JPH05101554A - Magneto-optical disk library device - Google Patents

Abstract

PURPOSE:To provide a magnetooptical disk library device which can miniaturize the device and shorten the time for accessing magneto-optical disks housed in the device. CONSTITUTION:A base elevator 22 is capable of moving in the direction of an arrow B and also turning around an elevator shaft 24 as an axis. A floating type magneto-optical head 50 is fixed to the base elevator 22 via a hinge 23 having flexibility. The floating type magnetooptical head 50 is mounted with an optical fiber cable 25 and a magnetic coil for the purpose of transmitting a laser beam from a laser beam source part (omitted in the figure) and emitting it to the magneto-optical disk 11.

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 library device which accommodates a large number of magneto-optical disks and is capable of accessing a desired magneto-optical disk, and particularly to shortening access time and miniaturizing the device. The present invention relates to a magneto-optical disk library device that can be realized.

[0002]

2. Description of the Related Art FIG. 15 is a block diagram showing an example of a conventional magneto-optical disk library device.

The magneto-optical disk library device comprises a stocker 2 for accommodating a disk cartridge 1, a magneto-optical disk drive 3 for carrying out magneto-optical recording and reproduction 3, a disk cartridge 1 for a predetermined stocker 2, a loading tray 4, or a magneto-optical disk drive 3. It is composed of a carriage 5 and the like to be moved to.

When the disc cartridge 1 is inserted from the outside and placed on the loading tray 4, the carriage 5 holds the placed disc cartridge 1 by a mechanism (not shown). The carriage 5 moves in the direction of arrow D, and inserts the disk cartridge 1 into the vacant stocker 2 of the magneto-optical disk drive 3 or the stockers 2 arranged in multiple stages in the direction of arrow D. The carriage 5 is
The stocker 2 is controlled by a control unit (not shown).
A desired one is grasped from the disk cartridge 1 housed in the disk and placed on the loading tray 4 or inserted into the magneto-optical disk drive 3.

FIG. 16 is a sectional view showing the structure of a magneto-optical disk drive of the disk library device shown in FIG.

The disk cartridge 1 inserted into the magneto-optical disk drive 3 by the carriage 5 is set to the loading position by a loading mechanism (not shown), and the access shutter is opened to expose the internal magneto-optical disk 1a. To do.

A fixed magnetic head 7 for applying a magnetic field is arranged opposite to one surface of a magneto-optical disk 1a of a disk cartridge 1 fixed to a spindle shaft 6a of a spindle motor 6, and the other surface thereof is arranged in a radial direction. A movable optical head 8 which is movable to the opposite side is arranged to face.

To record information on the magneto-optical disk 1a, a magnetic field is applied by the fixed magnetic head 7 and
The moving optical head 8 deflects and condenses the laser beam L emitted from the fixed optical head 9 to focus the laser beam L on the recording layer of the magneto-optical disk 1a. Further, in reproducing information, the laser beam L reflected on the recording layer of the magneto-optical disk 1a enters the fixed optical head 9 in a path opposite to that at the time of incidence, and is detected by the fixed optical head 7 as a reproduction signal. Done by.

[0009]

In the magneto-optical disk drive 3 of the magneto-optical disk library device having the above structure, the fixed magnetic head 7 is of a fixed type, and therefore has a constant length in the radial direction of the magneto-optical disk 1a. It is necessary to use one. Further, it is necessary to mount members such as a deflecting prism, an objective lens, and a focus actuator inside the moving optical head 8, which limits the downsizing and weight reduction of the moving optical head 8. Since it is difficult to reduce the weight of the moving optical head 8, it becomes difficult for the magneto-optical disk drive 3 to shorten the access time to the set magneto-optical disk 1a.

Further, in the magneto-optical disk library apparatus, it is difficult to miniaturize the magneto-optical disk drive 3 and it is necessary to secure a space for moving the disk cartridge 1 in the apparatus. Becomes larger. Since it is difficult to shorten the access time of the magneto-optical disk drive 3 and it is difficult to increase the moving speed of the carriage 5 that moves the disk cartridge 1, the desired disk cartridge 1 stored in the stocker 2 is stored. Access time to.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magneto-optical disk library device which can reduce the size of the device and shorten the access time to the contained magneto-optical disk in order to solve the above problems.

