JPH06243531A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To provide a magneto-optical disk device without the collision between an air floating magnetic head and a magneto-optical disk, capable of recording a video signal even in a magnetic field modulation system and with high reliability. CONSTITUTION:The high floating air floating magnetic head is adopted as a magnetic head, and a sensor 4 detecting a distance between the air floating magnetic head 33 and the magneto-optical disk 1 is attached to the magnetic head. Then, a loading actuator 9 loading the air floating magnetic head 33 on the magneto-optical disk 1 is driven according to the result of the output of the sensor 4. Further, this device is equipped with a load applying device so as to keep the distance between the air floating magnetic head 33 and the magneto-optical disk 1 to a fixed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk device, and more particularly to a magneto-optical disk device equipped with an external magnetic field applying device necessary for recording or erasing information.

[0002]

2. Description of the Related Art A magneto-optical disk is a kind of perpendicular magnetic medium. When a recording film having magnetic domains oriented in one direction is irradiated with laser light, the coercive force decreases due to a temperature rise and the magnetic field is directed in the direction of an external magnetic field. Therefore, the direction of the magnetic domain is reversed, and the signal is recorded or erased. This is the principle of recording and erasing on the magneto-optical disk.

There are an optical modulation method and a magnetic field modulation method as methods for recording signals on this magneto-optical disk. The optical modulation method is a method of recording and erasing a signal by applying a magnetic field in one direction and modulating a laser beam. In this optical modulation method, the size of the recording pit is determined by the focused spot diameter of the laser light emitted from the semiconductor laser.

On the other hand, the magnetic field modulation method is a method of recording and erasing by continuously irradiating a laser beam and inverting the direction of an applied magnetic field according to a signal. In this magnetic field modulation method, the size of the recording pit depends on the reversal speed of the magnetic field, and therefore it is advantageous for high recording density as compared with the optical modulation method.

As described above, when recording or erasing a signal on the magneto-optical disk, it is necessary to apply a magnetic field from the outside. Conventionally, as a magnetic head for applying this magnetic field, for example, there is a magneto-optical disk device disclosed in Japanese Patent Laid-Open No. 1-177426.

7 and 8 are views for explaining a conventional magneto-optical disk device, FIG. 7 is a perspective view of a main part including a partial cross section of the conventional magneto-optical disk device, and FIG. 8 is an operation explanatory view. Is.

In FIG. 1, reference numeral 1 is a magneto-optical disk, which is housed in a cartridge case 13. Reference numeral 20 denotes an optical head, which converges and irradiates a laser beam emitted from a semiconductor laser (not shown) onto the magneto-optical disk 1 via the objective lens 10. Reference numeral 30 denotes a magnetic head holding a magnetic head coil 30a, which is installed at a position facing the objective lens 10 with the magneto-optical disk 1 interposed therebetween. Two
Reference numeral 9 denotes a magnetic head mounting member that holds the magnetic head 30, and the magnetic head guide shafts 28a, 28b, 28c provided on the magnetic head block 25 and the lead screw 2 are provided.
It is supported by 7.

A position control motor 26 controls the position of the magnetic head 30 by rotating the lead screw 27 and is incorporated in the magnetic head block 25. Reference numeral 21 denotes a magneto-optical head base to which the optical head 20 and the magnetic head block 25 are attached, and the guide shaft 24 and the lead screw 22.
It is movably supported by and. Reference numeral 23 denotes a magneto-optical head base 21 by rotating the lead screw 22.
Is a slide motor for moving the optical head 20 and the magnetic head 30 in the radial direction of the magneto-optical disk 1 (direction of arrow A in FIG. 7).

Next, the operation will be described. After the magneto-optical disk 1 is mounted in the magneto-optical disk device, the magneto-optical disk 1 is clamped by a clamp mechanism (not shown) and is rotationally driven by a disk motor (not shown). Next, the objective lens 10 is opto-magnetic so that the light emitted from a semiconductor laser (not shown) mounted on the optical head 20 is applied to the magneto-optical disk 1 via the objective lens 10 in a just focus state. The movement of the disk 1 is controlled in the focus direction (direction of arrow B in FIG. 7). As a result, information is recorded and reproduced on the magneto-optical disk 1.

