Auto-injector

An autoinjector comprising:

• a body receiving a reservoir, said reservoir containing fluid and including a piston;
• a piston rod that is adapted to co-operate with the piston of said reservoir, said piston rod being movable by an injection spring between a primed position and an injection position in which said piston rod has moved the piston of the reservoir so as to inject the fluid into an injection site;
• and
• an indicator device for indicating to a user that said autoinjector may be removed from said injection site;
• said autoinjector further comprising a retarding system so as to delay an end of actuating said indicator device relative to an end of injection, said indicator device generating a continuous noise while being actuated, said noise being generated until the end of actuating said indicator device, said indicator device and/or said retarding system including a rotary element with respect to said body, said continuous noise being generated during said rotation by one or more flexible tabs formed either on said rotary element or on said body, and cooperating with corresponding profiles formed on said rotary element when said one or more flexible tabs is formed on said body and on said body when said one or more flexible tabs is formed on said rotary element.