<p>An earphone jack is fixed on a printed circuit board by soldering as well as a first holding rib and a second holding rib for holding in the horizontal direction and a third holding rib for holding in the perpendicular direction with respect to the printed circuit board are provided on a shield case. The shield case is held in the perpendicular direction with respect to the printed circuit board by a fourth holding rib provided on the case. <IMAGE></p>