At this time, if it is assumed that the objective lens 10 is just focused on the magneto-optical disk 1 while moving upward from the reference position by a distance d ₁ as shown in FIG. If the position of the is fixed is smaller distance between the magnetic head 30 and the magneto-optical disc 1 by d _1, the magneto-optical disk 1 and the magnetic head 30 by the surface vibration of the magneto-optical disc 1 there is a possibility of collision.

On the contrary, assuming that the objective lens 10 is just focused on the magneto-optical disk 1 in a state of moving downward from the reference position by a distance d ₂ as shown in FIG. 8B, the magnetic head 30 is used. Since the distance between the magneto-optical disk 1 and the magneto-optical disk 1 is increased by d ₂ , the magnetic field for recording and erasing information on the magneto-optical disk 1 becomes small.

In such a case, in order to perform optimum recording and erasing, it is necessary to increase the magnetic field applied to the magneto-optical disk 1. As a result, it becomes necessary to increase the drive current of the magnetic head 30, so that the magnetic head 30 cannot be efficiently driven.

Therefore, in order to drive the magnetic head 30 efficiently, it is necessary to adjust the position of the magnetic head 30 with respect to the magneto-optical disk 1. That is, the objective lens 1
0 detects the difference between the position just focused on the magneto-optical disk 1 and the reference position of the objective lens 10, and drives the position control motor 26 supporting the lead screw 27 based on this detection signal. The magnetic head mounting member 29 that supports the magnetic head 30 includes a lead screw 27.
Also, since it is guided by the magnetic head guide shafts 28a, 28b, 28c, the position of the magnetic head 30 with respect to the magneto-optical disk 1 is adjusted up and down (in the direction of arrow C in FIG. 8) by driving the position control motor 26. It becomes possible to do. Thereby, the magnetic head 30 can be efficiently driven.

The conventional magneto-optical disk device is constructed as described above, and the position of the magnetic head 30 with respect to the magneto-optical disk 1 is adjusted by the screw method using the lead screw 27. In such a position adjusting method, there is backlash in the screw portion, it is difficult to adjust the position to several tens of μm, and it is also impossible to perform high-speed position adjustment corresponding to the surface runout speed.

Therefore, it is necessary to make the distance between the magnetic head 30 and the magneto-optical disk 1 large to some extent so as not to collide with each other. For example, in the case of a 130 mm magneto-optical disk, the surface runout standard is ± 0.3 mm or less, so the distance between the magnetic head 30 and the magneto-optical disk 1 needs to be at least 0.4 mm. However,
When the distance between the magneto-optical disk and the magnetic head is 0.1 mm or more, recording of a signal of several MHz, for example, as reported in the technical report of the Institute of Electronics, Information and Communication Engineers, MR87-37, etc. It is difficult to perform the magnetic field modulation method with the current technology. The reason is that if the magnetic field is modulated at several MHz, the magnetic head coil 30
This is because the inductance of a becomes large and a magnetic field sufficient for recording and erasing cannot be applied to the magneto-optical disk 1. Therefore, in the configuration of the conventional magneto-optical disk device, it is difficult to record the video signal if the signal is recorded by the magnetic field modulation method.

As a method for solving such a problem,
For example, OPTRONICS (1990) No. 5 There is a method of mounting an air levitation type magnetic head as reported in literatures such as "Overwrite technology of magneto-optical disk by magnetic field modulation recording method". That is, since it is an air levitation type magnetic head, the distance between the magnetic head and the magneto-optical disk 1 can be reduced to about 10 μm. Therefore, the number of turns of the magnetic head coil that applies a magnetic field to the magneto-optical disk 1 can be reduced, and as a result, the inductance of the magnetic head coil can be reduced. Therefore, even if the magnetic field is modulated at several MHz, the strength of the magnetic field applied to the magneto-optical disk is unlikely to decrease, and the video signal can be recorded and erased.

