Patent ID: 8588456
Filing Date: 2013-11-19
Classification: H04R

Abstract:
1. An acoustic conversion device comprising: a driving unit including (a) a yoke, (b) a pair of magnets disposed so as to face one another, the pair of magnets attached to the yoke, (c) a coil configured to receive a driving current, (d) a vibrating portion passed through the coil and configured to vibrate when the driving current is supplied to the coil, and (e) an armature disposed between said pair of magnets; and a diaphragm unit including (a) a holding frame having an opening, (b) a resin film attached to the holding frame, the resin film at least covering the opening of the holding frame, (c) a diaphragm on the inner side of the holding frame, the diaphragm attached to the resin film, and (d) a beam, wherein,