Disk device and manufacturing method therefor

A disk device comprising:

• a case having a bottom wall;
• a disk-shaped recording medium located in the case;
• a drive motor which is located in the case and supports and rotates the recording medium;
• a head which performs information processing for the recording medium;
• a head actuator which is provided on the bottom wall in the case, supports the head for movement with respect to the recording medium, and is movable between a predetermined retracted position in which the head is situated on the outer peripheral side of the recording medium and an information processing position in which the head is situated over the recording medium;
• and
• an inertial latch mechanism which latches and holds the head actuator in the retracted position when the actuator moving to the retracted position is subjected to an external force, the inertial latch mechanism being modularized and including:
• a base plate;
• a first pivot and a second pivot set up on the base plate;
• a latch arm supported for rocking motion around the first pivot between a latch position in which the latch arm latches the head actuator in the retracted position and a release position in which the latch arm leaves the head actuator so that the head actuator is unlatched;
• an inertial arm which is rockably supported on the second pivot, rocks around the second pivot when subjected to an external force and causes the latch arm to rock from the release position to the latch position, and a stopper portion which prevents the latch arm and the inertial arm from slipping off the first and second pivots.