发明授权
- 专利标题: Laminated optical disc and turntable for the laminated optical disc
- 专利标题(中): 层压光盘的层叠光盘和转盘
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申请号: US09517074申请日: 2000-03-01
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公开(公告)号: US06212159B1公开(公告)日: 2001-04-03
- 发明人: Kazuo Mori , Kimihide Nakatsu , Kiyoshi Yanagiguchi , Tetsuro Nagami , Kenjiro Kime , Yoshinobu Ishida
- 申请人: Kazuo Mori , Kimihide Nakatsu , Kiyoshi Yanagiguchi , Tetsuro Nagami , Kenjiro Kime , Yoshinobu Ishida
- 优先权: JP8-132017 19960527
- 主分类号: G11B724
- IPC分类号: G11B724
摘要:
A turntable is a table mounted to a shaft (4) of a spindle motor and the turntable supports a laminated disc thereon and drives the disc in rotation. The laminated disc includes a lower disc and an upper disc stacked on the lower disc, and is supported on a disc-supporting surface. When the disc is loaded on the turntable, a fitting member fits into the center hole of the laminated disc for centering the laminated disc with respect to the shaft. The fitting member fits the center hole of the lower disc when the laminated disc is supported on said disc-supporting surface. The turntable may include a tapered member which guides the laminated disc to the disc-supporting surface. The laminated disc includes lower and upper discs each having an edge which defines the center hole. The corners of the edges are cut away along a circumference of the center hole. The upper and lower discs are placed together so that the cut-away corner directly face each other.
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