| 摘要 |
A drug delivery device for dispensing one or more doses of a drug is provided. The device comprises a drive member (1) for driving a piston rod (not shown) and a dose member (46) for actuating the drive member (1). The piston rod is coupled to the drive member (1) such that a relative translational movement of the drive member (1) and the piston rod is allowed and a relative rotational movement is prevented. The drive member (1) is configured to be driven by the dose member (46) around the longitudinal axis in a first (110) and a second rotational direction (111) opposite to each other. Furthermore, a drug delivery device (4) is provided, wherein the drive member (1) has stable and unstable states and wherein in an unstable state the drive member (1) is biased by biasing means (not shown) towards a stable state. |
