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1. 发明授权

US5812345A Monostable active latch for a disk drive actuator 失效
标题翻译：用于磁盘驱动器执行器的单稳态主动闩锁
公开(公告)号：US5812345A
公开(公告)日：1998-09-22
申请号：US474939
申请日：1995-06-07
申请人： Aaron S. MacPherson , Gordon A. Harwood , James W. Boeckner, Jr. , Jonathan D. Jargon
发明人： Aaron S. MacPherson , Gordon A. Harwood , James W. Boeckner, Jr. , Jonathan D. Jargon
IPC分类号： G11B21/02 , G11B5/54 , G11B21/22
CPC分类号： G11B5/54
摘要： A monostable active latch apparatus is disclosed for use in a hard disk drive which has a housing, a rotating data storage disk and an actuator mounted in the housing. The actuator controllably positions a read/write head over a predetermined portion of the disk and includes a voice coil motor coil carried by a yoke portion of the actuator. The active latch uses a permanent magnet to bias an elongated rotatable latch arm into engagement with the actuator when the actuator is positioned in the landing zone. An electromagnet coil, positioned between the magnet and the magnetic return plates, when energized, counters this bias, permitting the latch arm to rotate, counterclockwise, out of engagement with the actuator. When the coil is deenergized, the permanent magnet provides a clockwise torque on the arm, raising the latch end of the latch arm to a first position out of the path of the actuator. When the coil is energized, the latch end of the latch arm is driven to a second position beneath the rear end of the actuator. If the coil is deenergized while the actuator is positioned in the landing zone of the disk, the latch end of the latch arm catches and latches the actuator, preventing further rotation of the actuator until the coil is again energized and the actuator moved away from the landing zone.
摘要翻译：公开了一种用于硬盘驱动器的单稳态主动锁定装置，其具有外壳，旋转数据存储盘和安装在壳体中的致动器。执行器可控制地将读/写头定位在盘的预定部分上，并且包括由致动器的轭部支承的音圈电机线圈。当致动器定位在着陆区域中时，主动闩锁使用永磁体来将细长的可旋转锁臂偏置成与致动器接合。位于磁体和磁性返回板之间的电磁线圈通电时，反映了该偏压，允许锁定臂逆时针旋转，使其与致动器不接合。当线圈断电时，永磁体在臂上提供顺时针转矩，将闩锁臂的闩锁端提升到致动器路径外的第一位置。当线圈通电时，闩锁臂的闩锁端被驱动到致动器后端下方的第二位置。如果线圈在致动器位于盘的着陆区域时被断电，则闩锁臂的闩锁端卡住并锁定致动器，防止致动器的进一步旋转，直到线圈再次通电，并且致动器远离着陆区。

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