Disc detaining device for disc drives

Details Disc detaining device for disc drives Disc detaining device for disc drives

1995-03-02

1996-12-17

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

360 9912, G11B 17028

Patent

active

055861067

ABSTRACT:
A detaining device for use in a disc drive for loading/unloading and detaining a disc, especially an optical CD-ROM disc, in the read/write position; it comprises: (a) a turn table for supporting the disc; (b) a slidable detainer having a recessed portion; and (c) a guiding plate having a guiding slot near the middle thereof, the slot being dimensioned for allowing the detainer to move back-and-forth in the direction of the loading/unloading of the disc. The turn table is slidably movable between the opened position and the read/write position during the loading/unloading of the disc, and has a conically-surfaced center jut which is projected from the center of the jut for receiving the disc via a central hole provided in the disc. The recessed portion is provided with a recessed surface matching the conically-surfaced center jut of the turn table so as to cooperatively and firmly detain the disc when the disc is in the read/write position. The guiding slot has a leveled portion and an upwardly-curved portion; the leveled portion is equally distanced from the turn table so as to allow the detainer to be engaged with the center jut of the turn table when the turn table is pushed into the read/write position during a loading operation of the disc, and the upwardly-curved portion provides increased distance between the slot and turn table away from the read/write position, so as to cause the detainer to be separated from the center jut of the turn table when the turn table is moved away from the read/write position during an unloading operation. A pair of magnetic members are provided in the center jut and the recessed portion so as to cause them to be in a locked position when the detainer and the turn table are simultaneously pushed into the read/write position.

REFERENCES:
patent: 4680748 (1987-07-01), Kobayashi
patent: 4797873 (1989-01-01), Nobutani
patent: 4829501 (1989-05-01), Seto et al.
patent: 5172361 (1992-12-01), Urushibata et al.

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