Novo Nordisk A/S
DRUG DELIVERY DEVICE COMPRISING AN ADJUSTMENT MEMBER

Abstract:

The present invention relates to a drug delivery device that houses a piston equipped cartridge and a drive mechanism comprising a piston rod (170) configured for axially moving the piston in a distal direction. An adjustment member (150) connects to the member (150) comprises a first contour system (175) defining a plurality of steps (175', 175'', 175''') being circumferentially disposed and arranged axially offset from one another. The other of the piston rod (170) and the adjustment member (150) comprises at least one radially disposed protrusion (155). For eliminating an axial clearance between the piston rod (170) and the piston of the cartridge the at least one radially disposed protrusion (155) axially engages a selective one of said plurality of steps (175', 175'', 175''') so that the relative rotational position between the piston rod (170) and the adjustment member (150) is decisive for the axial position of the adjustment member (150) relative to the piston rod (170).