[0012]

In order to solve the above-mentioned problems, the present invention stores a plurality of magneto-optical disks inside,
In a magneto-optical disk library apparatus for recording / reproducing on / from a desired magneto-optical disk, an optical fiber cable for transmitting and emitting a light beam and a magnetic coil for applying a magnetic field are mounted, and a lift force generated by an air flow causes A magneto-optical head that floats above the magneto-optical disk and an elevator that moves the magneto-optical head to a position where recording and reproduction can be performed with respect to a desired magneto-optical disk are provided.

In addition, in a magneto-optical disk library device in which a plurality of magneto-optical disks are housed and recording / reproduction is performed on a desired magneto-optical disk, an optical fiber cable for transmitting and emitting a light beam and a magnetic field are applied. And a magneto-optical head mounted on the magneto-optical disk so as to face the magneto-optical disk by a lift generated by an air flow.

Further, the optical fiber cable mounted on the magneto-optical head comprises a single mode fiber for keeping the phase of the light beam constant, and an objective lens or a refractive index distribution type for condensing the light beam. The lens is arranged in the magneto-optical head.

Further, the optical fiber cable mounted on the magneto-optical head is a refractive index distribution type optical fiber cable for condensing the emitted light beam.

Further, a pair of magneto-optical heads are opposed to both surfaces of the magneto-optical disk during recording so that the magneto-optical head can emit a light beam or apply a magnetic field to both surfaces of the magneto-optical disk. It is characterized in that it is configured.

[0017]

According to the above-mentioned means, the floating magneto-optical head equipped with the optical fiber cable and the magnetic coil and the elevator for moving the magneto-optical head are used for the magneto-optical head which is a movable part such as an actuator. Since it is not necessary to mount a member, it is possible to reduce the size and weight, and by moving the small magneto-optical head, it becomes possible to access a desired magneto-optical disk.

Further, since the magneto-optical head is arranged so as to face each magneto-optical disk housed therein, it becomes unnecessary to move the magneto-optical head.

Further, since the optical fiber cable is composed of a single mode fiber and the objective lens or the gradient index lens is arranged in the magneto-optical head, a light beam having a constant phase can be obtained and the light beam Can be condensed.

Further, since the optical fiber cable is a graded index optical fiber cable, the emitted light beam can be condensed.

Further, by constructing the pair of magneto-optical heads so as to face both surfaces of the magneto-optical disk during recording, a light beam can be emitted or a magnetic field can be applied to both surfaces of the magneto-optical disk.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the outline of the first embodiment of the present invention.

The magneto-optical disk library device 20 is fixed to a spindle shaft 21 and rotates a predetermined number of magneto-optical disks 11 and base elevators 22 in the direction of arrow A.
It comprises a pair of levitation type magnetic heads 50 fixed to each other via a hinge 23, an elevator shaft 24 for guiding the movement of the base elevator 22, and the like.

The base elevator 22 moves in the direction of arrow B by a structure not shown, moves to the side of the magneto-optical disk 11 designated by a signal from the outside, and rotates about the elevator shaft 24. Then, a pair of floating magneto-optical heads 50 are opposed to both sides of the magneto-optical disk 11.

FIG. 2 is a side view of the base elevator and the floating magneto-optical head of this embodiment, and FIG. 3 is a plan view thereof.

The levitation type magneto-optical head 50 is moved in the direction of arrow C2 on the surface of the opto-magnetic disc 11 facing the base elevator 22 when the base elevator 22 rotates about the elevator shaft 24 in the direction C1. .. Further, the magneto-optical disk 11 is rotated in the direction of arrow A, and the floating magneto-optical head 50 is moved in the direction C2, so that it can move on a predetermined information track.

The hinge 23 for supporting the floating magneto-optical head 50 is composed of a flexible leaf spring or the like,
Each floating magneto-optical head 50 is biased toward the magneto-optical disk 11. An optical fiber cable 25 for transmitting a laser beam from a laser light source (not shown) to the floating magneto-optical head is arranged on the hinge 23.

FIG. 4 is a side sectional view showing an example of the floating magneto-optical head, and FIG. 5 is a bottom view thereof.

The levitation type magneto-optical head 50 has a slider surface 51 for generating a lift force by an air flow in an arrow A direction, a ring-shaped magnetic coil 52 arranged on the slider surface 51, and a hollow portion of the magnetic coil 52. And an optical fiber cable 25 embedded in the through hole formed as.