Conventionally, there are many devices to which such an air levitation type magnetic head is applied in a hard disk device.
There is one disclosed in JP-A-4-60959. Further, as a magnetic head mounted on an air floating type magnetic head, there is a magnetic head disclosed in Japanese Patent Laid-Open No. 4-111203.

FIG. 9, FIG. 10 and FIG. 11 are views for explaining a conventional air-floating magnetic head.
Is a hard disk device equipped with a conventional air levitation type magnetic head. FIG. 10 is a perspective view of a magnetic head mounted on an air levitation type magnetic head, and FIG. 11 is an overall view of the air levitation type magnetic head.

In the figure, 15 is a hard disk, 2
Is a disk motor, and 19 is a magnetic head composed of a magnetic head coil 3a, a magnetic head core 3b, and a magnetic head slider 5. Reference numeral 14 denotes a magnetic head support member that supports the magnetic head 19. The magnetic head support member 14 and the magnetic head 19 serve as an air floating magnetic head 34.
Are configured. The flying height of the air levitation type magnetic head 34 is determined by the balance between the elastic force of the magnetic head support member 14 and the buoyancy exerted on the magnetic head slider 5 by the air flow generated by the rotation of the hard disk 15.

Reference numeral 31 is a loading section for loading the air floating magnetic head 34 onto the hard disk 15, and 32 is a magnetic head loading actuator for driving the loading section 31. Further, 16 is a disk motor 2 for rotating the hard disk 15 at a high speed.
Is a drive circuit for the disk motor 2 for rotating the hard disk 15 at a constant speed, and 18 is a control circuit for the magnetic head loading actuator.

Next, the operation will be described. In the hard disk device, the hard disk 15 is set in the device in advance. And hard disk 1
Air-floating magnetic head 3 for recording and erasing information on 5
Reference numeral 4 indicates a certain distance from the hard disk 15, as indicated by the alternate long and short dash line in FIG. This is hard disk 15 when hard disk 15 starts to rotate.
This is for preventing the magnetic head 19 from colliding with the magnetic head 19.

When the disk motor 2 starts rotating, the control circuit 18 is activated, and the air levitation type magnetic head 34 is loaded on the hard disk 15 by the magnetic head loading actuator 32. At this time, the disk motor 2 is configured to rotate at a higher speed than steady rotation. This is to give sufficient buoyancy to the magnetic head 19 and reduce the possibility of collision between the magnetic head 19 and the hard disk 15. Then, when the air levitation type magnetic head 34 is completely loaded on the hard disk 15, the disk motor 2 is steadily rotated.

As described above, the magnetic head 19 and the hard disk 15 are rotated by increasing the rotation speed of the disk motor 2 only when the air floating magnetic head 34 is loaded.
We have realized a highly reliable device with less possibility of collision between and.

Here, the above-mentioned configuration is a loading method effective for a hard disk device without disk replacement. That is, since it is not necessary to replace the hard disk 15 in the hard disk device, there is no need to worry about the adverse effects of dust or the like on the device.
In addition, since the disk base of the hard disk 15 is glass, the surface wobbling is very small compared with the magneto-optical disk 1. Therefore, in the hard disk device, the distance between the magnetic head 19 and the hard disk 15 during recording and reproduction is about 0.2 to 0.3 μm. Therefore, it is possible to realize a highly reliable device by rotating the disk motor 2 at a high speed only when the air levitation type magnetic head 34 is loaded.

[0025]

On the other hand, in the magneto-optical disk device, since the magneto-optical disk is replaceable, it is necessary to consider dust such as dust, and the surface wobbling of the magneto-optical disk with respect to the hard disk. Therefore, the distance between the air floating magnetic head and the magneto-optical disk is 1
0 μm (50 times more than hard disk drive)
Must be high. In such a case, even if the disk motor is rotated at a high speed only when loading the air levitation type magnetic head, it is possible to obtain a highly reliable device that avoids the influence of the above-mentioned surface wobbling and dust such as dust. I can't.

