Disc unit having a drive motor and a chucking assembly for holdi

Details Disc unit having a drive motor and a chucking assembly for holdi Disc unit having a drive motor and a chucking assembly for holdi

1994-01-21

1995-10-24

Pascal, Robert J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, 360 9905, 360 9904, 369270, 369271, G11B 1703, G11B 1920, G11B 3312

Patent

active

054615232

ABSTRACT:
A disc unit includes a control circuit board engaged with a base body of the disc unit, and a shield cover for noise shielding. The shield cover is also used for preventing the separation of mounting tabs extending from the circuit board and the base body by pressing them to hold the circuit board on the base body. Furthermore the shield cover is used as reinforcement for preventing the base body from distorting. With such a structure, the control circuit board is held on the base body by pressure of the shield cover so that multiple fixing members such as screws for fixing the control circuit board can be omitted. Further, since the base body is reinforced by the shield cover, the prevention of distortion of the base body is performed without increasing the thickness of the unit. The disc unit also includes a direct drive motor having a rotor yoke which receives the disc, which rotates a spindle shaft that engages the central opening of the disc. The rotor yoke is integrally provided with a chucking mechanism for the disc.

REFERENCES:
patent: 3891716 (1975-06-01), Takahara et al.
patent: 4445155 (1984-04-01), Takahashi et al.
patent: 4581667 (1986-04-01), Gerfast
patent: 4654725 (1987-03-01), Wakaizumi
patent: 4654733 (1987-03-01), Kawakami et al.
patent: 4688125 (1987-08-01), Nomoto et al.
patent: 4788464 (1988-11-01), Nishikawa et al.
patent: 4805054 (1989-02-01), Kamoto et al.
patent: 4874976 (1989-10-01), Ohsawa et al.
patent: 4899244 (1990-02-01), Morse
patent: 4989107 (1991-01-01), Tsukahara
patent: 5128818 (1992-07-01), Koizumi et al.
Translation of Japanese Kokai Patent Publication No. 63-281267.

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