JPH01102760A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To realize high-speed recording by connecting and supporting a magneto- optical head and a magneto-optical disk by a linking body, and making the magnetic pole of a magnetic field modulation head approach adjacently to the plane on the other side of the disk with a micro gap by interposing a sliding member. CONSTITUTION:The thread travel of the magneto-optical head 20 and the magnetic field modulation head 30 are performed in the radius direction of a disk D simultaneously in the same direction on one side and the other side via the disk d to be rotated, and also, tracking servo is performed on them. At this time, since two heads 20 and 30 are coupled oppositely on the surface and the rear plane of the disk D, positioning can be performed accurately so that the magnetic pole of the magnetic field modulation head 30 can coincide with the laser projecting position of the magneto-optical head 20. Furthermore, since the magnetic pole of the magnetic field modulation head 30 is kept at a constant micro gap via the sliding member 304, a high externally generated magnetic field corresponding to an applying current is supplied to the disk D. A laser beam with constant strength is projected continuously, and the direction of magnetization of the disk D is faced to a recording direction. In such a way, the high-speed recording can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magneto-optical disk device capable of recording/reproducing, erasing/rewritable data, and more particularly to a magneto-optical disk device capable of being overridden using a magnetic field modulation recording method.

2. Description of the Related Art Magneto-optical disks are examples of erasable and rewritable optical disks. There are two main methods for recording information on this magneto-optical disk. One is a light modulation method, and the other one is a light modulation method.
The first method uses magnetic field modulation.

The former optical modulation method is a method that keeps the direction of the external magnetic field applied to the medium constant, modulates the intensity of the laser light according to the recording signal, and records the signal by blinking the light. occupied the mainstream. However, with this optical modulation method, new information cannot be written directly onto a recording track on which old information has been written, unlike a normal magnetic recording method. In other words, immediate override is not possible. Therefore, to write new information,
A separate erase operation is required to temporarily erase old information, and it requires one rotation for erasing, one rotation for writing, and one rotation for confirmation (read).
It takes at least three revolutions to write data to the disk. As a result, rotational waiting time occurs, which becomes a bottleneck, making the configuration extremely disadvantageous for high-speed access. In addition, even in the case of partial rewriting, it is necessary to wait for one revolution, resulting in a lot of loss time, which is particularly unsuitable for a sector management type disk system.

On the other hand, in the magnetic field modulation method, a laser beam is continuously irradiated onto the disk medium at a constant intensity, and the direction of the magnetic field applied by the magnetic head is reversed according to the recording signal to record in the area irradiated with the light. It is something. Based on the recording principle, the magnetic field modulation method, like the normal magnetic recording method, allows new information to be written directly onto a recording track on which old information has been written. Therefore, unlike the optical modulation method, there is no need to perform a separate erasing operation, and overriding can be performed immediately. Therefore, it is beginning to attract attention as a recording method when overwriting is required.

Problems to be Solved by the Invention Taking advantage of the excellent features of the above-mentioned magnetic field modulation recording method, we have developed a device that can record, reproduce, erase, and rewrite, and can be overridden instantly.
It is not so easy to realize this to a practical level using one head, as there are many problems that need to be solved as described below. The problems are as follows.

■The beam convergence position of the laser beam irradiated from the magneto-optical head onto the disk medium surface is precisely aligned with the position of the magnetic pole of the magnetic field modulation head, that is, the position where the external magnetic field generated from the magnetic pole is applied to the medium. , and how to configure it so that the two positions can be moved while accurately synchronizing with each other. In this case, controlling the positions of the two heads independently would require extremely advanced control technology to perform tracking servo, far-of-the-ear access, and quick access, which is currently extremely difficult.

(2) In order to reliably reverse the magnetic field on the recording medium, it is necessary to increase the externally generated magnetic field Htr applied from the magnetic field modulation head to a recording threshold magnetic field (Hth), for example, 200 to 300 de (Oersted) or more. This externally generated magnetic field H-tr is calculated by Htr
It is expressed as ocμ·i/r. Therefore, simply thinking, in order to reduce the head weight of the magnetic field modulation head and to increase the externally generated magnetic field Htr, the magnetic pole of the head is formed of a high-bandwidth, high-permeability ferrite material, etc. The magnetic pole diameter r is made as small as possible, and a large current i is applied to the coil.
It is said that it is okay to let it flow. However, magnetic field modulation heads
Generally, as the modulation frequency increases, the generated magnetic field 1 (tr) tends to become smaller. Therefore, the recording threshold magnetic field 200
It is extremely difficult to generate 300 DE or more and also obtain high high frequency characteristics (for example, IM Hz or more).

