DOSE SETTING MECHANISM AND METHOD OF SETTING A DOSE

摘要

A dose setting mechanism comprises a drug delivery device housing and a dual state track provided within the housing that is axially and rotationally fixed with respect to the housing. A dose dial component is positioned in the housing and rotatable during dose setting and dose delivery. A clutch is rotatable during dose setting and non-rotatable during dose delivery. A clutch plate is rotationally fixed relative to the housing; and a clutch blocker is in threaded engagement with the clutch plate and has a radial key engaged with the dual state track. The mechanism may comprise a biasing member positioned between the clutch blocker and clutch plate.