Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1986-04-18
1988-10-04
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360133, G11B 5012
Patent
active
047759062
ABSTRACT:
A magnetic disk drive apparatus has a spindle holding mechanism for a spindle that supports a plurality of magnetic disks. The spindle is rotatably supported on a base by two bearings. Each bearing is pressed by a compressive coil spring to the base in the direction parallel with the plane of the magnetic disks and perpendicular to the axial direction of the spindle. Additionally, one of the bearings is affected with a pressing force in the axial direction of the spindle by another compressive coil spring. Therefore, even if the bearings have a thermal expansion coefficient different from that of the base, the thermal expansion can be absorbed by the compressive coil springs thereby preventing a generation of thermal stress between the parts. Consequently, deflection in relative position between the two bearings is prevented, and an inclination of the spindle is avoided.
REFERENCES:
patent: 1639684 (1927-08-01), Bott
patent: 2606947 (1952-08-01), Happe
patent: 3009748 (1961-11-01), Pitner
patent: 4672487 (1987-06-01), Brand et al.
Higashi Mikio
Nishida Hiroshi
Suzuki Masami
Takahashi Tsuyoshi
Hecker Stuart N.
Hitachi , Ltd.
Urcia Benjamin E.
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