Disc-shaped recording medium with hub structure

Details Disc-shaped recording medium with hub structure Disc-shaped recording medium with hub structure

1995-07-25

1997-08-12

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Adjuncts or adapters

369282, G11B 726

Patent

active

056573111

ABSTRACT:
A disc-shaped recording medium is provided in which the coupling state between the disc substrate and the hub structure may be positively maintained even after repeated mounting and dismounting operations of the recording medium from a recording/reproducing apparatus for prohibiting the hub structure from being disengaged from the disc substrate. The disc-shaped recording medium includes a disc substrate 2 having an information recording section for recording information signals and a center aperture 5, a hub structure 3 and a clamping member 4. The hub structure has a magnetic plate 6 magnetically clamped to a disc table by a magnetic attracting means and an outer rim fitting member 9 slightly larger in diameter than the inner diameter of the center aperture 5 of the disc substrate 2 having plural elastically flexible engagement pieces 13 for being unified to the outer rim of the magnetic plate 6. The clamping member 4 is formed of a spring material so as to exhibit elasticity in the direction along its thickness and is of a diameter slightly larger than the inner diameter of the center aperture 5 of the disc substrate 2. The clamping member is integrally formed with mating engagement pieces 23 adapted for being engaged with the engagement pieces 13 of the outer rim fitting member 9.

REFERENCES:
patent: 4910624 (1990-03-01), Peeters
patent: 5289456 (1994-02-01), Takahashi
patent: 5315579 (1994-05-01), Hector et al.
patent: 5333080 (1994-07-01), Ridinger et al.

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