The floating magneto-optical head 50 is a magneto-optical disk.
The lift force of the slider surface 51 and the urging force of the hinge 23 are balanced during the rotation of 11, so that the floating state is maintained for a certain distance from the magneto-optical disk 11. When recording in this state, information is recorded on the magneto-optical disk 11 by emitting a laser beam L from the tip of the optical fiber cable 25 to the recording layer 11a and applying a magnetic field by the magnetic coil 52. Here, the magnetic coil 52 is configured to be capable of magnetic field modulation. Since the floating magneto-optical head 50 is provided, it is possible to perform overwrite by simultaneously erasing and recording information. Information reproduction is performed by transmitting the laser beam L reflected by the recording layer 11a to a reproduction signal detecting section (not shown) by the optical fiber cable 25, and detecting the transmitted laser beam as a reproduction signal.

According to the first embodiment of the present invention described above, the floating magneto-optical head 50 formed integrally with the magnetic coil 52 is
Since it is not necessary to mount an actuator or the like on the head itself for focusing or tracking, the size and weight can be reduced. By reducing the size and weight of the floating magneto-optical head 50, it becomes possible to easily move the magneto-optical disk 11 in the radial direction and the vertical direction by the base elevator 22. Can be shortened. Further, since the magneto-optical disk 11 is accessed by moving the small floating magneto-optical head 50, it is not necessary to move the magneto-optical disk 11 to a magneto-optical disk drive which is a recording / reproducing device. Therefore, the space for moving the device can be small, and the device can be downsized. Further, since the floating magneto-optical head 50 is arranged so as to face both sides of the magneto-optical disk 11, it is possible to cope with a magneto-optical disk capable of recording and reproducing on both sides without inverting the disk.

FIG. 6 is a block diagram showing the outline of the second embodiment of the present invention.

In FIG. 6, members corresponding to the members described with reference to FIGS. 1 to 5 are designated by the same reference numerals and the description thereof will be omitted.

A pair of levitation type magneto-optical heads 50 are arranged opposite to both surfaces of all the magneto-optical disks 11 fixed to the spindle shaft 21. Levitation type magneto-optical head 50
Is fixed to a base 26 via a hinge 23, and the base 26 is rotatable about a shaft 27.

A control unit (not shown) controls so as to selectively perform recording and reproduction on a desired magneto-optical disk 11.

According to the second embodiment of the present invention described above, the first
Since it is not necessary to move the floating magneto-optical head 50 between the magneto-optical disks 11 as compared with the embodiment, the access time can be further shortened.

7 to 14 are side sectional views showing other examples of the floating magneto-optical head according to each embodiment of the present invention.

In FIGS. 7 to 14, members corresponding to the members described with reference to FIGS. 4 and 5 are designated by the same reference numerals and the description thereof will be omitted.

In the floating magneto-optical head 50 of FIG. 7, the optical fiber cable 25a is composed of a single mode fiber, and the objective lens 53 is arranged in the hollow portion of the magnetic coil 52.

By constructing the optical fiber cable 25a from a single mode fiber, the phase of the emitted laser beam L becomes constant, and the laser beam L having the constant phase is condensed by the objective lens 53, thereby recording. Since the diameter of the laser beam L on the layer 11a is small, it is possible to improve the recording density.

In the levitation type magneto-optical head 50 of FIG. 8, the optical fiber cable 25a is composed of a single mode fiber, and the refractive index distribution type lens is provided in the hollow portion of the magnetic coil 52.
54 are arranged.

Similarly, when the objective lens is used, the laser beam L can be focused by the gradient index lens 54,
Further, since the gradient index lens 54 has a cylindrical shape, it can be easily assembled.

The levitation type magneto-optical head 50 of FIG. 9 is provided with an optical fiber cable 25b which gradually shrinks as the diameter of the emission cross section of the tip approaches the emission end face.

Since the diameter of the emitted laser beam L can be reduced by the optical fiber cable 25b having a narrowed emission cross section at the tip, the recording density can be improved.

In the floating magneto-optical head 50 shown in FIG. 10, a gradient index optical fiber cable 25c having a refractive index increasing from the center to the outer periphery is arranged on the emission surface of the laser beam L.

With the gradient index optical fiber cable 25c, the laser beam L can be focused without disposing an objective lens or the like, and the recording density can be improved.

In the floating magneto-optical head 50 of FIG. 11, a multi-core optical fiber cable 25d obtained by bundling a plurality of optical fiber cables into one and an objective lens 53 are arranged. The optical fiber cable of the multi-core optical fiber cable 25d is composed of a single mode fiber.

With the multi-core optical fiber cable 25d, it is possible to increase the amount of light and to increase the signal strength as compared with transmitting a laser beam with a single optical fiber cable.

