Magnetic plunger rod re-setting mechanism and plunger rod lock

摘要

An injection device which can accommodate an ampoule, the device including a plunger rod which can be moved out of an initial position in a dispensing direction and is thus able to act on a plunger associated with the ampoule, a magnetic member whereby the plunger rod can be moved along its longitudinal axis relative to the magnetic member, a magnetic counter-member disposed on the plunger rod, wherein the magnetic member and the magnet counter-member magnetically co-operate in at least one position of the plunger rod.