JPH0836798A - Magneto-optical disk drive equipment - Google Patents

Abstract

PURPOSE:To enlarge the recording area of a magneto-optical disk. CONSTITUTION:In a state wherein a slider 6 is made eccentric so that a length L2 from a border line B1 to one side 6b thereof be longer than a length L1 to the other side 6a when the radial direction of a magneto-optical disk 101 is made to be the border line B1, the slider 6 is fitted to the fore end of a flecture 5. The slider 6 is provided with a magnetic field generating part 7 which moves in the radial direction of the magneto-optical disk 101 and impresses an external magnetic field on the disk. The slider 6 is fitted to the flecture 5 so that the front and rear sides 6c and 6d thereof in the direction of movement of a carriage have a prescribed tilt angle theta2 to the direction intersecting the direction of movement of the carriage perpendicularly so that the side 6b may separate from a protuberant part 106 in the outer circumference of the magneto-optical disk 101 and that the side 6b may approach the part 106, when the slider 6 is moved toward the protuberant part 106.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a magnetic field generating portion of a flying slider on an annular bulge which is inevitably generated on the outer peripheral portion of a protective film of a magneto-optical disk. By further approaching it, the recording area of the magneto-optical disk can be expanded.

[0002]

2. Description of the Related Art A magneto-optical disk as shown in FIG. 7 is known.

FIG. 7 is a sectional view of a magneto-optical disk 101. The magneto-optical disk 101 is formed by sequentially laminating a dielectric film 103, a recording film 104 and a protective film 105 on a substrate 102. .

The substrate 102 is made of a transparent material such as glass or plastic.

The dielectric film 103 is made of SiO ₂ .

The recording film 104 is made of a magneto-optical material such as Tb.
It is made of materials such as Fe, GdTbFe, and GdFeCo.

The protective film 105 is made of UV (ultraviolet) curable resin (hereinafter, simply referred to as UV).

The protective film 105 is formed by forming a dielectric film 103 and a recording film 104 on the substrate 102, and then UV
Is applied, the coating is rotated at a high speed to make the UV have a uniform thickness, and then the coating is cured by ultraviolet rays.

In FIG. 8, 106 is a raised portion formed on the outer periphery of the protective film 105.

Since the bulge portion 106 has a predetermined viscosity of UV, when it is applied on the recording film 104 and rotated at a high speed, it is inevitably generated due to the so-called surface tension. is there.

As a magneto-optical disk drive 111 for recording (writing) an information signal on the magneto-optical disk 101 and reproducing (reading) the recorded information signal, the one shown in FIG. 9 is known.

FIG. 9 shows a magneto-optical disk drive device 111.
It is a perspective view of the principal part of.

The magneto-optical disk drive device 111.
Are arranged on one side (lower surface) side of the magneto-optical disk 101 for rotating the magneto-optical disk 101 and the magneto-optical disk 101 rotated by the disk rotational driving mechanism 112. An optical pickup device 113 for recording and / or reproducing an information signal, a carriage 114 for moving the optical pickup device 113 in the radial direction of the magneto-optical disk 101, and a flexure 115 provided on the carriage 114. And a rectangular parallelepiped slider 116 attached to the tip of the flexure 115, and a surface of the magneto-optical disk 101 opposite to the optical pickup device 113 provided on one end side of the slider 116. And a magnetic field generator 117 for applying an external magnetic field.

The recording film 104 of the magneto-optical disk 101.
To record an information signal on the recording film 104, the laser beam of the optical pickup device 113 is focused and applied to the recording film 104.
This is performed by heating the portion to the Curie temperature or higher and applying an external magnetic field to the portion by the magnetic field generating portion 117.

Recording film 10 heated above the Curie temperature
No. 4 has lost the coercive force.

When an external magnetic field is applied to the recording film 104 having lost the coercive force by the magnetic field generator 117, the magnetization direction is reversed so as to follow the external magnetic field.

By thus reversing the magnetization direction of the recording film 104, a digitalized information signal is recorded on the recording film 104.

As shown in FIG. 10, the flexure 115 is formed in the shape of an elongated isosceles triangle, and the centerline Cl in the longitudinal direction is inclined at a predetermined inclination angle θ _{1 with} respect to the moving direction of the carriage 114. Is attached to the carriage 114 so as to form

Further, the slider 116, the radial direction of the magneto-optical disk 101 and the border line Bl, than the dimension L ₁ to one side 116a from the borderline Bl, by increasing the dimension L ₂ to the other side 116 b, Front and rear surfaces 116 in an eccentric state and in the carriage movement direction
The c and 116d are attached to the tip of the flexure 115 so that they are parallel to the direction orthogonal to the carriage movement direction.

