JP2000163825A - Disk device and its recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To duplicate a large quantity of prescribed information in a short time and at a low cost by preparing a disk-like recording medium having a magnetic track and a reproducing exclusive track recording prescribed information by plural recessed parts, a reproducing head part, a magnetic head, a head positioning mechanism part and a controller. SOLUTION: When information in a reproducing exclusive track 6 is reproduced, reflected light is received into a PD by changing intensity depending on the existence of a pit 7 in the reproducing exclusive track 6. Reproduced signals are outputted to an R circuit with the PD based on light receiving intensity. When information is recorded, a relative positional deviation between the reproducing exclusive track 6 and a magnetic track 9 is detected at the time of loading a recording medium, an off-track quantity in the reproducing exclusive track 6 at the time of positioning the magnetic track 9 in on-track is recorded. Information is preliminarily recorded in the reproducing exclusive track 6 with the pit 7. Since the magnetic track capable of magnetically recording and reproducing is provided, individual information for users is added or changed and illegal copying is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device to which a recording medium can be attached and detached, and more particularly to a disk device using a recording medium having a non-rewritable recording area and a rewritable recording area.

[0002]

2. Description of the Related Art Conventionally, there is a flexible disk (hereinafter referred to as FD) as a recording medium on which digital data is recorded and which can be distributed in large quantities. FIG. 5 is an explanatory diagram showing a conventional 3.5-inch FD. In the figure, reference numeral 50 denotes a recording medium, which is provided by applying a magnetic recording material of iron oxide type to a flexible sheet such as a PET resin and punching out a circular sheet. In addition, the thing with a large recording capacity has a thing of a metal iron magnetic powder coating film. Reference numeral 51 denotes a magnetic recording area of the recording medium 50, on which a number of recording tracks are provided concentrically. Reference numeral 52 denotes a hub, which is arranged at the center of the recording medium 50 and is fixed to the recording medium 50. Reference numeral 53 denotes a center hole provided in the hub 52, and reference numeral 54 denotes a drive hole provided in the hub 52. 55 is a diskette for storing the recording medium 50, 56 is a window provided on the diskette 55, 57 is a shutter for opening and closing the window 56, 58 is an FD, and includes a structure denoted by reference numerals 50 to 57. This FD5
No. 8 has a track record of being used to distribute the same information in large quantities, such as program distribution. The FD 58 can rewrite, partially add, or delete information, and the user can additionally record individual information on the distributed FD 58.

The FD 58 used for mass distribution of the same information usually has a recording capacity of about 1.44 Mbytes, and has a small recording capacity, so that it is not very suitable for today's mass information distribution. ing. So 1
An FD having a recording capacity of 00 Mbytes or more has been put to practical use. However, the standardization of the FD of 100 Mbytes or more, such as the FD58 of 1.44 Mbytes, has not yet been completed, and it takes time to record information. Poor practicality. The FD 58 having a recording capacity of 1.44 Mbytes is provided with 80 recording tracks (0 to 79 recording tracks) in the recording area 51.
Or more. In the FD 58 having a recording capacity of 100 Mbytes or more, a servo track (not shown) is provided on the recording medium 50, and a magnetic head (not shown) is positioned based on the track position information of the servo track. Have been done. The track position information of the servo track includes a magnetically provided method and a mechanically provided method such as a depression.

On the other hand, there is a CD-ROM as a recording medium capable of mass distribution of the same information. FIG. 6 shows a conventional CD-
FIG. 3 is an explanatory diagram showing a ROM. That is, a hard plastic substrate 60 such as a polycarbonate material is formed in a disk shape, and digital data is formed on the substrate 60 along a spiral track by a method of forming pits 61 (presence, position, length) according to a predetermined modulation method. It is recorded. 62 is a reflective film, 63 is a protective film, and 64 is a CD-ROM, which includes components denoted by reference numerals 60 to 63. The pits 61 are provided on the substrate 60 by thermoforming or thermal stamping, and a large number of CD-ROMs having the same information can be manufactured at low cost. However, this CD-ROM
Has a recording capacity of several hundred Mbytes, and is suitable for recording a large amount of the same information, but cannot rewrite data.

