JPS6015880A - Recording medium - Google Patents

Abstract

PURPOSE:To prevent erasure of index information due to an optical beam for recording or the like and to prevent damage by recording index information separately with recording information of a recording medium to attain read of the index information at the same time with the loading to an information recording and reproducing device. CONSTITUTION:A package type memory 14 is built in a part of a case 2 and an external connecting section 15 connected electrically to input/output pins of the information recording and reproducing device is provided to a side face of the case 2. The index information is recorded to the memory 14. After the loading of the disc 1, when the user inputs an information retrieval code to the information recording and reproducing device or an input/output device or the like, the index information corresponding to the information retrieval code is read from the memory 14 and an optical head 12 is moved in advance in radial direction of the disc 1 near the desired information track position based on the address information. In erasing or writing the index information, after a switch 28 is thrown to the position of an erasure/write circuit 30, the erasure or write operation is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in recording media such as disks, cards, drums, or tapes on which information is recorded optically, thermally, or magnetically.

In recent years, optical recording media such as optical disks or magneto-optical disks have attracted attention as high-density information recording means.

An example of a conventional recording medium is shown in FIG. A disk 1, which is a disk-shaped recording medium, is housed in a case 2 made of resin or the like for preservation and safety. Figure 2 shows disk 1
An example of a conventional information recording and reproducing apparatus using a disc 1 is shown in which a cased disc 1 is inserted through an insertion slot 3 on the front side of the apparatus.

When inserted, the disk 1 is positioned by the center hole 5 of the bearing 4 and the spindle 7 of the drive motor 6 fitting together, and a rotating plate 8 coaxial with the spindle 7 and a rotating plate 8 provided on the main body of the device. It is frictionally driven by the freely movable pressure plate 9 and rotates as the rotating plate 80 rotates.

Then, a light beam 11 emitted from the semiconductor laser 10 passes through the optical head 12, the window 13 of the case 2, and is irradiated onto the disk 1, thereby performing recording or reproduction.

The case 2 is provided to prevent the disc 1 from getting dirty or to prevent the disc 1 from being damaged during rotation and scattering of fragments. On the ordinary disc 1, index information for managing a series of information, such as a search keyword address of recorded information and a classification 1 illustration number, is recorded in the recording area of the disc 1. When recording or reproducing desired information, a user or machine searches for a desired disc and attaches it to the information recording and reproducing apparatus. The information recording and reproducing device is
After mounting, wait until the number of rotations of the disk 10 reaches a predetermined value, irradiate the aforementioned light beam 11, read out the index information, and if necessary, after expanding and storing the index information in the internal RAM of the device, According to the 'If information, the optical head 12 is accessed to a desired track (hereinafter referred to as cueing), and information is recorded or reproduced. However, in the above operation, waiting time is required for the disk to rotate 10 times and playback of index information until the cue is completed, which reduces work efficiency when changing disks frequently. was.

Furthermore, there is a risk that the index information recording area may be irradiated with the recording light beam due to an accident or the like, and the index information may be erased.

An object of the present invention is to solve the above-mentioned problems, to make it possible to read out index information immediately upon installation into an information recording/reproducing device, and to prevent the index information from being erased or damaged by a recording light beam or the like. The objective is to provide a recording medium that can.

In order to achieve this object, the present invention includes a solid-state memory in which index information is recorded and an external connection part that electrically connects the solid-state memory to the outside. It is characterized by being recorded separately. In the present invention, solid-state memory refers to semiconductor memory, magnetic bubble memory, etc.
A memory that can write and read information without requiring mechanical drive.

The present invention will be explained in detail below based on the illustrated embodiments.

FIG. 3 shows an embodiment of the present invention. Components similar to those in FIG. 1 are designated by the same reference numerals. The disk 1 has a well-known optical recording material or magneto-optical recording material deposited on the surface of a glass substrate, and is housed in a case 2 made of polycarbonate with a thickness of 2 mm. The disk 1 is fixed to a bearing 4 whose portion is exposed from the case 2, and is rotatably supported by the case 2 together with the bearing 4. A packaged memory 14 is embedded in a part of the case 2, and an external connection portion 15 electrically connected to an input/output pin of an information recording/reproducing device is provided on a side surface of the case 2. The packaged memory 14 records index information.

4 and 5 show an information recording and reproducing apparatus using the cased disc 1 shown in FIG. 3. FIG. Components similar to those in FIG. 2 are designated by the same reference numerals.

FIG. 4 shows a state in which the disk 1 is being loaded, and FIG. 5 shows a state in which the disk 1 has been loaded.

The disk 1 is inserted into the rail 16 from the insertion slot 3 on the front of the main unit.
The case 2 is inserted together with the guide. A terminal plate 19 of the input/output pin 18 is fixed to the wall 17 on the back side of the device, and the mounting is completed when the case 2 abuts against the terminal plate 19.