Furthermore, there is a limit to the current value of the drive amplifier that drives the magnetic field modulation head due to impedance characteristics, and it is not possible to flow such a high current. For example, when the modulation frequency is about IMHz or higher, the impedance Z suddenly increases, so a very high current cannot be applied. Therefore, in order to increase the magnetic field applied to the medium in accordance with the applied current, it is necessary to bring the magnetic pole of the head as close as possible to the medium surface (for example, the current value limit of the drive amplifier is 0°7A).
(If the disc is tilted, the gap with the medium surface is about 0.05 mm). However, when such a small gap is set, it is extremely difficult to control the magnetic field modulation head to accurately follow the surface runout and eccentricity associated with disk rotation, and the problem arises as to how to solve this problem. .

Related to ■■, when the magnetic gap between the magnetic pole of the magnetic field modulation head and the medium surface is made as small as about 0.05 mm, if the disk has warpage, unevenness, or dirt, the disk rotation will be affected. As a result, the disk collides with the head, causing a crash, which may damage not only the head itself but also the disk medium. How do we solve this problem?

Unless the problems described in (1) to (4) are solved, a magneto-optical recording device based on the magnetic field modulation method cannot be put into practical use.

This invention was proposed to solve the above-mentioned problems, and it is possible to accurately align the magnetic pole of a magnetic field modulation head and the beam convergence position of a laser beam of a magneto-optical head, and to feed a thread. It is an object of the present invention to provide a magneto-optical disk device in which the magnetic pole of a magnetic field modulation head can be moved while maintaining a constant minute gap from the disk medium without causing a crash or the like.

Means for Solving the Problems In order to achieve the above object, the present invention connects and supports a magneto-optical head on one side of a magneto-optical disk by a coupling body, and connects and supports the magneto-optical head on the other side of the coupling body via the disk. A support arm is rotatably supported on the side extension, and a magnetic field modulation head is supported on this support arm via an elastically displaceable lever body such as a cantilever, and its magnetic pole is supported by a rubber or felt damper. The gist is that a sliding member is interposed between the disk and the disk surface so that it is brought close to the disk surface with a small gap.

When recording information on a magneto-optical disk, a magneto-optical head and a magnetic field modulation head are thread-fed simultaneously in the same direction in the radial direction of the disk on one side and the other side of the rotating disk, and tracking servo is applied. Ru. At this time, since the two heads are connected to each other at the front and back of the disk via a coupling body, they are accurately aligned so that the magnetic pole of the magnetic field modulation head and the laser beam irradiation position of the magneto-optical head coincide. .

Furthermore, since the magnetic poles of the magnetic field modulation head are maintained at a constant minute gap via a sliding member that is in sliding contact with the disk medium surface, a high externally generated magnetic field is applied to the medium in accordance with the applied current. This also allows the magnetic pole gap (
The gap can be kept constant by following the surface runout and eccentricity of the disk.

At that time, the magnetic poles are protected by sliding members, so
Crash with the disk surface can be definitely avoided.

During recording, laser light of a constant intensity is continuously irradiated from the magneto-optical disk onto the medium surface of the disk.

Under this continuous irradiation, a high frequency current corresponding to the recording signal is passed through the magnetic field modulation head, and a modulated magnetic field corresponding to the recording signal is applied from the magnetic pole to the laser beam irradiation position. This directs the magnetization of the disk medium toward the recording direction.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing the overall configuration of a magneto-optical disk device according to the present invention, FIG. 2 is a perspective view of the main parts thereof, FIG. The figure is a sectional view of the main part.

In these figures, a disk drive motor, a so-called spindle motor 11, is mounted on a base 10 inside the device main body.
It is installed with the drive shaft facing vertically upward. A turntable 12 having a center shaft 12a is attached to the drive shaft of the spindle motor 11. Directly above the turntable 12, a disk clamper 13 is supported at the tip of a clamp arm 32 so as to be rotatable and movable up and down. The disk D is loaded onto the turntable 12 and ejected by a horizontal loading method. The disk D loaded on the turntable is pressed and held by the lowering of the disk clamper 13.

A magneto-optical head 201 is disposed on one side (lower side in the illustrated example) of the loading position of the disk D, and a magnetic field modulation head 3o is disposed on the other side (upper side in the illustrated example) facing each other.

