Patent ID: 7950258

Claim:
A drum type washing machine comprising: a tub for holding washing water, the tub having a wall for mounting a driving unit thereto; a drum installed within the tub; a shaft passed through the tub and coupled to the drum installed within the tub, for transmission of driving force from a motor to the drum; at least one bearing for supporting the shaft; a bearing housing made of metal mounted to the tub for supporting the bearing; a stator; and a rotor around the stator, wherein the rotor and the stator form the motor, wherein the bearing housing is insert molded as one unit with the tub, and the stator is directly attached to the bearing housing; wherein the stator includes; an annular helical type core having multiple layers formed by winding a plate having teeth and a base portion; 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 fastening potions 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 bearing housing, wherein the fastening portion has a fastening hole at a center for fastening the stator to the wall of the tub with screws; and wherein the annular helical type core has no fastening part that is formed on the inside circumferential surface thereof.