JPH08203090A - Loading method of floating type optical head and optical disk device - Google Patents

Abstract

PURPOSE: To provide a floating type optical head loading method and an optical disk device capable of preventing damage to an optical medium, etc., and high- speed accessing without damaging the optical medium or the floating type optical head. CONSTITUTION: The floating type optical head 207 is disposed away from an optical medium 200 beforehand, the floating type optical head 207 is gradually brought close to the optical medium 200 and thereby the floating type optical head 207 is floated on the optical medium 200. Further, during loading thereof, a light emitting element 11 placed in the floating type optical head 207 is switched off or made smaller than a prescribed value. Also, during loading thereof, by controlling currents supplied to first and second coils 51 and 52, a focusing means is fixed in a specified state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for loading a floating optical head used as a storage device for a computer or the like and an optical disk device.

[0002]

2. Description of the Related Art Information recording / reproducing devices include magnetic recording / reproducing devices and optical recording / reproducing devices. Some of the magnetic recording / reproducing devices magnetically record / reproduce information on / from a magnetic recording medium by a magnetic head, and a magnetic disk drive device is a typical device. Some optical recording / reproducing devices optically reproduce or record information with a laser beam, and a read-only compact disc drive (CD-ROM), magneto-optical disc drive device, phase change device, etc. It can be classified into an optical disk drive device and the like.

An information recording / reproducing apparatus as an external storage device of a computer has conventionally been required to improve the recording density per unit volume (hereinafter referred to as the device density) and increase the access speed required for recording / reproducing information. Has been done.

Further, the unit cost per unit of required storage capacity (hereinafter referred to as bit cost) is decreasing year by year, and there is a demand for providing a cheaper information recording / reproducing apparatus.

A conventional optical recording / reproducing apparatus is a magnetic recording / reproducing apparatus in which a small magnetic head floats over the surface of a magnetic recording medium with a substantially constant gap, and recording / reproducing is performed while moving only the magnetic head and its supporting member. However, since the objective lens, the focus control means, the tracking control means, and the like having a relatively large weight had to be moved, the access speed was slow.

Regarding the areal recording density of the recording medium,
Although it is still superior to the magnetic recording / reproducing apparatus at the present moment, there is a magnetic recording / reproducing apparatus in which a magnetic head is minute and a plurality of magnetic recording media are stacked in the apparatus. This magnetic recording / reproducing device has a storage capacity per device (hereinafter referred to as device recording density) that exceeds that of the optical recording / reproducing device. Furthermore, in the magnetic recording / reproducing apparatus,
A magnetic recording medium having a diameter of up to about 1.8 inches has been put into practical use, and the device thickness has been reduced to about 10 mm. As a result, it is widely used in notebook type portable personal computers (hereinafter referred to as personal computers) and the like.

On the other hand, in the optical recording / reproducing apparatus, a large number of optical parts are required to guide the light from the semiconductor laser to the optical medium, to make it reach the optical medium, and to guide the reproduced light to the sensor for detection, which makes it difficult to miniaturize. It was

There is also a problem that the apparatus price is high for a magnetic recording / reproducing apparatus having a simple structure. These results,
A magnetic recording / reproducing device is widely used as an external storage device for a computer, and an optical recording / reproducing device is a CD-R.
At present, except for applications such as OM, it is used only for limited purposes such as storing document files.

In order to overcome such a situation, the optical information recording / reproducing apparatus must increase the access speed, improve the device density and reduce the device cost.

Generally, in order to increase the device density in an optical recording / reproducing device, the numerical aperture (NA) of the objective lens is increased.

Shortening the wavelength of the semiconductor laser.・ Integrate semiconductor lasers, sensors, and optical components.

The number of recording media is increased to form a stack structure. Things can be considered. To increase the access speed: -Reduce the mass of the optical head.

Increase the thrust of the actuator. However, if the thrust of the actuator is increased, the device becomes large and the device density cannot be increased.

