Dose setting mechanism and method of locking an injection pen

Abstract

A dose setting mechanism configured to set a desired dose for an injection device, the dose setting mechanism includes a housing, a dose setting knob, a dose setting device and a coupling element. The dose setting knob is configured to set the desired dose by a compulsory guided combined axial and rotational movement of the dose setting knob relative to the housing. Upon drug delivery, the dose setting knob is moved axially relative to the dose setting device or the housing and the coupling element is configured to engage at least one of the dose setting device and the housing to thereby permanently axially lock the dose setting knob to the respective one of the dose setting device and the housing.

Dependencies are inferred from the claim text.