Patent ID: 7983431
Filing Date: 2011-07-19
Classification: H04R

Abstract:
1. A bone conduction device, which is a magnetic type acoustic converter device having an outer magnetic type construction in which a voice coil is mounted on a center magnetic pole of a yoke, while magnets are disposed outside said voice coil, characterized in that: each of said yoke and said center magnetic pole is vertically elongated in shape; each said magnet is disposed on a side end part of each of opposite shorter sides of said yoke; and, a tympanum fixing part for fixing a tympanum is disposed outside each of said magnets, wherein said tympanum fixing part is aligned with each magnet arrangement axes on which each of said magnet is arranged, and said tympanum has each of its opposite ends extended and bent at an end part to form a bent part; and has said bent part fixed to said tympanum fixing part.