Therefore, it is desirable to reduce the size of the optical head, shorten the wavelength of the semiconductor laser, and increase the numerical aperture (NA) of the objective lens.

By the way, a wavelength of 780 nm has been conventionally used as a semiconductor laser, and at present, a wavelength of 6 nm is used.
Short wavelength semiconductor lasers of about 80 nm have also become practical. However, in the conventional configuration, a working distance of about 1.5 mm to 2 mm is required between the objective lens and the optical medium in order to avoid contact between them.

Therefore, even if the numerical aperture (NA) of the objective lens is increased, the focal length cannot be reduced, and the diameter of the required light beam increases in proportion to the numerical aperture. Was inevitably increased, and the device recording density could not be increased.

In order to solve the above-mentioned problems, a floating type optical head, such as a magnetic head used in a magnetic recording / reproducing apparatus, is used in which the optical head is levitated on an optical medium by using a flying slider. A mounted optical disk device has been proposed.

[0018]

However, in the above-mentioned conventional structure, when the optical head is levitated on the optical medium, C
In the SS (contact start stop) system, the optical head and the optical medium are rubbed against each other, which may damage the optical head or the optical medium.

The present invention solves the above-mentioned problems of the prior art. The optical medium, the floating optical head, etc. are not scratched, and the optical medium and other members can be less damaged by unnecessary light. An object of the present invention is to provide a loading method of a floating optical head and an optical disk device capable of performing focusing immediately after loading.

[0020]

In order to achieve this object, a floating optical head placed away from the optical medium and a rotating optical medium are brought close to each other, and the floating optical head is placed on the optical medium. It was made to surface.

During loading, the light source of the floating optical head is turned off, or the amount of light emitted from the light source is set to a predetermined value or less.

Further, the focusing means of the floating optical head was fixed at a predetermined position during loading.

[0023]

With this configuration, the floating optical head and the optical medium do not rub against each other during loading.

Further, unnecessary light emitted from the floating type optical head is not applied to the optical medium or members inside the apparatus.

Further, focusing can be performed immediately after the loading is completed.

[0026]

【Example】

(Embodiment 1) FIG. 1 is a perspective view showing an optical disk device according to an embodiment of the present invention. In FIG. 1, 200 are optical media, and the optical media 200 are fixed to the same rotating shaft 201. In this embodiment, the optical medium 20
Although 0 is set to two, it may be one or three or more. The rotating shaft 201 is connected to a driving means such as a spindle motor (not shown). Reference numeral 202 denotes an arm. The arm 202 rotates about a rotation shaft 203, and mounting portions 204, 2 are provided at the end of the arm 202 on the optical medium 200 side.
05 and 220 are projected, and each mounting portion 20
4, 205 and 220 have suspensions 206, respectively.
Is provided. A voice coil motor 208 for rotating the arm 202 is provided at an end of the rotating shaft 203 of the arm 202 opposite to the optical medium 200 side. The voice coil motor 208 includes a coil 209 provided at an end of the arm 202, a magnet 210 provided so as to face the coil 209, and a yoke 21 forming a magnetic path.
It is composed of 1. Further, a floating optical head 207 is attached to the tip of the suspension 206. At this time, the floating optical head 207 is mounted on the suspension 20.
6 may be directly joined, or may be joined via a gimbal or the like (not shown). At this time, if the floating optical head 207 is attached to the suspension 206 via the gimbal, the floating optical head 207 can easily follow the movement of the optical medium 200.
It is possible to avoid contact with 00 as much as possible. In addition, the floating optical head 207 is directly attached to the suspension 206.
In the case of joining to, there is an advantage that the number of parts can be reduced.

