Disk drive

A disk drive comprising:

• a drive motor on a base configured to support and rotate a recording medium;
• a carriage supporting a head, configured to perform information processing with the recording medium, on the base to be pivotable around a central axis between a retracted position where the head is on an outer peripheral side of the recording medium and an information processing position where the head is on the recording medium;
• a first magnetic attraction portion on the carriage configured to attract the carriage toward the retracted position;
• an attaching stop on the base configured to attach to the carriage and to position the carriage in the retracted position when the carriage is moved to the retracted position;
• and
• a latch configured to latch and hold the carriage in the retracted position when the disk drive receives an external force while the carriage being in the retracted position,
• wherein the latch comprises an engaging portion on the carriage, a latching portion on the base is configured to pivot around an central axis in a latchable range where the latching portion is configured to latch the engaging portion of the carriage and a released position in which the latching portion is out of a movement path of the engaging portion in order to unlatch the engaging portion, and a second magnetic attraction portion on the latching portion is configured to attract the latching portion toward the released position,
• the engaging portion of the carriage is configured to move along a circular trajectory around a rotational axis of the carriage and the latch hook of the latching portion is configured to move along a circular trajectory around a rotational axis of the latching portion,
• the carriage is held in the retracted position by contacting the attaching stop in a non-operational state, and the latching portion is configured to pivot from a stationary position to the latch side before the engaging portion of the carriage reaches an intersection of the respective circular trajectories of the engaging portion and the latch hook when a rotational impact externally acts in a direction to pivot the carriage toward the information processing position with the latching portion contacting the carriage and in the latchable range inside the circular trajectory of the engaging portion.