Next, a disk device for recording information on the FD 58 or reproducing the recorded information will be described. FIG.
FIG. 11 is an explanatory diagram showing a conventional disk device. In the figure,
Reference numeral 70 denotes a magnetic head that records information on or reproduces information from the recording medium 50 (shown in FIG. 5), and 71 denotes an optical unit that detects track position information of a servo track, and is a laser diode (hereinafter, referred to as an LD). ) 72 and a photodetector (hereinafter, referred to as PD) 73.
Reference numeral 74 denotes a head positioning mechanism, on which the magnetic head 70 and the optical unit 71 are mounted, and which is provided so as to be movable in the radial direction of the recording medium 50. 75 is a read / write circuit connected to the magnetic head 70, 76 is a decoder for demodulating a reproduction signal from the read / write circuit 75, 77 is a first buffer memory for temporarily recording the output from the decoder 76, 78 Is an encoder that modulates a signal from an external device, 79 is a second buffer memory that temporarily records a signal output to the encoder 78, and 80 is an optical unit 7
1 is a read circuit, 81 is a servo circuit that moves the head positioning mechanism 74 by a servo signal included in a detection signal from the read circuit, 82 is a control unit that controls each unit, 83 is an interface unit with an external device, Reference numeral 84 denotes a disk device, which includes components denoted by reference numerals 70 to 83.

Next, the operation will be described with reference to the drawings. FD
Reference numeral 58 describes a case where the servo track is provided with mechanical track position information. When the recording medium 50 is being rotated by a medium driving motor (not shown), as shown in FIG. 8, the laser beam emitted from the LD 72 to the servo track of the recording medium 50 passes through the light transmitting section 70a and is transmitted to the recording medium 50a. The light is reflected by 50 and enters the PD 73. PD73
Detects relative position information indicating the track position deviation and relative angular velocity information indicating the rotational speed of the recording medium 50 based on the reflected light, and outputs a detection signal to the read circuit 80. The servo circuit 81 and the controller 82 perform feedback control based on the detection signal, drive the head positioning mechanism 74, and arrange the magnetic head 70 at a predetermined position. The magnetic head 70 magnetically records the information from the encoder 78 at a predetermined position, or detects the magnetically recorded information and outputs it to the decoder 76. The decoder 76 and the encoder 78 are connected to the interface unit 83 via first and second buffer memories 77 and 79, and the disk device 84 exchanges signals with external devices via the interface unit 83. The relative angular velocity information in the detection signal is used for controlling the rotation speed of the medium drive motor by detecting the rotation speed of the recording medium 50.

[0007]

The conventional FD 58 having a recording capacity of 1.44 Mbytes has a small recording capacity. For example, if one program is to be distributed, several tens of FDs 58 are required. Not suitable for distributing large amounts of the same information. On the other hand, the FD 58 having a recording capacity of 100 Mbytes or more has a sufficient recording capacity.
In the FD 58, the same information has to be recorded individually on the
In distributing a large amount of, the time and effort is increased and the cost is increased.

Further, the conventional CD-ROM 64 is
Since the information is recorded by providing the pit 61 on the head 0 by thermoforming or thermal stamping, the CD-RO on which the same information is recorded is recorded.
M64 can be manufactured relatively easily and inexpensively. However, it is difficult to correct the CD-ROM 64 after the pit 61 is formed. Further, since additional information cannot be recorded, for example, the number of times of copying cannot be recorded, and it is difficult to protect illegal copies. Therefore, forgively copying the information recorded on the CD-ROM 64 to a plurality of personal computers. As a result, there is a problem that copyright is easily infringed.

In general, information recorded on the FD 58 or the CD-ROM 64 is copied to a recording device such as a hard disk drive (not shown) mounted on a personal computer or the like, and operated by the personal computer or the like. However, when a large amount of information is to be recorded on a hard disk drive, a large storage capacity is inevitably required.
There are problems that a hard disk drive becomes complicated, a plurality of hard disk drives are mounted on a personal computer, and a configuration of an information processing device such as a personal computer becomes complicated. Further, in order to prevent the leakage of information left in the hard disk drive, for example, when transferring the information to the FD 58, a relatively large amount of time and labor is required, which is not efficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. A large amount of predetermined information can be copied in large amounts at a low cost in a short time, and other information can be recorded and reproduced for each user. The purpose is to obtain a possible recording medium. It is another object of the present invention to provide a disk device capable of reproducing predetermined information recorded on the recording medium and recording and reproducing information of each user.

It is another object of the present invention to provide a disk device capable of operating information by accessing a recording medium without copying predetermined information to a hard disk drive or the like mounted on a personal computer or the like.

