| 摘要 |
A dose metering mechanism for use in administering doses of an injectable product from an injection device, the dose metering mechanism including a rack with teeth, a feed sleeve displaceable relative to the rack, a first catch element associated with the feed sleeve for latching in the teeth of the rack, a guide piece relative to which the rack is movable, a second catch element associated with the guide piece for latching in the teeth of the rack, and a latching control device associated with the toothed rack for controlling the latching of at least one of the first and second catch elements in the teeth of the rack. A method of preparing to administer and administering doses of an injectable product from an injection device including the dose metering mechanism is encompassed.
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