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    • 1. 发明授权
    • Latch apparatus for latching an actuator arm assembly in a disk drive
    • 用于将致动器臂组件锁定在盘驱动器中的闩锁装置
    • US07203019B1
    • 2007-04-10
    • US11243815
    • 2005-10-05
    • Yanning LiuYanchu XuMichael McGrathDavid TungMark Heimbaugh
    • Yanning LiuYanchu XuMichael McGrathDavid TungMark Heimbaugh
    • G11B21/02G11B21/22G11B5/54G11B5/596
    • G11B21/22G11B5/54
    • A latch apparatus is configured to latch an actuator arm assembly that can position a read/write head relative to a data storage disk in a disk drive. The latch apparatus includes a latch arm, a coil, a permanent magnet, and a latch control circuit. The latch arm is configured to be moved between a closed position that inhibits movement of the actuator arm assembly in a landing zone and an open position that does not inhibit movement of the actuator arm assembly in the landing zone. The coil is configured to generate an electromagnetic force on the latch arm responsive to a coil current. The permanent magnet is configured to generate a magnetic force on the latch arm that is substantially opposed to the electromagnetic force from the coil. The latch control circuit is configured to increase according to defined open current profiles over a defined opening time period the coil current to at least an upper defined level to cause the coil to move the latch arm from the closed position to the open position. The latch control circuit is further configured to decrease according to defined close current profiles over a defined closing time period the coil current to no more than a lower defined level to cause the permanent magnet to move the latch arm from the open position to the closed position.
    • 闩锁装置被配置为闩锁致动器臂组件,该致动臂组件可相对于盘驱动器中的数据存储盘定位读/写头。 闩锁装置包括闩锁臂,线圈,永磁体和闩锁控制电路。 闩锁臂构造成在关闭位置之间移动,该关闭位置阻止致动器臂组件在着陆区域中的运动和不阻止致动器臂组件在着陆区域中的运动的打开位置。 线圈构造成响应于线圈电流而在闩锁臂上产生电磁力。 永磁体构造成在闩锁臂上产生与来自线圈的电磁力基本相反的磁力。 闩锁控制电路被配置为根据限定的开启时间周期将线圈电流增加到至少上限确定的电平,以使线圈将闩锁臂从关闭位置移动到打开位置。 闩锁控制电路还被配置为根据限定的闭合时间周期将线圈电流减小到不大于较低限定水平以使永磁体将闩锁臂从打开位置移动到闭合位置 。