DISPOSABLE SAFETY SYRINGE WHICH SEALS UP CONNECTION OF NEEDLE FIXING TUBE

摘要

PURPOSE: A disposable safety syringe which seals up the connection of needle fixing tube using an adapter and inserting tube, is provided to completely seal up the connection of the needle fixing tube by using an adapter tube and an inserting tube as an intermediate member instead of a deformation-sensitive O-ring. CONSTITUTION: The disposable safety syringe includes: a cylinder(101) which has a space withinside and whose front side as one end and rear side as other end are connected with each other in an opened state; a push rod(103), inserted into the space of the cylinder(101); a piston(104), connected to the front portion of the push rod(103) and moving in the state of the airtight contact with the cylinder(101), so as to supply the latter(101) with a compression or suction force; an adapter tube(105), fitted into the front end of the space of the cylinder; an injection port(106); an inserting tube(107), maintaining the airtight state of the cylinder; a needle fixing tube(109); a pressurizing piece(112); an inserting-tube moving member; and an adapter-tube moving member.