JP2584036Y2 - Magneto-optical disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk drive, and more particularly to an adjusting structure for adjusting the position of a head constituting the drive.

[0002]

2. Description of the Related Art For example, in a magneto-optical disk apparatus capable of repeatedly recording information on a magneto-optical disk, a bias magnetic field generator (magnetic head) is provided on one side of a loaded magneto-optical disk toward its recording layer. ), A high-power laser beam emitted from the optical head is continuously converged, and the temperature of the recording layer of the magneto-optical disk is raised to the Curie temperature to maintain the recording layer. After the magnetic force is lost, the magnetization direction of the recording layer becomes the same direction as the bias magnetic field for initialization during the cooling process. Converge,
Thereby, information is recorded by reversing the direction of magnetization.

In the magneto-optical disk device having such a structure, in order to rewrite information of one track, it is necessary to rotate the magneto-optical disk for erasing and recording, respectively, which is disadvantageous in that the recording speed is low. Therefore, recently, by selectively applying a magnetic field of either S or N to a minute region corresponding to a region where laser light is converged, information can be rewritten only by rotating the disk once. A magneto-optical disk device of a modulation overwrite type has been proposed.

In such a magneto-optical disk drive of the magnetic field modulation overwrite type, it is necessary to apply a high-speed modulated magnetic field to the magneto-optical disk in order to realize rapid overwriting. In addition, it is necessary to reduce the size of the magnetic head and make it as close to the disk recording layer as possible. At the same time, it is considered that the magnetic head, which is the bias magnetic field generator, needs to be moved together with the optical head moving on one side of the magneto-optical disk. In this case, the upper and lower positions of the optical head moving on one side of the magneto-optical disk and the magnetic head moving on the other side of the magneto-optical disk are made to coincide with each other so that the disk recording layer to be recorded is positioned from above and below. It is considered that a configuration that accurately supplies a magnetic field and laser light is required.

For this reason, the vertical position of the optical head moving on one side of the magneto-optical disk and the magnetic head moving on the other side sandwiching the magneto-optical disk can be easily and accurately matched, for example, during manufacturing or maintenance. There is a demand for a magneto-optical disk drive having a configuration capable of performing the above operation.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on such a problem awareness, and is an optical head which can easily and accurately adjust the vertical position of a magnetic head and an optical head across a magneto-optical disk. It is intended to provide a magnetic disk drive.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a linear motor mechanism for an optical head for driving an optical head carriage provided with an optical head on one side of a magneto-optical disk in the radial direction of the disk; A linear motor mechanism for a magnetic head for driving the provided magnetic head carriage on the other side of the magneto-optical disk in the radial direction of the disk; the relative positions of the two head carriages respectively provided on the optical head carriage and the magnetic head carriage; A pair of position detection sensors for detecting; a magnetic head base provided on the apparatus main body so as to be able to contact and separate from the magneto-optical disk on the other side of the magneto-optical disk; and a magnetic head for supporting a magnetic head carriage Base plate to be fixed to the base; above and below the magneto-optical disk First position adjusting means for adjusting the position of the magnetic head carriage with respect to the base plate so that the moving directions of the head carriages coincide with each other; Moving the base plate relative to the magnetic head base so that the magnetic head carriage is aligned on the same radius in the same direction, and moving the magnetic head carriage in a direction intersecting the moving direction of the two head carriages matched by the first position adjusting means. A second position adjusting means that enables the position detection sensor on the magnetic head carriage side to move up and down with respect to the magneto-optical disk so that the vertical position of the magnetic head coincides with the vertical position of the optical head. And a third position adjusting means.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 13 is a plan view showing a magneto-optical disk drive 20 of a magnetic field modulation overwrite type to which the present invention is applied, and FIG. 1 is a side view thereof. This magneto-optical disk drive 20
Are arranged along a cartridge holder 22 for holding the disk cartridge 11 loaded with the magneto-optical disk 12, an optical head base 21, and a linear bearing 51 (FIGS. 4 to 6) provided on the optical head base 21. An optical head carriage 23 for moving the optical head 24 in the radial direction of the magneto-optical disk 12;
Has a magnetic head carriage 26 that moves in the radial direction.

