BYPASS TYPE NEEDLEFREE INJECTOR

摘要

PURPOSE: A bypass type automatic needless syringe is provided to simplify the structure of the bypass type automatic needless syringe and to deliver the dosage appropriate for various prescriptions by controlling the dosage contained in the syringe. CONSTITUTION: A bypass type automatic needless syringe comprises a power(10)unit for returning a piston by using the combination of a motor and gears; a compression unit(11) using the trigger pulling operation and the spring force to operate a piston to supply the pressure for the dose injection; an injection unit injecting the supplied dose(12) through the injection port of the front end by the operational force of the piston; and a feeding unit(13) supplying the dose to the inside of the injection unit. The power of spring is used as the energy source for the dose injection. The power unit comprises multiple gears and a motor.