Optical disc clamp mechanism and adapter for use in an optical d

Details Optical disc clamp mechanism and adapter for use in an optical d Optical disc clamp mechanism and adapter for use in an optical d

1993-11-10

1996-12-17

Wolff, John H.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369271, G11B 17028

Patent

active

055861059

ABSTRACT:
In a clamp mechanism, an adapter, and an optical disc apparatus for compatibly playing back the MD and CD having different centering hole diameters and reference heights, a first clamp mechanism has a taper cone section for both an MD and a CD, while a second clamp mechanism has an MD turntable and a CD clamper which is driven in contact with the MD turntable while clamping the CD. The adapter is a disc which has a hole having the same inner diameter as that of the centering hole of the MD and a thickness of 0.8 mm, the adapter to be attached to the CD. A first optical disc apparatus has an MD spindle motor and a CD spindle motor, and an optical system including an objective lens is arranged on a straight line that connects both the spindle motors. A second optical disc apparatus has a spindle motor having an MD turntable and a CD turntable at both its ends.

REFERENCES:
patent: 4510592 (1985-04-01), Kanamaru et al.
patent: 4541086 (1985-09-01), Tanaka
patent: 4786997 (1988-11-01), Funabashi et al.
patent: 4958839 (1990-09-01), Guzik et al.
patent: 5303098 (1994-04-01), Yamamori et al.
patent: 5323379 (1994-06-01), Kim

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