JP3237210B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is most suitable for use in a magneto-optical disk drive capable of repeatedly recording and reproducing information on a magneto-optical disk using a magnetic field head and an optical head. It relates to a disk device.

[0002]

2. Description of the Related Art Conventionally, in a magneto-optical disk drive, a magnetic field head comprising a magnet and a coil is brought close to the MO film side, which is one surface of the magneto-optical disk, and a glass plate which is the other surface of the magneto-optical disk is provided. The optical head is placed close to the side. When re-recording (overwriting) information on the magneto-optical disk, the magnetic field of the MO film of the magneto-optical disk is reversed by a magnetic head to erase the information, and then the information is written by the optical head. Thus, recording (writing) and reproduction (reading) of information on a magneto-optical disk can be repeatedly performed.

As a conventional magneto-optical disk device, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-2660, a large magnet long and arranged over almost the entire width in the radial direction of the magneto-optical disk and its magnet are disclosed. The magnetic field of the MO film is reversed by using a large magnetic field head consisting of a large coil arranged on the outer periphery and inverting the magnet around the rotation center along the radial direction of the magneto-optical disk. There is.

[0004]

However, as in the prior art, a magneto-optical disk drive using a large magnetic field head has a problem.
This is a major obstacle to miniaturization and weight reduction. In a magnetic field head for reversing a large magnet, a large gap must be provided between the magnet and the MO film of the magneto-optical disk, a large coil is also required, and power consumption increases. The method of reversing a large and heavy magnet has a problem that the access time cannot be shortened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and can move a small magnetic field head in a substantially radial direction of a disk while maintaining a gap of a submicron order with respect to the disk. It is an object of the present invention to provide such a disk device.

[0006]

In order to achieve the above object, a disk drive according to the present invention is provided with a magnetic field head for applying a magnetic field to a disk for information recording, which is mounted at the tip.
Attached to the carriage, and
By driving the cartridge by the head moving mechanism,
The magnetic field head is moved through the suspension to approximately the diameter of the disk.
To the end of the suspension
Of the disc from the inner circumference to the outer circumference.
By guiding with a newly installed guide mechanism,
Move the magnetic field head to the disk with
It is configured to be moved. In this case, the guide
The part is elastically pressed by the suspension against the magnetic head sliding part of the guide mechanism from the side opposite to the disk.
Be configured as has been slid is, provided with a pair of magnetic field head sliding portion of the guide mechanism in parallel form, the ends of the guided portion provided at the tip Sa Supen <br/> Deployment of the magnetic field head
Protrudes at right angles to a pair of magnetic head sliding parts on both sides
Then, slide both ends of the guided portion with a pair of magnetic field heads.
Of the suspension,
Negative pressure slider attached to the tip via gimbal
The magnetic field head is attached to the disk, and the negative pressure slider
It is preferable to configure so as to approach the surface side .

[0007]

According to the disk apparatus of the present invention having the above-described structure , a magnetic field is applied to the information recording disk.
Carry the suspension with the head attached to the tip
The carriage by the head moving mechanism.
The magnetic field head through the suspension.
When moving the disk almost radially, the suspension
The guided portion provided at the tip of the disk is guided by a guide mechanism installed from the inner peripheral side to the outer peripheral side of the disc .
The disk of the magnetic field head at the tip of the suspension
Vertical vibration is suppressed by the guide mechanism and guide section
Is what you can do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a magneto-optical disk drive according to the present invention will be described below with reference to the drawings.

First, an outline of the magneto-optical disk drive 1 will be described with reference to FIGS.

A spindle motor 3 is mounted on a chassis 2, and a magneto-optical disk 4, which is an information recording disk fixed horizontally to a spindle 3a, is driven by the spindle motor 3 to rotate at a high speed, for example, in the direction of arrow a. It is configured as follows.

An optical head 5 is vertically disposed below the magneto-optical disk 4, and a small magnetic field head 6 opposed to the optical head 5 is vertically downwardly disposed above the magneto-optical disk 4. .

A head moving mechanism 8 for integrally moving the optical head 5 and the magnetic field head 6 in a direction indicated by an arrow b, which is a radial direction of the magneto-optical disk 4, includes an optical head 5
And a suspension 10 made of a leaf spring is fixed on the carriage 9, and the tip 1 of the suspension 10 is
The magnetic field head 6 is attached to a lower portion of the magnetic field head 0a. And
The carriage 9 is horizontally laid via a plurality of guide rollers 13 between two parallel guide shafts 12 laid horizontally on the chassis 2 and is configured to be movable in the direction of arrow b. The linear motor 14 constituting the driving means of the carriage 9 includes a magnet 15 and yokes 16 and 17 fixed on the chassis 2 in parallel with the guide shaft 12, and a linear motor 14 fixed on the side surface of the carriage 9 on the outer periphery of the yoke 17. And the inserted coil 18.

According to the head moving mechanism 8, the carriage 9 is driven by the linear motor 14 along the two guide shafts 12 in the direction of the arrow b.
Then, the optical head 5 and the magnetic field head 6 are integrally moved via the suspension 10 in the direction of arrow b parallel to the magneto-optical disk 4. Then, a laser beam 20 radiated from the semiconductor laser 19 or the like to the optical head 5 in parallel with the guide shaft 12 is vertically radiated from below onto the glass plate side of the magneto-optical disk 4 through the optical system 21 and the objective lens 22 to generate a magnetic field. The recording and reproduction of the magneto-optical disk 4 are performed in connection with the operation of reversing the magnetic field of the MO film of the magneto-optical disk 4 by the head 6.

Next, referring to FIG. 1 to FIG.
The guide mechanism 24 will be described.

As shown in FIG. 5, a guide base 25 mounted on the chassis 2 is disposed horizontally above the magneto-optical disk 4, and a pair of guide shaft mounting portions 25a of the guide base 25 are used to mount the two guide shafts. Both ends of two guide shafts 26, which are sliding portions of the magnetic field head parallel to the guide shaft 12, are located at upper positions of the magneto-optical disk 4 and are horizontally installed from the inner peripheral side to the outer peripheral side of the magneto-optical disk 4. .

As shown in FIG. 4, both ends of two guide shafts 26 are connected to guide shaft mounting portions 25a by height adjusting screws 2.
7 and a height adjusting spring 28. The height and the parallelism of the two guide shafts 26 with respect to the magneto-optical disk 4 can be adjusted with high accuracy by adjusting the height adjusting screw 27. I have.

Next, as shown in FIGS. 1 to 3, the suspension 10 is constituted by a leaf spring having a U-shaped cross section, and has a tip 10a having a horizontal guided portion orthogonal to the two guide shafts 26. in a support bar 29 is welded, it is slidably mounted in the direction of the arrow b at both ends of the support rods 29 on the two guide shafts 26. As shown in FIG.
A low friction member 30 made of grease, resin coat, or the like is provided on the outer periphery of the two guide shafts 26 to improve the slidability of the support rod 29 on these guide shafts 26.

Next, a negative pressure slider 32 is attached to the lower surface of the tip 10 a of the suspension 10 via a gimbal 31. This gimbal 31 is suspension 1
Body 3 spot-welded 33 to the lower surface of the tip 10a
1a and a movable piece 31c cut out by a substantially U-shaped notch 31b in the main body 31a thereof.
A negative pressure slider 32 is adhered 34 to the lower surface of c.
The movable piece 31c is orthogonal to the direction of the arrow b, and has a structure in which vibration is less likely to occur when the suspension 10 moves the negative pressure slider 32 in the direction of the arrow b.

As shown in FIG. 1, a magnet 6a and a coil 6b are provided at the center of the lower surface of the negative pressure slider 32.
The small-sized magnetic field head 6 constituted by the above is embedded.

As shown in FIG. 1, the magneto-optical disk 4 has an MO film 4b applied to the upper surface of a glass plate 4a and a UV coat 4c formed on the upper surface.

According to the magneto-optical disk drive 1 constructed as described above, as shown in FIG.
Arrow c with the magnetic field head 6 down due to the elastic biasing force
The two ends of the support rod 29 are elastically pressed on the two guide shafts 26 from the opposite side to the magneto-optical disk 4.

When the magneto-optical disk 4 is driven to rotate at a high speed in the direction of arrow a, the airflow 35 generated on the surface thereof is increased.
Flows into the negative pressure action portion 32a formed on the lower surface of the negative pressure slider 32 to generate a negative pressure between the negative pressure slider 32 and the magneto-optical disk 4, and the negative pressure action causes the negative pressure slider 32 to generate a negative pressure. In the direction of arrow c.

As a result, both ends of the support rod 29 are stably pressed on the two guide shafts 26 from the direction of arrow c, and
The magnetic field head 6 at the tip 10a of the pension 10
It is possible to suppress vertical vibration with respect to the disk 4.
Wear. As a result, the gap G between the magnet 6a of the magnetic field head 6 and the MO film 4b of the magneto-optical disk 4 is 0.1 to 0.1.
It is regulated with high precision to the submicron order of about 0.2 μm.

As shown in FIG. 2, when the magnetic head 6 is moved in the direction of the arrow b by the suspension 10, the gap G is stably held by the two guide shafts 26 throughout.

In addition, at this time, the support rod 29 can be slid in the direction of arrow b on the two guide shafts 26 with stability, while the negative pressure slider 32 is provided on the lower surface of the tip 10a of the suspension 10 via the gimbal 31. In addition, since the magnetic field head 6 is attached, the negative pressure slider 32 can freely swing in the direction of arrow d in FIG. 1 with respect to the suspension 10 according to the undulation (distortion) of the surface of the magneto-optical disk 4. Therefore, the parallelism of the negative pressure slider 32 and the magnetic field head 6 to the spindle motor 3 can be maintained with high accuracy.

As described above, since the gap G can be maintained with high precision on the order of submicrons, the size of the coil 6b of the magnetic field head 6 can be reduced, and the frequency characteristics can be improved. The power consumption required to reverse the magnetic field of the MO film 4b can be reduced.

The size and weight of the magnetic field head 6 can be reduced, and the access time of the optical head 5 and the magnetic field head 6 in the direction of arrow b can be shortened.

