Patent ID: 8453901

Claim:
An electric drive tool comprising a driver supporting base, on which a driver for striking a driven member is mounted, and a driving wheel rotated by an electric motor as a driving source, wherein a driving operation for the driven member is performed by converting a rotary movement of the driving wheel into a linear movement of the driver supporting base in order to move the driver in a striking direction, wherein the electric drive tool comprises: a contact trip configured to be pressed against a driven material, into which the driven member is driven, so as to be moved upward; a trigger pulled by a user; a locking mechanism configured to restrict the pull operation of the trigger, the locking mechanism having a lock lever that includes an unlocking part and a locking part and also having a supporting shaft that rotatably supports the lock lever, the lock lever capable to be positioned at a first position and a second position by rotating the lock lever around the supporting shaft such that the pull operation of the trigger can be restricted with the locking part by positioning the lock lever at the first position and can be allowed through the unlocking part by positioning the lock lever at the second position; a trip sensor that detects a movement of the contact trip; a trigger sensor that detects a movement of the trigger; a lock sensor that detects an operation of the locking mechanism; and a control unit that inputs signals output from the trip sensor, the trigger sensor, and the lock sensor; wherein: the control unit controls the driving operation; the driving operation is achieved by performing a first operation for moving the contact trip upward, a second operation for pulling the trigger, and a third operation for releasing the locking mechanism by rotating the lock lever to position the lock lever at the second position and to allow the trigger to be pulled through the unlocking part; and the control unit is programmed to switch an operating mode of the driving operation based on an operational sequence of the first operation and the third operation.