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Invention Grant
US09462392B2 Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential directions 有权
具有充满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

Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential directions
Abstract:
A speaker device including a magnet formed in a ring shape; a yoke having a center pole portion inserted in the center of the magnet; a plate formed in a ring shape and arranged on an outer circumferential surface of the center pole portion of the yoke while being attached to the magnet; a coil bobbin formed in a cylindrical shape and movable in the axial direction of the center pole portion while being partially fitted on the center pole portion of the yoke; a voice coil wrapped around the outer circumferential surface of the coil bobbin, at least part of the voice coil being arranged in a magnetic gap formed between the plate and the center pole portion of the yoke; a diaphragm having its inner circumferential portion connected to the coil bobbin; and a magnetic fluid filled in the magnetic gap.
Abstract(Chinese):

一种扬声器装置，包括形成为环形的磁体; 具有插入在磁体中心的中心极部的磁轭; 形成为环状的板，并且安装在轭的中心极部的外周面上，同时安装在磁体上; 线圈架，其形成为圆筒状，并且在所述轭的中心极部上部分地配置在所述中心极部的轴向方向上移动; 缠绕在线圈架的外周面的音圈，音圈的至少一部分配置在形成于该磁轭与磁轭的中心极部之间的磁隙中; 隔膜，其内周部分连接到线圈架; 以及填充在磁隙中的磁性流体。

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