| 摘要 |
A bone conduction device which has a simple structure, can be formed easily into a thin shape, causes small leakage flux, and exhibits good performance. The bone conduction device comprises a base yoke (1) bearing a voice coil (3) and a magnet (4), and a plate-shaped front yoke (5) arranged with a required gap between the upper surface of the magnetic pole of the base yoke (1) and the front yoke (5) and is characterized in that the gap is kept by means of an elastic body (6) receiving the front yoke (5) and disposed at the peripheral edge part of the base yoke (1). Preferably, the base yoke (1) has a circular base (7), and the elastic body (6) has an arcuate shape along the base (7). ® KIPO & WIPO 2007
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