In the floating magneto-optical head 50 of FIG. 12, a plurality of gradient index optical fiber cables 25c are arranged,
Each of the gradient index optical fiber cables 25c is configured to be capable of emitting a laser beam L focused independently. Each refractive index distribution type optical fiber cable 25c,
The emitted laser beams L are arranged so as to be emitted on different information tracks or emitted on the same information track.

A plurality of gradient index optical fiber cables 25
When c emits the laser beam L on different information tracks, it becomes possible to simultaneously record and reproduce on a plurality of information tracks, and emit a plurality of laser beams L on the same information track. In this case, it is possible to carry out overwrite and replay simultaneously.

In the floating magneto-optical head 50 shown in FIG.
An optical fiber cable 25 is arranged parallel to the surface of the magneto-optical disk 11. Further, the floating magneto-optical head 50 includes a deflection mirror 55 for deflecting the laser beam L emitted from the optical fiber cable 25 in the direction normal to the surface of the magneto-optical disk 11, and an objective for converging the deflected laser beam L. A lens 53 and is arranged.

Connect the optical fiber cable 25 to the magneto-optical disk.
By arranging it in parallel with 11, the optical fiber cable 25 can be easily routed because it is not necessary to bend it.

In the floating magneto-optical head 50 shown in FIG.
An optical fiber cable 25 is arranged in parallel with the surface of the magneto-optical disk 11, and a concave mirror 56 for deflecting and condensing the emitted laser beam L is arranged.

According to the concave mirror 56, since the deflection and the focusing can be performed at the same time, the objective lens is not required, and the weight of the floating magneto-optical head 50 can be reduced as compared with the one shown in FIG.

[0056]

As described above, according to the present invention, the floating magneto-optical head and the elevator of the magneto-optical head can reduce the size and weight of the magneto-optical head, which is the movable portion, so that the access time can be shortened. Moreover, since the magneto-optical head is moved to access the desired magneto-optical disk, the space for movement is smaller than that of moving the magneto-optical disk, and the device can be downsized, and the magneto-optical head faces each magneto-optical disk. By arranging it, it is not necessary to move the magneto-optical head and access time can be reduced. Furthermore, the optical fiber cable is composed of a single mode fiber, and the objective lens or the gradient index lens is arranged in the magneto-optical head. Or the optical fiber cable is a gradient index optical fiber cable to collect the light beam. Therefore, the recording density can be improved, and a pair of magneto-optical heads can be opposed to both sides of the magneto-optical disk at the time of recording so that both sides can be accessed without inverting the magneto-optical disk. A library device can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of a first embodiment of the present invention.

FIG. 2 is a side view of the base elevator and the floating magneto-optical head according to the first embodiment.

FIG. 3 is a plan view of the base elevator and the floating magneto-optical head of the first embodiment.

FIG. 4 is a side sectional view showing an example of a floating magnetic head.

FIG. 5 is a bottom view showing an example of a floating magneto-optical head.

FIG. 6 is a configuration diagram showing an outline of a second embodiment of the present invention.

[Figure 7] ~

FIG. 14 is a side sectional view showing another example of the floating magneto-optical head according to the first embodiment or the second embodiment of the present invention.

FIG. 15 is a block diagram showing an example of a conventional magneto-optical disk library device.

FIG. 16 is a sectional view showing a configuration of a magneto-optical disk drive of a conventional magneto-optical disk library device.

[Explanation of symbols]

11 ... Magneto-optical disk, 22 ... Base elevator, 23 ...
Hinge, 24 ... Elevator shaft, 25, 25a, 25b ...
Optical fiber cable, 25c ... Gradient index type optical fiber cable, 25d ... Multi-core optical fiber cable, 26 ... Base, 27 ... Shaft, 50 ... Floating type magneto-optical head,
51 ... Slider surface, 52 ... Magnetic coil, 53 ... Objective lens, 54 ... Gradient index lens.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 26, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Patent application title: Magneto-optical disk drive device and magneto-optical disk library device

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a magneto-optical disk.
Related to a magneto-optical disk drive device for recording and reproducing by
The present invention relates to an optical disk drive device capable of downsizing the device, or a magneto-optical disk library device capable of accommodating a large number of magneto-optical disks and accessing a desired magneto-optical disk, and particularly to shortening the access time and the device. The present invention relates to a magneto-optical disk library device that can be downsized.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

