DISPOSABLE SAFETY SYRINGE ENABLING PERFECT SEALING OF FIXED MEMBER OF THE SYRINGE USING TUBE TYPE GASKET

摘要

PURPOSE: A disposable safety syringe is provided to cause a member used to fix a syringe needle to be tilted upon receiving an external forcible eccentric force, thereby preventing the needle from being unintentionally taken out of the syringe upon disposal of the used syringe irrespective of operation of a pusher rod. CONSTITUTION: The disposable safety syringe comprises: a cylinder(101) having a stepped injection discharge portion(102); an adaptor tube(105) fitted in the discharge portion to partially protrude to the outside of the cylinder; a gasket(106) for sealing the adaptor tube and the cylinder relative to each other; a fixing member(108) fitted at an outwardly protruded portion of the adaptor tube for fixing a syringe needle(107); a tapered press piece(103a) formed at a pusher rod(103) to apply eccentric force to the adaptor tube when the press piece is inserted into the adaptor tube; and fitting holes(105b) formed at the adaptor tube and fitting protrusions(103b) formed at the press piece.