| 摘要 |
A medical injector apparatus includes a syringe having a barrel with a lateral projection, a needle, a plunger in the barrel having a portion extending from the barrel opposite the needle. The injector apparatus has a body having a forward end for the needle and a rearward end portion of the extending portion of the plunger; a trigger rearwardly movable from in front of the body by pressure from the flesh of a user; a receiver for holding the syringe axially aligned with the body, including a guide having a cavity for releasably holding the barrel and having a lateral opening for radial movement of the barrel into the cavity; an aligner holding the syringe in lateral alignment with the body during insertion of the syringe into the receiver, including opposite entry surfaces at a forward extremity of the guide for laterally centering a contacted portion of the barrel, and a rear guide located rearwardly of the entry surfaces for laterally centering a rear portion of the syringe; the syringe being movable in the body from a first position forwardly to a second position, the needle projecting beyond the trigger surface in the second position for piercing the flesh; an actuator for forwardly moving the plunger; a catch for preventing operation of the actuator; and a releaser connected to the trigger for releasing the catch, whereby the actuator moves the plunger forwardly in the barrel, the syringe being moved from the first position to the second position during an injection.
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