[0020]

By the way, in the conventional magneto-optical disk device 111, the slider 11 is used.
Reference numeral 6 denotes one end portion of the one side surface 116a of the slider 116 (a corner portion where the one side surface 116a and the front surface 116c intersect) when it is moved to the outermost periphery of the magneto-optical disk 101.
There is a problem that a gap G is formed between 6a 'and the raised portion 106 on the outer circumference of the magneto-optical disc 101, and the gap G becomes a so-called dead space, and the recording area of the magneto-optical disc 101 is narrowed. It was

Because, as described above, the slider 116 has the border line Bl in the radial direction of the magneto-optical disk 101, and one side surface 1 from the border line Bl.
With respect to the direction in which the front and rear surfaces 116c and 116d in the carriage movement direction are orthogonal to the carriage movement direction, the dimension L ₂ up to the other side surface 116b is eccentric so as to be longer than the dimension L ₁ up to 16a. Since they are attached to the flexure 115 so as to be parallel to each other, when the slider 116 is moved to the outermost circumference of the magneto-optical disk 101, one end of one side surface 116a of the slider 116 (one side surface 116a and front surface 116c is 11)
6a ', one end portion of the other side surface 116b (the other side surface 116b
A corner portion 116b 'where b and the front surface 116c intersect is closer to the raised portion 106 on the outer circumference of the magneto-optical disk 101.

Then, the one end portion 11 of the other side surface 116b.
This is because the maximum movement position of the slider 116 to the outermost peripheral side of the magneto-optical disk 101 is determined with reference to the position where 6b 'comes closest to the raised portion 106.

The present invention has been made for the purpose of solving the above-mentioned conventional problems, and the one end portion 116a of the one side surface 116a of the slider 116 is simply changed by changing the arrangement (mounting) angle of the slider. ′ And the raised portion 106 of the magneto-optical disk 101, the disk space generated can be reduced and the amount of information recorded on the magneto-optical disk can be increased.

[0024]

According to a first aspect of the present invention, there is provided a disk rotation driving mechanism for rotating a magneto-optical disk, and a magneto-optical disk rotated by the disk rotation driving mechanism. An optical pickup device that records and reproduces an information signal on and from the magneto-optical disc, a carriage that moves the optical pickup device in the radial direction of the magneto-optical disc, a flexure provided on the carriage, and the flexure. A square attached to the tip of the lecture in an eccentric state so that the radial direction of the magneto-optical disk is a border line and the dimension from the border line to the other side is longer than the dimension from the side to the one side. Shaped slider, and a slider provided on the slider, which moves in the radial direction of the magneto-optical disk to form a magneto-optical disk In a magneto-optical disk drive device provided with a magnetic field generating unit for applying an external magnetic field, when the slider is moved toward the rising portion side of the outer periphery of the magneto-optical disk, the other side surface side is out of the rising portion. The front side and the rear side in the carriage moving direction are arranged so as to have a predetermined inclination angle with respect to the direction orthogonal to the carriage moving direction so that the one side surface side approaches the raised portion.

According to a second aspect of the present invention, in the magneto-optical disk drive apparatus according to the first aspect, the slider has front and rear surfaces in the carriage movement direction having a predetermined inclination angle with respect to a direction orthogonal to the carriage movement direction. Was attached to the flexure in a tilted state.

According to a third aspect of the present invention, in the magneto-optical disk drive device according to the first aspect, the flexure has a predetermined inclination angle with respect to a direction in which the front and rear surfaces of the slider in the carriage movement direction are orthogonal to the carriage movement direction. It was attached to the carriage as if it were held.

[0027]

According to the magneto-optical disk drive device of the present invention, when the slider is moved to the outermost peripheral side of the magneto-optical disk, the front and rear surfaces of the slider in the carriage moving direction are in the carriage moving direction. Compared to the conventional magneto-optical disk drive device that is arranged parallel to the direction orthogonal to the magneto-optical disk drive device, one side surface of the slider and the magnetic field generation section are closer to the ridge of the magneto-optical disk and the recording area for the magneto-optical disk is expanded. Let

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a magneto-optical disk drive device of the present invention will be described with reference to FIGS.

FIG. 1 is an exploded perspective view of a magneto-optical disk drive device 1 according to the first embodiment, and FIG. 2 is a plan view of a main part.

The magneto-optical disk drive device 1 comprises a disk rotation drive mechanism 2 for rotating the magneto-optical disk 101.
An optical pickup device 3 arranged on the lower surface side of the magneto-optical disc 101 rotated by the disc rotation drive mechanism 2 for recording and / or reproducing an information signal with respect to the magneto-optical disc 101; A carriage 4 for moving the optical pickup device 3 in the radial direction of the magneto-optical disk 101, a flexure 5 provided on the carriage 4, and a tip of the flexure 5 at the tip of the optical disc as shown in FIG. A border line Bl is set in the radial direction of the magnetic disk 101, and one side surface 6 is formed from the border line Bl.
a rectangular slider 6 mounted in an eccentric manner such that the dimension L ₂ up to the other side surface 6b is longer than the dimension L ₁ up to a, and the above-mentioned magneto-optical It is provided with a magnetic field generator 7 that moves in the radial direction of the disk 101 and applies an external magnetic field to the magneto-optical disk 101.

When the slider 7 is moved toward the raised portion 106 side on the outer periphery of the magneto-optical disk 101, the other side surface 6b side is separated from the raised portion 106, and the one side surface 6a side is the above. In front of the carriage movement direction so as to approach the rising portion 106,
The rear surfaces 6c and 6d are arranged so as to have a predetermined inclination angle θ ₂ with respect to the direction orthogonal to the carriage movement direction.

The magneto-optical disk 101 is shown in FIGS.
As described above, the substrate 102, the dielectric film 103,
It is formed by stacking the recording film 104 and the protective film 105, and is housed in the disc cartridge 121 as shown in FIG.

The disc rotation drive mechanism 2 comprises a spindle motor (not shown) and a turntable 12 mounted on a spindle shaft 11 of the spindle motor.

The turntable 12 is formed in a bottomed cylindrical shape, and the upper surface of the cylindrical portion 13 serves as a disk mounting surface 14.

A ring-shaped magnet 15 is attached to the inside of the cylindrical portion 13.

The magnet 15 attracts the chucking hub 101a of the magneto-optical disc 101 to hold the magneto-optical disc 101 on the disc mounting surface 14 of the turntable 12.

As shown in FIG. 3, the optical pickup device 3 comprises a movable portion 21 and a fixed portion 22.

The movable part 21 includes an objective lens 23 and a reflecting mirror 2.
It is equipped with 4.

The fixed portion 22 includes a semiconductor laser 25 and a collimator lens 26.

The laser beam reflected from the semiconductor laser 25 is converted into parallel light by the collimator lens 26, reflected by the reflecting mirror 24, passes through the objective lens 23, and is irradiated onto the magneto-optical disk 101. Has become.

Movable part 21 of the optical pickup device 3
Are mounted on the carriage 4.

As shown in FIG. 1, the carriage 4 is
Is attached between the pair of guide rails 31 and 32.

Linear motors 33 and 34 for driving the carriage are arranged on both sides of the guide rails 31 and 32.

The linear motors 33 and 34 are composed of magnets 35, yokes 36 and drive coils 37 provided on both sides of the guide rails 31 and 32, and the movable portions of the carriage 4 and the optical pickup device 3 are movable. 21 and a flexure 5, a slider 6, and a magnetic field generator 7 which will be described next are moved in the radial direction of the magneto-optical disk 101.

As shown in FIG. 2, the flexure 5 described above is used.
Is made of a leaf spring in the shape of an elongated isosceles triangle.

The flexure 5 has a center c in the longitudinal direction.
The short side is attached to the flexure support portion 42 of the carriage 4 via the mount plate 41 so that l has a predetermined inclination angle θ ₃ with respect to the moving direction of the carriage 4.

A slider 6 is attached to the tip of the flexure 5 through an adapter, a flexure, or the like (not shown).

The slider 6 is made of ceramic and has a rectangular parallelepiped shape.

As described above, the slider 6 having the rectangular parallelepiped shape has a flexure so that the front and rear surfaces 6c and 6d in the carriage movement direction have a predetermined inclination angle θ ₂ with respect to the direction orthogonal to the carriage movement direction. It is attached to the tip of 5.

The inclination angle θ ₂ is one side surface 6 of the slider 6 when the slider 6 moves toward the raised portion 106 on the outer circumference of the magneto-optical disk 101.
The one end 6a 'on the a side is made to approach the raised portion 106 more than the one end 6b' on the other end face 6b side.

In the embodiment, the inclination angle θ ₂ is set to about 3 ° in consideration of the inner diameter of the annular raised portion 106, the size of the slider 6 or the amount of eccentricity.

The magneto-optical disk drive device of the first embodiment has the structure as described above.

Therefore, when the slider 6 moves toward the raised portion 106 of the protective film 105 of the magneto-optical disk 101 during the recording of the information signal on the magneto-optical disk 101, as shown in FIG. One side 6
The one end portion 6a 'on the a side approaches the raised portion 106 more than the other side surface 6b side and the one end portion 6b', and expands the recording area of the magneto-optical disk 101.

5 to 6 show a second embodiment.

In this embodiment, the slider 6 is attached to the tip of the flexure 5 so that the front and rear surfaces 6c and 6d in the carriage movement direction are perpendicular to the center line Cl of the flexure 5. .

The flexure 5 includes the slider 6
The front and rear surfaces 6c and 6d have a predetermined inclination with respect to the carriage movement direction so that they have an inclination angle θ ₂ of approximately 3 ° with respect to the direction orthogonal to the carriage movement direction, as in the case of the first embodiment. It is attached to the carriage 4 at an angle θ ₄ .

Since the magneto-optical disk drive device of the second embodiment has the structure as described above, the magneto-optical disk 1 is the same as the magneto-optical disk drive device of the first embodiment.
When the slider 6 moves toward the raised portion 106 of the protective film 105 of the magneto-optical disk 101 during the recording of the information signal to 01, as shown in FIG. One end portion 6a 'of the ridge 1 is equal to or more than the one end portion 6b' on the side of the other end surface 6b.
The recording area of the magneto-optical disk 101 is expanded by approaching 06.

[0058]

The magneto-optical disk drive device of the present invention has the following effects.

(1) In the magneto-optical disk drive device according to the first aspect, the recording area of the magneto-optical disk is expanded by bringing the magnetic field generating portion provided on the slider closer to the raised portion of the magneto-optical disk than in the conventional case. can do.

(2) In the magneto-optical disk drive device of the second aspect, the recording area of the magneto-optical disk can be expanded by a simple means of changing the mounting angle of the slider with respect to the flexure.

(3) In the magneto-optical disk drive device of the third aspect, since the mounting angle of the flexure with respect to the carriage is changed, the recording area of the magneto-optical disk can be recorded without changing the mounting angle of the slider with respect to the flexure. Can be expanded.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a plan view of a main part.

FIG. 3 is a schematic sectional view of an optical pickup device.

FIG. 4 is a plan view showing a state where the slider is closest to the raised portion.

FIG. 5 is a plan view of an essential part of the second embodiment.

FIG. 6 is a plan view showing a state where the slider is closest to the raised portion.

FIG. 7 is a sectional view of a magneto-optical disk.

FIG. 8 is a partially enlarged sectional view of a magneto-optical disk.

FIG. 9 is a perspective view of a conventional magneto-optical disk drive device.

FIG. 10 is a plan view showing a conventional problem.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Magneto-optical disk drive apparatus 2 ... Disk rotation drive apparatus 3 ... Optical pick-up apparatus 4 ... Carriage 5 ... Flexure 6 ... Slider 7 ... Magnetic field generation part 101 ... Magneto-optical disk 105 ... Protective film 106 ... Protective film raised part

Claims (3)

[Claims] 1. A disk rotation driving mechanism for rotating a magneto-optical disk, and an information signal recorded on the magneto-optical disk, which is arranged on one side surface side of the magneto-optical disk rotated by the disk rotation driving mechanism. And an optical pickup device for reproducing, a carriage for moving the optical pickup device in the radial direction of the magneto-optical disc, a flexure provided on the carriage, and a radius of the magneto-optical disc at the tip of the flexure. A quadrilateral slider mounted in an eccentric manner so that the direction is a border line, and the dimension from the border line to one side surface is longer than the dimension from the border line to the other side surface. , A magnetic field generator that moves in the radial direction of the magneto-optical disk to apply an external magnetic field to the magneto-optical disk. In the slider, when the slider is moved toward the raised portion side of the outer circumference of the magneto-optical disk, the other side surface side is separated from the raised portion, and the one side surface side approaches the raised portion. Thus, the magneto-optical disk drive device is characterized in that the front and rear surfaces in the carriage movement direction are arranged so as to have a predetermined inclination angle with respect to the direction orthogonal to the carriage movement direction. 2. The slider according to claim 1, wherein the slider is tilted with respect to the flexure so that the front and rear surfaces in the carriage moving direction have a predetermined tilt angle with respect to a direction orthogonal to the carriage moving direction. A magneto-optical disk drive device characterized by being attached. 3. The flexure according to claim 1, wherein the front and rear surfaces of the slider attached to the tip of the slider in the carriage movement direction have a predetermined inclination angle with respect to a direction orthogonal to the carriage movement direction. A magneto-optical disk drive device characterized in that it is attached to.