Inventors: Mizuno, Osamu; Nakamura, Tohru; Aikoh, Hideki; Tomita, Hironori; Mohri, Masanari;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka-fu, JP)
Primary Examiner: Levy; Stuart S.
Assistant Examiner: Korzuch; William R.
Attorney, Agent or Firm: Wenderoth Lind & Ponack
In a clamp mechanism, an adapter, and an optical disc apparatus for compatibly playing back an MD and a CD having different centering hole diameters and reference heights, a first clamp mechanism has a taper cone section for both the MD and 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. |
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