[0012]

According to the present invention, there is provided a disk apparatus in which a disk-shaped recording medium having a magnetic track composed of a magnetic layer and a read-only track on which predetermined information is recorded by a plurality of recesses is detachably formed. A reproducing head for reproducing the predetermined information; a magnetic head for magnetically recording information on the magnetic track or reproducing the information recorded on the magnetic track; and positioning the reproducing head on the read-only track. And a head positioning mechanism for positioning the magnetic head on the magnetic track, and a control unit capable of operating the reproducing head and the magnetic head.

Further, in the disk device of the present invention, the head positioning mechanism positions the magnetic head on the magnetic track based on the track position information included in the first reproduction output of the reproduction head.

A recording medium according to the present invention comprises a disk-shaped substrate made of a flexible plastic material, a read-only track and a magnetic track provided on the substrate.
The read-only track records predetermined information by forming a plurality of non-plastic depressions in the substrate, and the magnetic track comprises a magnetic layer provided on the substrate.

In the recording medium of the present invention, a read-only track is provided on one surface of the substrate, and a magnetic track is provided on the other surface.

In the recording medium of the present invention, the read-only track and the magnetic track are provided concentrically at the same center.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the disk device and the recording medium of the present invention will be described. FIG. 1 is an explanatory view showing a recording medium according to Embodiment 1, and FIG.
Is an explanatory diagram showing one side and the other side of the recording medium shown in FIG. 1,
3 is a sectional view taken along line BB shown in FIG. 2, and FIG. 4 is a sectional view taken along line C shown in FIG.
It is a part enlarged view. In FIG. 1, 1 is a recording medium,
It is made of a flexible sheet of PET resin or the like, and is provided with a recess formed on one surface to record predetermined information, and an iron oxide-based magnetic recording material applied to the other surface and punched into a circle. . Some of the recording media having a large recording capacity have a metal iron magnetic powder coating film formed on the other surface. Reference numeral 2 denotes a hub, which is arranged at the center of the recording medium 1 and is fixed to the recording medium 1. Reference numeral 2a denotes a center hole provided in the hub portion 2, and 2b denotes a drive hole provided in the hub portion 2. Reference numeral 3 denotes a diskette for storing the recording medium 1, 4 denotes a window provided on the diskette 3, and 5 denotes a shutter for opening and closing the window 4. A flexible disk is constituted by the structures denoted by reference numerals 1 to 5. 2 to 4, reference numeral 1a denotes a flexible sheet made of a PET resin or the like constituting the recording medium 1, 6 denotes a reproduction-only track of the recording medium 1, and one surface of the sheet 1a with the center of the recording medium 1 substantially at the center. Are provided concentrically. Reference numerals 7 denote pits provided by subjecting the sheet 1a to depression on the read-only track 6 by thermoforming or thermoplastic embossing. Predetermined information is recorded depending on the presence or absence of the pits 7. 7a is a protective film, 8 is a magnetic layer, which is provided on the other surface of the sheet 1a. The magnetic layer 8 is formed by mixing a magnetic material such as iron oxide, metallic iron, or barium ferrite with a binder material and coating the other surface of the sheet 1a. Numeral 9 denotes a magnetic track, the center of which is substantially the same as that of the read-only track 1a, and a plurality of concentric circles are provided on the magnetic layer 8.

FIG. 5 is an explanatory diagram showing the disk device according to the first embodiment. In the figure, reference numeral 10 denotes a magnetic head for recording information on the recording medium 1 or reproducing the recorded information;
Reference numeral 11 denotes optical means for reproducing information recorded on the read-only track 6, and includes a laser diode (hereinafter, referred to as LD) 12, a photodetector (hereinafter, referred to as PD) 13, a lens 14, a half mirror 15, and the like. Having. Reference numeral 16 denotes a head positioning mechanism, on which the magnetic head 10 and the optical means 11 are mounted, and which is provided so as to be movable in the radial direction of the recording medium 1. 17 is a magnetic head 1
0 is a read / write circuit (hereinafter referred to as an R / W circuit). Reference numeral 18 denotes a read circuit (hereinafter, referred to as an R circuit) connected to the optical unit 11, and 19 denotes a servo circuit that controls the operation of the head positioning mechanism 16 based on a servo signal included in a reproduction signal of the R circuit 18. .

