Drive subassembly for a drug delivery device

Abstract

The present disclosure relates to a drive subassembly for a drug delivery device, the drive subassembly comprising a proximal housing part comprising a body portion and a closure portion configured as separate parts adapted to be coupled to each other, the closure portion comprising an end face and a guide rod extending from the end face in a distal direction, the guide rod adapted to be inserted into a drive spring; and a plunger, wherein the body portion comprises a profiled slot adapted to engage a plunger boss of the plunger to impede movement of the plunger in the distal direction unless the plunger is rotated to move the plunger boss out of the profiled slot. The disclosure furthermore relates to a proximal housing part for a drug delivery device, to a method for assembling the drive subassembly and to a method for assembling the drug delivery device.

Dependencies are inferred from the claim text.