Abstract: The autoinjector has a proximal end and, a longitudinal axis A, and a housing configured to receive a medical container having a barrel defining a reservoir for containing a medical product, and said barrel having a distal end provided with a needle and an opened proximal end configured to receive a plunger rod for pushing a stopper arranged inside the barrel. A needle cover is coupled to and movable with respect to said housing between a first extended position, a retracted position, and a second extended position wherein the needle cover moves back in the distal direction to shield the needle. An injection mechanism is configured to move the plunger rod distally inside the barrel in order to expel the medical product contained inside the barrel. A holder is movable with respect to the housing between a passive position wherein the holder does not trigger the injection mechanism and an active position wherein the holder triggers the injection mechanism.

Abstract: The autoinjector includes a housing extending along longitudinal axis (A) and configured to receive a medical container having a barrel defining a reservoir for containing a medical product, said barrel having a distal end provided with an injection needle and an opened proximal end. A power pack arranged inside the housing for expelling the medical product from the medical container. The power pack includes a plunger rod configured to extend through the opened proximal end of the barrel for pushing a stopper arranged inside the barrel. The plunger rod is axially movable between an initial position and an injection end position distally located with respect to the initial position. Resilient adjustment means are arranged between the plunger rod and the barrel for compensating clearances between the plunger rod and the barrel.