Patent ID: 7520148

Claim:
A drum type washing machine comprising: a tub of plastic for holding washing water, the tub having a wall for mounting a driving unit thereto; a drum mounted on an inside of the tub; a shaft passed through the tub and coupled to the drum mounted inside of the tub, for transmission of driving force from a motor to the drum; at least one bearing for supporting the shaft; a bearing housing insert molded in the plastic tub for supporting the bearing; a stator to form the motor with a rotor; the rotor around the stator; and a tub supporter of metal between the wall of the tub and the stator, wherein the stator includes; an annular helical type core having multiple layers formed by winding a steel plate having Ts and a base portion in a helix starting from a bottom layer to a top layer, an insulator insert molded with the helical type core to cover an outside surface of the helical type core for electrical insulation of the helical type core, and three fastening portions formed as a unit with the insulator projected from an inside circumferential surface of the helical type core toward a center of the stator, for fastening the stator to the tub supporter, wherein the fastening portion has a fastening hole at a center for fastening the stator to the wall of the tub with screws.