Injection syringe having retractable injection needle for medical applications, has liquid holder with outlet opening, plunger having plunger head, injection needle with needle amount mounted on outlet opening of holder

摘要

An injection syringe having retractable injection needle, has liquid holder with outlet opening, plunger inside liquid holder has plunger head with plunger rod, injection needle with needle mount in outlet opening of holder, needle mount of needle, plunger head has coupling unit, and outlet opening of holder has blocking unit. Injection syringe (1) having a retractable injection needle (2), at least comprising a liquid holder (3) having an outlet opening (4), a plunger (5), which can be displaced inside the liquid holder and has a plunger head (6) to which a plunger rod is or can be secured, an injection needle with needle mount (8), which is or can be molded in or on the outlet opening of the liquid holder, the needle mount of the injection needle and the plunger head has coupling unit which are designed such that they can be coupled unambiguously to one another in order that, after the plunger head has been removed completely into the liquid holder in order to discharge liquid present in the liquid holder through the outlet opening, the injection needle, after the plunger head has been coupled to the of the injection, can be drawn into the liquid holder, the coupling unit of the needle mount being designed in the form of recess with an inwardly directed collar (11), and the coupling unit of the plunger head being designed in the form of projecting element (12) with a thickened end (13), and the outlet opening of the liquid holder has blocking unit (15) which is designed to block the needle mount in the outlet opening and can be unblocked when the plunger head is coupled to the needle mount of the injection needle. Independent claims are included for the following: (1) needle mount clearly intended for an injection syringe; (2) plunger head clearly intended for an injection syringe; and (3) liquid holder clearly intended for an injection syringe.