| 摘要 |
An improved multi-dose injector comprising a body portion, an ejector nozzle mounted at one end of said body portion, including a discharge orifice, an exit passage in said body portion leading to said orifice, powerized means for ejecting measured doses of liquid under pressure through the exit passage and out of the orifice against the epidermis of the recipient, the apparatus being characterized by a pressure sensitive trigger mechanism whereby triggering of the dose releasing apparatus is effected only after a predetermined pressure of the trigger mechanism against the subject is sensed. The trigger apparatus assures optimal and predictable administration of a medicament by initiating an operative cycle only when the injector is pressed against the subject with a selected force, while preventing accidental or inadvertent firing. In addition, the novel trigger mechanism reduces the likelihood of slippage or movement of the apparatus relative to the subject during administration of a dosage.
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