JP3264041B2 - Magneto-optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a magnetic field generating portion for a flying slider, which is formed on an annular bulge formed inevitably on the outer peripheral portion of a protective film of a magneto-optical disk when the protective film is formed. By moving closer, 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. 13 is known.

FIG. 13 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. .

[0004] The substrate 102 is made of a transparent material such as glass or plastic.

[0005] The dielectric film 103 is made of SiO ₂ .

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

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

[0008] The protective layer 105, after forming the dielectric film 103, a recording film 104 on the substrate 102, UV thereon
Is applied and rotated at a high speed to make the UV uniform in thickness, and then cured by ultraviolet light.

In FIG. 14, reference numeral 106 denotes a raised portion formed on the outer periphery of the protective film 105.

[0010] The raised portion 106, for UV has a predetermined viscosity, this when rotating at high speed is applied on the recording film 104, in which inevitably occur in relation called surface tension is there.

[0011] As the magneto-optical disk to 101 records information signals (write), also reproduces the recorded information signals (reading) optical disk drive 111, there is known, as shown in FIG. 15.

FIG. 15 shows a magneto-optical disk drive device 11.
1 is a perspective view of a main part of FIG.

The magneto-optical disk drive device 111
Are disposed on one side (lower surface) of the magneto-optical disk 101 that is rotated by the disk rotation driving mechanism 112 and the disk rotation drive mechanism 112 that rotates the magneto-optical disk 101. recording and / or reproducing information signals on an optical pickup device 113, before the optical pickup device 113
A carriage 114 which moves in the radial direction of the serial optical magnetic disk 101, and full lecture 115 provided on the carriage 114, the slider 116 of the cuboid shape attached to the distal end of the full lecture 115, of the slider 116 provided on one end side, and a magnetic field generating unit 117 for applying an external magnetic field on the opposite side of the optical pickup device 113 of the magneto-optical disk 101.

[0014] recording layer 104 of the magneto-optical disc 101
Recording of information signals to the by focusing the laser beam of the optical pickup apparatus 113, applied to the recording film 104,
While heating the portion above the Curie temperature, it is performed by applying an external magnetic field by the <br/> magnetic field generator 117 to the site.

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

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

As described above, by inverting the magnetization direction of the recording film 104, an information signal converted into a digital signal is recorded on the recording film 104.

As shown in FIG. 16, the fracture 115 is formed in an elongated isosceles triangular shape, and its center line Cl in the longitudinal direction is parallel to the moving direction of the carriage 114 and at a predetermined angle. It is attached to the carriage 114 with a distance d.

The slider 116 is used to move a laser beam condensing portion in the radial direction of the magneto-optical disk 101.
The moving axis is set to the border line B1, and the border line B
from l than the dimension L ₁ to the first side (one side) 116a, and a long dimension L ₂ until the second side (other side) 116 b, in a state decentered, and the third, fourth Side (front, back
The surface is mounted on the tip of the flexure 115 so that the surfaces 116c and 116d are parallel to the direction orthogonal to the movement axis .

[0020]

[SUMMARY OF THE INVENTION Incidentally, the In the conventional magneto-optical disk apparatus 111, the slider 11
6, when moving to the outermost periphery of the magneto-optical disk 101, the one end portion of the first side 116a of the slider 116 (the first side 116a and the third side 116c and intersect corner) 116a ' gap G occurs between the outer periphery of the raised portion 106 of the magneto-optical disk 101, the clearance G becomes so-called Deddosupesu, recording area of the magneto-optical disc 101 there was a problem that is narrowed.

[0021] This is because, as described above, the slider 116, and the radial direction of the optical disk 101 borderline Bl, than the dimension L ₁ from the border line Bl to the first side 116a, a second while dimensions L ₂ is made eccentric to be longer up to the edge 116 b, and the
3. The fourth sides 116c and 116d are orthogonal to the movement axis.
When the slider 116 is moved to the outermost periphery of the magneto-optical disk 101, the first side 1 of the slider 116 is
16a (a first side 116a and a third side 116c).
Corner) intersecting with the second side 116b
(A corner where the second side 116b and the third side 116c intersect) 116b 'is closer to the raised portion 106 on the outer periphery of the magneto-optical disk 101.