A cantilevered load beam 15 is fixed to a back surface of the magnetic head carriage 26 by a fixing screw 69 with its base positioned on the disk rotation center 12a side of the magneto-optical disk 12. A magnetic head 25 having an air-floating slider surface is attached to a free end of the load beam 15 facing the outer peripheral side of the magneto-optical disk 12. The load beam 15 (FIG. 13)
In the removable state shown in FIG.
(FIG. 8 and FIG. 9), it bends downward until it comes into contact with it, and becomes slightly inclined downward. In the recordable / reproducible state (FIG. 3), the load by the load beam 15 and the rotating magneto-optical disk 12 It is stable at a position where the wind pressure is balanced, becomes substantially parallel to the magneto-optical disk 12, and the magnetic head 25
The surface of the magneto-optical disk 12 is brought into close proximity at a very short distance.

The disk cartridge 11 is configured so that the magneto-optical disk 12 can be housed inward, and a head access window 11a (FIGS. 4 to 6, 13) is provided on the upper surface thereof.
And a shutter 54 that can be opened and closed to close and open the head access window 11a.

As shown in FIG. 13, the cartridge holder 22 has a loading switch 80 which is turned on when the disc cartridge 11 is loaded and drives the drive motor 61. The cartridge holder 22 is configured to be movable up and down with respect to the optical head 24 (FIG. 1). The cartridge holder 22 is located away from the optical head 24 when the disk cartridge 11 is attached or detached. By moving in the direction approaching the head 24, the magneto-optical disk 12 can be set at a predetermined position.

Further, on the outer side of the cartridge holder 22, the guide roller 50 provided on the optical head base 21 guides the slide in the directions of arrows A and B in FIG. A guide cam plate 35 is provided. The left and right guide cam plates 35
Are respectively formed at four locations thereof, substantially crank-shaped cam grooves 40 and 42 for the holder, cam grooves 41 for the magnetic head,
43 and a long hole 125. The left and right fixed cam plates 49 are provided outside the guide cam plate 35, and the left and right fixed cam plates 49 are provided on the left and right fixed cam plates 3 respectively.
5 so as to correspond to the holder cam grooves 40 and 42 and the magnetic head cam groove 41.
7, 46 are formed vertically. The left and right fixed cam plates 49 are further bent and formed by being cut and raised toward a guide cam plate 35 located in the middle of the left and right fixed cam plates 49, and penetrated through the elongated hole 125 of the guide cam plate 35. An abutment projection 49a to be projected inside the guide cam plate 35 (FIG. 1)
To FIG. 3). The contact projections 49a regulate the lowering positions of the contact portions 110 on the left and right of the magnetic head base 28 shown in FIG.

As shown in FIG. 1, cam pins 36 and 38 are provided on the left and right sides of the cartridge holder 22 in the disk moving direction, respectively. The cam pins 36 are provided with a holder cam groove 40 and a vertical guide cam. The cam pins 38 are inserted into the grooves 45 and the holder cam grooves 42 and the vertical guide cam grooves 47. Also, cam pins 37, 3 are provided on the left and right side surfaces of the magnetic head base 28, respectively.
The cam pin 37 is inserted into the magnetic head cam groove 41 and the vertical guide cam groove 46, and the cam pin 39 is inserted into the magnetic head cam groove 43.

In the initial position of the guide cam plate 35 shown in FIG.
Unloading sections 40a and 42a for holding the disk cartridge 11 at the unloading position while holding
And the cam pins 36, 38 when the guide cam plate 35 is initially moved.
Moving portions 40b and 42b for guiding the disk cartridge 11 to the loading position and holding the same at the loading position.
have. The holder cam grooves 40, 42 have loading portions 40c, 42c. The loading portions 40c and 42c are formed substantially horizontally, and
The disc cartridge 11 is kept at the loading position by moving the disc cartridges 6 and 38 idly without moving them up and down.

The magnetic head cam grooves 41 and 43 are provided at the initial position of the guide cam plate 35 shown in FIG.
Unloading portions 41a and 43a that hold the magnetic head 25 (magnetic head carriage 26) at the unloading position while holding the 39, and guide the cam pins 37 and 39 during the initial movement of the guide cam plate 35, thereby unloading the magnetic head 25. Moving part 41 to be moved to intermediate step parts 41c and 43c which are intermediate positions between the loading position and the loading position.
b, 43b. Cam groove 41, 4 for magnetic head
Moving parts 41d and 43d for guiding the cam pins 37 and 39 to move the magnetic head 25 to the loading position at the time of movement following the initial movement of the guide cam plate 35;
It has loading portions 41e and 43e for holding the cam pins 37 and 39 and holding the magnetic head 25 at the loading position.

