Medicament Delivery Device

A medicament delivery device for obtaining and delivering a reconstituted medicament, comprising:

• a proximal housing part configured to accommodate a multi-chamber container containing at least two agents;
• a distal housing part connected to the proximal housing part;
• a medicament delivery drive unit accommodated in the distal housing part, wherein the proximal housing part and the distal housing part are configured to be movable relative to each other from an extended position to a retracted position, whereby the medicament delivery drive unit acts on the multi-chamber container for mixing the at least two agents and thereby obtains the reconstituted medicament;
• and
• an actuation mechanism provided on the distal housing part and including an actuator provided to engage the medicament delivery drive unit when operated by a user for delivering the reconstituted medicament;
• wherein the medicament delivery drive unit is mounted in the distal housing part so as to be moved, by the proximal housing part when the proximal and distal housing parts are moved from the extended position to the retracted position, from a first position spaced from the actuator to a second position in which the medicament delivery drive unit can be engaged by the actuator;
• and
• the actuation mechanism further includes an activation member that is displaceable between an inactive position, in which the actuator is prevented from engaging the medicament delivery drive unit, and an active position, in which the actuator is able to engage the medicament delivery drive, whereby the actuator is capable of interacting with the medicament delivery drive unit to perform a delivery of the reconstituted medicament only in the active position of the activation member and in the second position of the medicament delivery drive unit.