| 摘要 |
A device for administering an injectable product includes a housing, a reservoir for the product, a plunger axially displaceable in a forward-drive direction in the reservoir which effects a dispensing stroke in the forward-drive direction to dispense the product, and a priming mechanism, displaceable in the forward-drive direction and acting on the plunger to permit a priming stroke in the forward-drive direction to remove air from the reservoir. In one embodiment, the device is an auto-injector wherein a dispensing spring acts on the plunger rod in the forward drive direction, the rod being locked in a retaining position in a releasable retaining engagement against the force of the dispensing spring, and wherein a dose metering element is disposed on the housing so it can be displaced to set a product dose and is coupled with the plunger rod by a dose metering engagement so that a dose metering movement of the dose metering element causes an axial displacement of the plunger rod or a stop for the plunger rod when the retaining engagement is in effect.
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