Patent ID: 7298592

Claim:
An actuator of a disk drive to move a read/write head, for recording and reproducing data, to a predetermined position on a disk, the actuator comprising: an actuator pivot installed on a base member of the disk drive; a swing arm rotatably coupled to the actuator pivot and having a suspension supporting the head and formed at a leading end portion of the swing arm; a coil support portion provided at a rear end portion of the swing arm; a VCM coil coupled to the coil support portion and having four sections having respective particular directions; and magnets arranged to face the VCM coil and having four poles respectively corresponding to the four sections of the VCM coil, wherein, when current is applied to the VCM coil, directions of the current in the four sections of the VCM coil are different from one another, and wherein, assuming that a lengthwise direction of the actuator is a direction X and a widthwise direction of the actuator is a direction Y, first and second sections of the four sections of the VCM coil are disposed, away from the actuator pivot, on opposite sides with respect to an X direction center line and inclined to be symmetrical with each other with respect to the X direction center line, and third and fourth sections of the VCM coil are disposed, close to the actuator pivot, on opposite sides with respect to the X direction center line and inclined to be symmetrical with each other with respect to the X direction center line.