Sub-assembly of a medicament delivery device

Abstract

The present disclosure relates to a sub-assembly of a medicament delivery device comprising a plunger rod configured to be moveable inside the medicament delivery device, a spring abutting the plunger rod in one end and abutting an inner wall of the sub-assembly in another end to compress the spring upon the plunger rod being moved towards a distal end of the medicament delivery device, an arm extending axially and being immovable with respect to a housing, the arm having a radially extending end section, an inner surface of which end section pressing radially against the spring-loaded plunger rod to axially fix the spring-loaded plunger rod relative to the arm, a rear wall member axially movable from a lock position where an inner wall of the rear wall member radially encloses an outer surface of the arm to a release position where the rear wall member is radially offset relative to the outer surface of arm, a radially flexible tab having an axially directed surface adjacent to a counter surface of an engagement member to form an axial abutment preventing the rear wall member from moving into the release position, and a release member configured to be axially moved into contact with a radial protrusion of the flexible tab to radially deflect the flexible tab, thereby radially offsetting the axially directed surface from the counter surface of the engagement member.

Dependencies are inferred from the claim text.