JPH05128616A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To prevent reproduction and the successional property of data from being injured by providing with a detected part discriminating the kind of a disk with the sticking condition of a disk cassette by a detecting part on the disk cassette, etc., and driving a load/unload mechanism by the detected result. CONSTITUTION:At the time of unloading the disk cassette, the unload condition of a magnetic head 4 is maintained by the constitution of a solenoid 21, an inversion mechanism 22 and a spring mechanism 23. Then, when the cassette 10 is loaded, is detected by a confirmation sensor 16 and the detected part 110 of a disk kind provided on the cassette 10 is detected by a disk kind detecting sensor 15. At this time, the detected signal of the sensor 16 becomes 'H', and the disk is judged as a magnetic field modulation disk by a disk controller and the control signal based on the judgement is sent to a driving circuit. A pressure energizing member 7 is raised, is rotated and separated from a rotating and sliding part by a driving output, thus, an engaging member 9 is rotated around a supporting shaft 12 by a rotating member 11 and the magnetic head is loaded on a disk surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erasable and rewritable magneto-optical disk device, and in particular, a magneto-optical disk capable of magnetic field modulation overwriting and a magneto-optical recording type magneto-optical disk are used in combination. The present invention relates to a magneto-optical disk device that is suitable under such circumstances.

[0002]

2. Description of the Related Art FIG. 9 and FIG.
FIG. 49 shows a conventional magnetic field modulation type magneto-optical disk device described in Japanese Patent Publication No. 49, in which there are an optical head and a magnetic head equipped with an objective lens driving device, and a retracting mechanism for the magnetic head. The optical head and the magnetic head are integrally connected so as to interlock with each other, and
A mechanism for retracting the magnetic head from the mounting area of the cassette is mounted on the optical head when the disk and the disk cassette are mounted and dismounted from the disk loading portion of the magneto-optical disk device. In this case, the magnetic head is loaded onto the disk only by detecting and confirming only the loading of the cartridge without determining the type of the disk.

[0003]

The magneto-optical disk device in the above-mentioned prior art has the following drawbacks because the operation control of the magnetic head retracting mechanism is limited as described above. .. That is, in the case where the apparatus configuration shown in FIG. 9 is used to prepare the apparatus to start up by the algorithm shown in FIG. 10, the following problems occur.

A standardized magneto-optical disk which has not been dealt with in particular for magnetic field modulation overwrite,
When loaded in a conventional magnetic field modulation overwrite magneto-optical disk device, there is no detection means or judgment circuit for detecting the type of the disk, so that the disk on the back side of the disk surface facing the optical head The levitation type magnetic head is loaded on the recording medium film portion.

In this case, there is a great risk of damaging or destroying the recording medium film of the disk which is not compatible with the magnetic field modulation overwrite, and at the same time, it is difficult to fly the magnetic head, so that the magnetic head may be damaged. There is. Furthermore, in order to prevent the above accidents, when the disk that is not compatible with the magnetic field modulation overwrite is configured so that it cannot be physically attached to the loading portion of the device,
Playability and data inheritance of discs already in widespread use are significantly impaired.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. In addition to the detection of the mounting of the disc cassette, the presence or absence of recording inhibition can be detected depending on the type of the disc. With respect to the above, the present invention intends to provide a magneto-optical disk device that can be used without impairing reproduction and inheritance of data.

[0007]

Therefore, according to the present invention,
A disc is composed of a transparent plate and a magneto-optical medium film and a protective film on the transparent plate, and an optical pickup mechanism for irradiating the magneto-optical medium film with a laser beam to write and read a magneto-optical signal is provided on the transparent plate side of the disc. The magnetic head for magnetic bias is located on the side of the protective film of the disk facing the optical pickup mechanism, and the magnetic head is a floating type that floats by relative motion with the disk, and In a magneto-optical disk device equipped with an objective lens driving device so that the optical pickup mechanism and the magnetic head are integrally or individually driven to move the sled in the track direction of the disk, the disk cassette is A mechanism for loading / unloading the magnetic head with respect to the disk when loaded, and the loaded disk A type detection means for detecting the type of the disc from the set and / or the disc, and the disc cassette and / or the disc is equipped with a detected part for discriminating the type of the disc by the detecting part in the mounted state. Therefore, the load / unload mechanism is driven based on the detection result of the detection means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS. FIG. 1 shows a drive unit of a magneto-optical disk device according to the present invention, in which a seek motor 1 is used to drive an optical head 3 (optical pickup mechanism) mounted on a carriage 2 and a floating magnetic head 4. At the same time, seek operation is performed. The magnetic head 4
Of the magnetic head is flipped up by a magnetic head flip-up mechanism 5 provided there. That is, the magnetic head 4 includes the rotating member 1 via a load beam such as a leaf spring.
The rotary member 11 is rotatably supported on the carriage 2 by a support shaft 12.
The magnetic head flip-up mechanism 5 includes a rolling sliding contact portion 6 that rolls and contacts a pressing biasing member 7 provided in a magnetic head retracting mechanism (see FIG. 2) provided on the chassis side. 11, and when the pressing biasing member 7 moves up and down in the figure, by biasing the rolling sliding contact portion 6 by pressing, the rotating member 11 is rotated,
The magnetic head can be retracted from the magneto-optical disk 8.