In order to solve the above problems, the present invention provides a magneto-optical disk for recording / reproducing on / from a magneto-optical disk.
Disc drive device transmits and emits a light beam
Fiber optic cable for
It is equipped with an air coil and is moved forward by the lift generated by the air flow.
Equipped with a magneto-optical head that floats above the magneto-optical disk
In addition, the optical fiber cable mounted on the magneto-optical head
Cable to keep the phase of the light beam constant.
It consists of a fiber optic and collects the light beam.
Objective lens or gradient index lens for magneto-optical head
It is characterized by being placed in. Also, for magneto-optical discs
In a magneto-optical disk drive device for recording and reproducing,
Fiber optic cables and magnets for transmitting and exiting the beam
It is equipped with a magnetic coil for applying a field,
Levitated against the magneto-optical disk by the lift force generated
Equipped with a magneto-optical head
The optical beam emitted from the optical fiber cable
To use a graded index optical fiber cable
Is characterized by. Further, by the magneto-optical head,
It emits a light beam to both sides of the magneto-optical disk or
A pair of magneto-optical heads can be used for recording so that a field can be applied.
It is configured to face both sides of the magneto-optical disk
Is characterized by. Further, in a magneto-optical disk library device which accommodates a plurality of magneto-optical disks and records / reproduces information on / from a desired magneto-optical disk, an optical fiber cable for transmitting and emitting a light beam and a magnetic coil for applying a magnetic field. And a magneto-optical head that floats above the magneto-optical disk by a lift generated by an air flow, and an elevator that moves the magneto-optical head to a position where recording and reproduction can be performed with respect to a desired magneto-optical disk. It is characterized by having.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017]

According to the above means, the optical disk drive device
, A fiber composed of single-mode fiber
IVA cable and objective lens or gradient index lens
With a floating magneto-optical head equipped with
A member such as an actuator is mounted on a certain magneto-optical head.
It is possible to reduce the size and weight because there is no need to
A constant light beam is obtained and the light beam is focused
It becomes possible. In addition, the optical disk drive device
And levitation type with gradient index optical fiber cable
The magneto-optical head of
Need to be equipped with actuators, objective lenses, etc.
Since there is no light, it is possible to reduce the size and weight of the light beam.
It is possible to collect light. In addition, a pair of magneto-optical
The head against both sides of the magneto-optical disk during recording.
With this configuration, both sides of the magneto-optical disk
To emit a light beam or apply a magnetic field. Alternatively, in the optical disk library device, a member such as an actuator is mounted on the magneto-optical head which is a movable part by a floating magneto-optical head equipped with an optical fiber cable and a magnetic coil and an elevator for moving the magneto-optical head. Since it is not necessary, the size and weight can be reduced, and the desired magneto-optical disk can be accessed by moving the small magneto-optical head.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction content]

[0024] The magneto-optical disk library device 20, instrumentation
From among the plurality of magneto-optical disks 11 arranged inside the storage
Magneto-optical disc that can record / reproduce to / from desired items
A live device, which is a fixed number of magneto-optical disks 11 fixed to a spindle shaft 21 and rotated in the direction of arrow A, and a pair of floating magnetic heads 50 fixed to a base elevator 22 via a hinge 23, Elevator shaft 2 for guiding the movement of the base elevator 22
It is composed of 4 etc.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0035

[Correction method] Change

[Correction content]

The magneto-optical disk library device 30 is a device
From among the plurality of magneto-optical disks 11 arranged inside the storage
Magneto-optical disc that can record / reproduce to / from desired items
This is a live device, and a pair of levitation type magneto-optical heads 50 are arranged opposite to both surfaces of all magneto-optical disks 11 fixed to the spindle shaft 21. The floating magneto-optical head 50 is fixed to a base 26 via a hinge 23, and the base 26 is rotatable about a shaft 27.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

According to the second embodiment of the present invention described above, the first
Since it is not necessary to move the floating magneto-optical head 50 between the magneto-optical disks 11 as compared with the embodiment, the access time can be further shortened. In addition, multiple magneto-optical disks
It is possible to record continuously on both sides of
One of the descriptions of the magneto-optical disk 11 with a small remaining area
Recording on the recording surface, recording is completed on all areas
The remaining information can be recorded continuously on other recording surfaces.
Wear. Furthermore, a plurality of floating magneto-optical heads 50 are independently
Drive the plurality of magneto-optical disks 11
Since information can be recorded simultaneously on the recording surface,
The effective transfer rate of can be improved.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction content]

[0043] Using the objective lens can be focused Les Zabimu L refractive index lens 54 as well, since more gradient index lens 54 is cylindrical, assembled easily.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

A plurality of gradient index optical fiber cables 2
When 5c emits the laser beams L on different information tracks, it becomes possible to record / reproduce on a plurality of information tracks at the same time, and emit a plurality of laser beams L on the same information track. In case the erase
1-pass write (light modulation recording
1), or one pass of overwrite and verify
(At the time of magnetic field modulation recording).

