发明名称 |
Loudspeaker, video device, and portable information processing apparatus |
摘要 |
A loudspeaker includes a diaphragm that vibrates back and forth to emit a sound, a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap on a diaphragm side, and a voice coil that is directly or indirectly joined to the diaphragm and disposed within the magnetic gap. A magnetic fluid is loaded within the magnetic gap. Also, a plurality of first edge pieces are provided at different positions in an outer circumferential portion of the diaphragm for vibratably supporting the diaphragm, each of the first edge pieces having a non-linear cross-sectional shape.
|
申请公布号 |
US8542861(B2) |
申请公布日期 |
2013.09.24 |
申请号 |
US20080523201 |
申请日期 |
2008.10.28 |
申请人 |
SAIKI SHUJI;TAKEWA HIROYUKI;PANASONIC CORPORATION |
发明人 |
SAIKI SHUJI;TAKEWA HIROYUKI |
分类号 |
H04R11/02 |
主分类号 |
H04R11/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|