JPH0954999A - Magneto-optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of flexible printed circuit boards electrically connected between a carriage and a fixed circuit board. SOLUTION: At least an actuator coil 11 of an objective lens 10 of an optical pickup 13 and a magnetic field modulation head 14, mounted on the carriage are electrically connected to the circuit board 35 fixed in a specific position by one flexible printed circuit board 91.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention irradiates a magneto-optical disk with a laser beam or the like emitted from an optical block of an optical pickup by an objective lens while modulating the magnetic field of the magneto-optical disk by a magnetic field modulation head, The present invention relates to a magneto-optical disk device that records (writes) and reproduces (reads) information on a magneto-optical disk.

[0002]

2. Description of the Related Art Conventionally, there are two types of magneto-optical disk devices of this type: an MO disk drive using a magneto-optical disk having a diameter of 130 mm and the like, and an MD disk drive using a magneto-optical disk having a diameter of 84 mm. . The MO disk drive is configured as shown in FIGS. 5 to 8, and the MD disk drive is configured as shown in FIGS. 9 to 12.

That is, as shown in FIGS. 5 to 8, in the MO disk drive 1, the magneto-optical disk 2 is a cartridge 3
While being accommodated therein, it is inserted into the cartridge holder 5 in the drive body 4, and is drawn into the drive body 4 by this cartridge holder 5 and loaded onto the spindle motor 6.

By this disk loading, the magneto-optical disk 2 is horizontally magnetically chucked on the spindle 7 of the spindle motor 6 and the disk table 8 by the center core 2a thereof, and the magneto-optical disk 2 is stored in the cartridge 3. It is levitated to an intermediate position in the vertical direction.

On the other hand, inside the drive body 4, an optical pickup 13 having an objective lens 10, an actuator coil 11 for driving the objective lens 10 in the focus direction, and an optical block 12 for transmitting and receiving a laser beam to and from the objective lens 10. And the magnetic field modulation head 14 are arranged.

Inside the drive body 4, the magneto-optical disk 2 is guided by a pair of left and right guide shafts 16.
A carriage 17 that is horizontally moved in the directions of the arrows a and b along the radial direction of (i.e., the direction along the radiation from the center of the magneto-optical disk), and that carriage 17 is indicated by the arrow a,
A linear motor 20 including a pair of left and right voice coils 18 that are driven in the b direction and a pair of left and right magnetic circuits 19 that form a closed magnetic circuit by a yoke and a magnet is arranged.

The objective lens 10 of the optical pickup 13 is mounted upward on the carriage 17 via the parallel leaf spring mechanism 21, the actuator coils 11 are mounted on both sides of the objective lens 10, and the optical block 12 is It is fixed in place within the drive body 4.

The rear end portion 17a of the carriage 17 is also
The magnetic field modulation head 14 is mounted on the upper part of the via a suspension 23, and the magnetic field modulation head 14 is arranged above the objective lens 10 so as to face downward.

A pair of left and right voice coils 18 of a linear motor 20 are mounted on both left and right sides of the carriage 17, and a pair of left and right magnetic circuits 19 are fixed at fixed positions in the drive body 4.

Then, as described above, when the magneto-optical disk 2 is loaded on the spindle motor 6,
Through the pair of upper and lower openings 3a formed in the cartridge 3, the lower surface of the magneto-optical disk 2 is brought into close proximity of the objective lens 10 and the upper surface thereof is set at the magnetic field modulation head 14.

After loading the disc,
The spindle motor 6 drives the magneto-optical disk 2 to rotate in the cartridge 3 at a high speed, and the linear motor 20 horizontally moves the carriage 17 in the directions of arrows a and b. The carriage 17 causes the objective lens 10 and the magnetic field modulation head 14 to move. And are moved together in the directions of arrows a and b.

While the magnetic field of the magneto-optical disk 2 is modulated by the magnetic field modulation head 14, the laser beam LB emitted from the optical block 12 of the optical pickup 13 is applied to the magneto-optical disk 2 by the objective lens 10, Information is recorded and reproduced on the magneto-optical disk 2.

