Patent ID: 7418894

Claim:
A laser unit to be attached to a cutter including a base for supporting a workpiece; a holder supported on the base portion; and a cutter blade portion adapted for supporting a circular saw blade that cuts the workpiece, the cutter blade portion being supported on the holder so as to be movable between an upper position and a lower position, the cutter blade portion being closer to the base in the lower position than in the upper position; the circular saw blade having a rotation axis and a blade edge in a circumferential direction of the circular saw blade, the blade edge having a width in a direction of the rotation axis, said width being bounded by two parallel planes of the circular saw blade; the laser unit comprising: a laser generator that irradiates laser light to be shown onto a position to be cut on the workpiece, the laser generator having a first side that extends in a cross-direction of the laser light; a laser generator support member supporting the laser generator and attached to one of the holder and the cutter blade portion, the laser generator support member having an abutment surface that extends in a direction of the rotation axis and is abutted to the first side of the laser generator; a screw member supported to the laser generator support member for moving the laser generator in a direction of the rotation axis of the circular saw blade; a first resilient member interposed between the laser generator support member and the laser generator for urging the laser generator in a direction of an axis of the screw member; and a second resilient member for urging the laser generator to the abutment surface.