LOCKING AND INTERCEPTING MECHANISM OF THE NEEDLE FOR A SAFETY SYRINGE

摘要

The invention deals with a locking and intercepting mechanism of the needle for a safety syringe. The edge of the conical tapering for the introduction of the conical extension of the plunger there is an intercepting groove or narrowed bottom edge adapted for interaction with the perimeter edge of the base of this conical extension of the plunger while its principle is that the perimeter edge (2141 ) of the base (210) of the conical extension (21) of the plunger (2) is adapted for increased flexibility in the radial direction by means of creation of an annular groove (215) on the surface of the base (210) of the conical extension (21) of the plunger (2) in the vicinity of the perimeter edge (2141 ) of the base (210) of this conical extension (21), and/or by creation of an overlap (214) of the casing (213) over the base (210) of this conical extension (21 ) and/or by creation of radial grooving (2142) in the form of relief slots along the perimeter of the perimeter edge (2141) of the base (210) of this conical extension (21) of the plunger (2).