JPS61104344A - Recording body - Google Patents

Abstract

PURPOSE:To obtain a recording body having large recording capacity by constituting the recording body of an optical recording medium which executes optical recording and a magnetic recording medium which executes magnetic recording. CONSTITUTION:A recording film 3 which is an optical recording medium is within the space formed of a substrate 2, a glass plate 5, a rib 7a and a spacer 4 and is formed in tight contact with the bottom surface of the substrate 2. A magnetic sheet 6 which is the magnetic recording medium is formed to a sheet shape of the two-layer constitution consisting of a base film 6a and a magnetic layer 6b. The nonmagnetic layer 6c side of the base film 6a is adhered to the plate 5. The sheet 6 is of a disk shape and is formed with a spindle hole 6d of a metallic fitting 7 in the central part. The outside circumferential part 6e thereof is positioned on the side outer than the inside circumferential part 3a of the recording film 3 so that the film 3 and the sheet 6 are disposed to permit an overlap part when viewed from the axial direction.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disk-shaped recording medium comprising an optical recording medium for optical recording and an air recording medium for magnetic recording. .

[Conventional technology]

As a conventionally known disk-shaped recording medium, there is an optical disk cartridge as shown in FIGS. 9(a) and 9(b), for example. Figure 9(a) is a plan view, Figure 9(b)
) is a front view. This optical disk cartridge is the 9th
Referring to FIGS. (a) and (b), a case 91 is made of synthetic resin and is composed of an upper case 92 and a lower case 93. A drive shaft insertion port 94 is provided at a predetermined position in the upper and lower cases 92 and 93. Head access hole 95. A reference bottle insertion hole 96 is formed. An optical disk 97 having a recording film, which is an optical recording medium, formed on the inner surface of a substrate is rotatably accommodated in the case 91 and arranged so that the center of the optical disk 97 coincides with the center of the drive shaft insertion opening 94. ing. Shutters 98 are slidably attached to the upper and lower cases 92 and 93, respectively, and close the head access hole 95 and drive shaft insertion port 94 when the disk cartridge is not in use, preventing dust from entering the case 91. It is intended as such.

Disk cartridges of this type are commonly used not only for optical disks but also for magnetic disks, but there are problems especially when used for optical disks. This is due to the characteristics of optical recording media, which have a large recording capacity and can record at an order of magnitude higher density than air-impermeable recording media, but have the disadvantage that rewriting and re-recording are almost impossible. be. Although rewritable optical recording media have been announced, they have not been fully put into practical use due to problems such as bit error rate and 8N ratio. Therefore, regardless of whether it is optical recording or magnetic recording, when recording, it is common to attach keywords to the recorded contents for later retrieval. However, since the optical recording media commonly used today cannot be rewritten in the same location, it is very inconvenient to write the search keyword, which is information to be changed, on the optical recording medium. For these reasons, in the case of optical recording,
One floppy disk was set for each optical recording medium, and the keyword was recorded as floppy disk. This takes advantage of the characteristics of an air recording medium, which has a pressure opposite to that of an optical recording medium and has a smaller recording capacity, but can be re-recorded. When configuring an optical recording device as a separate set, ■
One or more devices each for driving the optical recording medium and the floppy disk are required, resulting in high equipment costs.

■ It is necessary to manage the optical recording medium and the floppy disk at the same time, which is time-consuming and troublesome. Furthermore, if there is an oversight in management, there is a risk that searching may become impossible.

However, there was a need for improvements in optical recording.

[Problem that the invention seeks to solve]

The present invention has been made in view of the actual state of the prior art, and its purpose is to eliminate the need for a floppy disk for recording keywords, and to store a large amount of fixed information and replaceable information on a single disk. An object of the present invention is to provide a recording medium for a disk cartridge capable of recording variable information.

[Means for solving problems]

In order to achieve the above object, the present invention is characterized in that a recording medium is composed of both an optical recording medium for optical recording and an air-impermeable recording medium for magnetic recording.

〔Example〕

Hereinafter, the recording medium of the present invention will be explained based on the drawings.

FIGS. 1 to 8 are explanatory views showing essential parts of @1 to fourth embodiments of the present invention.