Reference numeral 20 denotes a decoder for demodulating a reproduced signal from the R / W circuit 17, 21 is a first buffer memory for temporarily recording an output from the decoder 20, and 22 is a temporary buffer for an input signal from an external device. A second buffer memory for temporarily recording, an encoder for modulating the output from the second buffer memory 22, a decoder for demodulating the output from the R circuit 18, and a temporary storage for the output from the decoder 24. A third buffer memory for recording, 26
Is a control unit, which is configured to include the components denoted by reference numerals 20 to 25, and controls the operation of each unit by the CPU 26a. Reference numeral 27 denotes an interface unit connected to the control unit 26 and the first to third buffer memories 21, 22, and 25, and exchanges signals with external devices. Reference numeral 28 denotes a disk device, which includes components denoted by reference numerals 10 to 27.

Next, the operation will be described with reference to the drawings. First, a case in which predetermined information recorded in the read-only track 6 is reproduced will be described. When the recording medium 1 is being rotated by a medium driving motor (not shown), the LD 12 emits light and the recording medium 1 is read-only via the lens 14 and the half mirror 15 as in the optical means 71 shown in FIG. When the track 5 is irradiated with a plurality of laser beams (three laser beams in the case of the three-beam method), the intensity of the reflected light changes depending on the presence or absence of the pits 7 of the read-only track 6 and is received by the PD 13. Is done. The PD 13 outputs a reproduction signal to the R circuit 18 based on the received light intensity. Next, the decoder 24 demodulates and outputs the reproduction signal from the R circuit 18. The control unit 26 temporarily records the output from the decoder 24 in the third buffer memory 25 and outputs a reproduction signal demodulated to the external device via the interface unit 27 at a timing that can be received by the external device.

On the other hand, the servo circuit 19 performs feedback control based on the relative position information indicating the track position deviation included in the reproduction signal of the R circuit 18, moves the head positioning mechanism 16, and sets the optical means 11 to a predetermined reproduction-only state. It is arranged on the track 6 and the focus position of the laser beam is adjusted.

Next, a case where information is recorded on the magnetic track 9 or a case where the recorded information is reproduced will be described. Upon receiving an instruction to record information from an external device, the control unit 26 performs a head positioning mechanism so that the magnetic head 10 is arranged on a predetermined magnetic track 9 based on the track position information included in the reproduction signal from the optical unit 11. 16 is driven. The disk device 28 records the relative positional relationship between the read-only track 6 and the magnetic track 9 when the recording medium 1 is mounted. That is, there is a calibration area on the innermost circumference of the recording medium 1, and when the recording medium 1 is mounted, the relative positional deviation between the read-only track 6 and the magnetic track 9 is detected, and the positioning is performed when the magnetic track 9 is positioned on-track. The off-track amount of the reproduction-only track 6 is recorded.

Next, the control unit 26 modulates the write information temporarily recorded in the second buffer memory 22 by the encoder 23, and modulates the write information on the predetermined magnetic track 9 by the magnetic head 10 via the R / W circuit 17. Record the information in

When information recorded on the magnetic track 9 is reproduced, the magnetic head 10 is similarly moved to a predetermined magnetic track 9 based on a reproduction signal from the optical means 11 to reproduce the information from the magnetic head 10. The signal is demodulated by the decoder 20 via the R / W circuit 17, temporarily recorded in the first buffer memory, and output at a timing that can be received by an external device. In the first embodiment, the interface is a USB (Universal Serial).
Bus) system is used.

According to the recording medium 1 according to the first embodiment, by pre-recording information in the read-only track 6 with the pits 7, mass distribution of the same information can be easily performed at low cost, and magnetic recording can be performed. Since it has the magnetic track 9 that can be recorded and reproduced, it is possible to provide a means for preventing addition or change of user-specific information or unauthorized copying that infringes copyright. Also, the disk device 28
Since the information recorded on the read-only track 6 of the recording medium 1 can be reproduced and the information can be recorded on the magnetic track 9 or the recorded information can be reproduced, for example, it is created using a program recorded on the read-only track 6. Data,
The use setting conditions, history, results, etc. can be magnetically recorded on the recording medium 1, eliminating the need to copy the program of the recording medium 1 to a hard disk drive or the like mounted on a personal computer or the like. The configuration of a personal computer or the like can be simplified.

When the information recorded on the recording medium 1 is used, the recording medium 1 is inserted into a disk device to perform an information operation by an external device, and a result of the information operation is recorded on a magnetic track of the recording medium 1. 9 and ejecting and storing the recording medium 1 after the operation is completed, information is not left in an external device such as a personal computer, and information leakage to a third party can be easily prevented.

