| 摘要 |
Disclosed is a device for injection of a medicament into a human or animal body, the device comprising: a housing having a medicament chamber containing a medicament to be injected; an injection needle communicating with the medicament chamber; a plunger in operable linkage to the needle, said plunger and needle being movable between a storage position, in which the needle is fully retracted within the housing, and a delivery position in which at least the tip of the needle projects beyond the housing; releasable retaining means for retaining the plunger in the storage position; means for applying a propulsive force to the plunger, the propulsive force being operative, when the retaining means are released, to propel the needle from the storage position to the delivery position and then to inject the medicament from the chamber into and through the injection needle; means for reducing the propulsive force; and injection needle return means operative to return the needle from the delivery position to the storage position after the injection of the medicament.
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