Magnetic disk unit

Details Magnetic disk unit Magnetic disk unit

1994-02-23

2000-06-20

Ometz, David L.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

310 67R, G11B 1702, H02K 708

Patent

active

060784660

ABSTRACT:
A magnetic disk unit of the present invention has a construction in which: a rotor, on which a magnetic disk is loaded, is integrally formed with a sleeve portion of a ball bearing unit, or with a spindle of a spindle motor for driving the disk, or with an inner or an outer race of the ball bearing unit in a disk drive unit of the magnetic disk unit, so that: alignment operations of the rotor with the ball bearing unit are eliminated in assembling operations of the magnetic disk unit; and, the rotor is free from radial vibrations to improve the disk in recording density and reliability, whereby the number of parts of the magnetic disk unit and the number of assembling operation or steps of the magnetic disk unit are reduced, which leads to reduction of the manufacturing cost of the magnetic disk unit.

REFERENCES:
patent: 4118038 (1978-10-01), Watanabe
patent: 4900958 (1990-02-01), Kitahara et al.
patent: 5045738 (1991-09-01), Hishida et al.
patent: 5138209 (1992-08-01), Chuta et al.
patent: 5157295 (1992-10-01), Stefansky et al.
patent: 5177650 (1993-01-01), Jabbari et al.
patent: 5200866 (1993-04-01), Fruge et al.
patent: 5214326 (1993-05-01), Yonei
patent: 5334895 (1994-08-01), Morioka et al.
patent: 5352947 (1994-10-01), MacLeod
patent: 5391952 (1995-02-01), Simazu et al.

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