A board mounted structure of a vibration motor which self aligns along
with melting of cream solder even if deviation occurs in positioning of
the flat bottom surface of a metal holder frame and a fastening pattern
at the time of automatic mounting, that is, a board mounted structure
having a vibration motor having a metal holder frame into which a motor
case is fit and a pair of external terminal pieces attached to a plastic
end cap and a printed circuit board having a fastening pattern shaped
left-right symmetric about a center line and superposed with a bottom
surface of the metal holder frame and power feed patterns adjoining this
fastening pattern, arranged left-right symmetrical with respect to a
center line, and superposed with corresponding external terminal pieces,
the metal holder frame having front projecting pieces and a back
projecting piece at its flat bottom surface, the fastening pattern having
front extending pattern surfaces superposed with corresponding front
projecting pieces and a back extending pattern surface superposed with
the back projecting piece at its main fastening pattern surface.