In this MO disk drive 1,
Optical block 1 fixed in place in drive body 4
The laser beam LB emitted from the second laser diode 25 is collimator lens 26, beam splitter 27.
The laser beam LB is radiated horizontally to the outside of the optical block 12 through the optical block 12, and the movable galvanometer mirror 28 installed outside the optical block 12 bends the laser beam LB in the horizontal direction by 90 ° to form a light transmission hole in the carriage 17. 29
The internal raising mirror 30 is irradiated horizontally, and its laser beam LB is vertically turned 90 ° by the raising mirror 30.
The objective lens 10 is bent and bent to irradiate the objective lens 10.
Is configured to irradiate the magneto-optical disk 2 with the spot light of the laser beam LB.

Then, the reflected light of the laser beam LB reflected from the magneto-optical disk 2 is returned to the beam splitter 27 of the optical block 12 through the raising mirror 30 and the galvano mirror 29, and is constituted by a phototransistor or the like through a multilens 31. The light sensor 32 for reading and the photodiode 33 for monitoring are configured to receive light.

In the conventional MO disk drive 1, the actuator coil 11, the magnetic field modulation head 14, and the voice coil 18 mounted on the carriage 17.
Movable side electronic components such as the laser diode 25 and the optical sensor 3 in the optical block 12 fixed in place.
2 and the fixed side electronic components such as the photodiode 33 and the like, and the circuit board 35 that is fixed in place in the drive body 4.
They were wired individually for each.

That is, the actuator coil 11 and the voice coil 18 of the movable side electronic components mounted on the carriage 17 are connected to lead wires and extension electric wires 3 respectively.
6 and 37 pull out to the relay point 38 on the carriage 17, and the relay point 38 and the connector 3 of the circuit board 35.
The flexible printed circuit board 40 was used to connect 9 and 9.

Further, the magnetic field modulation head 14 which is a movable side electronic component mounted on the carriage 17 via the suspension 23 is connected to a relay point 42 provided on the base side of the suspension 23 by a lead wire or an extension electric wire 41. The flexible printed board 44 connects the relay point 42 and the connector 43 of the circuit board 35.

Further, the laser diode 25, the optical sensor 32, the photodiode 33, etc., which are the fixed side electronic components in the optical block 12, are connected to the circuit board 35 by another flexible printed board 45.

Further, as shown in FIGS. 9 to 12, the MD disk drive 51 is inserted into the cartridge holder 55 in the drive body 54 with the magneto-optical disk 52 housed in the cartridge 3. The cartridge holder 55 draws the cartridge holder 55 into the drive body 54 and loads it onto the spindle motor 56.

By this disc loading, the magneto-optical disc 52 is horizontally magnetically chucked on the spindle 57 of the spindle motor 56 and the disc table 58, and the magneto-optical disc 52 is positioned at an intermediate vertical position in the cartridge 53. Be surfaced.

On the other hand, inside the drive body 54, an objective lens 60 and an actuator coil 61 for driving the objective lens 60 in the focusing direction and the tracking direction.
And an optical pickup 63 having an optical block 62 for transmitting and receiving a laser beam to and from the objective lens 60.
And the magnetic field modulation head 64 are arranged.

Inside the drive body 64, an arrow is guided along the radial direction of the magneto-optical disk 52 (which means the direction along the radiation from the center of the magneto-optical disk) by being guided by a pair of left and right guide shafts 66. A carriage 67 that is horizontally moved in the a and b directions, a stepping motor 68 that drives the carriage 67 in the a and b directions, a lead screw 69 that is rotationally driven by the stepping motor 68, and a carriage 67 that is attached to the carriage 67 side. And a carriage moving mechanism 71 configured by an engaging portion 70 engaged with the lead screw 69.

Then, the objective lens 60 of the optical pickup 63 is mounted on the carriage 67 in an upward direction by a biaxial actuator (not shown).
The actuator coil 61 is mounted on the outer periphery of the carriage 0, and the optical block 62 is provided on one side of the objective lens 60 so that the carriage 6
It is installed in 7.

The rear end portion 67a of the carriage 67
A magnetic field modulation head 64 is mounted on the upper part of the magnetic field modulation head 64 via a suspension 73, and the magnetic field modulation head 64 is arranged above the objective lens 60 so as to face downward.

