Sanofi
Drug delivery device

Abstract:

A drug delivery device comprises a medicament reservoir attached to a housing, a drive mechanism comprising a plunger movable relative to the housing, a dose selecting element releasably coupled to the drive mechanism and rotatable relative to the housing, a trigger axially movable relative to the housing, and a limiter selectively permitting and preventing axial movement of the trigger depending on the amount of a selected dose. The limiter is constrained to the dose selecting element and to the trigger. One of the limiter or a component part is axially coupled to the housing comprises a track which is in engagement with a blocking feature of the other of the limiter or the component part axially coupled to the housing. The track comprises a narrow section limiting relative movement between the track and the blocking feature and a wide section permitting relative movement between the track and the blocking feature.