abstract |
Drive Mechanisnn of a Drug Delivery Device The present invention relates to a drive mechanism of a drug delivery device for dispensing of a dose of a medicament, the mechanism comprising: —a housing ( 30 ) extending in an axial direction ( 1, 2 ), —a piston rod ( 90 ) to operably engage with a piston ( 16 ) of a cartridge ( 14 ) to displace the piston ( 16 ) in an axial distal direction ( 1 ), a last dose sleeve ( 100 ) rotatably supported in the housing (30) and being selectively engageable with a dose setting mechanism for setting of a dose, —a last dose member ( 105 ) threadedly engaged to the housing ( 30 ), rotatably locked to the last dose sleeve ( 100 ) and axially displaceable relative to the last dose sleeve ( 100 ). |