Chucking mechanism for floppy disk drive

Details Chucking mechanism for floppy disk drive Chucking mechanism for floppy disk drive

1988-06-13

1990-01-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, G11B 5016

Patent

active

048962325

ABSTRACT:
A disk rotatably driving device which has a disk of a magnetic material and a turntable formed with an element base on the upper surface of the disk, fixed to a rotatably driving shaft, a pole section formed on the element base for magnetically attracting the hub of a magnetic material formed at the center of the disk, a driving pin fixed to one end of a leaf spring fixed to the lower surface of the turntable, projected from the through hole of the turntable to rotatably drive the hub, and a nonmagnetic pole formed at a predetermined position of the element base at an axially symmetrical position with respect to the through hole thereof. Thus, the magnetic balance is improved to prevent a chucking mistake from occurring in a simple structure by providing the nonmagnetic pole of substantially the same shape as the through hole for the driving pin at the element base at an axially symmetrical position with respect to the through hole.

REFERENCES:
patent: 4658311 (1987-04-01), Sakaguchi

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