Patent attributes
The present invention relates to an electronically assisted injection device adapted to inject doses of a drug from a held cartridge. The injection device may include a first rotational sensor (40) coupled to a driver (6) for sensing a dose setting and a second rotational sensor (50) coupled to a dosing member (8) for sensing an expelled dose. A third axial sensor (60) provides information relating to the axial position of the driver (6). A control circuit is adapted to determine the end of dosed state based on data from the first, the second and the third sensors (40, 50, 60). The injection device may also include an arrangement for determining fluid ingress into the interior of the injection device. The arrangement includes an electrically non-conductive surface portion (63) disposed on a first component (6) and an electrode assembly (62a, 62b, 62c) disposed on a second component (80) wherein the first component (6) and the second component (80) moves relative to each other during operation.