The two heads 20130 face each other and simultaneously perform thread feeding and tracking servo in the disk radial direction.

A screw shaft 15 for head feeding and a guide shaft 16 are supported on one side of the spindle motor 11 in parallel with the disk radial direction. A magneto-optical head 20 is screw-fitted and supported by the feed screw shaft 15 and the guide shaft 18 so as to be slidable in the disk radial direction. The feed screw shaft 15 is driven by a gear 18 by the head feed motor 17.
．． It is rotated in forward and reverse directions through the engagement of 19. Due to this rotational drive, the magneto-optical head 20 is thread-fed back and forth in the radial direction of the disk. At the same time, the magnetic field modulation head 30
are threaded opposite each other in the same direction through the coupling.

One end side of a coupling body 21 is connected and supported by the magneto-optical head 20 . The other side of the connecting body 21 extends outward in the radial direction of the disk, is bent upwardly in a substantially square shape, and is extended to the other side of the disk D. A base end portion of a support arm 22 is supported at the extended end via a pin 23 so as to be rotatable up and down. A cantilever 24 is supported on the support arm 22 via rubber dampers 25, 25 so as to be elastically displaceable. A magnet 26 is attached to the base of the cantilever 24, and is attracted to either side by the current flowing through the coils 27 and 27, so that the cantilever 24 is elastically displaced in the tracking direction. This elastic displacement causes the magnetic field modulation head 30 supported at the tip of the cantilever 24 to perform tracking servo with respect to the recording track of the disk D. This tracking servo is performed simultaneously and in the same direction in synchronization with the magneto-optical head.

On the other hand, on one side of the disk loading position, a pair of support metal fittings 31 and -31 are erected on the base 10, and a disk clamp arm 32 is attached to the support metal fittings 31 and 31 through pins so as to be able to move up and down. Rotatably supported. The disk clamper 13 described above is rotatably supported at the tip of the clamp arm 32. A rotating drum 33 called a slant drum or a helical drum is supported near the support position of the clamp arm 32 so as to be rotatable in forward and reverse directions. A gear 331 is integrally formed on the lower outer periphery of the rotating drum 33. This gear 331 may be separate from the drum 33, and may be assembled together. This gear 331 meshes with a worm gear 35 provided on the shaft of the clamp motor 34. By driving the clamp motor 34 in forward or reverse rotation, the rotating drum 33 is rotated in the forward or reverse direction through the engagement of the gear 33L35. The clamp arm 32 is guided upward or downward by the forward or reverse rotation of the rotating drum 33, and is rotated upward or downward. When the clamp arm 32 is rotated upward or downward, the disk D loaded on the turntable 12 is clamped or unclamped.

A guide groove 332 is formed on the circumferential surface of the rotating drum 33 so as to extend spirally in the circumferential direction from the lower base to near the upper end. The guide groove 332 has a helical slope surface, and the guide pin 321 extending from the clamp arm 32 is guided on this slope surface. The clamp arm 32 is biased by a coil spring 36 wound around a pin of the support metal fitting 3L31 in a direction to separate the disk clamper 13 from the turntable 12, that is, in an upward movement direction. Due to this bias, the guide pin 321 is brought into contact with the slope surface of the guide groove 332 of the rotating drum 33 so as not to come off.

Therefore, when the rotating drum 33 is rotated in the forward and reverse directions by the drive of the motor 34, the disk clamp arm 32 moves within the range of the vertical stroke of the guide groove 332.
The disk D is rotated up and down in the direction of clamping or unclamping.

The magnetic field modulation head 30 is raised or lowered relative to the disk D in conjunction with the vertical rotation of the disk clamp arm 32 by the link means 40. The link means 40 is linked to the vertical rotation of the clamp arm 32 to electrically connect and connect it.
When the clamp arm 32 is detached and rotated downward, the magnetic field modulation head is brought into contact with the recording surface of the disk D, and when it is rotated upward, it is raised and separated from the recording surface of the disk D. The link means 40 includes a magnet 41 attached to the upper side of the connecting body 21, a coil 42 wound around the magnet 41, and a base of the support arm 22 supporting the magnetic field modulation head 30, which faces the magnet 41. The magnetic field modulating head 30 is made up of an adsorbed body 43 made of an iron plate or the like attached to the disk D, and a spring 44 that constantly biases the magnetic field modulation head 30 in the upward direction to detach from the disk D via the adsorbed body 43. One end of the spring 44 is connected to the object to be attracted 43, and the other end is connected to the connecting body 21 via a metal fitting so as to apply a force in the upward direction. When the rotating drum 33 rotates forward, the clamp arm 32 rotates downward to a predetermined position, and when the disk clamper 13 is pressed against the turntable 12 via the disk D, a light emitting element of a photocoupler 45, which will be described later, is activated. The light emitted from the light receiving element is blocked, and a current is caused to flow through the fill 42 of the link means 40 in response to an off signal from the light receiving element. As a result, the object to be attracted 43 is attracted and held by the attraction action of the magnet 41.

