Actuator for magnetic disks and having a VCM support with a rece

Details Actuator for magnetic disks and having a VCM support with a rece Actuator for magnetic disks and having a VCM support with a rece

1994-08-03

1995-11-21

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

054693160

ABSTRACT:
In a magnetic disk apparatus, a head driving device has a permanent magnet assembly and an arm assembly. The permanent magnet assembly has a pair of permanent magnets whose different polarities face each other with the intermediary of a pair of support members. In the arm assembly, an arm carries a magnetic head on one end and a coil on the other end. A coil is inserted between the opposite polarities of the magnets, so that the arm assembly is rotated by the Lorentz force generated in the coil. The range over which the arm assembly is rotatable is determined by the support members against which the arm assembly selectively abut. At least one of the support members is formed with a recess or groove for receiving part of the arm assembly when the assembly is rotated. Hence, despite that the support member has a substantial thickness, the movable range of the arm assembly is the same as when the support member has a small thickness. Such a support member prevents the magnetic circuit from saturating and frees the head from the influence of flux leakage.

REFERENCES:
patent: 5233493 (1993-08-01), Eliason
patent: 5270887 (1993-12-01), Edwards
patent: 5343345 (1994-08-01), Gilovich

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