The operation mode of the magnetic head retracting mechanism (magnetic head retracting mechanism) is shown in FIGS. 2 and 3. Here, a disc type detection sensor 15 and a write-inhibition detection sensor 16 which also functions as a confirmation sensor for confirming loading of the disc cassette 10 accommodating the magneto-optical disc are arranged on the chassis of the magneto-optical disc device. .. Then, the disk 8 is rotationally scanned by a spindle motor 20, and recording / reproducing is performed by irradiation of a laser spot by the optical head 3.

The magnetic head 4 is, as shown in FIG.
The solenoid 21, the reversing mechanism 22, and the pressing biasing member 7
The unloading state can be always maintained by the configuration with the spring mechanism 23 for urging the lower part.

As shown in FIG. 2, when the disc cassette 10 is not loaded, the detection sensor 15 and the detection sensor 16 are not output (the output signal is at L level).
Is. In this state, the magnetic head driving means 24 is in the non-driving state, the pressing biasing member 7 is held in the lowered position,
The rolling sliding contact portion (engaging portion) 6 of the magnetic head splashing mechanism is pressed and held by the pressing biasing member 7.

FIG. 3 shows a state in which a magnetic field modulation overwritable disk is loaded in the loading portion of the magneto-optical disk apparatus. At this time, the magnetic head 4 is operated so as to contact the disk surface. The control in this case will be described below according to the algorithms of FIGS. 6 and 7.

Here, first, the loading of the disk cassette is detected by the confirmation sensor 16 (at the step e). Next, the disc type detection target portion 110 (see FIG. 5) provided in the disc cassette 10 is detected by the disc type detection sensor 15 (at step h). In this case, the detection signal of the detection sensor 16 becomes H level, and the disc is a control circuit (controller).
At 25, the disc is determined to be a magnetic field modulation disc, and a control signal based on the determination is sent to the drive circuit 24. Then,
The pressing biasing member 7 moves up and moves away from the rolling sliding contact portion 6. In this case, since the rotating member 11 is spring-biased (not shown) in the carriage 2 loading direction of the magnetic head about the support shaft 12, the magnetic member provided on the rotating member 11 is The engaging member 9 for defining the load position of the head rotates about the support shaft 12 until it comes into contact with the engaging portion 13 provided on the carriage 2,
This completes the loading of the magnetic head onto the disk surface.

On the other hand, FIG. 4 shows, for example, a ROM disk or a magneto-optical disk 8 that does not support magnetic field modulation overwrite.
Shows the state of being loaded in the loading part. Here, no detection signal is output from the disk type detection sensor 15 (that is, the output signal is at H level), and therefore,
The magnetic head is not loaded. However, since the pressing biasing member 7 extends in the seek direction of the carriage 2 and the rolling sliding contact portion 6 makes rolling sliding contact with the pressing biasing member 7, the magnetic head remains unloaded. , Seek is possible.

[0015]

[Other Embodiments] In the above embodiments, the disc type is determined only by detecting the disc type on the disc cassette, but it is also possible to include the configuration described below. That is, according to the algorithm shown in FIG. 7, the magnetic head 4 is held in the unload state until the READY state shown in FIG. 6 described above, and then the disc type is detected for the disc cassette (step p). Then, the control circuit 25 compares this with the recorded information on the disc (at the steps q and t) to detect erroneous detection in the detected portion provided in the disc cassette portion and other cassettes. It is also possible to adopt a format in which priority is given so as to prevent erroneous recognition of. In this case, the disc type detection sensor also serves as the information detection unit in the optical head.

Further, the disc type detecting means employs a microswitch structure as the disc type detecting sensor 15, and the detected portion is provided separately from the hole for the detected portion 100 (for write inhibition). Although a hole is used in 110, as shown in FIGS. 5 (a) to 5 (c),
The following combinations are also possible. That is,
In FIG. 5 (a), a combination of a hole and an optical proximity sensor (which detects the presence or absence of returning light) is combined, and in FIG. 5 (b), a combination of a ferromagnetic material and a magnetic sensor (Hall element / magnetoresistive element). In FIG. 5 (c), a combination of a high light reflecting material tape or coating film and an optical sensor (detecting the amount of returning light) can be considered.