In the recording medium 1, the read-only track 6 and the magnetic track 9 are individually arranged on one surface and the other surface, but they are arranged concentrically so that they are alternately arranged for every arbitrary number of tracks. Is also good. For example, the magnetic track 9 has a width of about 10 μm and a pitch of about 12 μm, and a read-only track 6 having a track width of 1 μm or less is provided for every two magnetic tracks. Also in this case, magnetic recording and reproduction are performed as described above.

[0028]

According to the disk apparatus of the present invention, information can be recorded on a recording medium having a read-only track and a recordable / reproducible magnetic track, or the recorded information can be reproduced. The data created using the created program and the setting conditions, history, and results of use can be magnetically recorded on the recording medium, and the program of the recording medium can be recorded on a hard disk drive installed in a personal computer or the like. It is not necessary to copy such information, and the configuration of a personal computer or the like can be simplified. When using information recorded on a recording medium,
By inserting the recording medium into a disk device and performing information operations with an external device such as a personal computer, recording the result of the information operation on a magnetic track of the recording medium, and ejecting and storing the recording medium after the operation is completed, The information does not need to be left in an external device such as a personal computer, and information leakage to a third party can be easily prevented.

Further, according to the recording medium of the present invention, when the recording medium is manufactured, the same information can be easily distributed in large quantities at low cost by recording the information on the read-only track by using a depression or the like. In addition, since it has a magnetic track that can be magnetically recorded and reproduced, it can be used as a means for preventing the addition or change of user-specific information or unauthorized copying that infringes copyright.

[Brief description of the drawings]

FIG. 1 shows a recording medium according to a first embodiment of the present invention.

FIG. 2 is a plan view showing one and other surfaces of a recording medium.

FIG. 3 is a sectional view taken along line BB shown in FIG. 2;

FIG. 4 is an enlarged view of a portion C shown in FIG.

FIG. 5 is an explanatory diagram showing a disk device according to the first embodiment.

FIG. 6 is an explanatory diagram showing a conventional recording medium.

FIG. 7 is an explanatory diagram showing another conventional recording medium.

FIG. 8 is an explanatory diagram showing a conventional disk device.

FIG. 9 is a diagram illustrating the operation of a conventional disk device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Recording medium, 2 Hub part, 2a Center hole, 2b
Drive hole, 3 diskette, 4 window, 5 shutter, 6 playback-only track, 7 pits, 8
Magnetic layer, 9 magnetic tracks, 10 magnetic heads,
11 optical means, 12 LD, 13 PD, 1
4 lens, 15 half mirror, 16 head positioning mechanism, 17 R / W circuit, 18 R circuit, 1
Reference Signs List 9 servo circuit, 20 decoder, 21 first buffer memory, 22 second buffer memory, 2
3 encoders, 24 decoders, 25 thirds
Buffer memory, 26 control unit, 26a CP
U, 27 interface unit, 28 disk unit.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 21/10 G11B 21/10 M (72) Inventor Tadashi Sato 2-3-2 Marunouchi 2-chome, Chiyoda-ku, Tokyo F term in Mitsubishi Electric Corporation (reference) 5D006 DA00 DA02 DA04 DA09 5D029 JB26 JB50 KA01 KC09 5D031 AA04 EE06 HH05 5D096 AA02 AA05 BB01 CC01 EE01 MM01

Claims (5)

[Claims] 1. A reproducing head for removably forming a disk-shaped recording medium having a magnetic track composed of a magnetic layer and a read-only track on which predetermined information is recorded by a plurality of recesses, and reproducing the predetermined information. Unit, a magnetic head unit that magnetically records information on the magnetic track or reproduces information recorded on the magnetic track, and positions the read head unit on the read-only track and places the magnetic head unit on the magnetic track. A disk drive comprising: a head positioning mechanism for positioning; and a control unit capable of operating the reproducing head and the magnetic head. 2. The disk according to claim 1, wherein the head positioning mechanism positions the magnetic head on the magnetic track based on track position information included in the first reproduction output of the reproduction head. apparatus. 3. A disk-shaped substrate made of a flexible plastic material, and a read-only track and a magnetic track provided on the substrate, wherein the read-only track has a plurality of depressions formed in the substrate. Wherein the magnetic track is formed of a magnetic layer provided on the substrate. 4. The recording medium according to claim 3, wherein a read-only track is provided on one surface of the substrate, and a magnetic track is provided on the other surface. 5. The recording medium according to claim 3, wherein the read-only track and the magnetic track are provided concentrically at the same center.