发明申请
US20090015961A1 DISK DRIVE INSTALLED IN PORTABLE ELECTRONIC DEVICE, AND METHOD OF UNLOADING A HEAD WHEN THE ELECTRONIC DEVICE FALLS
审中-公开
便携式电子设备中安装的磁盘驱动器，以及电子设备故障时卸载头的方法
- 专利标题： DISK DRIVE INSTALLED IN PORTABLE ELECTRONIC DEVICE, AND METHOD OF UNLOADING A HEAD WHEN THE ELECTRONIC DEVICE FALLS
- 专利标题（中）： 便携式电子设备中安装的磁盘驱动器，以及电子设备故障时卸载头的方法
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申请号： US12141338申请日： 2008-06-18
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公开(公告)号： US20090015961A1公开(公告)日： 2009-01-15
- 发明人: Tatsuharu Kusumoto
- 申请人： Tatsuharu Kusumoto
- 申请人地址： JP Tokyo
- 专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址： JP Tokyo
- 优先权： JP2007-183619 20070712
- 主分类号： G11B21/02
- IPC分类号： G11B21/02
摘要：
According to one embodiment, a disk drive (HDD) is installed in a portable electronic device. The HDD includes an actuator which supports a head such that the head is radially movable over a disk. A constant speed controller incorporated in the HDD executes constant speed control for unloading the head onto a ramp at a constant speed in accordance with a fall detection signal output from a fall detector and indicating that fall of the device has been detected. In the constant speed control, the controller drives a voice coil motor as a drive source for the actuator to make the movement speed of the head identical to a first target speed. The first target speed is set higher than a second target speed set when the head is unloaded onto the ramp in a normal state.
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