发明名称 |
Speaker apparatus |
摘要 |
A weight is attached to the rear side of a magnetic circuit of a speaker unit. The tip of a boss that projects to the front side from the weight is joined to the rear side of a center pole of the magnetic circuit with a bolt. Even if reactive force that is generated when an electrical signal is converted into mechanical vibration by the magnetic circuit and a voice coil and sound waves are emitted from a vibration plate is transmitted to the magnetic circuit, the vibration of the magnetic circuit is suppressed by the weight. In this manner, sound quality with a good transient characteristic can be obtained.
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申请公布号 |
US6724909(B2) |
申请公布日期 |
2004.04.20 |
申请号 |
US20010986668 |
申请日期 |
2001.11.09 |
申请人 |
FUJITSU TEN LIMITED;TIMEDOMAIN CORPORATION |
发明人 |
TSUMORI KATSUHIKO;NISHIKAWA AKIRA;KOWAKI HIROSHI;YOSHII HIROYUKI |
分类号 |
H04R1/02;H04R1/28;H04R9/02;H04R9/06;(IPC1-7):H04R25/00 |
主分类号 |
H04R1/02 |
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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