| 摘要 |
PROBLEM TO BE SOLVED: To obtain an electromagnetic transducer by using a vibrating diaphragm having enhanced rigidity. SOLUTION: An electromagnetic transducer includes a permanent magnet plate where different magnetic poles are magnetized alternately at constant intervals, and a diaphragm arranged opposite to the permanent magnet plate and having a coil consisting of a meandering conductor pattern formed on the surface of a low density and high rigidity supporting plate at a position opposite to the interval portion of different magnetic poles of the permanent magnet plate, and vibrates in the thickness direction by coupling magnetically with the permanent magnet plate when a current is conducted through the conductor pattern. COPYRIGHT: (C)2010,JPO&INPIT
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