One end 116b 'of the second side 116b
This is because the maximum movement position of the slider 116 toward the outermost peripheral side of the magneto-optical disk 101 is determined based on the position of the slider 116 closest to the raised portion 106.

The present invention has been made to solve the above-mentioned conventional problems.

[0024]

Means for Solving the Problems The invention of claim 1 is the outermost one.
A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion on the periphery , and one of the magneto-optical disks
Of the magneto-optical disk.
Optical pickup device for recording and reproducing an information signal by condensing a laser beam through the optical pickup device;
The optical pickup is mounted so that the laser beam condensing part moves in the radial direction of the magneto-optical disk.
A carriage that moves with-up device, the full lecture provided on said carriage, said laser beam focusing
The first and second sides substantially parallel to the movement axis of the optical unit;
The third and fourth sides in the direction intersecting with the movement axis
And the first side substantially parallel to the movement axis,
With the eccentric position closer to the movement axis than the second side, the one side of the magneto-optical disk is
The tip of the fracture so that it is located on the opposite board side
A substantially rectangular slider attached to the end, and the moving axis
Provided on the slider at a position above the line,
A magnetic field generating unit for applying an external magnetic field to the laser beam focusing unit , and a magneto-optical disk drive device comprising:
Raise the slider on the outer circumference of the magneto-optical disk.
When it is moved toward the
The third and fourth of the slider approaching while facing
Either side of the side of the outer periphery of the magneto-optical disk
Concentric with the bulge and smaller than the bulge
It was formed on an arc surface with a small curvature.

According to the second aspect of the present invention, the outermost peripheral portion rises.
A disk rotating mechanism for rotating the magneto-optical disk having a part, is disposed on one disk surface side of the magneto-optical disk
And a laser beam is applied to the magneto-optical disk.
An optical pickup device for recording and reproducing an information signal by condensing light, and mounting the optical pickup device,
The condensing portion of the laser beam moves together with the optical pickup device so as to move in the radial direction of the magneto-optical disk.
A carriage for moving a full lecture provided on the carriage, the movement axis of the condensing portion of the laser beam
With respect to the first and second sides substantially parallel to the
And the third and fourth sides in the direction intersecting with each other,
The first side substantially parallel to the line is more than the second side
In a state in which also is decentered in a position closer to the axis of movement, the light
On the surface of the magnetic disk opposite to the one surface
Attached to the tip of the fracture to be placed
A substantially rectangular slider and a position above the movement axis
And provided on the slider,
Light and a magnetic field generator for applying an external magnetic field to the condensing unit
A magnetic disk drive device, wherein the slider is
The magnetic disk is moved toward the raised portion on the outer periphery of the magneto-optical disk.
When moving, approach and approach the bulge
One of the third and fourth sides of the slider
Is flat in the direction perpendicular to the movement axis.
A flat surface and an end of the flat surface on the first side.
A first chamfered inclined surface and a second chamfered flat surface.
A second chamfered inclined surface provided at the side end.
Done.

According to the third aspect of the present invention, the bulge is formed at the outermost peripheral portion.
A disk rotating mechanism for rotating the magneto-optical disk having a part, is disposed on one disk surface side of the magneto-optical disk
And a laser beam is applied to the magneto-optical disk.
An optical pickup device for recording and reproducing an information signal by condensing light, and mounting the optical pickup device,
The condensing portion of the laser beam moves together with the optical pickup device so as to move in the radial direction of the magneto-optical disk.
A carriage for moving a full lecture provided on the carriage, the movement axis of the condensing portion of the laser beam
With respect to the first and second sides substantially parallel to the
And the third and fourth sides in the direction intersecting with each other,
The first side substantially parallel to the line is more than the second side
In a state in which also is decentered in a position closer to the axis of movement, the light
On the surface of the magnetic disk opposite to the one surface
Attached to the tip of the fracture to be placed
A substantially rectangular slider and a position above the movement axis
And provided on the slider,
Light and a magnetic field generator for applying an external magnetic field to the condensing unit
A magnetic disk drive device, wherein the slider is
When the optical disk is moved toward the raised portion on the outer periphery of the magneto-optical disk, it is approached while facing the raised portion.
Moving one of the third and fourth sides
It is provided at the position on the axis and is closest to the bulge
A first side provided on the first side with a top portion as a boundary
A chamfered inclined surface and a second side of the flat surface.
And a second chamfered inclined surface.