A rack plate 59 and a switch operation plate 60 are fixed to the guide cam plate 35, as shown in FIG. The apparatus main body is provided with a drive motor 61 and a gear box 62 for transmitting the rotation of the drive motor 61. The rotation of the drive motor 61 is controlled by the pinion gear 6.
3 is transmitted to the rack plate 59 as a linear motion.
The drive motor 61 is driven to rotate normally based on a loading switch 80 which is turned on when the disc cartridge 11 is loaded into the cartridge holder 22 and pressed in the loading direction.

The apparatus main body includes first, second, and third detection switches 65, 66, and 6 corresponding to the switch operation plate 60.
7 are provided. These detection switches 65, 6
6, 67 are switch levers 65a, 66a, respectively.
67a. Detection switches 65, 66, 67
Is a switch operation plate 60 that moves together with the guide cam plate 35.
The switch levers 65a, 66a, 67a are pressed or released to turn on or off. Based on this, the position of the guide cam plate 35 is detected. By this detection, it is possible to detect which state the disk cartridge 11 and the magnetic head base 28 are currently in.

That is, in the switch operation plate 60, the first detection switch 65 is turned off and the second detection switch 66 and the third detection switch 67 are turned on in the state of FIG. The third detection switch 67 and the third detection switch 67 are turned off and the second detection switch 66 is turned on. In the state of FIG. 3, the first detection switch 65 is turned on and the second detection switch 66 and the third detection switch 66 are turned on. The detection switch 67 is off.

By inputting these different bit signals to the state discriminating means 10 (FIG. 13), the magneto-optical disk device 20 is brought into a detachable state, a reproducible state and a recording / reproducing state.
It is possible to determine which of the reproducible states is in. The detachable state is a state in which both the magnetic head 25 and the disk cartridge 11 are at the unloading position and the disk cartridge 11 can be detached, as shown in FIGS. In the reproducible state, as shown in FIGS. 2 and 5, the disk cartridge 11 is located at the loading position and the magnetic head 25 is at an intermediate position between the unloading position and the loading position.
The reproduction using only the optical head 24 is possible. The recordable / reproducible state is a state where the magnetic head 25 is located at the loading position together with the disk cartridge 11, as shown in FIGS.

The magneto-optical disk 12 that can be used in the magneto-optical disk device 20 of the present embodiment includes an international standard (ISO) double-sided disk and a disk dedicated to the disk device 20 (non-ISO).
There is a single-sided disc. Of these discs, an optical code signal for disc discrimination cannot be newly written on an international standard double-sided disc. However, this optical code signal is written on a single-sided disc dedicated to the magneto-optical disc device 20, for example. It is possible to write on the control track on the inner circumference side. The optical code signal indicating whether the disc is a double-sided disc or a single-sided disc is discriminated by the optical head 24 in the state shown in FIG. 2 in which the disk cartridge 11 is at the loading position and the magnetic head 25 is waiting at the intermediate position. It is read by the means 68 (FIG. 13). Therefore, when the optical code signal is read, the disc discriminating means 68 judges that the loaded magneto-optical disc 12 is for one side. Based on this, the drive motor 61 is driven to rotate forward and the guide cam plate 35
Is further moved in the same direction, and thereby the magnetic head 25 is moved.
Is moved to the loading position, and reading and recording are enabled. In the state shown in FIG. 2, if no optical code signal is read by the disk discriminating means 68, it is determined that the loaded magneto-optical disk 12 is for both sides. In this case, the drive motor 61 is not driven,
Since the guide cam plate 35 is not moved any more, the magneto-optical disk device 20 is in a state where only reading by the optical head 24 is possible.

Here, the configurations of the optical head linear motor mechanism 127 for transferring the optical head 24 and the magnetic head linear motor mechanism 91 for transferring the magnetic head 25 will be described.

First, the optical head carriage 23 that supports the optical head 24 is movably supported along the radial direction of the magneto-optical disk 12 via a linear bearing 51, as shown in FIGS. I have. The optical head carriage 23 includes a coil 52 fixed to both ends thereof and a yoke 5
3b is movably fitted. The yoke 53b is connected to a permanent magnet 53a located at the center of the yoke 53b.
3, the yoke 53b and the permanent magnet 5
An optical head linear motor mechanism 127 is constituted by 3a and the coil 52.

