发明名称 Loudspeaker
摘要 <p>The loudspeaker includes: a frame; a magnetic circuit portion; a diaphragm transmitting air vibration; a cylindrical voice coil bobbin connected to the diaphragm; a voice coil fixed to an outer peripheral portion of the voice coil bobbin; and a damper holding the voice coil in such a manner that the voice coil is capable of vibrating in a magnetic gap formed between an annular top plate and a center pole included in the magnetic circuit portion. The damper includes a flat portion which has a hole for passing the voice coil bobbin therethrough at its center, and a plurality of roll structures connected to a periphery of the flat portion and having a cross-section including a bent periphery. Each of the plurality of roll structures is fixed to the frame, and the hole of the flat portion is fixed to an outer peripheral surface of the voice coil bobbin.</p>
申请公布号 EP0836362(A2) 申请公布日期 1998.04.15
申请号 EP19970117471 申请日期 1997.10.09
申请人 MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 发明人 TAKEWA, HIROYUKI;KIKKAWA, TOHRU;SATOH, KAZUE;IWASA, MIKIO
分类号 H04R7/20;H04R9/06;(IPC1-7):H04R9/06 主分类号 H04R7/20
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