发明名称 |
SPEAKER DEVICE |
摘要 |
Acoustic conversion efficiency is improved and a stable signal reproduction operation is ensured. Provided is a speaker device including: a magnet a yoke attached to the magnet and, at least one sub-plate that is separated from the main plate in an axial direction of the central axis; a coil bobbin formed in a tubular shape and changeable in the axial direction; a voice coil wound around an outer circumferential surface of the coil bobbin, at least a portion of the voice coil being disposed in a main magnetic gap formed between the main plate and the yoke; a vibration plate having an inner circumferential portion connected to the coil bobbin; and a magnetic fluid filling at least one sub-magnetic gap formed between the sub-plate and the yoke, wherein a through-hole positioned in the sub-magnetic gap filled with the magnetic fluid is formed in the coil bobbin. |
申请公布号 |
US2016345102(A1) |
申请公布日期 |
2016.11.24 |
申请号 |
US201515106964 |
申请日期 |
2015.01.15 |
申请人 |
SONY CORPORATION |
发明人 |
TAGAMI Takahisa;IKEDA Emiko;KUNIKATA Naoya |
分类号 |
H04R9/02;H04R7/12;H04R9/06 |
主分类号 |
H04R9/02 |
代理机构 |
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代理人 |
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主权项 |
1. A speaker device comprising:
a magnet having a central axis; a yoke having a central axis, the central axis of the yoke being identical to the central axis of the magnet, the magnet being attached to the yoke; a main plate attached to the magnet; at least one sub-plate attached to the magnet and positioned to be separated from the main plate in an axial direction of the central axis; a coil bobbin formed in a tubular shape and changeable in the axial direction; a voice coil wound around an outer circumferential surface of the coil bobbin, at least a portion of the voice coil being disposed in a main magnetic gap formed between the main plate and the yoke; a vibration plate having an inner circumferential portion connected to the coil bobbin, and vibrating according to a change of the coil bobbin; and a magnetic fluid filling at least one sub-magnetic gap formed between the sub-plate and the yoke, wherein a through-hole positioned in the sub-magnetic gap filled with the magnetic fluid is formed in the coil bobbin. |
地址 |
Tokyo JP |