Patent ID: 6954338

Claim:
A disk drive unit, comprising: a disk driving source for rotating a disk-like medium for storing data; an actuator turning on a pivotal axis and on which a head is mounted for reading and writing data to the disk-like medium; a chassis accommodating the disk driving source and the actuator, wherein the actuator has a pair of receiving features protruding from the pivotal axis toward an outer circumference and located on a same circumference, and wherein a stopper secured to the chassis is provided between the pair of receiving features; a magnet embedded in the stopper for maintaining one of the receiving features in contact with the stopper; a coil provided in the actuator; a stator secured to the chassis and cooperating with the coil to comprise a voice coil motor, wherein the stopper is secured to the stator; and wherein when the actuator is in contact with each of the receiving features, the magnet is positioned closer to one of the receiving features than the other one of the receiving features, respectively.