First, a first embodiment is shown in FIGS. 1 to 4. Figure 1(a)
+2. FIG. 1B is a cross-sectional view of a disk 1 as a recording medium rotatably housed in a case 91 of the disk cartridge shown in the conventional example, and FIG. 1B is a plan view thereof. 1st
In the figure, a disk 1 includes a transparent substrate 2, a recording film 3 for optical recording formed on the lower surface of the substrate 2, and a glass plate 5 for protecting the recording film 3 via a spacer 4.
A magnetic sheet 6 attached to the lower surface of the glass plate 5, and a π-interpolated magnetic sheet located at the center of the substrate 2, the recording film 3, the glass plate 5, and the magnetic sheet 6, and interpolated by π between the substrate 2 and the glass plate 5. It consists of a metal fitting 7 forming a chuck part. The substrate 2 and the glass plate 5 have a thin annular shape, and the disk 1 is formed by sandwiching the spacer 4 located on the outer periphery and the lip 7a of the metal fitting 7 located on the inner periphery. In this embodiment, the recording film 3, which is an optical recording medium, includes the substrate 2,
It is located in a space formed by the glass plate 5, the lip 7a, and the spacer 4, and is formed in close contact with the lower surface of the substrate 2. As shown in FIG. 8(b), which will be described later, the magnetic sheet 6, which is an air-blocking recording medium, is formed in a sheet shape with a two-layer structure of a base film 6a and a magnetic layer 6b, and the non-magnetic layer 6cltl of the base film 6a is It is attached to the glass plate 5. This magnetic sheet 6 is disc-shaped, and has a spindle hole 6d for a metal fitting 7 formed in its center, and an outer peripheral part 6e is located outside the inner peripheral part 3a of the recording film 3, when viewed from the axial direction. The recording film 3 and the magnetic sheet 6 are arranged to allow a duplicate portion.

When using the disk 1 of this embodiment, KItS reads information recorded on the recording film 3, which is an optical recording medium, directly above the head access hole 95 on the top side of the disk cartridge, as shown in FIG. In addition to disposing the optical pickup 8, a magnetic head 9 for reading and writing information recorded on the magnetic sheet 6 is disposed directly above the head access hole 95 on the lower side. The magnetic head 9 is accessed via the control section 10 to perform information processing.

The optical pickup 8 used here uses, for example, two semiconductor lasers as shown in FIG. 3, and its configuration will be briefly described below.

As shown in this figure, a laser beam emitted from a tracking half-body laser 11 is collimated by an optical system 12 such as a lens to become a parallel beam of light, and its optical path is bent by a half mirror 13.

After passing through the next half mirror 14, this light beam is condensed by an objective lens 15, and is focused as a light spot on the reference guide groove of the disk 10.

The light reflected by the disk 1 passes through the objective lens 15 again, its optical path is bent by a half mirror 14, passes through an optical system 16 such as a lens, and forms an image on the light receiving surface of a photodetector 17.

This photodetector 17 detects not only the presence or absence of data but also information regarding focusing and tracking. The detected tracking signal is fed back to the control system of the drive unit for moving the entire pickup relative to the disk IK, so that accurate tracking position pressure control is always performed.

On the other hand, the semiconductor laser 18 is used for recording and reproducing data, and the laser beam emitted from it is collimated by an optical system 19 such as a lens to become a parallel light beam, and the optical path is bent by a rotating mirror 20. , 14, and is focused as a light spot on the recording area of the disk 1 by the objective lens 15. At this time, an optical system is configured such that the light beam of the tracking semiconductor laser 11 and the optical axis roughly match, and therefore the recording/reproducing semiconductor laser 18
The light is reflected on the disk 1 and passes through the objective lens 15, half mirror 14, and optical system 16 to the photodetector 1.
The image is formed on the light receiving surface of 7. The position of the data track relative to the reference guide groove is controlled by the rotation of the rotating mirror 200.

On the other hand, the magnetic head 9 that reads the magnetic sheet 6 is a so-called floating head slider as shown in FIG. 4(a), and a coil is wound around the tip of the slider 21. A magnetic head core 22 is provided, and a magnetic head gap 23 is formed between the slider 21 and the main body.
Rewriting and reading are performed using this magnetic gap 23. In this magnetic head 9, since the disk 1 rotates at high speed, an air stream is generated on the surface of the disk 1 due to the viscosity of the air, and the slider 2 is caused by the action of this air stream.
1 floats away from the surface of the disk 1. Therefore, in this type of magnetic head 9, the magnetic sheet 6 which is a recording medium is
Recording and playback are possible without contact. At this time,
The gap between the slider 21 and the magnetic sheet 6 is adjusted by the action of a spring 240. In FIG. 4(b),
B indicates the direction of rotation of the disk l, and A indicates the direction of airflow.

