Sanofi
Medicament injection device

Abstract:

A medicament injection device is provided. The device includes a main body configured to receive a medicament cartridge sealed with a penetrable holder. The device can further include a needle holder holding a needle, a needle sleeve arranged to be axially movable with respect to the main body, and a retainer coupled to the needle holder and to the needle sleeve. The retainer can be axially movable with respect to the main body along the main axis of the device. Upon displacement of the needle sleeve and the retainer by a predefined distance towards a proximal end of the main body, the needle holder and the needle can be displaced axially towards the proximal end of the main body and decouple from the retainer. The needle sleeve can be configured to disengage from the needle holder upon displacement of the needle sleeve.