Then, as described above, when the magneto-optical disk 52 is loaded on the spindle motor 56, the lower surface of the magneto-optical disk 52 is passed through the pair of upper and lower openings 53a formed in the cartridge 53 to form an objective. The lens 60 is brought into proximity, and the magnetic field modulation head 64 is set on the upper surface of the alligator.

After loading the disc,
The spindle motor 56 drives the magneto-optical disk 52 to rotate in the cartridge 53 at a high speed, and the stepping motor 68 of the carriage moving mechanism 71 horizontally moves the carriage 67 in the directions of arrows a and b. 60 and magnetic field modulation head 64
And are moved together in the directions of arrows a and b.

While the magnetic field of the magneto-optical disk 52 is modulated by the magnetic field modulation head 64, the laser beam LB emitted from the optical block 62 of the optical pickup 63 is applied to the magneto-optical disk 52 by the objective lens 60, Information is recorded and reproduced on the magneto-optical disk 52.

In the MD disk drive 51, the laser beam LB emitted from the laser diode 75 of the optical block 62 mounted on the carriage 67 is transmitted to the grating lens 76, the beam splitter 77, and
The objective lens 60 is irradiated with light through the collimator lens 78 and the rising mirror 79, and the objective lens 60 irradiates the magneto-optical disk 52 with the spot light of the laser beam LB.

Then, the reflected light of the laser beam LB reflected from the magneto-optical disk 52 is passed through a rising mirror 79, a collimator lens 78, a beam splitter 77 and a multi-lens 82, and a reading optical sensor 80 composed of a phototransistor or the like. The monitor photodiode 81 is configured to receive light.

Then, the conventional MD disk drive 51
Then, the magnetic field modulation head 64 mounted on the carriage 67, the actuator coil 67, and the optical block 6
The laser diode 75, the optical sensor 80, the photodiode 81, and the like in 2 are individually wired to the circuit board 83 fixed in place in the drive body 54.

That is, the magnetic field modulation head 64, which is a movable side electronic component mounted on the carriage 67 via the suspension 73, was connected to the connector 85 of the circuit board 83 by the flexible printed board 84.

The laser diode 75, the optical sensor 80, and the photodiode 81, which are other movable electronic components mounted on the carriage 67, are connected to the flexible printed board 86, and the actuator coil 61 is used for a lead wire or extension. The flexible printed circuit board 86 was connected to the flexible printed circuit board 86 by the electric wire 87, and the flexible printed circuit board 86 was connected to the connector 88 of the circuit board 83.

[0033]

Therefore, in any case, the conventional MO disk drive and MD disk drive have the carriage on which the objective lens and the magnetic field modulation head are mounted, and the circuit board fixed at a fixed position. As a flexible connecting means for electrically connecting between the
Two or more flexible printed circuit boards are used.
In the O-disk drive, if the optical block fixed at a fixed position is included, the circuit board is connected with three or more flexible printed boards.

However, in the method of connecting the carriage and the optical block to the fixed circuit board by using a large number of flexible printed boards as described above, the carriage is repeatedly bent as the carriage moves in the directions of arrows a and b. A sufficient space (gap) must be provided between the flexible printed boards so that the flexible printed boards do not interfere with each other.

Therefore, in any of the conventional MO disk drive and MD disk drive, a large space must be taken for wiring a large number of flexible printed boards between the carriage and the fixed circuit board. There is a problem that miniaturization of the MO disk drive and the MD disk drive is hindered.

Further, in the method of connecting the carriage and the optical block to the fixed circuit board by using a large number of flexible printed boards, a large number of connectors are required. There is also a problem that the cost increases due to the increase of

The present invention has been made to solve the above problems, and provides a magneto-optical disk device capable of significantly reducing the number of means for electrically connecting a carriage and a fixed circuit board. It is intended to be provided.

[0038]

In order to achieve the above-mentioned object, a magneto-optical disk apparatus according to the present invention has at least an actuator coil of an objective lens of an optical pickup and a magnetic field modulation head mounted on a carriage. It is electrically connected to a circuit board fixed at a position by one connecting means having flexibility.

In the magneto-optical disk device of the present invention configured as described above, the carriage and the fixed circuit board can be electrically connected by one connecting means.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a magneto-optical disk device to which the present invention is applied will be described below with reference to FIGS. It should be noted that the same reference numerals are given to the same structural portions as those in FIGS.