The linear bearing 51 includes a fixing member 71,
It is composed of a linear slider 72 and a ball 73 interposed between the fixed member 71 and the linear slider 72, and is integrally assembled before the position adjustment of the optical head 24 described later. The fixed member 71 is a substantially U-shaped and elongated member attached to the optical head base 21 side. The linear slider 72 is attached to the optical head carriage 23 side, and It is a member which is narrower, formed in a substantially U-shape and longer. Rolling grooves are formed on opposing side surfaces of the fixed member 71 and the linear slider 72, and a ball 73 is fitted between the opposing rolling grooves.

The optical head 24 transmits the light beam from the laser light source to the magneto-optical disk 12 by the objective lens 8 (FIG. 1).
During reproduction, the reflected light from the magneto-optical disk 12 is received to read the magneto-optical recording signal. At the time of recording, the laser light is converged on the magneto-optical disk 12 with a larger power than during reproduction to reduce the temperature of the recording layer. The temperature is raised to the Curie temperature, and information is overwritten on the recording layer in cooperation with the magnetic head 25.

On the other hand, a magnetic head carriage 26 supporting the magnetic head 25 is provided with a linear bearing 5 mounted on a magnetic head base 28 via a base plate 87.
5 supports the magneto-optical disk 12 so as to be movable in the radial direction. The magnetic head carriage 26 has coils 56 fixed to both ends thereof movably fitted to a yoke 57b. The yoke 57b forms a magnetic circuit 57 with a permanent magnet 57a located at the center of the yoke 57b. The yoke 57b, the permanent magnet 57a and the coil 56 form a linear motor mechanism 91 for a magnetic head.

The linear bearing 55 includes a fixing member 75,
It is composed of a linear slider 76 and a ball 77 interposed between the fixed member 75 and the linear slider 76, and is assembled beforehand before the position adjustment of the magnetic head 25 described later. The fixing member 75 is a substantially U-shaped and elongated member attached to the base plate 87 side, and the linear slider 76 is attached to the magnetic head carriage 26 side, and compared to the fixing member 75. It is a member that is narrow, approximately U-shaped and long. Rolling grooves are formed on opposing side surfaces of the fixed member 75 and the linear slider 76, and a ball 77 is fitted between the opposing rolling grooves.

As shown in FIG. 1, at the end of the magnetic head carriage 26, two sets of reflection type photo sensors (photo interrupters) 3 having both light emitting / receiving elements are provided.
0 and 31 are provided via the sensor mount 152. At the end of the reflector holding portion 27 extending in the moving direction of the optical head carriage 23, a reflector 32 constituting a pair of position detection sensors with the above-mentioned reflective photosensors 30 and 31 is provided. Now, in the state of FIG. 3, both head carriages 23 and 26 are
When the outputs from the two light receiving elements of 0 and 31 are equal, the positions of the two heads 24 and 25 are set to match. Further, the optical head carriage 23 is driven in the radial direction of the magneto-optical disk 12 by an optical head linear motor mechanism 127 based on a signal from a control device (not shown), and the magnetic head carriage 26 is driven by a synchronous drive unit 151 (see FIG. The position control drive is performed by the magnetic motor linear motor mechanism 91 based on the signal from 13) so that the outputs from the two light receiving elements become equal. This allows
Move the magnetic head carriage 26 to the optical head carriage 23
Can be moved synchronously.

The sensor mounting table 152 includes a fixing screw 15
0 (FIGS. 7 and 13), the screw is fixed to the magnetic head carriage 26. When the fixing screw 150 is loosened, the magnetic head carriage 26 is moved in the longitudinal direction (radial direction of the magneto-optical disk 12). be able to. A positioning slot 160 provided at the end of the sensor mounting base 152, the fixing screw 150, and the magnetic head carriage 26 and extending along the longitudinal direction of the linear bearing 55, through which the fixing screw 150 is inserted (see FIGS. 9)
Constitutes a third position adjusting means.

The third position adjusting means is a magneto-optical disk 1
The magnetic head 25 and the optical head 2
The upper and lower positions of 4 can be matched in a mutually detectable state by the reflection type photosensor 30 (31), which is a pair of position detection sensors, and the reflection plate 32. That is, the positions of the position detection sensors 30 and 31 on the magnetic head 25 side with respect to the magnetic head carriage 26 can be adjusted, and the relative positions of the two heads 24 and 25 within the movement direction area of the two head carriages 23 and 26 can be matched. it can.
The adjustment work is adjusted to the optimum position by repeatedly performing the adjustment step of the second position adjustment means.

