Disposable syringe.

摘要

A syringe with a system for disabling it after use is disclosed. It is disabled by retraction of the needle (1) by pressing the end part of the plunger so that a harpoon-shaped tip (11) attached to the end part plunger locks into the inner needle casing. The cylinder includes a part (10) in which various fin-shaped lugs (14) moulded on the body of the end part of the plunger engage, so that once the needle (1) has been retracted, the end part of the plunger, which is connected to the needle (1) remains inside the cylinder and cannot be removed. The syringe can comprise spring to facilitate automatic retraction of the needle (1).