| 摘要 |
A needleless injector includes a tubular barrel including a front section for receiving a disposable syringe; middle and rear sections containing a hammer and a compression spring for driving the hammer forwardly against the syringe plunger, a compression screw in the front section and threaded into the middle section for compressing the spring, a rear lock assembly for locking the hammer in a cocked position, and an actuating button for releasing the hammer, whereby the hammer drives against the syringe plunger to eject liquid from the syringe. |