A substrate 212 is provided with a drive means such as a spindle motor (not shown), a circuit such as a controller (not shown), a voice coil motor 208, etc., which is not shown. Are attached to the substrate 212 by the joint 213. The levitation type optical head 207 is composed of a levitation slider and an optical element having at least a light source and a means for condensing light from the light source and a light receiving means. The optical element is movable with respect to the levitation slider. It is installed. Further, it has a means for finely moving at least one of the optical element and the flying slider, and is configured to perform at least one of tracking and focusing by the fine movement.

Reference numerals 301, 302, and 303 are load bars having an inclined surface at their tips, respectively.
2, 303 may be fixed to the outside of the device, or the substrate 212
You may fix it to.

Next, the load bars 301, 302, 303
A loading method and an unloading method using will be described with reference to FIGS.

First, the loading method will be described. First, as shown in FIG. 2, before loading (optical medium 2
00 is rotating) and suspension 206 is load bar 3
It is in a state of getting on 01. Next, when a current flows through the coil 209 due to a start signal or the like, the arm 2
Reference numeral 02 rotates about the rotary shaft 203, and the attachment portion 204 moves in the direction of arrow A shown in FIG. Then, the suspension 206 slides on the flat portion 301a of the load bar 301 and moves toward the inclined surface 301b, and the floating optical head 207 approaches the outer peripheral end of the optical medium 200 (FIG. 3).

Further, since the suspension 206 is configured to exert a pressing force toward the optical medium 200 when the mounting portion 204 moves in the direction of arrow A, the suspension 206 moves from the flat portion 301a to the inclined surface 301b and the floating optical head. 207 further approaches the outer peripheral edge of the optical medium 200, and the air bearing surface of the floating optical head 207 approaches the recording surface of the optical medium 200 (FIG. 4).

When the mounting portion 204 further moves in the direction of arrow A, the suspension 206 separates from the inclined surface 301b and the floating optical head 207 is loaded on the optical medium 200 (FIG. 5). At this time, the loaded floating optical head 207 is in a state of floating with a predetermined gap due to the airflow formed on the surface of the optical medium 200 (FIG. 5).

After that, the floating optical head 207 is moved to the rotary shaft 2
It is rotated about 03 and is positioned on a predetermined track on the optical medium 200.

Next, the unloading method will be described. When at least one of the predetermined recording operation and reproducing operation is completed, the mounting portion 204 moves in the direction opposite to the arrow A direction shown in FIG. 2, and the floating optical head 207 that has levitated on the optical medium 200 accordingly. It moves to the outer peripheral edge of the optical medium 200 (FIG. 5).

When the mounting portion 204 is further moved in the direction opposite to the arrow A direction, the suspension 206 moves to the inclined surface 30.
1b, the floating optical head 207 moves to the optical medium 20.
The distance from the 0 recording surface is further increased, and the distance is further from the outer peripheral edge of the optical medium 200 (FIG. 4).

When the mounting portion 204 is further moved in the direction opposite to the arrow A direction, the suspension 206 moves to the inclined surface 30.
The process moves from 1b to the flat part 301a, and the unloading is completed.

The loading and unloading of the other floating optical heads are the same as those described above, and hence the description thereof is omitted.

As described above, in the present embodiment, when the levitation type optical head 207 is levitated on the optical medium 200, the levitation type optical head 207 and the optical medium 200 are separated in advance, and the levitation type optical head 207 is gradually moved. By loading so as to approach the optical medium 200, it is possible to prevent contact between the floating optical head 207 and the optical medium 200, and it is possible to suppress scratches or the like on the floating optical head 207 as much as possible. Furthermore, in addition to this configuration, by using a swing arm system in which the floating optical head 207 is moved around the rotary shaft 203, it is possible to move the tracks on the optical medium 200 at high speed and improve the access speed. I can do things.

(Example 2) In the loading method of Example 1, the light source mounted on the floating optical head 207 was turned on during the loading operation.
By setting the FF state, it is possible to prevent the floating optical head 207 from irradiating the optical medium 200 with unnecessary light, so that damage to the optical medium 200 can be reduced.

