Patent ID: 6043957
Filing Date: 2000-03-28
Classification: G11B

Abstract:
A head positioning mechanism for a magnetic disk device, said head positioning mechanism being for positioning a magnetic head on a magnetic disk set to said magnetic disk device and comprising:a carriage movably mounted to said magnetic disk device;a supporting spring attached to said carriage and rotatable around a predetermined axis extending in a predetermined direction, said supporting spring holding said magnetic head to perform a seeking operation of said magnetic head in cooperation with said carriage; anda micro tracking actuator between said carriage and said supporting spring for making said supporting spring be rotated relative to said carriage to adjust a position of said magnetic head,said micro tracking actuator comprising:coil means held to one of said carriage and said supporting spring for generating magnetic flux in response to a flow of electric current therein; andmagnet means held to another of said carriage and said supporting spring to face said coil means in said predetermined direction, said magnet means traversing said magnetic flux and having a plurality of independent segments lying in the same plane, wherein at least one of said independent segments varies in size substantially along its entirety in a direction of relative movement between said coil means and said magnet means.