Patent ID: 6913591

Claim:
A personal injector for liquid medicine comprising: a housing having a distal end and a proximal end and including a needle-mounting part, a medicine container holder, and a connecting port to a computer; a plunger arranged in said housing and adapted to be longitudinally moved between a starting point and a forward limit point within the housing; an electric motor for driving said plunger; a limit switch arranged at the forward limit point to stop the forward movement of said plunger; a starting point sensor for detecting return of the plunger to the starting point; and a substrate arranged in said housing and provided with a display, a mode-select switch, and a confirmation switch; wherein the confirmation switch confirms an on-state of the starting point sensor, a set mode of the injector, and a notice of an administration of the liquid medicine, and wherein said plunger is adapted to be moved to the starting point by the reverse driving of the motor when said limit switch is turned on.