That is, the optical medium 20 in operation such as recording and reproducing.
Light irradiation to 0 is necessary, but light irradiation to the medium being loaded only damages the optical medium 200 and is unnecessary. Therefore, turning off the light source during the loading operation can prolong the life of the optical medium 200 and is very useful.

Further, by turning off the light source during the loading operation, it is possible to prevent the light emitted from the floating optical head 207 from hitting the parts inside the apparatus other than the optical medium 200 or the inner wall. It is possible to prevent the deterioration of the characteristics of the parts inside the device and the deterioration of the inner wall.

In this embodiment, the light source mounted on the floating optical head 207 is turned off during the loading operation.
Although the F state is set, the damage applied to the optical medium 200 is considered to be much larger than the characteristic deterioration of the components inside the apparatus, so at least the medium facing surface of the floating optical head 207 and the recording on the optical medium 200 during loading. It is preferable to turn off the light source when the surfaces face each other.

Similarly, during the unloading operation,
It is preferable to turn off the light source.

Furthermore, in the above-mentioned embodiment, the light source is turned off, but the same effect can be obtained even if the light source is turned on so that the output is below a predetermined value and loading is performed.

That is, it is the most preferable condition for the optical medium 200 to perform loading with the light source turned off, but the light source is turned on so that the light amount does not affect the optical medium 200. May be. As a measure of this light amount, it is preferable that the light amount is smaller than the light amount emitted from the floating optical head 207 to the optical medium 200 during recording. Furthermore, during reproduction, the floating optical head 207 to the optical medium 20
It is more preferable that the amount of light is smaller than the amount of light applied to zero.

(Embodiment 3) In the loading method of (Embodiment 1), the focusing means (light from the light source is used as the optical medium 20 for each loading operation.
By fixing the means for collecting light at a predetermined spot on 0) in a predetermined state, the data read and write operations can be performed faster.

For example, when the state of the focusing means is different for each loading operation, the current state of the focusing means is first detected at the end of loading, and the focusing means cannot be moved unless it is thereafter.
If the state of the focusing means is fixed for each loading operation as in this embodiment, the focusing means can be moved immediately after the loading operation is completed, so that the data reading operation and the like can be performed faster.

(Embodiment 4) Next, an example of a floating optical head will be described with reference to FIG.

In FIG. 6, an optical head 1 includes a substrate 10 made of Si or the like, and an optical member 20 having a back surface fixed to the substrate 10 and made of an optically transparent material such as glass or plastic and having a substantially axially symmetrical shape. And is configured. The optical member 20 is formed by being integrally molded with a mold or the like and then coated with a necessary reflection film 22 or the like. A raising mirror 12 is attached to the substrate 10, and a semiconductor laser is joined as a light emitting element 11. As a result, the laser light emitted from the light emitting element 11 is deflected by the raising mirror 12 in a direction substantially vertical to the substrate 10. Further, on the substrate 10, the light receiving sensors 13a, 13b, 13 formed by the semiconductor process.
c and 13d are provided and divided into four substantially parallel to the data track direction 14.

The optical member 20 is provided with a condenser means 21 composed of a spherical concave lens, and a reflective film 22 is coated on the surface of the condenser means 21. Light collecting means 21
An incident portion 23 on which the laser light emitted from the light emitting element 11 and reflected by the rising mirror 12 is incident on a part of
And an emission part 24 for emitting light to the light receiving sensors 13a, 13b, 13c, 13d.

On the outer surface of the optical member 20, which is opposite to the inner surface on which the light collecting means 21 is formed, the light collecting means 21 is irradiated with the laser light incident from the incident portion 23, and is irradiated from the light collecting means 21. The received light from the light receiving sensors 13a, 13b, 13c, 1
The optical path correcting means 25 for irradiating the 3d, and the laser beam located at the substantially central portion of the optical path correcting means 25 for transmitting the laser light condensed by the condensing means 21 and irradiating the optical medium (not shown). A light transmission window 26 is formed. In the case of the first embodiment, the optical path correction means 25 is a composite of two types of reflection hologram patterns. The reflective hologram pattern is formed at the same time when the optical member 20 is integrally molded. The reflective film 22 is coated on the surface of the reflective hologram pattern except the light transmitting window 26.

