A Power Pack Assembly for a Medicament Delivery Device

A power pack assembly for a medicament delivery device, the power pack comprising:

• a plunger rod extending along a longitudinal axis (L) and having a proximal and an opposite distal end.
• an actuator provided with a holding element and configured to interact with a corresponding holding element of the plunger rod,
• a first force element arranged to exert a force on the plunger rod,
• an actuator sleeve mechanism arranged to releasably lock the holding element in engagement with the corresponding holding element of the plunger rod such as to hold the first force element in a tensioned state, wherein
• the actuator sleeve mechanism comprises an actuator cap configured to hold the holding element in engagement with the corresponding hold element of the plunger rod, and in that an actuator sleeve is interconnected with the actuator cap such that in relation to the actuator, the actuator cap is moved a shorter distance than the actuator sleeve when the actuator sleeve is distally displaced in relation to the distal housing part.

A medicament delivery device comprising a power pack assembly comprising

• a plunger rod extending along a longitudinal axis (L) and having a proximal and an opposite distal end,
• an actuator provided with a holding element and configured to interact with a corresponding holding element of the plunger rod,
• a first force element arranged to exert a force on the plunger rod,
• an actuator sleeve mechanism arranged to releasably lock the holding element in engagement with the corresponding holding element of the plunger rod such as to hold the first force element in a tensioned state, wherein
• the actuator sleeve mechanism comprises an actuator cap configured to hold the holding element in engagement with the corresponding hold element of the plunger rod, and in that an actuator sleeve is interconnected with the actuator cap such that in relation to the actuator, the actuator cap is moved a shorter distance than the actuator sleeve when the actuator sleeve is distally displaced in relation to the distal housing part.