H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 1/00 (2006.01) H04R 1/02 (2006.01)
Patent
CA 2558300
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).
Un dispositif à conduction osseuse de structure simple pouvant être façonné facilement en une forme mince, entraînant une faible dispersion de flux et présentant de bonnes performances. Ce dispositif de conduction osseuse comporte une bobine de base (1) portant une bobine mobile (3) et un aimant (4) ainsi qu'une bobine avant en forme de plaque (5) disposée avec un espacement requis entre la surface supérieure du pôle magnétique de la bobine de base (1) et la bobine avant (5), et se caractérise par le fait que l'espacement est maintenu au moyen d'un corps élastique (6) recevant la bobine avant (5) et disposé à la périphérie de la bobine de base (1). La bobine de base (1) a une base circulaire (7) et le corps élastique (6) a une forme arquée le long de la base (7).
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Temco Japan Co. Ltd.
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