Steering magnets to reduce magnetic leakage flux in a disk drive
AssigneeIomega Corporation
InventorsJohn C. Briggs, Allen T. Bracken
Life of this patent
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Abstract
A disk drive with steering magnets that reduce the magnetic flux leakage from the actuator magnets of a linear actuator is disclosed. The steering magnets reduce flux leakage in the area of the magnetic disk where magnetic information is read and record, thereby enabling disk drive size to be reduces. The steering magnets are arranged along the sides of the outer return path. Like poles of the steering magnets face inward toward like poles of the actuator magnets.
Claims7
A disk drive comprising a suspension including at least one read/write head and a linear actuator for positioning the read/write head, the actuator including a coil, a magnetic flux outer return path, at least one actuator magnet coupled to the outer return path for electromagnetically cooperating with said coil, and at least one steering magnet located proximate the at least one of the actuator magnets for diminishing the magnetic flux leakage from the actuator magnets in the area of the read/write head.
A method for diminishing magnetic leakage flux from an actuator in a disk drive, comprising the steps of:
- providing an actuator having at least one actuator magnet that produces a magnetic leakage flux in an area for reading and recording information on a disk by read/write heads;
- and
- providing at least one steering magnet having a pole that faces a like pole of the at least one actuator magnet, the steering magnet being located for diminishing said magnetic flux leakage from the at least one actuator magnet.
Dependencies are inferred from the claim text.