| 摘要 |
An injection device 210 comprising a housing 212 adapted to receive a syringe 214 having a discharge nozzle 218 and including means for biasing the syringe 214 from an extended position in which the discharge nozzle 218 of the syringe 214 extends from the housing 212 to a retracted position in which the discharge nozzle 218 is contained within the housing 212, an actuator, a drive acted upon by the actuator and in turn acting on the syringe 214 to advance it from its retracted position to its extended position and discharge its contents through the discharge nozzle 218, a release mechanism, activated when the drive has been advanced to a nominal release position, to release the syringe 214 from the action of the actuator, whereupon the biasing means restores the syringe 214 to its retracted position, and a locking mechanism that confines the returned syringe 214 in its retracted position, wherein the housing 212 includes a syringe carrier adapted to receive the syringe 214 and the biasing means is adapted to bias the syringe carrier from an extended position to a retracted position, and wherein the locking mechanism prevents the drive from retracting relative to the syringe carrier, thus confining the syringe 214 between the drive and the syringe carrier.
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