In this state, the external connection section 15 of the packaged memory 14
In addition, the output bin 18 of the signal processing circuit installed in the main body of the device
is inserted, it becomes possible to read the index information of the packaged memory 14, and perform information retrieval and the optical head 1.
2 access becomes possible. After installation is completed, the front cover 21, which can be opened and closed around the rotational hinge 20, is closed. In the closed state, the front cover cam 22 attached to the front cover 21 pushes up the push-up cam 23,
The drive motor 6 supported by the support plate 24 is placed in the drive position. That is, the support plate 24 is configured to rotate around the hinge 25 as the front cover 21 is opened and closed, and when the front cover 21 is closed, the rotation plate is rotated by the center hole 5 of the bearing 4 and the drive motor 6. 8 and 7 are fitted. The bearing 4 is connected to the rotating plate 8 and the pressure plate 9.
The disk 1 is driven by friction 1, and the disk 1 rotates accordingly.

After loading the disc 1, when the user inputs a certain information retrieval code into an information recording/reproducing device or an input/output device (not shown), the index information corresponding to the information retrieval code is read from the packaged memory 14, and the The optical head 12 can be moved in advance in the radial direction of the disk 10 to near the desired information track position based on the address information.

FIG. 6 shows a signal processing circuit provided in the main body of the apparatus. The signal processing circuit includes an input/output interface 27 connected to the input/output pin 18 by a connection cord 26, a changeover switch 28, a readout circuit 29, an erase/write circuit 30, and a control circuit 31. During recording or reproduction, the readout circuit 29 is connected to the input/output interface 27 by the switch 28, and the index 1 report is read out from the packaged memory 14 in response to a readout command from the control circuit 31. When erasing or writing index information, after the switch 28 is switched to the erasing/writing circuit 30 side, the erasing or writing operation is performed.

According to this embodiment, the index information is read out immediately after the cased disc 1 is loaded into the information recording/reproducing apparatus, so that the access start time of the optical head 12 can be accelerated.

Furthermore, since the index information recorded in the packaged memory 14 is not affected by the light beam 11, accidents such as erasure or damage can be completely eliminated.

In this embodiment, the pancage type memory 14 corresponds to the solid-state memory of the present invention, and the optical head 12 corresponds to the recording/reproducing means.

For Disc 1, as the amount of information increases, the number of discs will increase, and it may be necessary to manage and search them.
As in this embodiment, if the index information is recorded in the packaged memory 14 integrated with the disk 1, it is possible to store a large number of disks by providing a connector that can be electrically connected to the packaged memory 14 on the disk management shelf. It becomes possible to read out the index information stored in the disk management shelf and search for a desired disk without providing a new search memory means.

The packaged memory 14 described above is E P
It OM, magnetic bubble memory, etc. are conceivable, but other non-volatile memories can also be used if a dedicated device that can write and erase data based on signals from the RAM inside the device is provided outside the information recording/reproducing device. It is possible and C
- It is also possible to use a MOS static RAM and a backup dry battery.

Furthermore, in this embodiment, the packaged memory 14 is embedded integrally within the case 2, but the packaged memory 14 may be removed from the case at the same time as installation, and when removed, it may be reinstalled into the case, or it may be directly inserted into the case. It is also possible to embed or incorporate it into the disc.

As explained above, according to the present invention, a solid-state memory in which index information is recorded and an external connection part that electrically connects the solid-state memory to the outside are provided. I decided to record it separately.

It is possible to read the index information quickly when it is attached to an information recording/reproducing device and to a circuit, and it is possible to prevent erasure or damage to the index information due to a recording light beam or the like.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional cased disc;
The figure is a sectional view showing a conventional information recording/reproducing device, FIG. 3 is a perspective view showing an embodiment of the present invention, and FIGS. 4 and 5 are information recording using a cased disk according to an embodiment of the present invention. FIG. 6 is a sectional view showing the reproducing apparatus, and a block diagram showing a signal processing circuit of the information recording and reproducing apparatus. 1...Disc, 2...Case, 4...Bearing, 1
0... Semiconductor laser, 11-... Light beam, 12...
- Optical head, 13... window, 14... packaged memory. 15... External connection section, 18... Input/output bin, 19.
...Terminal board, 28... Selector switch, 29... Readout circuit, 30... Erase/write circuit, 31... Control circuit. Patent applicant Canon Co., Ltd. Representative Minoru Nakamura 5 Figure 6 Country ↓ 457--

Claims (1)

[Claims] 1. In a recording medium on which information is recorded or reproduced while moving relative to the recording/reproducing means, a solid-state memory in which index information is recorded and an external connection that electrically connects the solid-state memory to the outside. A recording medium characterized by comprising: