INJECTION DEVICE

摘要

An injection device for administering a liquid is presented that comprises a pre-filled syringe and a safety mechanism for providing needle safety for an injection needle of the pre-filled syringe. The pre-filled syringe comprises a barrel containing the liquid and a stopper translatably disposed within the barrel, where the injection needle attached to a distal end of the barrel. The safety mechanism comprises a substantially cylindrical housing adapted to contain the pre-filled syringe, a plunger connectable to the stopper of the pre-filled syringe and adapted to be translated in a distal direction (D) to expel the liquid through the injection needle, an energizable biasing means arranged between the housing and the pre-filled syringe, wherein the energized biasing means is capable of biasing the pre-filled syringe with respect to the housing in a proximal direction (P) and a retaining mechanism for retaining the pre-filled syringe with respect to the housing in a first retracted position (R1), in an advanced position (A) and in a second retracted position (R2).