In the first embodiment configured as described above, a recording film 3, which is an optical recording medium, is provided on one surface of one disk l, and a magnetic sheet 6, which is an insulating recording medium, is provided on the other surface. By arranging and accessing the recording film 3 with an optical pickup 8 and the magnetic sheet 6 with a magnetic head 9, reading from the optical recording medium and reading from the air recording medium are performed. This is so that it can be rewritten and read freely and without error. Therefore, if variable information such as search keywords for fixed information recorded on an optical recording medium are recorded on an air-blocking recording medium equipped with the same disk IK, only one drive device is required to drive the disk 1. However, since it is only necessary to provide a known magnetic head in addition to the optical pickup, the equipment cost is extremely low. In addition, since the necessary information and the information for retrieving the information can be recorded on a single disk 1, accounting becomes easier and there is no risk of horizontal failure due to management oversight.

Next, a second embodiment is shown in FIG. This embodiment is an example in which an optical recording medium and an air recording medium are provided on both sides of a disk. FIG. 5(a) is a sectional view of a disk according to the second embodiment, and FIG. 5(b) is a plan view thereof. below,
This will be explained based on the figure.

The disk 25 includes two substrates 26.27 and 26.27.
A metal fitting 7 having a lip 7a at the center of the substrate 27, an annular spacer 4 located at the outer periphery and maintaining the gap between the substrates 26 and 27 together with the rib 7a, and A recording film 28.29, which is an optical recording medium, is formed on the upper surface, and the recording film 28 is formed on the outside of the substrate 26.27.
．． 29) 30.
It consists of 31. The recording films 28, 29 are attached to the substrates 26, 27, . It is located in an annular space formed by the +7 tab 7a and the spacer 4, and is attached to the inner surfaces of the substrates 26 and 27, respectively, and is accessible from the surfaces of the substrates 26 and 27, that is, from both sides of the disk 10. The magnetic sheets 30 and 31 are substrate decoys.

27 and inside the recording films 26 and 27.

It is formed at a position that does not overlap the recording films 26 and 27 when viewed from the axial direction. 7b & spindle holes of fitting 7, 30a, 31a are magnetic sheets 30 and 3, respectively.
1 spindle hole. The configuration is the same as that of the first embodiment and the conventional example, including other cases not particularly described.

In this second embodiment, by providing an optical recording medium and an insulating recording medium on both sides of the disk 25, it has a recording capacity twice that of the optical recording medium of the first embodiment, and this optical Magnetic sheets 30 and 3 formed on the same substrates 26 and 27, respectively, for the recording medium, that is, the recording films 28 and 29
1, variable information such as keywords for searching is recorded. Therefore, this disk 1 access is
The optical pickup 8 and the magnetic head 9 shown in the figure may be of the same type, but unlike the one shown in FIG. 2, they may be arranged on the same side.

Further, a third embodiment is shown in FIG. This example is
Similar to the second embodiment, this is an example in which an optical recording medium and an air insulating recording medium are provided on both sides of the disk, except that magnetic sheets 30 and 31, which are magnetic media, are provided on the outer periphery of the disk 25. The only difference is that the second embodiment has the same structure as the second embodiment, except for parts that are not particularly explained.

In this example, a thin annular magnetic sheet (9).

31 is the outer peripheral part of the disk 25 and the substrates 26 and 27
The magnetic sheets 30 and 31 are attached to the upper and lower surfaces respectively for magnetic recording.
The inner circumferential edges of the recording films 28 and 29 are located outside the outer circumferential edges of the recording films 28 and 29 so that they do not overlap when viewed from the axial direction. Is the recording film damaged by the optical pickup 8 or magnetic head 9?

27 and magnetic sheet) 30 and 31, it is possible to scan the entire recording surface of n, as in the 1% second embodiment. Of course, the above-described embodiments 2 and 3 may be combined to provide an air-blocking recording medium on both sides of the disk 250 at the inner and outer circumferential portions of the disk, and to form a recording medium layer at the center of both surfaces.

This example is shown in FIG. 7 as a fourth embodiment. Figure 7 (a
) is a sectional view of the disk according to the fourth embodiment, and FIG.
) is its plan view. Figure 7(a).

In (b), the magnetic sheets 30, 31 are attached to the disk 2
5 and are connected to the upper and lower surfaces of the base plate 26 and the nail, respectively. At this time, the magnetic sheets 30 and 31 have a recording film, similar to the disk 25 shown in the second and third embodiments.

It is located so as not to overlap with 29. Other parts that are not particularly explained have the same configuration as the second and third embodiments.

