Patent ID: 7494036
Filing Date: 2009-02-24
Classification: B25C

Abstract:
1. An electric driving machine comprising: a housing having a fastener driving section at one end; a magazine which is disposed in association with the fastener driving section of the housing, holds a plurality of fasteners in an aligned manner, and sequentially supplies the fasteners to the fastener driving section; a flywheel capable of accumulating rotational kinetic energy; a motor which is mechanically connected to the flywheel and which rotationally drives the flywheel; actuator feeding means for converting rotational drive force of the flywheel into rectilinear drive force and transmitting the rectilinear drive force to a driver blade which fires the fastener supplied to the driving section; a power transmission section which transmits the rotational drive force of the flywheel to the actuator feeding means or interrupts transmission of the rotational drive force; engagement/disengagement means for controlling the power transmission section to an engaged state or a disengaged state; control means which controls the motor and the engagement/disengagement means in response to operation of a push lever switch and operation of a trigger switch and which has a power terminal for supplying a source voltage and a reset terminal for supplying a reset signal at the time of supply of the source voltage; a battery pack provided as a source for supplying electric power to, the control means, the motor, and the engagement/disengagement means; and a power circuit which has a voltage supply channel and which lowers a voltage of the battery pack to a predetermined voltage and outputs the thus-lowered voltage to the voltage supply channel, the driving machine comprising: a backup power circuit includes