The present invention has been made to solve the above-mentioned problems, and it is possible to adjust the position of the magnetic head corresponding to the surface wobbling speed of the magneto-optical disk, and at the same time, the magnetic head and the magneto-optical disk. It is an object of the present invention to provide a highly reliable magneto-optical disk device capable of recording a video signal by a magnetic field modulation method which is advantageous for high density recording without collision between the two even if the distance is close.

[0027]

According to a first aspect of the present invention, an air levitation type magnetic head having high levitation is adopted as a magnetic head, and a sensor for detecting a distance between the air levitation type magnetic head and a magneto-optical disk is provided. A mounting actuator for mounting and mounting the air-floating magnetic head on the magneto-optical disk is configured to be driven according to the output result of the sensor.

According to a second aspect of the invention, the loading actuator of the air levitation type magnetic head is used as a load applying device for applying a load to the air levitation type magnetic head according to the output of the sensor. The load applying device may be separately configured.

According to a third aspect of the present invention, the load applied to the air levitation type magnetic head by the magnetic head loading actuator is appropriately varied depending on the position of the air levitation type magnetic head with respect to the magneto-optical disk.

According to a fourth aspect of the invention, a sensor for detecting the distance between the magneto-optical disk and the air floating magnetic head is mounted on the air floating magnetic head.

According to a fifth aspect of the present invention, a distance detecting sensor and a magnetic head coil are arranged on the slider of the air floating magnetic head so as to be on the same line in the radial direction of the magneto-optical disk.

According to a sixth aspect of the invention, a sensor for detecting the distance between the magneto-optical disk and the air floating magnetic head is arranged in the same plane as the slider of the air floating magnetic head.

According to a seventh aspect of the present invention, a sensor for detecting the distance between the magneto-optical disk and the air floating magnetic head is arranged in the groove portion of the slider surface of the air floating magnetic head.

[0034]

According to the first aspect of the present invention, the air levitation type magnetic head is loaded with the sensor for detecting the distance between the air levitation type magnetic head and the magneto-optical disk. can do. Therefore, even if the magneto-optical disk has a large surface wobbling, the air floating magnetic head is less likely to collide with the magneto-optical disk.

According to the second aspect of the present invention, since the sensor for detecting the distance between the air levitation type magnetic head and the magneto-optical disk is provided, the magnetic head loading actuator is driven according to the output of the sensor, and the air levitation type magnetic head is driven. The load applied to the magnetic head can be changed. That is, regardless of the position of the air floating magnetic head on the inner circumference and the outer circumference of the magneto-optical disk, the gap between them can be kept constant.

According to the third aspect of the invention, similarly to the second aspect of the invention, it is possible to maintain a constant gap between the air levitation type magnetic head regardless of whether the position is the inner circumference or the outer circumference of the magneto-optical disk.

According to the fourth aspect of the invention, since the air floating magnetic head is provided with the sensor for detecting the distance from the magneto-optical disk, the sensor can be arranged near the magneto-optical disk. That is, it becomes easy to construct a sensor having high resolution and high reliability.

According to the fifth aspect of the invention, a sensor for detecting the distance between the magneto-optical disk and the air floating magnetic head can be arranged at the same flying height position as the magnetic head coil of the air floating magnetic head. Therefore, the flying height of the air flying type magnetic head can be detected extremely accurately.

According to the sixth aspect of the invention, since the magnetic head slider of the air floating magnetic head and the sensor are in the same plane, the air floating magnetic head can obtain stable buoyancy. Therefore, the distance fluctuation between the air floating magnetic head and the magneto-optical disk is very small, resulting in C / N.
Good recording and erasing can be performed.

According to the invention of claim 7, since the sensor is arranged in the groove portion of the slider surface of the air floating magnetic head, the same effect as that of the invention of claim 6 can be obtained.

