发明名称 Electroacoustic transducer and electronic apparatus with such a transducer
摘要 In an electroacoustic transducer of the present invention, a casing supports a diaphragm, a drive coil is provided on the diaphragm, a first magnetic structure has a first space in a center thereof provided within the casing such that a center axis penetrates the first space, and a second magnetic structure has a second space in a center thereof provided within the casing on a side opposed to the first magnetic structure with respect to the diaphragm, such that the center axis penetrates the second space. The first magnetic structure is oriented such that a magnetization direction thereof is parallel to the center axis. The second magnetic structure is oriented such that a magnetization direction thereof is opposite to the magnetization direction of the first magnetic structure.
申请公布号 EP1434463(A2) 申请公布日期 2004.06.30
申请号 EP20030029407 申请日期 2003.12.19
申请人 PANASONIC CORPORATION 发明人 USUKI, SAWAKO;SAIKI, SHUJI
分类号 H04R1/28;H04R9/02;H04R9/04;(IPC1-7):H04R9/02;H04R9/10 主分类号 H04R1/28
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