Then, the magnetic field modulation head 30 is lowered against the spring 44 using the base end of the support arm 22 as a fulcrum. Further, when the rotating drum 33 is reversed, the clamp arm 32 is rotated upward to a predetermined position, and the disk clamper 13 is separated from the surface of the disk D. Then, the light emitted from the light emitting element of the photocoupler 45 is blocked again. The current flowing through the coil 42 is interrupted by the signal from the light receiving element. Then, the attraction effect of the magnet 41 on the object to be attracted 43 is released,
The magnetic field modulation head 30 is detached from the disk D by the bias of the spring 44, and returns to the upper position.

On the other hand, a photocoupler 45 consisting of the above-mentioned light emitting element and light receiving element is arranged on the side of the rotating drum 33, and when the rotating drum 33 is rotated by a predetermined angle in the forward and reverse directions, the photo coupler 45 is arranged around the rotating drum 33. Light emitted from the light emitting element is blocked by a pin 46 protruding from the surface. By blocking this light, an on/off detection signal is output from the light receiving element. This signal causes the linking means 40 to be coupled or disengaged. That is, the current is applied to or removed from the coil 42, and the magnetic field modulation head 30 is moved upwardly away from the disk D or brought into contact with it downwardly due to attraction by the magnet 41 or its release.

Note that the beam convergence position of the laser beam irradiated onto the disk D through the objective lens 200 of the magneto-optical head 20 and the position of the magnetic pole 300 of the magnetic field modulation head 30 are accurately aligned in advance.

The magneto-optical head 20 includes an outgoing optical system that converges and irradiates a laser beam emitted from a semiconductor laser onto a disk D through an objective lens 200, and detects a servo error and detects an MO (magneto-optical) reproduction signal by detecting a laser beam reflected by the disk D. It consists of a return optical system that leads to the detection system. The magneto-optical head 20 is servoed in the focusing and tracking directions based on the focus and tracking error signals detected by this servo error detection system. With this, the laser beam irradiated onto the disk through the objective lens 200 is controlled to correctly follow the recording track.

On the other hand, the magnetic field modulation head 30 is constructed as shown in FIGS. 3 and 4.

The magnetic field modulation head 30 consists of a magnetic pole 300 made of a ferrite material with good high frequency characteristics, a high band, and high magnetic permeability, and a coil 302 wound around a howling groove 301 formed at the lower part of the outer periphery of the magnetic pole 300. The magnetic pole 300 is held by a head holder 303 attached to one surface of the cantilever 24 through a hole 241 formed at its tip. The holder 303 is formed into a cylindrical shape with an open end, and a ring-shaped pad 304 is fixed along the periphery of the open end. The pad 304 is made of artificial leather or the like with high sliding properties, which is used for rubber dampers, etc., and is brought into sliding contact with one surface of the disk D. When the pad 304 comes into contact with the surface of the disk D, the magnetic pole 300 of the head 30 is held with a constant minute gap between it and the disk surface. This gap t is determined by the drive amplifier (
Considering the current value limit (not shown), etc., in order to obtain the necessary externally generated magnetic field Htr, it is set to, for example, 0°05 or less. When recording and reproducing information, the magnetic field modulation head 30
The magnetic pole 300 is in sliding contact with the surface of the disk D via the pad 304, and even if, for example, the disk has surface wobbling, eccentricity, warping, etc., there is always a constant minute gap between the magnetic pole 300 and the recording surface of the disk D. The gap t is maintained. Moreover, the magnetic pole j00 is protected by the pad 304, and direct contact with unevenness or dust on the disk surface is avoided, so that a crash with the disk surface is effectively prevented.