On the other hand, as shown in FIG. 7, the magnetic head base 28 is formed in a substantially rectangular shape in plan view, and has the abutment portions 110 on the left and right in the rear of the magneto-optical disk 12 in the loading direction. doing. The magnetic head base 28 further has a positioning portion 97 having positioning holes 97a at both front ends thereof, and a rectangular base plate 8 at the center.
Positioning opening 112 formed in a rectangular shape slightly smaller than 7
(FIG. 8). The lower surface of the positioning portion 97 is provided with a stopper pin 9 erected on the optical head base 21 of the apparatus main body.
Abutting surface 97 that abuts the zero regulating surface 90a (FIGS. 1 to 3).
b. The regulating surface 90a of the stopper pin 90
And the abutment projection 49a constitute stopper means for regulating the maximum proximity position of the magnetic head base 28 to the magneto-optical disk 12.

Preload plates 93 are attached to both right and left ends of the magnetic head base 28 in the disk loading direction. The preload plate 93 has the above-mentioned cam pins 37 and 39 on one side, and has a bent locking claw 93a on the other side.
Have studs 95 to pass through through holes (not shown) formed near both ends.

The locking claws 93a are protruded upward from the left and right sides of the magnetic head base 28 near the insertion holes 111 through which the studs 95 are inserted so as to lock the upper surface of the magnetic head base 28. Projection hole 96
Are formed. As shown in FIG. 4, a locking claw 93a is inserted through
After the stud 95 is inserted through the insertion hole 111, the preload leaf spring 94 is set as shown in FIG. The stud 95 and the preload leaf spring 94 are connected by engaging an E-ring or the like at the upper part. The preload leaf spring 94 is configured to be long as shown in FIG. 7 in plan view, and has positioning projections 94a protruding toward one side at both ends. As shown in FIG. 1 when viewed from the side, the preload leaf spring 94 is formed with a mountain shape near both ends in the longitudinal direction. Therefore, as shown in FIG.
The preload plate 9 is provided on both sides of the magnetic head base 28.
In a state where the preload plate spring 3 and the preload plate 94 are set, the preload plate 93 is always urged in the same direction together with the cam pins 37 and 39 by the upward urging force received via the stud 95.

As shown in FIG. 11, the base plate 87 has two rectangular openings 87a formed so as to be orthogonal to a line connecting the guide notches 99 at both ends, and between the two rectangular openings 87a. Further, a positioning fixing portion 113 for fixing the fixing member 75 of the linear bearing 55 is provided. The fixing member 75 has two screw holes 75a (FIG. 11) formed along the longitudinal direction, and the positioning and fixing portion 113 corresponds to the two screw holes 75a in the longitudinal direction. It has two position adjustment holes 113a (FIG. 12). The position adjusting hole 113a is formed so as to be smaller than the head of the fixing screw 103 to be inserted and larger than the male screw portion of the fixing screw 103. Two position adjusting holes 113a formed in the base plate 87,
A first position adjusting means is constituted by the fixing screw 103 to be fixed to the base plate 28 and the fixing screw 103 to be inserted into the position adjusting hole 113a and the screw hole 75a.

In the first position adjusting means, the clearance in the radial direction between the two position adjusting holes 113a and the male screw portion of the fixing screw 103 is the mounting adjustment range of the linear bearing 55. Inside, the position of the linear bearing 55 can be arbitrarily adjusted two-dimensionally. Therefore, according to the first position adjusting means, by adjusting the position of the magnetic head carriage 26 with respect to the base plate 87, the magneto-optical disk 12
The moving directions of the magnetic head carriage 26 with respect to the optical head carriage 23 are made to coincide with each other above and below the head carriage 23, and both head carriages 23, 26 (linear bearings 51, 5) are used.
5) can be aligned in parallel. After the position adjustment (after the so-called parallel operation), the magnetic head carriage 26 (linear bearing 55) is fixed with the fixing screw 103.
Is fixed to the base plate 87. Reference numeral 105 in FIG. 11 denotes a screw hole for screwing a fixing screw, which is used when fixing the linear bearing 51 to the optical head base 21.

