Injection device with a coupling

摘要

The device has a torque application device for applying a torque to a section (16c) of a coupling element (16) around a longitudinal axis (L). An engagement element (16f) is pushed into a toothing via the torque such that rotation of the coupling element relative to a sleeve is blocked in a rotational direction. Another section (16d) of the coupling element is twisted relative to the former section around the axis in the rotational direction such that engagement of the engagement element in the toothing is released to enable the rotation of the coupling element in the rotational direction. The torque application device is designed as a torsion spring or a discharge spring. An independent claim is also included for a driving and/or dosing device for an injection device administering a liquid product i.e. medicinal drug.