Administration mechanism for a medicament delivery device

An administration mechanism for a medicament delivery device, comprising:

• a movable sleeve, and
• a delivery member cover having a distal end portion configured to receive the movable sleeve, and configured to be linearly displaceable between a first position and a second position relative to the movable sleeve,
• wherein the distal end portion has an end face defining a guide surface and the movable sleeve has a radially outwards extending first follower structure configured to cooperate with the guide surface when the delivery member cover is moved from the first position towards the second position, causing the movable sleeve to move.

The administration mechanism as claimed in claim 17, wherein the movable sleeve comprises a radially outwards extending second follower structure and the distal end portion of the delivery member cover has a cut-out configured to receive the radially outwards extending second follower structure, wherein the radially outwards extending second follower structure is configured to cooperate with a wall of the cut-out, causing rotation of the movable sleeve when the delivery member cover is moved from the second position towards the first position.

The administration mechanism of claim 1, wherein the radially outwards extending first follower structure has an oblique surface configured to cooperate with the guide surface.