[0041]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 to 4 are views for explaining the first embodiment, FIG. 1 is a schematic overall view, FIG. 2 is a partially enlarged view, FIG. 3 is an enlarged perspective view of an air floating magnetic head, and FIG.
Is a loading flowchart.

In the figure, 2 is a disk motor, 6 is a magnetic head composed of a magnetic head coil 3a, a magnetic head core 3b, a sensor 4, and a magnetic head slider 5, and 7 is a magnetic head supporting member for supporting the magnetic head 6. Thus, the magnetic head support member 7 and the magnetic head 6 constitute an air floating magnetic head 33. Reference numeral 8 is a loading section for loading the air floating magnetic head 33 onto the magneto-optical disk 1, and 9 is a magnetic head loading actuator for driving the loading section 8. Reference numeral 10 is an objective lens, 11 is an optical head incorporating the objective lens 10 and provided with a drive mechanism in the radial direction, 12 is a magnetic head support block provided with a drive mechanism that supports the air levitation type magnetic head 33 and drives it in the radial direction. Is.
The same reference numerals as those in the conventional example indicate members that are the same as or correspond to those in the conventional example.

Next, the operation will be described. In the magneto-optical disk device, before the magneto-optical disk 1 is set in the device, the air levitation type magnetic head 33 for applying a magnetic field to the magneto-optical disk 1 has a magneto-optical disk as shown by a dashed line in FIG. It is necessary to take some distance from 1.
This is to prevent the air floating magnetic head 33 from colliding with the cartridge case 13 when setting the magneto-optical disk 1.

When the magneto-optical disk 1 is set in the device, the magneto-optical disk 1 is clamped by the disk motor 2 and the disk motor 2 starts rotating. In the conventional hard disk device, the magnetic head loading actuator 9 is operated after the disk motor 2 reaches the target rotation speed. In the first embodiment, however, the magneto-optical disk 1 is replaced by the disk motor 2. When it is clamped at, the magnetic head loading actuator 9 is operated. Then, when the gap between the magneto-optical disk 1 and the air levitation type magnetic head 33 plunges into a preset range, the magnetic head loading actuator 9 squeezes the magneto-optical disk 1 and the air levitation type magnetic head 33.
The air levitation type magnetic head 33 is loaded according to the output of the sensor 4 which detects the gap between

As described above, in the first embodiment, the air levitation type magnetic head 33 is loaded while detecting the distance between the magneto-optical disk 1 and the air levitation type magnetic head 33. It is possible to obtain a highly reliable magneto-optical disk device even with the magneto-optical disk 1 having a large shake.

Further, since the magnetic head loading actuator can be driven when the magneto-optical disk 1 is clamped by the disk motor 2, the apparatus can be started up at high speed.

In the first embodiment, the sensor 4 for detecting the distance between the magneto-optical disk 1 and the air floating magnetic head 33.
However, the location of the sensor 4 is not limited to this.
It may be installed in the magneto-optical disk device.

Further, in the magneto-optical disk device of the first embodiment, it is possible to keep the gap between the air floating magnetic head 33 and the magneto-optical disk 1 constant. Since the linear velocity during rotation of the magneto-optical disk 1 increases toward the outer circumference, the buoyancy applied to the air levitation type magnetic head 33 also increases toward the outer rim, so that the air levitation type magnetic head 33 and the magneto-optical disk 1 move. The distance increases. Therefore, there is a problem that the drive current for driving the magnetic head coil 3a must be increased.

As a method of solving such a problem, there is a method of driving the magnetic head loading actuator 9 according to the output of the sensor 4 which detects the distance between the air floating magnetic head 33 and the magneto-optical disk 1. That is, the magnetic head loading actuator 9 is driven according to the output of the sensor 4 and the loading unit 8 is moved to variably apply a load to the air levitation type magnetic head 33. Thus, regardless of the position of the air levitation type magnetic head 33 on the inner circumference and the outer circumference of the magneto-optical disk 1, the gap between them can be kept constant, and the magnetic head coil 3a can be efficiently driven. Further, since the distance between the air floating magnetic head 33 and the magneto-optical disk 1 can be kept constant, there is an effect that information with high C / N can be recorded.

