of transition part. Seal ring is tightly fitted between contact surfaces of threaded conical connector, transition part and wall surface of internal cavity of front end of cylinder. Hollow wedge-like element is arranged by insertion in transition part and extends elastic interacting part arranged in lower part of transition part, by means of two circular inclined stepped ledges arranged on hollow wedge-like element to accommodate conical connection unit in inner cavity of front end of cylinder.EFFECT: syringe has simple design, formation thereof requires low accuracy, easy processing, and is therefore most suitable for automatic assembly, and convenient for production in large volumes with stable quality control, and satisfies quantitative market requirements, excludes risk ineffective safety of self-decomposing syringe caused by dangerous assembly or its accidental use and operation.10 cl, 15 dwg |