The peripheral wall of the head holder 303 has a gap t between the magnetic poles 300.
An adjustment hole 303a for adjusting is formed as an opening. On the other hand, an annular groove 300a corresponding to the adjustment hole 303a is formed on the circumferential surface of the magnetic pole 300. To adjust the gap t, insert the tip of the eccentric pin 305 into the adjustment hole 203.
a into the annular groove 300a of the magnetic pole 300, and then the pin 305 is rotated by a predetermined angle. Then, the magnetic pole 30
0 and the head holder 303 are relatively moved by a minute amount in accordance with the eccentricity of the pin 305, and the gap t is adjusted.

As described above, the magnetic field modulation head 30 is integrally connected to the magneto-optical head 20 via the coupling body 21 and the support arm 22, and is connected to the magneto-optical head 20 relative to the disk D when recording and reproducing information. At the same time, the thread is fed in the same direction and tracking servo is applied. When moving,
The magnetic pole 300 is correctly positioned at the beam convergence position of the laser beam irradiated from the magneto-optical head 20. As such, the two heads 20.30 are aligned.

In the above device configuration, in order to record information on the disc D, the disc D is first placed on a tray (not shown) by closed mode operation and inserted into the corresponding position above the turntable 12 by horizontal loading, and then the disc D is loaded together with the tray. Lowered turntable 12
Move up and be loaded. At this time, the magneto-optical head 20 and the magnetic field modulation head 30 are sent to the outside of the outermost periphery of the disk. The magnetic field modulation head 30 is held at a position where it is separated from the surface of the disk D by the upward movement of the disk clamp arm 32 and lifted up from the surface of the disk D by the urging force of a spring 44, so that it does not interfere with the loading of the disk. .

When the disc D is loaded onto the turntable 12, the clamp motor 34 is driven to rotate normally, and the rotating drum 33
As a result of this rotation, the disk clamp arm 32 is rotated downward. When the clamp arm 32 is rotated to a predetermined position and the disk clamper 13 is brought into pressure contact with the disk D, the light emitted from the photocoupler 450 light emitting element is blocked by the rotation of the rotating drum 33 and the pin 46 provided on its circumferential surface. . By blocking this light, a signal is output from the light receiving element of the photocoupler 45. In response to this signal, a current is applied to the coil 42 of the link means 40, and the attracting force of the magnet 41 attracts the object 43 to be attracted and held. Then,
The magnetic field modulation pad 30 rotates downward around the base end of the support arm 22 as a fulcrum due to the adsorption action of the attracted object 43, and the pad 30
4 and is pressed against the surface of the disk D. At the same time, the magnetic pole 300 is directly opposed to the beam convergence position of the magneto-optical head 20 with a minute gap t between it and the disk surface.

Thereafter, the magneto-optical head 20 and the magnetic field modulation head 30 maintain the same position, and the threads are simultaneously fed in the radial direction of the disk and tracking servo is performed. In this state, the disk medium is continuously irradiated with laser light at a constant intensity through the objective lens of the magneto-optical head 20, and under this continuous irradiation,
A modulated magnetic field corresponding to the recording signal is applied from the magnetic pole 300 of the magnetic field modulating head 30 to the laser beam irradiation position of the medium. With this, the direction of magnetization of the recording track of the disk D is directed to the recording direction, and information is recorded by the magnetic field modulation method.

Note that the diameter of the magnetic pole 300 is 1, considering the tracking operating range (for example, ±0.31) of the magneto-optical head 20.
Although it is set to about 1, it is not necessarily limited to this.

On the other hand, to reproduce the information recorded on the disk D, the return light of the laser beam irradiated from the objective lens 200 of the magneto-optical head 20 reflected by the disk D is guided to the signal detection optical system, where it is detected as a tracking error signal. This is done by detecting a focus error signal and taking the difference between the two error signals. This allows the MO reproduction signal to be detected.

When the open mode is operated to unload the disk D, the disk clamp motor 34 is driven in the opposite direction as described above, and the rotary drum 33 is rotated in the opposite direction to rotate toward the clamp arm 32 . At the same time, the disk clamper 13 separates from and rises from the disk D, and the disk D is unclamped. When the clamp arm 32 rotates upward to a predetermined position, the accompanying rotation of the rotating drum 33 causes the pin 46 provided on its circumferential surface to engage the photocoupler 45.
The light emitted from the light emitting element is again blocked.

