Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1993-07-22
1995-05-09
Levy, Stuart S.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369191, 369192, G11B 1722, G11B 1708, G11B 3302
Patent
active
054146798
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a disc player having at least one disc storage magazine in which a plurality of superposed disc holders each holding one disc are stored in storage compartments, the disc player further including a transporting device which is movable in the stacking direction of the disc storage magazine to move a desired disc back and forth together with the associated disc holder between the storage compartment and a playback unit. The transporting device is provided with a disc holder extraction device which is horizontally displaceable on the transporting device, a disc hold-down member for holding the disc to be played against the turntable of the playback unit and a carrying arm for accommodating a disc holder.
Such a disc player is known from DE 3,922,721.A1. Here the carrying arm of the transporting device is configured in the shape of a U in order to accommodate a disc holder with a disc deposited therein. The extraction device of the transporting device transports the disc holder holding the selected disc on appropriately arranged carrying rails on the upper face of the carrying arm. In the final position of the disc holder on the carrying arm, in which the disc is concentric with the turntable of the playback unit, the disc holder as well as the disc are not protected, on the one hand, against soiling and, on the other hand, against improper access. If no disc is being played, the carrying arm of the transporting device stands empty in its starting position above the playback unit. In that case, because of the U-shaped and thus open configuration of the carrying arm, the playback unit and particularly its playback head are subjected to soiling and to the danger of improper treatment.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a disc player of the above-mentioned type which, with a simple and compact structure, ensures a reliable shield for the disc holder and the desired disc against extraneous influences during transport to and from the playback unit and for the playback unit itself.
This is accomplished by the invention in that the upper face of the movable carrying arm is provided with a covering that completely covers the disc holder and the disc therein.
The measure according to the invention always protects the disc and the disc holder against soiling by dust and the like on its transporting path. At the same time, the covering prevents access to the disc or the disc holder, thus preventing possible damage to the transporting unit. If no disc is being played, the transporting device and the carrying arm are in their starting position directly above the playback unit. In this position the covering of the carrying arm shields the playback unit completely against soiling and improper access, which is of particular significance for the playback head of the playback unit.
To be able to detect, on the one hand, the imprinted identifying data of the selected disc during its transport and, on the other hand, observe its rotary movement during playing of the disc, an advantageous feature of the invention provides for the covering of the carrying arm to be configured as a transparent pane in the region of the disc.
According to an advantageous modification of the subject matter of the invention, the underside of the carrying arm is provided with two parallel holding rails for the disc holder. These rails are spaced at a distance that is slightly less than the width of the disc holder. In this way, the underside of the carrying arm together with the disc holder it carries and the disc disposed therein practically form a plane surface which makes it possible to employ playback units from different manufacturers and thus of different exterior design in the disc player. Since there are no projections or the like at the underside of the carrying arm, they cannot interfere with the downward movement of the carrying arm by bumping against the housing of the playback unit when the disc is placed onto the turntable of the playback unit.
To a
REFERENCES:
patent: 4685095 (1987-08-01), Rudy et al.
patent: 5197057 (1993-03-01), Iyama et al.
Korzuch William R.
Levy Stuart S.
NSM Aktiengesellschaft
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