More specifically, the hologram pattern for irradiating the condensing means 21 with the incident light from the incident portion 23 is substantially concentric, and the cross-sectional shape thereof is uneven or saw-toothed, and substantially the outer peripheral side. Has a smaller pitch.

Further, the hologram pattern for irradiating the light receiving sensors 13a, 13b, 13c, 13d with the laser light emitted from the light converging means 21 is substantially concentric and the center is deviated, and its cross-sectional shape is uneven. Alternatively, it has a saw-tooth shape. The size (diameter) of the light transmission window 26 is smaller than the size (diameter) of the optical path correction means 25.

The flying slider 30 is constructed so as to fly while maintaining a slight gap when the optical medium 200 rotates (a combination of the optical head 1 and the flying slider 30 corresponds to the flying optical head 207 of FIG. 1). ). Optical medium 200
Is composed of a disk substrate 111 made of plastic or the like, a recording film 112 formed on the surface of the disk substrate 111 by sputtering or the like, and a protective film 113 coated on the recording film 112. Further, on the surface of the disk substrate 111, a groove of about a data track is formed.

In the optical head 1, a part of the optical head 1 is arranged in the through hole 34 of the flying slider 30 so that the surface on which the light transmission window 26 is provided faces the optical medium 200, and the optical head is supported. It is elastically supported by the portion 40. The optical head support portion 40 is joined to the convex portion 36 of the flying slider 30 and the fixed portion 28 of the optical head 1 to form a leaf spring. Further, the distance between the surface provided with the light transmission window 26 and the optical medium 200 is set to be larger than the flying height of the flying slider 30.

The operation of the flying type optical head having such a configuration will be described. First, the process until the laser light emitted from the light emitting element 11 is focused on the optical medium 200, that is, the forward path will be described. The laser light emitted from the light emitting element 11 is deflected by the rising mirror 12 in a direction substantially perpendicular to the substrate 10. The deflected light passes through the incident portion 23, is reflected by the reflection hologram pattern of the optical path correction means 25, and is guided to the light condensing means 21. The condensing means 21 is composed of a spherical concave lens, and reflects the reflected laser light onto the optical medium 20.
The radius of curvature of the spherical surface is given so that the light is focused at zero.
The laser light condensed by the condensing means 21 passes through the light transmission window 26 and is applied to the optical medium 200.

The laser light condensed by the condensing means 21 is emitted from the light transmission window 26, passes through the air layer having a preset gap, and reaches the recording film 112 through the protective film 113 of the optical medium 200. To do.

Here, the reason why the light is reflected by using the reflection hologram pattern when the laser light is guided to the condenser means 21 will be described.

Generally, when light is condensed by a spherical concave lens, spherical aberration occurs, and the spherical aberration becomes larger on the outer peripheral side of the spherical surface. When spherical aberration occurs, the light cannot be focused into a minute spot, and high density cannot be achieved. Therefore, the reflection type hologram pattern is used to correct the spherical aberration by utilizing the diffraction of light to prevent the occurrence of the spherical aberration.

As a result, the laser beam focused by the focusing means 21 without spherical aberration is transmitted through the light transmission window 2.
The optical medium 200 is irradiated with the light passing through 6.

Next, the process until the laser light focused on the optical medium 200 reaches the light receiving sensors 13a, 13b, 13c, 13d, that is, the return path will be described.