[0027]

According to a fourth aspect of the present invention, in the magneto-optical disk drive of the third aspect, the first and second chamfers are formed.
The inclined surface, formed by a curved surface.

According to a fifth aspect of the present invention, a bulge is formed on the outermost peripheral portion.
A disk rotating mechanism for rotating the magneto-optical disk having a part, is disposed on one disk surface side of the magneto-optical disk
And a laser beam is applied to the magneto-optical disk.
An optical pickup device for recording and reproducing an information signal by condensing light, and mounting the optical pickup device,
The condensing portion of the laser beam moves together with the optical pickup device so as to move in the radial direction of the magneto-optical disk.
A carriage for moving a full lecture provided on the carriage, the movement axis of the condensing portion of the laser beam
With respect to the first and second sides substantially parallel to the
And the third and fourth sides in the direction intersecting with each other,
The first side substantially parallel to the line is more than the second side
In a state in which also is decentered in a position closer to the axis of movement, the light
On the surface of the magnetic disk opposite to the one surface
Attached to the tip of the fracture to be placed
A substantially rectangular slider and a position above the movement axis
And provided on the slider,
Light and a magnetic field generator for applying an external magnetic field to the condensing unit
A magnetic disk drive device, wherein the slider is
When the optical disk is moved toward the raised portion on the outer periphery of the magneto-optical disk, it is approached while facing the raised portion.
The lower end of one of the third and fourth sides,
It was formed on a round surface.

According to a sixth aspect of the present invention, the bulge is formed on the outermost peripheral portion.
A disk rotating mechanism for rotating the magneto-optical disk having a part, is disposed on one disk surface side of the magneto-optical disk
And a laser beam is applied to the magneto-optical disk.
An optical pickup device for recording and reproducing an information signal by condensing light, and mounting the optical pickup device,
The condensing portion of the laser beam moves together with the optical pickup device so as to move in the radial direction of the magneto-optical disk.
A carriage for moving a full lecture provided on the carriage, the movement axis of the condensing portion of the laser beam
With respect to the first and second sides substantially parallel to the
And the third and fourth sides in the direction intersecting with each other,
The first side substantially parallel to the line is more than the second side
In a state in which also is decentered in a position closer to the axis of movement, the light
On the surface of the magnetic disk opposite to the one surface
Attached to the tip of the fracture to be placed
A substantially rectangular slider and a position above the movement axis
It provided have been on the slider, the Rezabi over beam
Light and a magnetic field generator for applying an external magnetic field to the condensing unit
A magnetic disk drive device, wherein the slider is
When the optical disk is moved toward the raised portion on the outer periphery of the magneto-optical disk, it is approached while facing the raised portion.
The lower end of one of the third and fourth sides,
It was formed on a chamfered inclined surface.

[0031]

In the magneto-optical disk drive of the first aspect, the slider is raised on the outer periphery of the magneto-optical disk.
When the slider is moved toward the
Third, the central portion of one of the four sides is closest to the raised portion on the outer periphery of the magneto-optical disk, and the magnetic field generating portion can be made closer to the raised portion, so that recording on the magneto-optical disk can be performed. Enlarge the area.

In the magneto-optical disk drive of the second aspect, the slider is raised on the outer periphery of the magneto-optical disk.
When moving toward the rising portion, said slider
The flat surface of one of the third and fourth sides;
A first chamfered inclined surface provided at an end of the first side
And a second side provided at an end of the flat surface on the second side.
The two chamfered inclined surfaces enable the slider and the magnetic field generating portion to be closer to the raised portion on the outer periphery of the magneto-optical disk.

In the magneto-optical disk drive of the third and fourth aspects, the slider is provided on the outer circumference of the magneto-optical disk.
When moving toward the rising side , the slider
The top moves closest to the swell, and moves
The magnetic field generating part located on the axis is
Can be approached.

In the magneto-optical disk drive of the fifth and sixth aspects , the slider is provided on the outer circumference of the magneto-optical disk.
Ri to motions toward the up side, the Moriaga
Any of the third and fourth sides approaching while facing the
Round surface or chamfered shape provided at the lower end of either side
Is the inclined surface receding contact position relative to the raised part, to expand the amount of movement in the raised portion.

[0035]

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

FIG. 1 is an exploded perspective view of the magneto-optical disk drive device 1 of the first embodiment, and FIGS. 2 and 3 are plan views of main parts.

The magneto-optical disk drive 1 has an outermost periphery.
Magneto-optical disk 101 having raised portions 106
A disk rotation driving mechanism 2 causes rotation of the magneto-optical de
The optical disk is disposed on one of the disk surfaces of the
Optical pickup device 3 for recording and reproducing information signals by condensing a laser beam on magnetic disk 101
And the optical pickup device 3 placed thereon, and the laser
Together with the optical pickup device 3 so that the beam condensing part moves in the radial direction of the magneto-optical disk 101.
A carriage 4 that moves, with full lecture 5 provided on the carriage 4, wherein said magneto-optical disc 101
So that it is arranged on the board side opposite to the one board side
A slider 6 attached to the tip of the flexure 4,
The slider 6 is set at a position above the movement axis.
And apply an external magnetic field to the condensing part of the laser beam.
And a magnetic field generating unit 7 that generates the magnetic field. The slider 6
Is a focusing part of the laser beam as shown in FIG.
First and second sides 6a, 6b substantially parallel to the movement axis of
And third and fourth directions intersecting the moving axis line.
Sides 6c and 6d, and are substantially parallel to the movement axis.
The first side 6a moves more than the second side 6b.
It is attached at a position near the axis (L ₁ <L ₂ ).

The slider 6 has a substantially rectangular shape (substantially rectangular parallelepiped).
Shape) .

The slider 6 is mounted on the magneto-optical disk 1
When moving toward the bulge of the outer circumference of 01
In such a case, the slide approaching while approaching the raised portion
The third side 6c of the rider is formed in an arc surface.
The central part is located on the inner peripheral side of the
Is also approaching.

The third side 6c corresponds to the raised portion 1
Diameter at than the radius R ₁ of 06, and is formed into an arc surface of a radius of curvature R ₂ that center of rotation of the magneto-optical disk 101.

[0041] The magneto-optical disk 101, as described with reference to FIGS. 13 14, a substrate 102, a dielectric film 103
, The recording film 104 and the protective film 105, and are housed in the disk cartridge 121 as shown in FIG.

[0042] The disc rotation driving mechanism 2, a spindle motor (not shown), and is from the turntable 12 which is attached to the spindle shaft 11 of the spindle motor.

[0043] The turntable 12, be formed in a bottomed cylindrical shape, the upper surface of the cylindrical portion 13 is in surface 14 mounting disk.

[0044] The inside of the cylindrical portion 13 is attached a ring-shaped magnet 15.

[0045] Then, so as to hold the optical disk 101 by suction chucking hub 101a of the magneto-optical disk 101 on the disk mounting surface 14 of the turntable 12 by the magnet 15.

The optical pickup device 3 comprises a movable part 21 and a fixed part 22, as shown in FIG.

The movable part 21 includes the objective lens 23 and the reflecting mirror 2.
4 is provided.

The fixing section 22 has a semiconductor laser 25 and a collimating lens 26.

[0049] Then, the laser beam reflected from the semiconductor laser 25 is changed into parallel light by the collimator lens 26, is reflected by the reflecting mirror 24, passes through the objective lens 23, so as to irradiate the magneto-optical disc 101 Has become.

The movable portion 21 of the optical pickup device 3
Are mounted on the carriage 4.

[0051] As shown in FIG. 1, the carriage 4
Is mounted between the pair of guide rails 31 and 32.

[0052] the linear motor 33, 34 for driving the carriage on both sides of the guide rails 31 and 32 are arranged.

[0053] The linear motor 33 and 34, be constituted by the magnet 35 and the yoke 36 and the drive coils 37 disposed on both sides of the guide rails 31 and 32, the carriage 4 to the movable portion of the optical pickup device 3 21, the flexure 5, the slider 6, and the magnetic field generator 7 are moved in the radial direction of the magneto-optical disk 101.

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

Therefore, when the slider 6 is moved toward the raised portion 106 on the outer periphery of the magneto-optical disk 101 when the information signal is recorded on the magneto-optical disk 101,
The slider 6 moves until the central portion of the third side 6c is closest to the raised portion 106, and the one end 1 of the second side 116b of the conventional slider 116 shown in FIG.
This makes it possible to enlarge the recording area of the magneto-optical disk 101 as compared with a magneto-optical disk drive device in which 16b ' is closest to the raised portion 106.

FIG. 5 shows a second embodiment of the present invention.

In this embodiment, the slider 6
The third side 6c is a direction orthogonal to the moving axis line at the center.
And a flat surface 6e of the first side 6a of the flat surface 6e
A first chamfered inclined surface 6f on the side and the flat surface 6
e and a second chamfered inclined surface 6g on the second side 6b side .

Since the magneto-optical disk drive device of the second embodiment has the above-described configuration, when the slider 6 moves toward the raised portion 106 on the outer periphery of the magneto-optical disk 105, the slider 6 becomes flat. Surface 6e
The edge portion 6h at the boundary of the second chamfered inclined surface 6g moves until it comes closest to the raised portion 106, and FIG.
The recording area of the magneto-optical disk 101 can be enlarged as compared with the conventional magneto-optical disk drive shown in FIG.

FIG. 6 shows a third embodiment of the present invention.

In this embodiment, the third of the slider 6
The side 6c is defined as a top 6i at a position on the movement axis , and a first side 6c formed from the top 6i toward the first side 6a .
The second chamfer-shaped inclined surface and the chamfered shape of the inclined surfaces 6j, from the top 6i formed toward the second side 6b side of the 6
k.

The first and second chamfered inclined surfaces 6j,
6k is formed on a flat surface (flat surface).

[0062] magneto-optical disk drive apparatus of the third embodiment, since a configuration as described above, when the slider 6 is moved toward the outer periphery of the raised portion 106 of the magneto-optical disk 105, the slider 6, the First and second
The top 6i between the chamfered inclined surfaces 6j and 6k moves until it comes closest to the raised portion 106, and the top 6i is moved.
The magnetic field generating section 7 provided in the vicinity of the magnetic disk 101 can be made closer to the raised section 106 to enlarge the recording area of the magneto-optical disk 101.

In FIG. 6, the first side 6
Although the case where the first chamfered inclined surface 6j is formed toward the side a and the second chamfered inclined surface 6k is formed toward the second side 6b, at least the first chamfered inclined surface 6j is shown. Side
What is necessary is just to form the 1st chamfered inclined surface 6j toward 6a side.

FIG. 7 shows a fourth embodiment of the present invention.

In this embodiment, the first and second surfaces are
The take-like inclined surfaces 6j and 6k are formed as curved surfaces (curved surfaces).

The other configuration is the same as that of the third embodiment, and the operation and effect are the same as those of the third embodiment, and therefore, the duplicated description will be omitted. .

Although not shown, the first and second
One of the chamfered inclined surfaces 6j and 6k may be formed as a flat surface, and the other may be formed as a curved surface.

FIGS. 8 and 9 show a fifth embodiment of the present invention.

In this embodiment, the third
The lower end of the side 6c is a round surface 6l.

[0070] the radius R ₃ of the curved surface 6l is formed smaller in diameter than the radius R ₄ of the rising surface of the platter <br/> up unit 106.

[0071] Therefore, when the slider 6 is moved toward the raised portion 106, by the curved surface 6l, the moving amount of the slider 6 is expanded, thereby expanding the recording area to that amount magneto-optical disc 101 You can do it.

FIGS. 10 to 11 show a sixth embodiment of the present invention.

In this embodiment, the third slider 6
The lower end of the side 6c is a beveled inclined surface 6m.

The other structures, operations and effects are substantially the same as those of the fifth embodiment.

The slider 6 can be formed in various types as shown in FIG. 12 by combining the first to sixth embodiments in addition to the sliders shown in the first to sixth embodiments. It is possible.

When reading an information signal from the magneto-optical disk 101, the slider 6 is lifted from the magneto-optical disk by the head lifting mechanism.

In FIG. 1, reference numeral 41 denotes a cartridge holder. When the disk cartridge 121 is inserted into the cartridge holder 41, the shutter 122 of the disk cartridge 121 is automatically opened,
It is designed to be loaded toward the turntable.

[0078]

According to the magneto-optical disk drive of the present invention, the magnetic field generating portion can be moved closer to the raised portion of the protective film of the magneto-optical disk. Therefore, the recording area of the magneto-optical disk can be enlarged accordingly. There is an effect that can be.

[Brief description of the drawings]

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

FIG. 2 is a plan view of a main part of the first embodiment.

FIG. 3 is a plan view of a main part of the first embodiment.

FIG. 4 is a schematic sectional view of an optical pickup device.

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

FIG. 6 is a plan view of a main part of a third embodiment.

FIG. 7 is a plan view of a main part of a fourth embodiment.

FIG. 8 is a sectional view of a main part of a fifth embodiment.

FIG. 9 is an enlarged view of a main part of the fifth embodiment.

FIG. 10 is a sectional view of a main part of a sixth embodiment.

FIG. 11 is an enlarged view of a main part of the sixth embodiment.

FIG. 12 is a table showing combinations of the embodiments.

FIG. 13 is a sectional view of a magneto-optical disk.

FIG. 14 is a partially enlarged sectional view of a magneto-optical disk.

FIG. 15 is a perspective view of a conventional magneto-optical disk drive.

FIG. 16 is a plan view showing a conventional problem.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magneto-optical disk drive device 2 ... Disk rotation drive device 3 ... Optical pickup device 4 ... Carriage 6 ... Slider 6a ... 1st side 6b ... 2nd side 6c ... 3rd side 6d ... 4th side 7 ... Magnetic field generation unit 101: magneto-optical disk 105: protective film 106: raised portion of protective film

Continuation of front page (56) References JP-A-3-292652 (JP, A) JP-A-63-197016 (JP, A) JP-A-5-8769 (JP, U) (58) Fields studied (Int .Cl. ⁷ , DB name) G11B 11/105 G11B 21/16-21/26

Claims (6)

(57) [Claims] 1. A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion at the outermost periphery, and a disk rotation drive mechanism disposed on one of the surfaces of the magneto- optical disk,
An optical pickup device for recording and reproducing an information signal by condensing a laser beam on the magneto-optical disk; and mounting the optical pickup device on the laser beam.
The carry <br/> Tsu di condensing portion of the arm is moved together with the optical pickup device to move in a radial direction of the magneto-optical disk, a full lecture provided on the carriage, condensing the laser beam Substantially parallel to the axis of movement of the part
Which intersects the first and second sides with respect to the movement axis
And third and fourth sides oriented in the same direction.
The parallel first side is more movable axis than the second side.
With the eccentric position near the line, the magneto-optical disk
Will be arranged on the board side opposite to the one board side.
A slider having a substantially rectangular shape attached to the tip of the flexure, and provided on the slider at a position above the movement axis.
It is a magnetic field generator for applying an external magnetic field to the condensing section of the laser beam, a magneto-optical disk drive apparatus having a Moriaga the slider of the outer periphery of the magneto-optical disk
When it is moved toward the
The third and fourth of the slider approaching while facing
One of the sides is the outer periphery of the magneto-optical disk.
Concentric with the bulge and smaller than the bulge
A magneto-optical disk drive device formed on an arc surface having a small curvature . 2. A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion at the outermost periphery, and a disk rotation drive mechanism disposed on one of the surfaces of the magneto- optical disk,
An optical pickup device for recording and reproducing information signals by focusing a laser beam for the optical disk, and placing the optical pickup device, the laser Bee
The carry <br/> Tsu di condensing portion of the arm is moved together with the optical pickup device to move in a radial direction of the magneto-optical disk, a full lecture provided on the carriage, condensing the laser beam Substantially parallel to the axis of movement of the part
Which intersects the first and second sides with respect to the movement axis
And third and fourth sides oriented in the same direction.
The parallel first side is more movable axis than the second side.
With the eccentric position near the line, the magneto-optical disk
Will be arranged on the board side opposite to the one board side.
A slider having a substantially rectangular shape attached to the tip of the flexure, and provided on the slider at a position above the movement axis.
It is a magnetic field generator for applying an external magnetic field to the condensing section of the laser beam, a magneto-optical disk drive apparatus having a Moriaga the slider of the outer periphery of the magneto-optical disk
When it is moved toward the
The third and fourth of the slider approaching while facing
One of the sides is orthogonal to the movement axis.
And the first side of the flat surface
A first chamfered inclined surface provided at an end of the
A second chamfer provided at the end of the rat surface on the second side.
A magneto-optical disk drive device comprising: 3. A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion at the outermost periphery, and a disk rotation drive mechanism disposed on one of the disk surfaces of the magneto- optical disk,
An optical pickup device for recording and reproducing an information signal by condensing a laser beam on the magneto-optical disk; and mounting the optical pickup device on the laser beam.
The carry <br/> Tsu di condensing portion of the beam is you move together with the optical pickup device to move in a radial direction of the magneto-optical disk, a full lecture provided on said carriage, said laser beam focusing Substantially parallel to the axis of movement of the optical unit
Which intersects the first and second sides with respect to the movement axis
And third and fourth sides oriented in the same direction.
The parallel first side is more movable axis than the second side.
With the eccentric position near the line, the magneto-optical disk
Will be arranged on the board side opposite to the one board side.
A slider having a substantially rectangular shape attached to the tip of the flexure, and provided on the slider at a position above the movement axis.
Is the a magneto-optical disk drive apparatus having a magnetic field generator for applying an external magnetic field to the condensing section of the laser beam, and the slider is moved toward the raised portion of the outer periphery of the magneto-optical disk when the pair to the raised portion
One of the third and fourth sides approaching while facing
Is arranged on the movement axis and the swelling is
On the first side with the top closest to the ridge
A first chamfered inclined surface and a flat surface
And a second chamfered inclined surface provided on the side 2
A magneto-optical disk drive device characterized in that: 4. The magnetic disk drive device according to claim 3, wherein the first and second chamfered inclined surfaces are formed as curved surfaces. 5. A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion at the outermost periphery, and a disk rotation drive mechanism disposed on one of the surfaces of the magneto- optical disk,
An optical pickup device for recording and reproducing an information signal by condensing a laser beam on the magneto-optical disk; and mounting the optical pickup device on the laser beam.
The carry <br/> Tsu di condensing portion of the arm is moved together with the optical pickup device to move in a radial direction of the magneto-optical disk, a full lecture provided on the carriage, condensing the laser beam Substantially parallel to the axis of movement of the part
Which intersects the first and second sides with respect to the movement axis
And third and fourth sides oriented in the same direction.
The parallel first side is more movable axis than the second side.
With the eccentric position near the line, the magneto-optical disk
Will be arranged on the board side opposite to the one board side.
A slider having a substantially rectangular shape attached to the tip of the flexure, and provided on the slider at a position above the movement axis.
Is the a magneto-optical disk drive apparatus having a magnetic field generator for applying an external magnetic field to the condensing section of the laser beam, and the slider is moved toward the raised portion of the outer periphery of the magneto-optical disk when the pair to the raised portion
One of the third and fourth sides approaching while facing
A magneto-optical disk drive device characterized in that the lower end of the side is formed on a round surface. 6. A disk rotation drive mechanism for rotating a magneto-optical disk having a raised portion at the outermost periphery, and a disk rotation driving mechanism disposed on one of the disk surfaces of the magneto- optical disk,
An optical pickup device for recording and reproducing an information signal by condensing a laser beam on the magneto-optical disk; and mounting the optical pickup device on the laser beam.
The carry <br/> Tsu di condensing portion of the arm is moved together with the optical pickup device to move in a radial direction of the magneto-optical disk, a full lecture provided on the carriage, condensing the laser beam Substantially parallel to the axis of movement of the part
Which intersects the first and second sides with respect to the movement axis
And third and fourth sides oriented in the same direction.
The parallel first side is more movable axis than the second side.
With the eccentric position near the line, the magneto-optical disk
Will be arranged on the board side opposite to the one board side.
A slider having a substantially rectangular shape attached to the tip of the flexure, and provided on the slider at a position above the movement axis.
Is the a magneto-optical disk drive apparatus having a magnetic field generator for applying an external magnetic field to the condensing section of the laser beam, and the slider is moved toward the raised portion of the outer periphery of the magneto-optical disk when the pair to the raised portion
One of the third and fourth sides approaching while facing
Wherein the lower end of the side is formed as a chamfered inclined surface .