Abstract: In the case of a small-sized motor of the present invention, a printed board to which an electric circuit including an electric element is attached is mounted on a case cover. The printed board has a soldering part to be connected to a member attached to an interior of the case cover for being connected to an electric power source supplied from an outside and a soldering part to be connected to a projection in a notch provided on an opening part side of the metal case to body-earth the electric circuit. In the soldering part for the body-earthing, at the time of assembling the motor, after fitting the case cover to the metal case opening part, a pair of electrodes are brought into contact from an outside of the metal case near the soldering part, to weld the soldering part by a principle of the electric resistance welding.

Abstract: A miniature motor having a metallic case with a printed circuit board installed therein. The printed circuit board has an electronic circuit, mounted thereon, for controlling the miniature motor. A lug portion is provided protruding from the edge of an open end of the metallic case. An engaging portion is provided for engaging the lug portion with an earth terminal of the printed circuit board. The earth terminal and the lug portion are electrically joined by means of soldering in a state the printed circuit board is fitted to the metallic case in such a manner as to engage the lug portion with the engaging portion.