As shown in FIGS. 7, 11 and 12, the base plate 87 has, at its four corners, position adjusting holes 98 formed smaller than the head of the fixing screw 101 to be inserted and larger than the male screw. Have. The magnetic head base 28 is provided around the positioning opening 112,
There is a screw hole 120 (FIG. 8) formed so as to correspond to the position adjusting hole 98, into which the fixing screw 101 is screwed. On the left and right of the positioning opening 112 on the upper surface of the magnetic head base 28, rotation restricting guide pins 100 are implanted. The rotation restricting guide pins 100 slidably engage guide notches 99 formed at both right and left ends of the base plate 87, and guide the base plate 87 in the longitudinal direction of the magnetic head base 28. Further, in the state of FIG. 7 in which the two guide notches 99 are engaged with the two rotation control guide pins 100, respectively, between the rotation control guide pin 100 and the inner side of the guide notch 99. The gap s
The positional relationship is set so that it can be performed. The fixing screw 101, the position adjusting hole 98, the guide notch 99, and the rotation regulating guide pin 100 constitute a second position adjusting means.

The second position adjusting means is a magneto-optical disk 1
The two head carriages 23, 2
The base plate 87 is moved in a direction intersecting the moving direction of the two head carriages 23 and 26 matched by the first position adjusting means so as to align the position 6 on the radius of the magneto-optical disk 12 in the same direction. By
The position of the magnetic head carriage 26 with respect to the magnetic head base 28 is adjusted. That is, the second position adjustment means
After the moving directions of the heads 24 and 25 are matched by the first position adjusting means, the moving area of the magnetic head 25 is included in the plane including the moving area of the optical head 24 in the direction perpendicular to the disk surface. , Base plate 8
7 is moved in parallel in a direction intersecting the moving direction of the linear bearing 51 (the radial direction of the magneto-optical disk 12) to adjust the position. The direction in which the base plate 87 can move is defined by the guide pins 100 and the guide grooves 99. In this embodiment, the direction perpendicular to the direction of movement of the linear bearing 51 of the optical head 24, that is, the right side surface of the optical head base 21, The direction is orthogonal to the reference plane. The base plate 87 is provided between the position adjustment holes 98 at the four corners and between the permanent magnets 57a of the magnetic circuit 57.
And a screw hole 102a through which a fixing screw 102 to fix the yoke 57b is inserted.

The present magneto-optical disk drive 2 having the above configuration
0, when the disc cartridge 11 loaded in the cartridge holder 22 is pressed in the loading direction, the loading switch 80 is turned on, and based on this, the drive motor 61 is driven to rotate forward and the guide cam plate 35 is moved to the rack plate 5.
9 is moved from the initial position in FIG.

Then, the disk cartridge 11 which was in the unloading position at the initial position of the guide cam plate 35 (FIGS. 1 and 4) moves its guide pins 36 and 38 up and down with the initial movement of the guide cam plate 35. Cam groove 40,
It is guided by the moving parts 40b, 42b of 42, and descends until its lower surface comes into contact with the upper surface 50a of the guide roller 50 serving as a reference surface provided on the optical head base 21. At this time, similarly to the disk cartridge 11, the magnetic head 25, which was in the unloading position at the initial position of the guide cam plate 35, has its guide pins 37, 39 moved along with the initial movement of the guide cam plate 35. Groove 4
The guide pins 37, 39 are guided by the moving portions 41b, 43b of the first and fourth 43, and are positioned at the intermediate step portions 41c, 43c, and wait at an intermediate position between the unloading position and the loading position (FIGS. 2, 5). .

At this time, the first detection switch 65 and the third detection switch 67 are turned off and the second detection switch 66 is turned on by the switch operation plate 60 which moves together with the guide cam plate 35. The guide cam plate 35 moves the cartridge holder 22 to the loading position by the cam grooves 40, 42 for the holder and moves the magnetic head 25 to the middle position between the unloading position and the loading position by the cam grooves 41, 43 for the magnetic head. Movement is detected. Then, by the optical head 24,
An optical code signal written on the inner peripheral side of the magneto-optical disk 12 is read, and based on the optical code signal, the disk determining means 68 determines that the loaded magneto-optical disk 12 is for one side or for both sides. Is determined.

As a result, if it is determined that the magneto-optical disk 12 is for both sides, the drive motor 61 is not driven, and the guide cam plate 35 is not moved any further. (See FIGS. 2 and 5). On the other hand, the magneto-optical disk 1
2 is determined to be for one side, the drive motor 61
Is driven in the forward direction, whereby the guide cam plate 35 is further moved in the same direction, and the magnetic head 25 is moved to the loading position. 3 and 6).