The light condensed on the recording film 112 is reflected in a state corresponding to the recorded information, reaches the condensing means 21 through the light transmission window 26, and follows an optical path substantially opposite to the outward path. The correction means 25 is reached. A reflection type hologram pattern is formed on the optical path correcting means 25 so as to collect light on the light receiving sensors 13a, 13b, 13c and 13d.
The diffracted light from the optical path correcting means 25 reaches the light receiving sensors 13a, 13b, 13c, 13d through the emitting portion 24.

FIGS. 7 and 8 are an exploded perspective view and a sectional view showing a supporting device for a floating optical head used in an optical disk device according to an embodiment of the present invention.

In FIGS. 7 and 8, the optical disk device according to this embodiment has a drive coil section 50 which forms a focus drive means and a tracking drive means for displacing the optical head 1. The drive coil unit 50 includes a bobbin 53 formed of an annular frame body made of a material such as resin, and a ring-shaped yoke 54 made of a magnetic material, which is mounted inside the annular frame body of the bobbin 53. The first and second coils 51, 5 wound around the annular frame of the bobbin 53
2 and. The first coil 51 and the second coil 52 are wound substantially symmetrically by the same number of turns.
The drive coil unit 50 is bonded and fixed to the optical member 20 of the optical head 1. The optical head 1 and the flying slider 30 have the same configurations as those shown in FIG.

A magnet 55 is mounted on the slider holding portion 40a so as to surround the drive coil portion 50, and the magnet 5
5 and the drive coil unit 50 constitute an electromagnetic actuator.

An arm 90 (mounting part 2 in FIG.
04, 205, and 206) are movably supported in the direction crossing the track of the optical medium 200, and a slider support portion 80 (corresponding to the suspension 206 in FIG. 1) that presses and supports the flying slider 30 at the tip of the arm 90. ) Is fixed. The slider support portion 80 is fixed by crimping a caulking portion 86 formed on the fixing plate 85 into a fixing hole 91 at the tip of the arm 90. The slider supporting portion 80 is formed with a pressing spring portion 84 that presses the flying slider 30 with a substantially constant load value, a wide portion 81, and a bending portion 83.

A gimbal 82 is formed at the tip of the wide portion 81 of the slider supporting portion 80 by etching or the like. The convex portion 36 of the flying slider 30 is fixed to the slider holding portion 40a of the gimbal 82, and is configured to have a certain degree of freedom when the flying slider 30 is flying.

In the case of this embodiment, the gimbal 82, the pressing spring portion 84, the wide portion 81 and the bent portion 83 are formed of the same member, and the portion of the gimbal 82 is a plate for reducing the rigidity. It is etched in the thickness direction. It should be noted that the gimbal 82 may be previously formed of a thin plate and joined to the tip of the wide portion 81 by welding or the like.

The optical head support portion 40 is arranged at the center of the gimbal 82, and is formed of the same member as the gimbal 82 by etching or the like. Then, the fixing portion 28 of the optical head 1 is fixed to the optical head supporting portion 40,
The optical head 1 is elastically supported by the flying slider 30. With this configuration, the optical head 1
Has a degree of freedom in the bending direction (focus drive direction) of the optical head supporting portion 40 and the twisting direction (direction of rotating around the optical head supporting portion 40).

The flying type optical head 20 configured as described above.
A driving method in focus control of the supporting device of No. 7 will be described.

The optical head 1 is elastically supported by the flying slider 30 and movably in the focus driving direction. On the other hand, a ring-shaped drive coil portion 50 is fixed to the outer peripheral portion of the optical member 20 of the optical head 1 and is also movable in the focus drive direction. The drive coil unit 50 includes a yoke 54, a bobbin 53, a first coil 51, and a second coil 52, and the first coil 51 and the second coil 52 are substantially symmetrical. It is wound by the same number of turns and fixed to the bobbin 53. The magnets 55 are arranged substantially symmetrically so as to face the first coil 51 and the second coil 52, and are fixed to the convex portion 36 of the flying slider 30 via a gimbal 82. The drive coil section 50 and the magnet 55 form a magnetic circuit.

When a current is passed through the first coil 51, thrust is generated on the side where the first coil 51 is provided according to Fleming's left-hand rule. Since the optical head 1 is supported by the optical head support portion 40, the optical head support portion 4
A moment force is generated in such a direction as to rotate with 0 substantially at the center (29 in the figure). Similarly, when a current is passed through the second coil 52, a thrust force is generated on the side where the second coil 52 is provided, and a moment force is generated on the optical head 1.

When a current is applied to the first coil 51 and the second coil 52 so that the same thrust is generated in the same direction,
The moment force is canceled out, and a driving force is generated in the optical head 1 in the focus direction. This driving force is
It is the sum of the thrust generated by the first coil 51 and the thrust generated by the second coil 52. Then, the optical head supporting portion 4 supporting the driving force and the optical head 1
The optical head 1 is displaced to a position where the restoring force of 0 in the bending direction is balanced.

Therefore, the focus control may be performed by equalizing the amounts of currents flowing through the first coil 51 and the second coil 52 and controlling the currents so that the directions of the thrust forces generated in the respective coils are equal.

More specifically, the above-mentioned light receiving sensor 13
The sum of the light receiving amounts of a and 13d and the light receiving sensors 13b and 1
The first coil 51 and the second coil 51 are arranged so that the focus error signal obtained by taking the difference between the sum of the amount of light received by 3c and zero is zero.
By controlling the current flowing through the coil 52, the light spot emitted from the optical head 1 is focused on the optical medium 200.

In such an embodiment, when the floating type optical head is loaded on the optical medium 200 (see FIGS. 2 to 5), the light emitting element 11 (light source) is turned off, whereby the optical medium 200 is turned on. It is possible to prevent unnecessary light from being radiated to the members around and around the optical medium 200, and the optical medium 200 and members are not damaged.

It is also effective to load the light emitting element 11 with a light quantity lower than the light quantity of the light emitting element 11 at the time of recording, without turning off the light emitting element 11. More preferably,
It is more preferable to load with a light amount lower than that of the light emitting element 11 during reproduction.

Further, in the above-described embodiment, when the floating optical head 207 is loaded on the optical medium 200 (see FIGS. 2 to 5), current is not passed through the coils 51 and 52, so that focus is achieved. The means is fixed. Therefore, the floating optical head 207 is
Since the focus means is in a fixed state when it is levitated above 00, an electric current is passed through the first coil 51 and the second coil 52 to move the optical head in the optical medium 200 direction. Focusing can be performed immediately and data reading can be speeded up. As in the present embodiment, if the state of the focusing means is constant for each loading, the effect as described above can be obtained by moving the optical head or the like in only one direction. If the state of is different, be sure to move the focus means to the reference position,
Since focusing must be performed, it takes time for the optical head to read data from or write data to the optical medium 200.

Similarly, when loading, the first coil 5
The focusing means may be fixed by setting a current to the first and second coils 52.

It is preferable to fix the focusing means by controlling the currents flowing through the first coil 51 and the second coil 52 in this way.

As described above, the floating optical head 207 is fixed to the optical medium 200 by fixing the focusing means during loading (fixing the positional relationship between the flying slider 30 and the optical head in a predetermined state in this embodiment). Since the focusing can be performed immediately after the ascending to the surface, it is possible to minimize the time required to read data or the like.

[0082]

According to the present invention, the floating optical head disposed apart from the optical medium and the rotating optical medium are brought close to each other so that the floating optical head is levitated on the optical medium. Since the floating optical head and the optical medium do not rub against each other at times, the optical medium and the floating optical head are not scratched.

During the loading, unnecessary light emitted from the floating optical head is turned off by turning off the light source of the floating optical head or setting the amount of light emitted from the light source to a predetermined value or less. And the members inside the device are not irradiated, and the medium is not damaged.

