DISPOSABLE SAFETY SYRINGE ENABLING PERFECT SEALING OF FIXED MEMBER OF THE SYRINGE USING TUBE TYPE GASKET AND CAPABLE OF PREVENTING A SYRINGE NEEDLE FROM BEING UNINTENTIONALLY TAKEN OUT OF THE SYRINGE

摘要

PURPOSE: A disposable safety syringe is provided to prevent a syringe 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 out of the cylinder; a tubular gasket(106) for sealing between the adaptor tube and the cylinder in an air-tightness manner; 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 distal end of a pusher rod(103) to apply eccentric force to the adaptor tube when it is inserted into the adaptor tube; and fitting holes(105b) formed at the adaptor tube and fitting protrusions(103b) formed at the press piece.