The above-described first, second and third position adjusting means are assembled to the magneto-optical disk device 20 as follows. First, as shown in FIG. 11, the linear bearing 55 is attached to the back surface of the base plate 87 by screwing the fixing screw 103 penetrating the position adjusting hole 113a into the screw hole 75a of the fixing member 75.
A fixing screw (not shown) is screwed into a screw hole 76a of the linear slider 76 to fix the U-shaped magnetic head carriage 26. Further, the magnetic circuit 57 is provided on the base plate 87.
Is fixed by the fixing screw 102. The magnetic head carriage 26 has a coil 56 to be movably fitted to the yoke 57b on both sides thereof, and a photoreflector 3 on the back surface of one end in the longitudinal direction.
0, 31 and a load beam 1 at the other end in the longitudinal direction.
5 has a magnetic head 25 attached thereto.

Then, the base plate 87 to which each member is attached in this manner is made to correspond to the positioning opening 112, and the guide notch 99 is engaged with the rotation regulating guide pin 100, and inserted into the position adjusting hole 98. The fixing screw 101 is attached to the magnetic head base 28 by screwing it into the screw hole 120. Further, the magnetic head base 28 in this state, the cam pins 37 and 39 are mounted on the left and right sides in the disk loading direction of the apparatus main body, and the magnetic head cam grooves 41 and 43 and the vertical guide cams of the fixed cam plate 49 and the guide cam plate 35. Each is inserted into the groove 46 and attached to the apparatus body.

Then, the position of the magnetic head 25 temporarily fixed to the apparatus main body in this way is adjusted by the first position adjusting means. Linear bearing 51 of optical head 24
Are mounted with the right side surface of the optical head carriage 23 as a reference plane, that is, parallel to the right side surface of the optical head base 21. Therefore, even in the linear bearing 55 of the magnetic head 25, the right side surface of the optical head carriage 23 can be used as a reference plane, and the magnetic head carriage 26 is set in parallel with the reference plane using an apparatus such as an autocollimator. Adjust the position of and fix.

That is, in the adjusting operation by the first position adjusting means, the two fixing screws 103 are loosened, and in this state, the fixing member 75 of the linear bearing 55 is appropriately moved, and a device such as an autocollimator is used. Is performed by moving the magnetic head carriage 26 so as to be parallel to the reference plane of the optical head carriage 23. After this position adjustment, the two fixing screws 103 are tightened to position and fix the fixing member 75 with respect to the magnetic head base 28. Thus, the linear bearing 5 of the optical head 24
1 and the linear bearing 5 of the magnetic head 25.
5 can be matched.

After the completion of the adjusting operation by the first position adjusting means, both carriages 23 and 26 are positioned at their respective moving end points (for example, the outermost end of the magneto-optical disk 12). Further, in this state, the sensor mount 1
The position 52 is moved to a position where both outputs of the reflection type photosensors 30 and 31 are equal by the third position adjusting means and temporarily fixed, and the relative position between the optical head 24 and the magnetic head 25 is roughly adjusted.

In this state, the fixing screw 101 constituting the second position adjusting means is loosened, and the base plate 87 is appropriately moved along the guide notch 99 along the rotation regulating guide pin 100. That is, the magnetic head carriage 26 is appropriately moved in a direction intersecting with the moving direction of the two head carriages 23 and 26 matched by the first position adjusting means, and the two head carriages 23 are vertically positioned with the magneto-optical disk 12 therebetween. , 26 to the magneto-optical disk 1
2 are aligned on the same radius in the same direction. This position can be confirmed by, for example, writing predetermined information on the magneto-optical disk 12 by magnetic field modulation and then reproducing the written information. This checking operation is repeatedly performed while moving and adjusting the base plate 87. , By tightening the fixing screw 101 at the position where the signal at the time of the reproduction becomes maximum,
The base plate 87 is fixed to the magnetic head base 28.

After the position is adjusted by the second position adjusting means, the magneto-optical disk 12 is now adjusted by the third position adjusting means.
The upper and lower positions of the magnetic head 25 and the optical head 24 above and below the position detection sensor (reflection type photo sensor 3)
0, 31, and the reflection plate 32), the relative positions of the reflection type photosensors 30, 31 with respect to the reflection plate 32 are adjusted so as to match each other in the mutually detectable state. That is, the fixing screw 150 is loosened and moved in the positioning slot 160, and prior to this, the operation of reproducing predetermined information written on the magneto-optical disk 12 by magnetic field modulation is repeated, and the sensor mounting table 152 is magnetically moved. The movement is adjusted in the longitudinal direction of the head carriage 26 (in the radial direction of the magnetic disk 12). Then, when the reproduction signal becomes maximum, that is, when the magnetic head 25 and the optical head 24 coincide with each other above and below the magneto-optical disk 12, the fixing screw 150 is tightened, and the optical sensor mounting base 152 is attached to the magnetic head carriage 26. Fix it.

