JPS60261084A - Disc having information recording part for retrieval - Google Patents

Abstract

PURPOSE:To extract easily and quickly a desired disc by providing a retrieval information recording section to the edge side face of a disc to record large capacity of retrieval information. CONSTITUTION:A tape form retrieval information recording section 3 is provided to the edge side face 2 of a disc 1. As the method providing the said recording section 3, a magnetic tape having retrieval information is provided to the edge side face 2 and it is retrieved by approaching an electromagnetic coil at retrieval. Further, when many discs 1 are stored in a cartridge 4, the cartridge 4 is provided with a retrieval window 5. A retrieval device 6 is moved vertically at retrieval to read the retrieval information through a window 5. Thus, large capacity retrieval information is written and a desired disc is extracted easily and quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a disc having a search information recording section on the side surface of the end of the disc.

[Prior art]

Recently, optical discs have become popular as devices that can store large amounts of information.
Technologies such as magneto-optical disks are developing.

However, unlike microfilm and the like, it is difficult to visually recognize the contents of optical disks and magneto-optical disks. Therefore, up until now, we have provided a writing section on the cartridge.
An index of the information content was recorded, or a similar writing section was provided on the inner circumference of an optical disk or magneto-optical disk, but in these cases, the information content could not be recorded in detail. . In other words, it has the disadvantage that the index is rough compared to the information capacity of the disk.

Furthermore, indexing the inner circumferential portion of a cartridge or disk using a POS or the like would result in a more complicated index.

It is possible to record the contents in detail by providing an address section on the disk itself and recording the index contents in that section, but in this case, however, the disk must be installed in the device to make a judgment. It is not something that makes its own choices.

[eyes]

SUMMARY OF THE INVENTION An object of the present invention is to provide a disc that can record a large amount of search information and that can quickly and precisely read the contents of the search information in order to eliminate the above-mentioned drawbacks.

〔composition〕

In order to achieve the above object, the present invention is a disc capable of recording information on the disc surface, and is characterized in that a search information recording section is provided on the side surface of the end of the disc.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a perspective view of a disk (hereinafter referred to as disk) having a search information recording section according to an embodiment of the present invention.

Such disks include optical disks and magneto-optical disks. The disk 1 is for recording an image signal, for example, a binary signal on the disk surface.

That is, in the case of an optical disk, a binary signal is generated by providing concave and convex portions of about 1 μm and changes in light reflection. In the case of magneto-optical disks, the difference in polarization, which is a change in the reflection of light, is used as a binary signal. All of these signals can be stored on a disk as a large amount of information because they are signals of a minute area. In this way, image information and data information are recorded on the disc surface of the disc 1 using binary signals. In this embodiment, a tape-shaped retrieval information recording section 3 is provided on the end side surface 2 of the disk 1. This search information is information such as an index of the disc 1.

Methods for providing the search information recording section 3 include a magnetic recording method, a method using an optical disk material, a method using a magneto-optical disk material, and the like. In the magnetic recording method, a magnetic tape containing search information is provided on the side surface 2 of the end of the disk 1, and when searching, an electromagnetic coil is brought close and controlled to record.
During playback, the magnetic direction is detected and searched.

In addition, in both methods using the original disk material and magneto-optical disk material, tape-like material is applied to the end side surface 2 of the disk 1, and search information is recorded using a laser beam or the like. It searches by reproducing signals using reflected light.

FIG. 2 is a perspective view of a device for searching for a large number of disks. As shown in the figure, a large number of discs 1 are housed in a cartridge 4, and a search window 5 is provided in the cartridge 4. During a search, a large number of disks 1 are rotated at once in a specific direction, and the searcher 6 repeats the movement and stop operation along the searcher slide shaft 7, and when stopped, the rotating disks 1 are viewed through the search window 5. Read the search information recording section 3. When the search is completed, the rotary shaft 8 that rotates the first group of disks is fixed to the rotary motor 9, and the rotary shaft 8, which is fixed to the rotary motor 9, descends sufficiently together with the rotary motor 9, and the disk 1 specified by the search information recording section 3 is moved to this position. Ejected from the device.

〔effect〕

As described above in detail and concretely, according to the present invention, by providing search information on the side surface of the disc, it is possible to write a large amount of search information.

Furthermore, even if there are a large number of discs, a desired disc can be quickly and easily taken out.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a search disk according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of an apparatus for searching a large number of disks housed in a cartridge. In the figure, 1...disc, 2...end side surface, 3...search information recording section. It is. Figure 1 Figure 2

Claims (1)

[Claims] (1) A disc having a retrieval information recording section, which is characterized in that a retrieval information recording section is provided on an end side surface of the disc, in which information can be recorded on the disc surface.