Although the method of controlling using the magnetic head loading actuator 9 is shown here, a load applying device (not shown) for applying a load to the air floating magnetic head 33 may be separately provided.

As another method, there is a method of utilizing the property that the linear velocity of the magneto-optical disk 1 increases toward the outer circumference, and the buoyancy applied to the air levitation type magnetic head 33 increases. That is, depending on the position of the air floating magnetic head 33 with respect to the magneto-optical disk 1, the air floating magnetic head 3
The magnetic head loading actuator 9 or the load applying device is set in advance so that the load applied to 3 increases toward the outer circumference and the flying height of the air floating magnetic head 33 becomes constant. Even if such a simple method is used, the same effect as described above can be expected.

The air levitation type magnetic head 33 of the first embodiment will be described in detail with reference to FIG. 3 together with the method for detecting the distance between the air levitation type magnetic head 33 and the magneto-optical disk 1. In the figure, 4 is a light emitting section 4a and a light receiving section 4b.
It is a photo-detection type distance detection sensor constituted by. Three
Reference numeral 5 denotes a sensor holder for holding the sensor 4, which is supported by the magnetic head support member 7 integrally with the magnetic head slider 5.

Next, the operation will be described. The light emitted from the light emitting portion 4a is reflected by the magneto-optical disk 1 and enters the light receiving portion 4b. Then, based on the output result of the light receiving section 4b, the air floating magnetic head 33 and the magneto-optical disk 1
To detect the distance to. In the first embodiment, the distance detecting sensor 4 and the magnetic head coil 3a are arranged on the same line in the radial direction of the magneto-optical disk 1. With such an arrangement, the flying height at the position of the magnetic head coil 3a can be accurately detected.

In the first embodiment, the sensor 4 and the magnetic head slider 5 are constructed as separate parts. In this case, however, the sensor 4 and the magneto-optical disk 1 are separated from each other to some extent, and thus the sensor 4 is used. The optical method is the most effective method.

Example 2. FIG. 5 is a diagram showing an air-floating magnetic head 33 according to a second embodiment, which is an example in which the magnetic head slider 5 and the sensor 4 are integrally configured. As shown in the figure, the magnetic head slider 5 and the sensor 4 are the same. It is placed in the plane. By arranging in this way, even if the magnetic head slider 5 and the sensor 4 are integrally formed, the air flow is smooth, and the air levitation type magnetic head 33 can obtain stable buoyancy. Therefore, the distance variation between the air floating magnetic head 33 and the magneto-optical disk 1 is very small, and as a result, recording and erasing with good C / N can be performed.

Further, in the second embodiment, since the distance between the sensor 4 and the magneto-optical disk 1 becomes small, the sensor 4 system is not limited to the light detection system, but a capacitance detection system, a magnetic field strength detection system or the like. It is also possible to use the method.

Example 3. FIG. 6 is a diagram showing the air-floating magnetic head 33 of the third embodiment, which is an embodiment in which the slider surface of the magnetic head slider 5 has a groove portion. This Example 3
Then, the magneto-optical disk 1 is inserted into the groove of the magnetic head slider 5.
The sensor 4 is arranged to detect the distance between the magnetic head 33 and the air floating magnetic head 33. With this configuration,
The same effect as that of the second embodiment is obtained.

[0058]

According to the first aspect of the present invention, the air levitation type magnetic head is loaded while detecting the distance between the magneto-optical disk and the air levitation type magnetic head. Also in the disk, the air levitation type magnetic head can be loaded without collision between the magneto-optical disk and the air levitation type magnetic head.
Therefore, a highly reliable magneto-optical disk device can be realized, and further, when the magneto-optical disk is clamped by the disk motor, the magnetic head loading actuator can be driven, so that the device can be started up at high speed.

According to the second and third aspects of the present invention, it is possible to record and reproduce a signal while keeping the distance between the magneto-optical disk and the air floating magnetic head constant, so that the magnetic head coil is efficiently driven. Can also,
At the same time, there is an effect that it becomes possible to record / reproduce information having a high C / N.

