发明授权
US08798309B2 Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential direction
有权
具有填充有磁性流体的磁隙和在轴向和圆周方向上改变磁通密度的扬声器装置
- 专利标题： Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential direction
- 专利标题（中）： 具有填充有磁性流体的磁隙和在轴向和圆周方向上改变磁通密度的扬声器装置
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申请号： US13568755申请日： 2012-08-07
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公开(公告)号： US08798309B2公开(公告)日： 2014-08-05
- 发明人: Takahisa Tagami , Emiko Ikeda , Keisuke Nakashita
- 申请人： Takahisa Tagami , Emiko Ikeda , Keisuke Nakashita
- 申请人地址： JP Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2011-180875 20110822
- 主分类号： H04R1/00
- IPC分类号： H04R1/00 ; H04R9/06 ; H04R11/02
摘要：
A speaker includes a ring-shaped magnet, a yoke having a center pole portion inserted in the center of the magnet, and a ring-shaped plate and arranged on the outer circumferential surface of the center pole portion of the yoke and attached to the magnet. The speaker includes a cylindrically-shaped coil bobbin that is movable in the axial direction of the center pole portion and partially fitted on the center pole portion of the yoke. The speaker includes a voice coil wrapped around the outer circumferential surface of the coil bobbin, part of the voice coil being arranged in a magnetic gap, which is filled with a magnetic fluid, formed between the plate and the center pole portion of the yoke. The speaker includes a diaphragm having its inner circumferential portion connected to the coil bobbin, and that is vibrated as the coil bobbin moves.
公开/授权文献
- US20130051605A1 SPEAKER DEVICE 公开/授权日：2013-02-28
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