Patent ID: 6944934

Claim:
A manufacturing method for forming a small-sized motor, the method comprising steps of: providing a hollow cylindrical metal case having a bottom and having an open end; attaching a magnet to an inside periphery of the hollow cylindrical metal case; forming a rotor by providing a shaft with a laminated core, providing a winding wound around the laminated core and attaching a commutator to the shaft; inserting the rotor into the hollow cylindrical metal case; providing a synthetic resin case cover; providing printed boards including a circuit board having an electric circuit including an electric element mounted thereto and another circuit board having an electric circuit including plural electric elements mounted thereto, each printed board being provided with a soldering part for connection to a member attached to the interior of the case cover for being connected to an electric power source supplied from the outside and a body ground soldering part for connection to a projection in a notch provided on the open end side of said metal case for a body ground for the electric circuit; selecting one of the circuit boards and attaching the selected printed board to the synthetic resin case cover; fitting the synthetic resin case cover to the case to close the open end of the case; after fitting said case cover to the metal case open end applying a pair of electrodes to contact the metal case from the outside near a location of the ground soldering part to weld the ground soldering part by electric resistance welding to the case.