Magnetic disk unit having reduced profile and/or faster seek spe

Details Magnetic disk unit having reduced profile and/or faster seek spe Magnetic disk unit having reduced profile and/or faster seek spe

1992-03-05

1994-05-24

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

053154665

ABSTRACT:
The present invention provides a disc storage unit that utilizes a voice coil motor to move an access arm. The voice coil motor includes a coil disposed on the side of the access arm parallel with the case bodies of the disc storage unit, a pair of upper and lower yokes, with the coil located therebetween, mounted in parallel to the case bodies, and magnets disposed on at least one of the upper and lower yokes with a cross flux to the coil. At least one of the upper or lower yokes extends through a through-hole provided in at least one of the case bodies. The space gained by the through-hole can be used to reduce the profile of the disc storage unit or permit larger magnets, yokes, etc. to be used in the voice coil motor. The larger magnets, yokes, etc., improve the output of the voice coil motor and speed up the seek time of the disc storage unit. Therefore, the advantages of a low-profile and a high speed seek time can be obtained, respectively.

REFERENCES:
patent: 5193037 (1993-03-01), Pace
patent: 5195002 (1993-03-01), Sakurai

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