Disc clamper and disc drive provided with the disc clamper

Details Disc clamper and disc drive provided with the disc clamper Disc clamper and disc drive provided with the disc clamper

1998-03-31

2000-12-12

Ometz, David L.

Dynamic information storage or retrieval

With particular cabinet structure

With mechanism to place disc on a turntable

369270, 360 9912, G11B 1702

Patent

active

061607800

ABSTRACT:
An improved disc clamper and a disc drive equipped with the disc clamper is disclosed. The disc clamper is used in a disc drive for carrying out playing back or playing back and recording of a disc which is rotated by means of a turntable movable between a raised position and a lowered position. The disc clamper is supported rotatably and movably in up and down direction by a support member with an opening provided above the turntable so as to hold the disc between the clamper and the turntable moved to the raised position. The disc clamper comprises a disc clamper main body including a cylindrical part, which has a substantially cylindrical shape and a diameter almost equal to the diameter of the turntable, to be inserted into the opening in the support member, and a flange part provided integrally with the upper circumference of the cylindrical part so as to be supported on the upper surface of the support member, an attraction means provided in the disc clamper main body to be attracted to the turntable, and a plurality of disc pressing protrusions projecting outward in the radial direction from the lower circumference of the cylindrical part of the disc clamper main body. This disc clamper is light and has a simple structure for easy assembling, and makes it possible to press the top surface of the disc with an effectively large area.

REFERENCES:
patent: 4654840 (1987-03-01), Takahashi
patent: 4689782 (1987-08-01), Tsuchiya et al.
patent: 4829510 (1989-05-01), Takahashi
patent: 4841518 (1989-06-01), Nozu et al.
patent: 5243481 (1993-09-01), Dunckley et al.
patent: 5583717 (1996-12-01), Nakata et al.
patent: 5610900 (1997-03-01), Yamashita et al.
patent: 5907533 (1999-05-01), Choi

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