The present invention relates to a safety injection needle device (10) fordelivery of amedicament from a storage reservoir (100) with longitudinal axis A, saiddevice (10)comprising: a device body (11)； a needle (30)； a needle shield device (40),and aspring, wherein the rear end of the needle shield device is made of adeformablematerial such that at least a section of the rear end of the needle shielddevice isdeformed such that the radius of the rear end is increased such that theneedle shielddevice is locked in the extracted position.
