发明名称 |
Thin bias magnet unit for magneto-optical recording device |
摘要 |
A bias magnet unit has a permanent magnet that applies a bias magnetic field to an optical spot on a magneto-optical disk. A driving coil rotates the magnet in order to change a polarity of the bias magnetic field. A sensor detects the intensity and polarity of the bias magnetic field to confirm the rotational position of the magnet after it has been rotated. A linkage structure that is connected between a magnet holder of the magnet unit and the housing has arms that drive the magnet unit between two positions, one in which the magneto-optical disk cartridge can be inserted into the device and another in which the disk is loaded onto the spindle motor for recording/playback. Overall, the components of the device cooperate structurally to provide a relatively thin device structure having low power consumption.
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申请公布号 |
US5777952(A) |
申请公布日期 |
1998.07.07 |
申请号 |
US19960678267 |
申请日期 |
1996.07.11 |
申请人 |
HITAHI, LTD.;HITACHI COMPUTER PERIPHERALS CO., LTD. |
发明人 |
NISHIMURA, HAJIME;ICHIKAWA, ATSUSHI;YABE, AKIO;YOKOYAMA, YUJI |
分类号 |
G11B11/10;G11B11/105;(IPC1-7):G11B11/00 |
主分类号 |
G11B11/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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