Further, since the focusing means of the floating optical head is fixed to a predetermined position during the loading, focusing can be performed immediately after the loading is completed, so that the access speed can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an optical disk device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a loading method according to an embodiment of the present invention.

FIG. 3 is a front view showing a loading method according to an embodiment of the present invention.

FIG. 4 is a front view showing a loading method according to an embodiment of the present invention.

FIG. 5 is a front view showing a loading method according to an embodiment of the present invention.

FIG. 6 is a side view showing an example of a floating optical head used in an optical disk device according to an embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a floating optical head and its supporting device used in an optical disk device according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a floating optical head used for an optical disk device and a supporting device therefor according to an embodiment of the present invention.

[Explanation of symbols]

 11 Light-Emitting Element 51 First Coil 52 Second Coil 55 Magnet 200 Optical Medium 202 Arm 206 Suspension 207 Floating Optical Head 301, 302, 303 Load Bar

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G11B 21/12 F

Claims (14)

[Claims] 1. A method of loading a floating optical head, wherein a floating optical head is floated on an optical medium, wherein a floating optical head disposed away from the optical medium and a rotating optical medium are brought close to each other. A floating optical head loading method, characterized in that the floating optical head is floated on the optical medium by moving the optical head. 2. The method of loading a floating optical head according to claim 1, wherein the support is composed of an arm and a suspension, and a floating optical head is attached to the suspension. 3. The method of loading a flying optical head according to claim 2, wherein the flying optical head is composed of a flying slider and an optical head. 4. The method of loading a floating optical head according to claim 1, wherein the support is rotatably held. 5. The floating optical head is provided with a light source, and light is not emitted from the light source when the floating optical head and the optical medium are close to each other. 4. A method of loading a floating optical head according to any one of items 1. 6. A floating type optical head is provided with a light source, and the amount of light emitted from the light source when the floating type optical head and the optical medium are close to each other is made smaller than the amount of light at the time of recording. A method for loading a floating optical head according to claim 1, 2, or 4. 7. A floating type optical head is provided with a light source, and the amount of light emitted from the light source when the floating type optical head and the optical medium are brought close to each other is made smaller than the amount of light when reproducing data. The method for loading a floating optical head according to any one of claims 1, 2 and 4. 8. A focus means is provided, and the focus means is fixed in a predetermined state when the floating optical head and the optical medium are brought close to each other.
4. A method for loading a floating optical head according to any one of 4, 5, 6, and 7. 9. An optical medium, a drive means for rotating the optical medium, an rotatably provided arm, a suspension provided at the arm, a suspension provided at the suspension and apart from the optical medium. A floating optical head, and an approaching means for moving the floating optical head closer to the optical medium. The approaching means brings the floating optical head closer to the optical medium to move the floating optical head to the optical medium. An optical disk device characterized by being levitated on an optical medium. 10. The approaching means is a load bar having an inclined portion at a tip thereof, the load bar is arranged so that the inclined portion faces an optical medium, and the suspension is slid on the load bar. 10. The optical disk device according to claim 9, wherein the floating optical head is brought close to the optical medium in the section. 11. The flying light head is provided with a light source so that the light is not emitted from the light source when the floating light head and the optical medium are brought close to each other. 1. The optical disk device described in 1. 12. A floating optical head is provided with a light source, and the amount of light emitted from the light source when the floating optical head and the optical medium are close to each other is smaller than the amount of light during recording. The optical disk device according to claim 9. 13. A light source is provided in a floating optical head, and the light amount emitted from the light source when the floating optical head and the optical medium are close to each other is made smaller than the light amount at the time of data reproduction. The optical disk device according to any one of claims 9 and 10. 14. A focusing means is provided, and the focusing means is fixed in a predetermined state when the floating optical head and the optical medium are brought close to each other.
The optical disk device according to any one of 0, 11, 12, and 13.