[Description of First Embodiment] First, a first embodiment applied to an MO disk drive 1 which is an example of a magneto-optical disk device will be described with reference to FIGS. 1 and 2.

In this case, one flexible printed circuit board 91 is used as the flexible connecting means.
The flexible printed board 91 has one base side 91a connected to the connector 92 of the circuit board 35 fixed at a fixed position, and the carriage 17 at the tip side and the optical fixed at the fixed position. Two connection pieces 91b and 9 which are respectively branched and connected to the block 12
It is bifurcated into 1c.

One of the connecting pieces 91b is bent in a substantially U shape along the side of the moving path of the carriage 17 so that the connecting piece 91b can flexibly follow the movement of the carriage 17 in the directions of arrows a and b. The connection piece 91b has a tip portion 91bb fixed to the relay point 93 of the carriage 17 by adhesion, soldering, or the like.

The actuator coil 11 of the objective lens 10 of the optical pickup 13 mounted on the carriage 17, the magnetic field modulation head 14, and the voice coil 18 of the linear motor 20 are connected to the lead wire and the extension electric wire 94, respectively. , 95, 96 by connecting piece 91b
It is connected to the tip 91bb of the above by soldering or a connector.

At this time, the tip portion 91bb of the one connection piece 91b of the flexible printed board 91 is further branched into a plurality of portions, and the tip portion 91bb branched into the plurality is divided into the actuator coil 11, the magnetic field modulation head 14 and the voice. It is also possible to extend to the terminal portion of the coil 18 and directly solder or the like to the terminal portions of the actuator coil 11, the magnetic field modulation head 14 and the voice coil 18.

The other connecting piece 91c is connected to the laser diode 25, the optical sensor 32, the photodiode 33, etc. in the optical block 12 by soldering or the like.

[Description of Second Embodiment] Next, a second embodiment applied to an MD disk drive 51, which is an example of a magneto-optical disk device, will be described with reference to FIGS. 3 and 4.

Also in this case, one flexible printed circuit board 101 is used as the flexible connecting means. The flexible printed circuit board 101 is
Connector 10 on circuit board 35 fixed in place
There is one base side 101 a connected to the optical pickup 2, and the tip side is the optical pickup 62 mounted on the carriage 67.
And the magnetic field modulation head 64 are bifurcated into two connecting pieces 101b and 101c which are respectively branched and connected.

The one connection piece 101b is composed of the laser diode 75 and the optical sensor 8 in the optical block 62.
0, the photodiode 81, etc., respectively, by soldering or the like.

The actuator coil 61 of the optical pickup 62 mounted on the carriage 67 is also connected to one of the connecting pieces 102b by a lead wire or an extension electric wire 103.

The other connection piece 102c extends to the magnetic field modulation head 64 along the suspension 73 and is directly connected to the magnetic field modulation head 64 by soldering or the like.

Although not shown, the flexible printed circuit board 101 has a pair of connecting pieces 101b, 1b.
01c is fixed along the carriage 67, and the intermediate portion 101d between the pair of connecting pieces 101b, 101c and the base end side 101a is connected to the connecting piece 91b shown in FIGS.
In the same manner as described above, the carriage 67 is configured to follow the movement of the carriage 67 in the directions of arrows a and b so that the carriage 67 can be flexibly moved.
It is curved in a U shape along the side of the movement route.

According to the magneto-optical disk device of the present invention configured as described above, in both cases of the first and second embodiments, the carriages 17, 67 and the fixed circuit boards 35, 83 are arranged. The spaces can be electrically connected by one flexible printed circuit board 91, 101 which is one connecting means.

In particular, in the first embodiment shown in FIGS. 1 and 2, the carriage 17 and the optical block 12 fixed at a fixed position are arranged on one flexible printed circuit board with respect to the fixed circuit board 35. It can be electrically connected by 91.

In this way, in particular, one flexible printed circuit board 9 is provided between the carriages 17, 67 which are moved in the directions of the arrows a, b and the fixed circuit boards 35, 83.
In the method of wiring by using No. 1 and No. 101, since there is no problem such as mutual interference between adjacent flexible printed boards, the flexible printed boards 91,
Since the space for the wiring of 101 can be reduced to the minimum, the miniaturization of the MO disk drive 1 and the MD disk drive 51 can be promoted.

