Rotary information recording and reproduction apparatus

Details Rotary information recording and reproduction apparatus Rotary information recording and reproduction apparatus

1996-12-13

1997-10-14

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360106, G11B 3314, G11B 555

Patent

active

056778139

ABSTRACT:
An object of the present invention is to restrain the rigid body rotational vibration of a magnetic disc apparatus caused by the driving reaction force of a head in order to position the head quickly and precisely and to reduce the sizes of the magnetic disc apparatus. According to this invention, a dynamic damper having a natural frequency equal to the rigid body rotational frequency of the magnetic disc apparatus is provided in at least one of the four corners inside or outside a housing of the magnetic disc apparatus. The dynamic damper comprises a weight member and bar-like members acting like springs, and has an angled shape so as to meet the form factor standard sizes for magnetic disc apparatuses.

REFERENCES:
patent: 4812932 (1989-03-01), Hishinuma et al.
patent: 5027242 (1991-06-01), Nishida et al.

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