Therefore, according to the magneto-optical disk device 20 of this embodiment, the magnetic head carriage 26 (magnetic head 25) is moved by the first, second and third position adjusting means provided on the magnetic head 25 side. It can be easily moved in different directions and securely fixed in its proper position.

[0049]

As described above, according to the present invention, there is provided a magneto-optical disk drive having a configuration in which the positions of the magnetic head and the optical head can be easily and accurately adjusted above and below the magneto-optical disk. can do.

[Brief description of the drawings]

FIG. 1 is a side view showing a magneto-optical disk device of the present embodiment in a detachable state.

FIG. 2 is a side view showing the magneto-optical disk device of the embodiment in a reproducible state.

FIG. 3 is a side view showing the magneto-optical disk device of the embodiment in a recording / reproducing state.

FIG. 4 is a diagram showing a state in which the magneto-optical disk device of FIG. 1 is viewed from the direction of arrow D in FIG.

5 is a diagram showing the magneto-optical disk device of FIG. 2 as viewed from the direction of arrow E in FIG.

6 is a diagram showing the magneto-optical disk device of FIG. 3 as viewed from the direction of arrow F in FIG.

FIG. 7 is a plan view showing first, second and third position adjusting means, which is a feature of the present invention.

FIG. 8 is a bottom view of the magnetic head base showing the first and second position adjusting means.

FIG. 9 is a bottom view showing a base plate and a linear motor mechanism for a magnetic head attached to the base plate.

10 is a view of the linear motor mechanism for the magnetic head of FIG. 9 as viewed from the direction of arrow G in FIG.

FIG. 11 is a perspective view showing a base plate and a linear bearing attached thereto.

FIG. 12 is a perspective view showing a base plate alone.

FIG. 13 is a plan view showing the entire magneto-optical disk device of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Disk cartridge 12 Magneto-optical disk 20 Magneto-optical disk device 22 Cartridge holder 23 Optical head carriage 24 Optical head 25 Magnetic head 26 Magnetic head carriage 28 Magnetic head base 30 31 Photoreflector 32 Reflector 51 55 Linear bearing 52 56 Coil 53 57 Magnetic Circuit 75 Fixing member 76 Linear slider 75a 102a Screw hole 87 Base plate 90 Linear motor mechanism for optical head 91 Linear motor mechanism for magnetic head 97 Positioning section 99 Notch for guiding 98 Position adjusting hole 99 Notch for guiding 100 Rotation regulating guide pin 101 102 103 Fixing screw 112 Positioning opening 113 Positioning fixing part 113a Position adjusting hole 150 Fixing screw 151 Synchronous driving means 152 Mounting base s Gap

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Isao Okuda 2-36-9 Maeno-cho, Itabashi-ku, Tokyo Asahi Optical Industry Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 11 /Ten

Claims (2)

(57) [Scope of request for utility model registration] An optical head linear motor mechanism for driving an optical head carriage provided with an optical head in the radial direction of a front and back surface of a magneto-optical disk; A linear motor mechanism for a magnetic head driven in the radial direction of the disk on the other side of the disk; a pair of position detection sensors provided on the optical head carriage and the magnetic head carriage, respectively, for detecting a relative position of both head carriages; On the other side of the magneto-optical disk, a magnetic head base provided on the apparatus main body so as to be able to contact and separate from the magneto-optical disk; it is to be fixed to the magnetic head base that supports the magnetic head carriage. Base plate: above and below both head carriers above and below the magneto-optical disk First position adjusting means for adjusting the position of the magnetic head carriage with respect to the base plate so that the moving directions of the carriages coincide with each other; Moving the base plate relative to the magnetic head base so that the magnetic head carriage is aligned on the same radius in the same direction, and moving the magnetic head carriage in a direction intersecting the moving direction of the two head carriages matched by the first position adjusting means. Second position adjusting means for enabling the position detection sensor on the magnetic head carriage side to be aligned with the vertical position of the magnetic head and the optical head above and below the magneto-optical disk. 3. A magneto-optical disk device comprising: a third position adjusting means that can be used. 2. The synchronous drive means according to claim 1, further comprising: a synchronous drive means for synchronously driving the linear motor mechanism for the optical head and the linear motor mechanism for the magnetic head based on the detection of the relative positions of the two head carriages by the pair of position detection sensors. Magneto-optical disk drive having: