Patent ID: 7615895

Claim:
An outer rotor type motor for a drum type washing machine comprising: an annular stator core having multiple layers formed by winding a base portion in a shape of stripe with Ts projected from the base portion in a helix starting from a bottom layer to a top layer; an insulator insert molded to cover an outside surface of the stator core for insulating the stator core electrically; fastening portions formed as one body with the insulator each projected from an inside circumferential surface of the stator core toward a center of the stator, for fixedly securing the stator to the tub, wherein the base portion of the stator core has an arc shaped slots each for reducing stress in winding the core as well as serving as a portion of a fastening hole, and each of the fastening portion of the insulator formed to cover the slots has a fastening hole formed therein; and an outer rotor of steel plate having a bottom, a sidewall extended from the bottom in perpendicular thereto substantially, and magnets on an inside of the sidewall, wherein the rotor frame and a back yoke are formed as one unit so that the rotor frame also serves as the back yoke, and the rotor frame has one coat of synthetic resin applied to at least an outside surface of the rotor frame.