According to the fourth aspect of the invention, since the air levitation type magnetic head is provided with the sensor for detecting the distance from the magneto-optical disk, it is easy to construct a sensor having high resolution and high reliability. Therefore, it becomes possible to accurately detect the flying height of the air floating magnetic head.

According to the invention of claim 5, there is an effect that the flying height at the position of the magnetic head coil can be accurately detected.

In the inventions of claims 6 and 7, C /
There is an effect that good N can be recorded and erased.
Further, the sensor method is not limited to the light detection method, and it is possible to use a sensor method such as an electrostatic capacitance detection method or a magnetic field strength detection method.

[Brief description of drawings]

FIG. 1 is a schematic overall view showing a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of the first embodiment.

FIG. 3 is a perspective view showing an air floating magnetic head according to a first embodiment.

FIG. 4 is a flow chart of air levitation type magnetic head loading according to the first embodiment.

FIG. 5 is a perspective view showing an air floating magnetic head according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing an air levitation type magnetic head according to a third embodiment of the invention.

FIG. 7 is a perspective view of a main part including a partial cross section showing a conventional magneto-optical disk device.

FIG. 8 is a diagram for explaining the operating principle of a conventional magneto-optical disk device.

FIG. 9 is a schematic configuration diagram showing a hard disk device equipped with a conventional air floating magnetic head.

FIG. 10 is a perspective view of a conventional air floating magnetic head.

FIG. 11 is a perspective view of a conventional air floating magnetic head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk 2 Disk motor 4 Sensor 5 Magnetic head slider 6 Air floating magnetic head 7 Magnetic head support member 8 Loading part 9 Magnetic head loading actuator 11 Optical head 12 Magnetic head support block 33 Air floating magnetic head

Claims (7)

[Claims] 1. A disk, an optical head for recording / reproducing information on / from the disk, a floating magnetic head installed at a position facing the optical head with the disk sandwiched therebetween, and the floating magnetic head is provided with the floating magnetic head. In a magneto-optical disk device including a loading actuator for loading onto a disk, a sensor for detecting a distance between the flying magnetic head and the disk is arranged in the magneto-optical disk device, and a sensor is output according to an output result of the sensor. A magneto-optical disk drive characterized by driving the loading actuator. 2. A disk, an optical head for recording / reproducing information on / from the disk, a floating magnetic head installed at a position facing the optical head with the disk interposed therebetween, and a load for the floating magnetic head. In a magneto-optical disk device including a load applying device for applying a sensor, a sensor for detecting a distance between the floating magnetic head and the disk is arranged in the magneto-optical disk device, and according to an output result of the sensor, A magneto-optical disk device, wherein the load applying device is driven to perform load control so that a distance between the disk and the floating magnetic head is constant. 3. A disk, an optical head for recording / reproducing information on / from the disk, a floating magnetic head installed at a position facing the optical head with the disk interposed therebetween, and a load for the floating magnetic head. In a magneto-optical disk device including a load applying device for applying the load, the load applying device increases the load applied to the floating magnetic head as the position of the floating magnetic head moves toward the outer periphery of the disk, A magneto-optical disk device, wherein load control is performed so that the distance between the disk and the floating magnetic head is constant. 4. A magnetic head for recording information on a disk, a slider to which the magnetic head is attached, a sensor provided on the slider for detecting a distance between the disk and the magnetic head, and a slider for supporting the slider. Flying type magnetic head comprising an elastic supporting member. 5. The flying device according to claim 4, wherein the sensor and the magnetic head are arranged on the slider so as to be on the same line in the radial direction of the disk. Type magnetic head. 6. The flying magnetic head according to claim 4, wherein a surface of the sensor facing the disk is arranged in the same plane as the slider surface. 7. The slider according to claim 4, wherein a groove is formed, and a sensor for detecting a distance between the disk and the magnetic head is installed in the groove. Floating magnetic head.