Safety device for shielding an injection needle of a medical container, and an injection device including this safety device

A safety device for mounting onto a medical container provided with a flange and an injection needle, the safety device comprising:

• a tubular body extending along a longitudinal axis, the tubular body being configured to receive the medical container,
• a needle cover movable relative to said body between a retracted position, and an extended position in which the needle cover distally extends from the retracted position in order to shield the injection needle after activation of the safety device,
• a release element configured to move the needle cover from the retracted position to the extended position after activation of the safety device,
• a retainer, the retainer being configured to transmit an activation force applied to the retainer in a distal axial direction to the needle cover once an injection operation is completed, such that the activation force transmitted to the needle cover causes the needle cover to move from the retracted position to the extended position,
• wherein the needle cover comprises a distal abutment surface, said distal abutment surface abutting against a proximal abutment surface of a bump protruding from a distal portion of the body in the retracted position of the needle cover, and
• wherein the body has a first axial slot extending from a distal end of the body, the first axial slot has a proximal end, said proximal end being proximally located with regard to the bump, and the bump is circumferentially distant from said first axial slot.