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.
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
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