Patent ID: 6938531

Claim:
A reciprocal-movement power tool comprising: a main body; a motor fixed to the main body; deceleration means disposed in the main body and connected to the motor; an output shaft connected to the deceleration means and rotating in a decelerated manner; a feed screw shaft rotatably supported on the main body and connected to the output shaft so as to rotate with the output shaft, the feed screw shaft having a first screw portion; a movement shaft disposed coaxially with the feed screw shaft and having a second screw portion threadingly engageable with the first screw portion of the feed screw shaft, the movement shaft moving back and forth in an axial direction thereof by the threading movement of the second screw portion relative to the first screw portion, the feed screw shaft also having a non-screw portion so that the feed screw shaft is capable of idle rotation when it is disengaged from the movement shaft while being disposed coaxially therewith; a movable body mounted on a tip end of the movement shaft; and, a fixed body supported on a front side of the main body, the output shaft, the feed screw shaft, and the movement shaft being provided coaxially with one another, and the movable body moving back and forth with respect to the fixed body by the movement of the movement shaft; and further comprising a pin protruding from the output shaft, and wherein the feed screw shaft is formed with a slot slanted with respect to the axial direction of the screw shaft, the pin slidingly engaging and extending through the slot.