发明名称 |
Electroacoustic transducer |
摘要 |
An electroacoustic transducer of the present invention includes a diaphragm 3 having a periphery as a fixed end, a coil 4 having an axis perpendicular to the diaphragm 3 and 6 attached centrally to the diaphragm 3, and a direct current magnetic field generator fixed in position as spaced apart from the coil 4 by a gap provided axially of the coil 4. The diaphragm 3 is driven by applying to the coil 4 a magnetic flux emitted from a surface of the direct current magnetic field generator that faces the coil 4. The direct current magnetic field generator includes a ring-shaped outer magnet 5 located coaxially with the axis of the coil 4 and magnetized in the direction perpendicular to the axis, and an inner core 6 including a ferromagnet and located in the central hole of the outer magnet 5. |
申请公布号 |
US8155373(B2) |
申请公布日期 |
2012.04.10 |
申请号 |
US20070928281 |
申请日期 |
2007.10.30 |
申请人 |
KOSUDA KAZUYUKI;HATANAKA YUKI;SANYO ELECTRIC CO., LTD. |
发明人 |
KOSUDA KAZUYUKI;HATANAKA YUKI |
分类号 |
H04R1/00;H04R9/06;H04R11/02 |
主分类号 |
H04R1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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