Therefore, in either of the first and second embodiments, only one connector 92, 102 connects the carriage 17, 67 and the optical block 12, 62 to the fixed circuit board 35, 83. .

Further, in each of the first and second embodiments, it is necessary to form a large number of wiring patterns on one flexible printed circuit board 91, 101. Almost U along the side
Connecting piece 91b and intermediate portion 101, which are bent and bent in a letter shape
The width of d becomes thicker.

On the other hand, the arrows a, b of the carriages 17, 67
The flexible printed circuit board 91,
The connection piece 91b and the intermediate portion 101d of 101 are repeatedly subjected to bending stress. However, if the width of the connection piece 91b and the intermediate portion 101d is increased, the durability against the bending stress is improved.
The life of 1, 101 can be increased.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments shown in the drawings, and various modifications can be made based on the technical idea of the present invention. .

[0060]

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

According to a first aspect of the present invention, an objective lens of an optical pickup, an actuator coil thereof, and a magnetic field modulation head are mounted on a carriage, and the optical block of the optical pickup is fixed at a fixed position. Since the actuator coil and the magnetic field modulation head of the optical pickup and the fixed circuit board are electrically connected by one connecting means,
The problem of mutual interference between the connecting means can be solved, the space for wiring between the carriage and the circuit board can be reduced to the minimum, and miniaturization of the magneto-optical disk device can be promoted. . Further, since only one connecting means and one connector on the circuit board side are required, the number of these connecting means and connectors can be significantly reduced as compared with the conventional one, and the cost can be reduced by reducing the number of parts and the number of assembling steps. Can be achieved.

According to a second aspect of the present invention, an objective lens of an optical pickup, an actuator coil thereof, and a magnetic field modulation head are mounted on a carriage, and an optical block of the optical pickup is fixed in a fixed position. Since the actuator coil of the optical pickup, the magnetic field modulation head, and the optical block fixed at a fixed position and the fixed circuit board are electrically connected by one connecting means, mutual interference between the connecting means is prevented. The problem can be solved and the space for wiring between the carriage and the circuit board can be reduced to the minimum, and the number of wirings of the connecting means between the carriage and the fixed optical block and the fixed circuit board can be reduced. Can be significantly reduced, and miniaturization of the magneto-optical disk device can be promoted. Further, since only one connecting means and one connector on the circuit board side are required, the number of these connecting means and connectors can be significantly reduced as compared with the conventional one, and the cost can be reduced by reducing the number of parts and the number of assembling steps. Can be achieved.

According to a third aspect of the present invention, in the magneto-optical disk device in which the objective lens of the optical pickup, the actuator coil and the optical block of the optical pickup, and the magnetic field modulation head are mounted on the carriage, the actuator coil of the optical pickup mounted on the carriage. Since the optical block and the magnetic field modulation head and the fixed circuit board are electrically connected by one connecting means, the problem of mutual interference between the connecting means is solved, and the carriage and the circuit board are connected. The space for wiring can be reduced to the minimum, and the miniaturization of the magneto-optical disk device can be promoted. Further, since only one connecting means and one connector on the circuit board side are required, the number of these connecting means and connectors can be significantly reduced as compared with the conventional one, and the cost can be reduced by reducing the number of parts and the number of assembling steps. Can be achieved.

According to a fourth aspect of the present invention, there is flexibility between at least the actuator coil of the optical pickup mounted on the carriage, the voice coil of the linear motor for linearly driving the magnetic field modulation head and the carriage, and the fixed circuit board. Since they are electrically connected by one connecting means, the number of connecting means and connectors for connecting the carriage including the voice coil and the circuit board can be significantly reduced.

According to the fifth and sixth aspects, since one flexible printed circuit board is provided between the carriage and the fixed circuit board, a large number of wiring patterns are formed on this one flexible printed circuit board and the width thereof is formed. By increasing the thickness, the durability of this one flexible printed circuit board against bending stress can be increased. Therefore, it is possible to increase the life of the one flexible printed circuit board to which repeated bending stress is applied as the carriage moves.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part for explaining a wiring method between a carriage and a fixed circuit board in a first embodiment of a magneto-optical disk device to which the present invention is applied.

FIG. 2 is a perspective view showing the details of FIG. 1 in an exploded manner.

