A safety injection needle device for delivery of a medicament from a storage reservoir with longitudinal axis A. The device includes: a device body； a needle； a needle shield device, and a spring. A rear end of the needle shield device is made of a deformable material such that at least a section of the rear end of the needle shield device is deformed such that the radius of the rear end is increased such that the needle shield device is locked in the extracted position.