Then, by blocking this light, a signal is output from the light receiving element of the photocoupler 45. Upon receiving this signal, the linking means 4
The energization to the fill 42 of No. 0 is canceled. As a result, the attraction force of the magnet 41 disappears, and the attraction and holding of the attraction object 43 is released. Then, the magnetic field modulation head 30
6, the support arm 22 rotates upward about the base end of the support arm 22 as a fulcrum, and is lifted away from the surface of the disk D. It is then held in the raised position. Next, the magnetic field modulation head 30 is sent to the outside of the outermost periphery of the disk together with the magneto-optical head 20 in preparation for loading the next disk.

At approximately the same time as the above-described operation, the tray moves upward and the disk D is transferred from the turntable 12 onto the tray. Then, as the tray moves upward, it is raised to a position directly above the tray. Next, the disk D is ejected to the front of the apparatus along a horizontal path by horizontal movement of the tray.

As described above, when loading and unloading the disk D, the magnetic field modulation head 30 moves upward from the loading position together with the clamp arm 32 and is held at the raised position. In addition, the magneto-optical head 20
At the same time, it is sent to the outermost edge of the disk, so that it does not interfere with the loading and unloading of the disk.

Figure 5 shows the C/
It shows the N characteristic, with the horizontal axis representing the modulation frequency (MHz) and the vertical axis representing the C/N. As is clear from this figure,
Compared to the conventional optical modulation recording method, IMH
High enough C/N to withstand practical use up to frequencies around z
It is clearly seen that this is obtained.

That is, according to the above-described embodiment device, the magnetic pole 300 can be brought very close to the disk medium and maintained at a constant minute gap, and both the high externally generated magnetic field necessary for recording and the high high frequency characteristics of about IMHz can be achieved. The resulting magnetic field modulation recording is achievable.

As described in detail, according to the present invention, the magneto-optical head and the magnetic field modulation head are accurately aligned on the front and back sides that sandwich the disk, and the laser beam irradiation position and the magnetic pole position are accurately aligned. Threads can be fed in unison and servoed. In addition, since the magnetic pole of the magnetic field modulation head can be moved extremely close to the disk medium while maintaining a constant microgap, it is possible to obtain a sufficiently high externally generated magnetic field necessary for recording according to the applied current. , and sufficiently high high frequency characteristics of about IMH2 can be obtained. Therefore, according to the present invention, it is possible to put into practical use a magneto-optical disk device that can be overridden, can shorten the time required to record information, and has high characteristics suitable for high-speed recording.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the overall configuration of a magneto-optical disk device according to the present invention, FIG. 2 is a perspective view of the main part thereof, FIG. 3 is an exploded perspective view of the main part of a magnetic field modulation head, and FIG. FIG. 5 is an enlarged sectional view of the main part of the modulation head, showing C of the device according to the present invention.
FIG. 3 is a characteristic diagram showing the /N characteristic in comparison with the optical modulation method. Dll... magneto-optical disk, 20... magneto-optical head, 30... magnetic field modulation head, 21-- series assembly, 22 fist... support arm, 24... cantilever (lever body), 300-... Lu magnetic pole, t...gap (gap), 304, fist, pad (sliding member). Patent applicant: NEC Home Electro Fig. 4

Claims (4)

[Claims] (1) A magneto-optical head on one side via a magneto-optical disk,
In a disk drive comprising a magnetic field modulation head disposed facing each other on the other side and capable of simultaneously sending the two heads back and forth in the radial direction of the disk, the magneto-optical head is connected on one side of the disk by a coupling body. At the same time, a support arm is rotatably supported on an extension of the coupling body to the other side via the disk, and the magnetic field modulation head is attached to the support arm via an elastically displaceable lever body such as a cantilever. 1. A magneto-optical disk device characterized in that the magnetic pole is supported by a sliding member such as a rubber damper and brought close to the disk surface with a small gap. (2) the support arm is linked to a disc clamp arm that clamps the disc to a turntable;
The magneto-optical disk device according to claim 1, wherein the magnetic field modulation head is rotatably supported so as to approach or separate from the disk by rotation of the clamp arm. . (3) The magnetic field modulation head includes a magnetic pole around which a coil is wound;
It consists of a head holder that holds this magnetic pole at the tip of the lever body, and a pad made of a rubber damper or the like that makes sliding contact with the disk surface is provided at the tip of the head holder, and the magnetic pole and the disk surface are held at a certain gap. 2. A magneto-optical disk device according to claim 1, wherein the magneto-optical disk device is arranged to be adjacent to each other with a gap. (4) An adjustment hole is provided in the head holder, and the gap between the magnetic pole and the disk surface can be adjusted through the adjustment hole. disk device.