FIG. 3 is a perspective view of an essential part for explaining a wiring method between a carriage and a fixed circuit board in a second embodiment of a magneto-optical disk device to which the present invention is applied.

FIG. 4 is a perspective view showing the details of FIG. 3 in an exploded manner.

FIG. 5 is a partially cutaway plan view illustrating an MO disk drive which is an example of a magneto-optical disk device.

6 is a sectional side view of FIG.

FIG. 7 is a perspective view illustrating a conventional wiring method between a carriage and a fixed circuit board in the MO disc drive of the same.

FIG. 8 is a perspective view showing the details of FIG. 7 in an exploded manner.

FIG. 9 is a partially cutaway schematic plan view illustrating an MD disk drive which is an example of a magneto-optical disk device.

10 is a sectional side view of FIG.

FIG. 11 is a perspective view illustrating a conventional wiring method between a carriage and a fixed circuit board in the above MD disk drive.

FIG. 12 is a perspective view showing the details of FIG. 11 in an exploded manner.

[Explanation of symbols]

 1 MO disk drive (magneto-optical disk device) 51 MD disk drive (magneto-optical disk device) 2, 52 magneto-optical disk 10, 60 objective lens 11, 61 actuator coil 12, 62 optical block 13, 63 optical pickup 14, 64 magnetic field Modulation head 17, 67 Carriage 18 Voice coil 19 Magnetic circuit 20 Linear motor 25, 75 Laser diode 32, 80 Optical sensor 33, 81 Monitor photodiode 35, 83 Circuit board 91, 101 Flexible printed board 92, 102 Connector 94, 95 , 96, 103 power supply

Claims (6)

[Claims] 1. An optical block in which a carriage that is moved substantially in the radial direction of a magneto-optical disk and one side surface of the magneto-optical disk are arranged in a crocodile, and an objective lens and its actuator coil are mounted on the carriage. An optical pickup fixed to a fixed position, a magnetic field modulation head mounted on the carriage with the other side surface of the magneto-optical disk disposed on the side, and a circuit board fixed to the fixed position. A magneto-optical disk device, characterized in that the actuator coil of the optical pickup mounted on the magnetic disk and the magnetic field modulation head are electrically connected to the circuit board by one flexible connecting means. 2. An optical block in which a carriage that is moved substantially in the radial direction of a magneto-optical disk and one side surface of the magneto-optical disk are arranged in a crocodile, and an objective lens and its actuator coil are mounted on the carriage. An optical pickup fixed to a fixed position, a magnetic field modulation head mounted on the carriage with the other side surface of the magneto-optical disk disposed on the side, and a circuit board fixed to the fixed position. The actuator coil of the optical pickup mounted on the substrate, the optical block fixed in place, and the magnetic field modulation head are electrically connected to the circuit board by one connecting means having flexibility. Magneto-optical disk device. 3. A carriage that is moved substantially along the radial direction of the magneto-optical disk, and one side surface of the magneto-optical disk is disposed in the armpit, and the objective lens, its actuator coil and the optical block are all mounted on the carriage. The optical pickup, the other side surface of the magneto-optical disk is arranged on the side, and the magnetic field modulation head mounted on the carriage and the circuit board fixed at a fixed position are mounted on the carriage. A magneto-optical disk device characterized in that the actuator coil and optical block of an optical pickup and the magnetic field modulation head are electrically connected to the circuit board by one connecting means having flexibility. 4. Flexibility is provided between at least an actuator coil of the optical pickup mounted on the carriage, the magnetic field modulation head, a voice coil of a linear motor for linearly driving the carriage, and the circuit board. 4. The magneto-optical disk device according to claim 1, 2 or 3, which is electrically connected by one of the connecting means. 5. A distance between the carriage and the circuit board is 1
A flexible printed circuit board is used for wiring, and a wire is provided between the carriage side end of the flexible printed circuit board and at least the actuator coil and the magnetic field modulation head mounted on the carriage. 1 or claim 2
Alternatively, the magneto-optical disk device according to claim 3 or claim 4. 6. A flexible printed circuit board is provided between at least the actuator coil and the magnetic field modulation head mounted on the carriage, and the circuit board.
Alternatively, the magneto-optical disk device according to claim 3 or claim 4.