Low profile disk drive apparatus incorporating a three-tiered housing
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United States of America Patent
Stats
-
Oct 31, 1995
Issued Date -
N/A
app pub date -
Dec 2, 1993
filing date -
Nov 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides a disk drive apparatus for use in computer systems where size and weight are of paramount concern. The disk drive apparatus includes a 2.5 inch disk that provides between 20-40 megabytes of storage within a footprint area of approximately 2.8 inches by approximately 4.0 inches. Further, the disk drive has a height of 0.630 inch or less. The height dimension is achieved, in part, by providing a low profile spin motor to rotate the disk. The low profile spin motor uses high energy magnets made of rare earth materials. The disk drive also employs a rotary actuator having a voice coil assembly of reduced height by using the housing as a flux return path for the magnetic fields produced by the voice coil motor. Also provided is a three-tiered housing that contains the disk which, when connected to a printed circuit board, produces the low profile disk drive apparatus.
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