[0017]

As described above, the magneto-optical disk device of the present invention can reproduce and inherit the data of a distributed disk which does not correspond to the conventional overwrite, and can be used for the magnetic field modulation overwrite. It is possible to use it together with other discs.

[Brief description of drawings]

FIG. 1 is a perspective view of constituent parts showing an embodiment of the present invention.

FIG. 2 is a configuration diagram of a control portion of the present invention.

FIG. 3 is a configuration diagram of a control portion of the present invention.

FIG. 4 is a configuration diagram of a control portion of the present invention.

FIG. 5 is a perspective view of the disc cassette of the present invention.

FIG. 6 is a flow chart showing the control process of the present invention.

FIG. 7 is a flowchart showing the control process of the present invention.

FIG. 8 is a schematic view showing a drive mechanism for loading / unloading a magnetic head.

FIG. 9 is a schematic configuration diagram conceptually showing a conventional example.

FIG. 10 is a flowchart showing a control process of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 seek motor 2 carriage 3 optical head 4 magnetic head 5 magnetic head splashing mechanism 6 rolling sliding contact portion 7 pressing biasing member 8 disk 9 engaging member 10 cassette 11 rotating member 12 support shaft 13 locking portion 15, 16 detection Sensors 100, 110 Detected part 21 Solenoid 22 Inversion mechanism 23 Spring mechanism 24 Magnetic head drive means 25 Control circuit (controller)

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[Procedure amendment]

[Submission date] November 18, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 7

[Correction method] Change

[Correction content]

Claims (7)

[Claims] 1. An optical pickup mechanism comprising a transparent plate, a magneto-optical medium film and a protective film above the transparent plate, and irradiating the magneto-optical medium film with a laser beam to write and read a magneto-optical signal. A floating type which is disposed on the transparent plate side of the disk, is opposed to the optical pickup mechanism, and positions a magnetic head for magnetic bias on the protective film side of the disk, and floats the magnetic head by relative movement with the disk. In addition, the optical pickup mechanism and the magnetic head are integrally or individually driven so that the sled is moved in the track direction of the disk.
In a magneto-optical disk device equipped with an objective lens driving device, a mechanism for loading / unloading the magnetic head with respect to the disk when the disk cassette is installed, and the installed disk cassette and / or disk From the disc cassette and / or the disc cassette is equipped with a detected part for discriminating the disc type by the detecting part in the mounted state. A magneto-optical disk device characterized in that the load / unload mechanism is driven based on the detection result of the detection means. 2. The disc type detecting means, based on a signal read by the optical pickup from recorded information provided on the disc and a detection signal detected from a detected portion provided on the disc cassette, The magneto-optical disk device according to claim 1, comprising a controller configured to compare and determine the types of the disks. 3. The disc cassette is characterized in that the non-detection portion detected by the disc type detection means is constituted by a hole or a light reflecting member provided on the cassette surface. The magneto-optical disk device described in 1. 4. A mechanism for loading / unloading the magnetic head onto / from the disk is driven based on a control signal from the controller, and the control signal is output from the disk type detecting means. The magneto-optical disk device according to claim 2, wherein the magneto-optical disk device is set based on a detection signal from the disk cassette and / or the disk. 5. A mechanism for loading / unloading the magnetic head to / from the disk presses the rolling sliding contact portion provided on a member holding the magnetic head and the rolling sliding contact portion. A pressing urging member provided on the chassis, and the pressing urging member abuts the rolling sliding contact portion over the entire movement track of the magnetic head in the disk radial direction so as to urge the pressing. 2. The magneto-optical disk device according to claim 1, wherein the pressing bias member extends in the disk radial direction. 6. The drive means for driving the pressing biasing member is controlled so as to release the biasing force of the pressing biasing member with respect to the rolling sliding contact portion in an energized state. The magneto-optical disk device according to claim 5. 7. A mechanism for loading / unloading the magnetic head to / from the disk includes an engaging member provided on a head holding member for holding the magnetic head, and a spring member provided on the objective lens driving section. The head holding member is constantly urged in the unloading direction of the magnetic head by using the engaging member, and the engaging member is engaged with a locking portion provided on the objective lens driving device to move the load position of the magnetic head. The magneto-optical disk device according to claim 1, wherein the magneto-optical disk device has a specified structure.