The disk 1°25 used in these examples is
For example, as shown in FIG. 8(a), from above, there is a substrate 2, a recording film 3 for optical recording (an aluminum plate or a glass plate 5 for protecting the optical recording medium input recording film 3, and a glass plate 5). The recording section is constituted by a magnetic recording medium 32 formed on the lower surface.As shown in FIG. There is a so-called two-layer structure in which a magnetic layer 6b is formed on one surface of a film 6a and one magnetic sheet 6 is formed, and a magnetic layer 6b is formed directly on the lower surface of a glass plate 5, as shown in FIG. 8(C). There is a one-layer structure with a single-layer structure.Whether to use a two-layer structure or a single-layer structure is simply a matter of manufacturing, and can be freely selected based on usage and cost.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in which a recording medium is configured by including an optical recording medium for recording fixed information and an air recording medium for recording variable information on one disk, This has the advantage of being able to provide a recording medium with low equipment costs, easy and reliable searching, and a large recording capacity. In addition, information that you want to store temporarily can be recorded on an erasable and rewritable air recording medium, and information that you want to keep permanently can be stored on an optical recording medium. It also has the effect of providing a wide range of recording materials.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a disk as a recording medium of the first embodiment, in which FIG. 1(a) is a sectional view, FIG. 1(b) is a plan view, and FIG. 2 is a recording medium according to the present invention. FIG. 2 is an explanatory diagram showing a method of accessing a disk. FIG. 3 is an explanatory diagram of an optical pickup showing an example of picking up information from an optical recording medium that is a part of a recording medium.
The figure is an explanatory diagram of a magnetic radar slider for reading, writing, and rewriting Ta information from an air-impermeable recording medium, which is a part of the recording medium. and a perspective view showing a spring that presses it,
FIG. 4(b) is an explanatory diagram showing a state in which the recording medium is floating on the surface, FIG. 5 is an explanatory diagram of a disk as a recording medium of the second embodiment, and FIG. 5(a) is a cross-sectional diagram. Figure 5 (b
) is a plan view, FIG. 6 is an explanatory diagram of a disk as a recording medium of the third embodiment, FIG. 6 Ca) is a sectional view, and FIG.
b) is a plan view, FIG. 7 is an explanatory diagram of a disk as a recording medium of the fourth embodiment, FIG.
b) is a plan view, FIG. 8 is an explanatory diagram showing the relationship between the recording medium of the disk and the substrate, etc., and FIG. (b) is a sectional view of a sheet-like two-layer structure recording medium, FIG. 8(c) is a sectional view of a single-layer structure recording medium, and FIG. 9 is an explanatory diagram of a conventionally used optical disk cartridge. , Figure 9(a)
is a plan view, and FIG. 9(b) is a front view. 1...disk, 2...board, 3...
... Recording film (optical recording medium), 4 ... Spacer, 5 ... Glass plate, 6 ... Magnetic sheet, 6a ... Base film , 6b...
...Magnetic layer, 32...Inhibition recording medium, 91...
...Case, 95...4...Head access hole,
97...disc. Figure 1 tσ (b) Figure 4 tσ (b) Figure 5 (b) Evening Figure 6 (b) j5 Figure 7 (a) (b) Figure 8 (b) 6b (52) Figure 9(b)

Claims (1)

[Scope of Claims] 1. A disk-shaped recording medium comprising an optical recording medium for optical recording and a magnetic recording medium for magnetic recording. 2. A disk-shaped recording body according to claim 1, characterized in that the optical recording medium is provided on the inner surface of the disk substrate, and the magnetic recording medium is provided on the outer surface of the protective plate of the optical recording medium. body. 3. In the disk-shaped recording body according to claim 1, the optical recording medium is provided on the inner surface of the disk substrate, and the central portion of the disk substrate does not overlap with the optical recording medium provided with the magnetic recording medium on the inner surface. A recording medium characterized in that it is provided on the outer surface of. 4. In the disk-shaped recording body according to claim 1, an optical recording medium is provided on the inner surface of the disk substrate, and a magnetic recording medium is provided on the outer circumferential side of the disk substrate that does not overlap with the optical recording medium provided on the inner surface. A recording body characterized by having a recording material on its outer surface. 5. In the disk-shaped recording body according to claim 1, an optical recording medium is provided on the inner surface of the disk substrate, and a magnetic recording medium is provided on the outer circumferential side of the disk substrate that does not overlap with the optical recording medium provided on the inner surface. A recording body characterized in that it is provided on the outer surface and the outer surface on the inner peripheral side. 6. In the disk-shaped recording body according to any one of claims 1, 2, 3, 4, or 5, the magnetic recording medium provided on the disk is a base film and a base film. A recording medium comprising two magnetic layers and formed into a sheet shape. 7. In the disk-shaped recording body according to any one of claims 1, 2, 3, 4, or 5, the disc-shaped recording medium provided in the disk has a magnetic layer. 1. A recording medium comprising a single layer of , and formed directly on a disk substrate.