However, since the gap G can be maintained with high accuracy by the two guide shafts 26, it is very resistant to vibration and shock, and the magnetic field head 6 unexpectedly collides with the magneto-optical disk 4 and Is not damaged at all, and the allowable range of the material of the UV coat 4c, which is the surface material of the magneto-optical disk 4, and the flatness thereof can be increased.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to the embodiments described above, and various modifications can be made based on the technical idea of the present invention.

[0030]

The magneto-optical disk drive of the present invention constructed as described above has the following effects.

Applying a magnetic field to an information recording disk
With a rotating magnetic field head attached to the tip
To the carriage, and move this carriage to the head.
Driven by a mechanism to move the magnetic field head to the suspension
When moving in substantially radial direction of the disk through, suspend
The guided portion provided at the end of the disc is guided by a guide mechanism installed from the inner peripheral side to the outer peripheral side of the disc.
This allows the magnetic head at the tip of the suspension to
The vertical vibration of the disk is controlled by the guide mechanism and the guide.
Since to be able to suppress I, to compensate for the inter <br/> gap with respect to the disk of the magnetic field head is moved <br/> substantially radial direction of the disk with high precision in a gap in the submicron order I can . Therefore, the size of the coil of the magnetic field head can be reduced, and the frequency characteristics are improved, so that the power consumption can be reduced.

Since the size and weight of the magnetic field head can be reduced, the access time of the magnetic field head and the optical head can be shortened.

[0033] very strongly against vibration and shock, the magnetic field header
The gap between the disk and the disk must be on the order of submicron.
Although it can be set to , the collision between the magnetic field head and the magneto-optical disk can be completely prevented, so safety,
Very high reliability.

Since there is no danger that the magnetic field head collides with or comes into contact with the disk, the allowable range of the surface material of the disk and its flatness can be made large, and the disk can be easily manufactured.

Since a small magnetic field head can be used, the size and weight of the disk drive can be reduced.

The guided portion is suspended from the side opposite to the disk with respect to the magnetic head sliding portion of the guide mechanism.
By or configured to be slid is elastically pressed, provided with a pair of magnetic field head sliding portion of the guide mechanism into parallel form, the guided portion provided at the tip of the suspension
Both ends on a pair of magnetic head sliding parts on both sides of the magnetic head
Protrude at right angles to each other, and
It is configured to be guided by the pair of magnetic field head sliding parts ,
Attach to the tip of the suspension via gimbal
Attach a magnetic field head to the negative pressure slider, and move the negative pressure slider
The disc surface closer to the disc surface.
Thus, the gap between the magnetic field head and the disk and the parallelism of the magnetic field head to the surface of the disk can be ensured with high accuracy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a main part of a magneto-optical disk device according to an embodiment of the present invention, taken along line AA of FIG.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view of FIG. 2 from which a suspension is removed.

FIG. 4 is a sectional side view showing a height adjusting mechanism of a guide shaft.

FIG. 5 is a partially cutaway plan view of the entire magneto-optical disk device.

FIG. 6 is a cross-sectional side view taken along the line BB of FIG. 5;

7 is a cross-sectional side view taken along the line CC of FIG. 5;

[Explanation of symbols]

1 Magneto-optical disk device as a disk device 4 Magneto-optical disk as information recording disk 5 Optical head 6 Magnetic field head 8 Head moving mechanism 9 Carriage 10 Suspension 10a Suspension tip 11 Gimbal 24 Guide mechanism 26 Magnetic field sliding portion Guide shaft 29 Support rod as guided part 32 Negative pressure slider

Claims (4)

(57) [Claims] 1. A magnetic field head for applying a magnetic field to an information recording disk, and a suspension having the magnetic field head attached to a tip thereof.
When, the outer periphery and a carriage to which the suspension is attached, by driving the carriage, a head moving mechanism for moving the magnetic field head a substantially radial direction of the through the suspension disk, from the inner circumference side of the disc A guide mechanism installed over the side, and a guide mechanism provided at the tip of the suspension,
The magnetic field head is guided forward by the
The disk to be moved while compensating for a certain gap
A disk device comprising a guide portion . Wherein said support from the opposite side of the said disc above the guide portion with respect to the magnetic field head sliding portion of the guide mechanism
It is slid elastically pressed by the spence
2. The disk device according to claim 1, wherein the disk device is configured as follows . 3. A magnetic head sliding portion of the guide mechanism is provided in a pair in parallel, and the magnetic head sliding portion is provided at a tip of the suspension.
Place both ends of the guided part on both sides of the magnetic field head
Project perpendicularly to the sliding part of the magnetic field head.
Both ends of the guided part are guided by the pair of magnetic head sliding parts.
Claim 1 or 2, characterized by being configured so as to
The disk device as described above. 4. A gimbal is provided at the tip of the suspension.
The above magnetic field head to the negative pressure slider
Mounting, due to the negative pressure generated by the rotation of the disk
Place the negative pressure slider against the disk surface against the gimbal.
3. The apparatus according to claim 2, wherein the apparatus is configured to approach the object.
Or the disk device according to 3.