Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Patent
1988-02-25
1989-12-19
Stephan, Steven L.
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
360133, 206309, 206312, G11B 2303
Patent
active
048887617
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a disk cartridge in which a disk such as a WRITE ONCE optical disk or the like is accommodated to be freey rotatable.
BACKGROUND ART
A known disk such as a WRITE ONCE optical disk is accommodated in a predetermined cartridge in order to protect an information signal from write error and read error caused by smudges due to dust upon non-use when it is not loaded onto a recording and/or reproducing apparatus or due to damage caused when it contacts with a foreign object. This kind of cartridge is disclosed in Japanese Published Patent Gazette No. 61-3015, in which opening portions are formed through upper and lower halves of the disk cartridge in order to expose one portion of a signal recorded portion of the disk accommodated in the disk cartridge and a chucking portion provided at the center of the rotation thereof. Also, in order to prevent at least the signal recorded portion of the disc from contacting with the inner wall of the disk cartridge, disk supporting ribs are protrusively formed within the cartridge. These ribs support the disk at its portion where no signal is recorded.
Of the thus arranged conventional disk cartridges, particularly the disk cartridge where the disk is supported by the integrally formed ribs, the cartridge nevertheless cannot protect the disk from being physically shocked. Thus, if the disk cartridge is subjected to physical shock during its transportation or the like, the disk will be damaged. If a flexible shock absorbing member such as a rubber plate is provided on the inner surface of the cartridge and this shock absorbing member supports the disk, the disk can be protected from the damage caused by the shock. When the weight of the disk is applied to the shock absorbing member, however, the shock absorbing member is bent so that the disk sticks to the shock adsorbing member. Thus, when the disk cartridge is loaded on and rotated by the recording and/or reproducing apparatus, there is then a risk that the disk cannot begin to rotate smoothly. Particularly when the shock absorbing member is made of silicone rubber with sufficient flexibility in order to enhance the shock absorbing effect, the disk sticks to the shock absorbing member noticeably.
DISCLOSURE OF INVENTION
The present invention is to provide a disk cartridge which can prevent a disk from sticking to a disk supporting member even when the disk supporting member is made of material such as silicone rubber or the like with sufficient flexibility and high shock absorbing effect in order to support the disk within the disk cartridge. Also, when the disk cartridge is loaded on and rotated by a recording and/or reproducing apparatus, the disk can begin to rotate smoothly and the disk supporting member can be fixed positively and stably.
According to an example of the present invention, there is provided a disk cartridge in which a disk 5 on which an information signal is recorded is rotatably accommodated within a cartridge 4. Disk supporting members 25, 26 or 35, 36 have a sticking preventing portion 27 or 37 formed on their disk supporting surface sides and are fixed to the inner wall of the cartridge 4 at its portions corresponding to non-signal recorded portions of the inner and outer peripheral portions of the disk 5 by bonding or calking. The disk 5 is supported by the disk supporting members 25, 26 or 35, 36.
According to the present invention, since the disk 5 is supported by the disk supporting members 25, 26 or 35, 36 having the sticking preventing portion 27 or 37 formed on their disk supporting side, the disk 5 can be effectively protected from the damage caused by the shock. Also, even if the disk supporting members 25, 26 or 35, 36 are bent by the weight of the disk 5, the sticking preventing portion 27 or 37 can prevent the disk from sticking to the disk supporting members. Further, the disk supporting members 25, 26 or 35, 36 can be bonded to the inner wall of the cartridge 4 without shedding extra adhesive agent or they are stably fixed thereto
REFERENCES:
patent: 3609722 (1971-09-01), Zenzefilis
patent: 4433410 (1984-02-01), Siryj et al.
patent: 4620247 (1986-10-01), Papciak et al.
patent: 4646193 (1987-02-01), Gitzendanner
patent: 4660118 (1987-04-01), Faber
patent: 4661875 (1987-07-01), Kinjo
patent: 4680662 (1987-07-01), Fukushira et al.
Shaw, Jr. Philip M.
Sony Corporation
Stephan Steven L.
LandOfFree
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