Drive assembly for a medicament delivery device

A feedback assembly for a medicament delivery device comprising:

• a tubular sleeve having a longitudinal axis and comprising a flexible finger biased radially inward towards the longitudinal axis;
• a plunger rod positioned within the tubular sleeve and having an outer surface comprising a longitudinal feedback track and two protruding wings located at a distal end;
• and
• a resilient member engaged with the plunger rod that biases the plunger rod in a proximal direction,
• wherein, when the plunger rod is in a non-activated state, the flexible finger is not engaged with the feedback track and the plunger rod is axially fixed relative to the tubular sleeve, and
• wherein, when the plunger rod is in an activated state, the resilient member pushes the plunger rod axially to a final position such that the plunger rod will move axially relative to the tubular sleeve such that the flexible finger will engage the longitudinal feedback track to provide audible or tactile notification of medicament being expelled from a medicament container positioned with the medicament delivery device.