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction content]

[0056]

As described above, the magneto-optical device of the present invention has been described.
According to the disk drive device, the floating magneto-optical head is used.
Therefore, it is possible to reduce the size and weight of the magneto-optical head, which is a movable part.
Therefore, it is possible to move the magneto-optical disk at high speed.
Access time can be shortened, and the optical fiber cable
The cable consists of a single mode fiber and
Objective lens or gradient index lens on the magnetic head
Either place the fiber-optic cable
A fiber cable is used to collect the light beam.
The recording density can be improved and
Pair magneto-optical heads on both sides of the magneto-optical disk during recording
Inverting the magneto-optical disk by making them face each other
Access to both sides without. Alternatively, according to the magneto-optical disk library apparatus of the present invention, the floating magneto-optical head and the elevator of the magneto-optical head can reduce the size and weight of the magneto-optical head that is the movable portion, so that the access time can be shortened and the magneto-optical disk can be shortened. Since the head is moved to access the desired magneto-optical disk, the space for movement is smaller than that of moving the magneto-optical disk, and the size of the device can be reduced, and the magneto-optical heads are arranged to face each magneto-optical disk. By this, it is not necessary to move the magneto-optical head, access time can be reduced, and further, the optical fiber cable is composed of a single mode fiber, and the objective lens or the gradient index lens is arranged in the magneto-optical head. Alternatively, by changing the optical fiber cable to a graded index optical fiber cable, Since the light can be emitted, the recording density can be improved. Further, by facing a pair of magneto-optical heads on both sides of the magneto-optical disk during recording, both sides can be accessed without inverting the magneto-optical disk. Since recording can be continuously performed on a plurality of magneto-optical disks, the recording capacity of the magneto-optical disk can be used to the maximum extent. Further, according to the present invention, the use of the optical fiber makes it possible to easily configure a dustproof structure for the optical component in the apparatus, and therefore dust or the like adheres to the optical component to deteriorate the optical signal, which results in recording / reproducing. It is possible to prevent the occurrence of errors, and it is possible to record by placing the magnetic coil close to the magneto-optical disk by the floating magneto-optical head.
Therefore, a stable and strong magnetic field can be applied to the magneto-optical disk.
Therefore, for example, magnetic field modulation recording can be performed and effective transfer can be performed.
The feed rate can be improved and the weight of the movable member is reduced to save
Since it can be converted to electric power, the temperature rise inside the device is suppressed.
Therefore, the operating environment temperature can be raised.

Claims (5)

[Claims] 1. A plurality of magneto-optical disks are housed inside,
In a magneto-optical disk library apparatus for recording / reproducing on / from a desired magneto-optical disk, an optical fiber cable for transmitting and emitting a light beam and a magnetic coil for applying a magnetic field are mounted, and a lift force generated by an air flow causes A magneto-optical disk library apparatus comprising: a magneto-optical head that floats above the magneto-optical disk; and an elevator that moves the magneto-optical head to a position where recording and reproduction can be performed with respect to a desired magneto-optical disk. 2. A plurality of magneto-optical disks are housed inside,
In a magneto-optical disk library device for recording / reproducing on / from a desired magneto-optical disk, an optical fiber cable for transmitting and emitting a light beam and a magnetic coil for applying a magnetic field are mounted, and arranged to face each magneto-optical disk. A magneto-optical disk library device, comprising: a magneto-optical head that floats above the magneto-optical disk by the lift force generated by the air flow. 3. An optical fiber cable mounted on the magneto-optical head comprises a single mode fiber for keeping the phase of the light beam constant, and an objective lens or a refractive index distribution type for condensing the light beam. The lens is arranged in the magneto-optical head, and the lens is arranged in the magneto-optical head.
Magneto-optical disk library device. 4. The optical fiber cable according to claim 1, wherein the optical fiber cable mounted on the magneto-optical head is a graded index optical fiber cable for condensing an emitted light beam. Magnetic disk library device. 5. A pair of magneto-optical heads are opposed to both sides of the magneto-optical disk during recording so that the magneto-optical head can emit a light beam or apply a magnetic field to both sides of the magneto-optical disk. The magneto-optical disk library device according to any one of claims 1 to 4, which is configured.