Spindle motor and recording medium assembly

Details Spindle motor and recording medium assembly Spindle motor and recording medium assembly

1994-01-07

1995-07-18

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 1702

Patent

active

054347300

ABSTRACT:
A spindle motor and recording medium assembly having a rotary shaft, and a rotary portion. The rotary portion includes a recording medium, a fixing member, a boss, and rotating motor elements including an annular magnet and a rotary yoke, wherein the boss secures the recording medium, wherein the rotary shaft and the boss are integrally joined together and the center of gravity of the rotary portion in a direction along the rotary shaft is positioned in a portion where the rotary shaft and the boss are connected to each other. In a preferred embodiment in which the recording medium is a hard disk, the hard disk is attached to the boss in such a position that a line running through the center of the thickness of the hard disk extends so as not to deviate from a portion where the rotary shaft and the boss are connected to each other.

REFERENCES:
patent: 5038240 (1991-08-01), Isomura

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