JPH09265683A - Disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the disk recording and reproducing device capable of being incorporated into a computer main body and copying data of large capacity from a CD-ROM to an MO and hence using multifunctional application by making an FDD(flopy disc drive) and the MO(magneto-optical device) common in use. SOLUTION: A hub Hf of an FD of 3.5 inches and a hub Hh of a magneto- optical disk of HS specification can both be fitted to a turntable T because a fitting ring 6 and a driving pin Pd are movable for this purpose. A carriage 10 is mounted with an optical head A for the magneto-optical disk and a magnetic head B0 on the 0 side for the FD. A slider 21 is mounted with a magnetic field generating part E for magneto-optical recording and a magnetic head part B1 on the side 1 of the FD. The slider 21 is supported by a load beam 32, and a reinforcing spring 33 is provided to increase elastic force of the load beam 32. When the load beam 32 is only used, the slider 21 becomes a floating type to cope with the magneto-optical disk, and when the reinforcing spring 33 is used, the slider 21 is brought into pressurized contact with the disk to cope with the FD.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of loading both a magnetic disk and a magneto-optical disk, capable of recording / reproducing signals on both disks, and has the same central portion of each disk. The present invention relates to a disk recording / reproducing apparatus which can be clamped on a rotary table and whose pressing force can be set according to the type of disk.

[0002]

2. Description of the Related Art A standard storage device installed in a personal computer is a floppy disk drive (FD).
D) and a hard disk drive (HDD) are common, and recently, a CD-ROM device has also been used. On the other hand, the magneto-optical disk unit (MO) has a large storage capacity and allows free rewriting of data.
It is expected to spread in the future.

However, since the above-mentioned FDD, HDD, CD-ROM, etc. are built in the current personal computer, there is currently no space in the computer body for the MO. Recently, a storage device in which a CD-ROM and a MO are commonly used has been developed. By incorporating a storage device that can be used both as a CD-ROM and an MO in a computer body, space efficiency can be improved and further data can be stored. I am trying to diversify my memory.

[0004]

However, in a storage device that also serves as a CD-ROM and an MO, the CD-ROM and the rewritable MO cannot be used at the same time.
-There is no choice but to use FDD for copying a large amount of data stored in ROM. Therefore, the function of the CD-ROM capable of storing a large capacity cannot be fully utilized, and the function of the MO cannot be fully utilized.

The present invention is to solve the above-mentioned conventional problems. By using both FDD and MO, the present invention can be incorporated in a computer main body, and a large amount of data from a CD-ROM can be copied to MO. It is an object of the present invention to provide a disc recording / reproducing apparatus which enables the use of a multifunctional application.

[0006]

DISCLOSURE OF THE INVENTION A disk recording / reproducing apparatus of the present invention comprises a rotary table on which both the center of a magnetic disk and the center of a magneto-optical disk can be mounted, and a carriage which moves along the recording surface of the disk. A magnetic head for irradiating the side 0 of the magnetic disk mounted on the carriage and an optical head for irradiating the magneto-optical disk with light; and a magnetic field applied to the recording surface of the disk facing the optical head with the disk in between. And a magnetic field generator for performing magneto-optical recording together with light from the optical head.

The magnetic disk according to the present invention is, for example, a floppy disk, and a magnetic head for side 0 is provided on the same side as the optical head, and recording and reproduction can be performed on this floppy disk. When a magneto-optical disk is loaded, optical energy from the optical head is applied to the recording surface of the disk, and a magnetic field is applied from the magnetic field generator to the recording surface to record data by magnetic field modulation or optical modulation. To be done. In reproducing data from the magneto-optical disk, optical modulation due to the Kerr effect or Faraday effect is detected using the optical head.

In the above description, assuming that a magnetic head portion for the side 1 of the magnetic disk is provided at a position facing the magnetic head with the disk sandwiched, recording on both side 0 and side 1 of the magnetic disk. Or it can be played back.

In the above, the magnetic field generating section for performing magneto-optical recording and the magnetic head section for the side 1 are mounted on the same slider, and when a magnetic disk is used and when a magneto-optical disk is used. It is possible to provide pressing force switching means for switching the force for pressing the slider in the disk direction.

In this case, since a single slider can be used for both the floating type and the sliding type, the number of sliders can be minimized, and a single slider support mechanism can be used. Further, the switching of the pressing force of the slider to the disk can be easily realized by combining a leaf spring or the like.

Further, the magnetic field generating section for magneto-optical recording and the magnetic head section for the side 1 are mounted on different sliders, and both sliders can be pressed in the disk direction by different forces. . By forming the magneto-optical magnetic field generating section and the side 1 magnetic head section as separate supporting systems, it becomes possible to press each slider in the disk direction with an optimum force.

Also, as shown in FIG. 3B, on the side 0 side of the lower side of the disk, the magnetic head portion B0 for the side 0 for the magnetic disk is placed on the inner circumference side of the disk and the optical head A is used.
Is arranged on the outer peripheral side of the disk, and on the upper side 1 side of the disk, the magnetic head portion B on the side 1 side of the magnetic disk
It is preferable to dispose 1 on the inner peripheral side and the magnetic field generating portion E for the magneto-optical disk on the outer peripheral side. In FIG. 6, the innermost position of the recording area of the magneto-optical disk is Dhi and the outermost position is Dh.
o, the innermost position of the recording area on the side 0 side of the magnetic disk is Dfi “0”, the outermost position is Dfo “0”, and the innermost position of the recording area on the side 1 side is Dfi.
"1" and the outermost peripheral position are indicated by Dfo "1". However, particularly when focusing on the outermost peripheral side, by arranging the heads as shown in FIG. It becomes easy to record / reproduce and erase the entire recording area for both. Further, the optical axis O of the optical head A and the magnetic field generating portion E can be arranged coaxially, and the side 0 magnetic head B0 and the side 1 magnetic head portion B1 can be arranged so as to be offset, so that each head can be effectively placed in a small space. Can be placed in
The entire device can be downsized. That is, in the arrangement as shown in FIG. 3B, the magnetic core of the side 0 side magnetic head B0 located on the outer peripheral side of the magnetic head and the optical axis O of the optical head A can be arranged close to each other. Therefore, the arrangement efficiency of each head is improved. Such a head arrangement is
As shown in FIG. 3 (B), the arrangement is the same when using a single slider and when using different sliders, but an arrangement that is easy to set especially in the case of a single slider arrangement Becomes

However, as shown in FIG. 5, an optical head A for a magneto-optical disk and a magnetic field generating section E are provided on the inner peripheral side, and a side 0 side magnetic head B0 and a side 1 side magnetic head for a magnetic head are provided. The portion B1 may be provided on the outer peripheral side.

Further, on the rotary table, a center pin that can be fitted in both the center of the hub of the magnetic disk and the center of the hub of the magneto-optical disk, and a drive that can be inserted into the drive hole of the hub of the magnetic disk. A structure that has a pin and a fitting ring that can be fitted to the hub of the magneto-optical disk, and that each of the drive pin and the fitting ring can project in the hub direction depending on the type of the disk to be loaded. Can be

For example, by providing an urging member for urging both the drive pin and the fitting ring toward the disk,
Both discs can be mounted. Alternatively, the fitting ring or the drive pin may be projected or retracted by mechanical force, respectively.

In the above means, if the optical head and the magnetic head on the side 0 side are arranged on one side of the disk and only the magnetic head section on the side 1 side of the magnetic disk is provided on the other side, and the magnetic field generating section is omitted, Recording on magnetic disk
In addition to reproduction, recording or reproduction on a write-once type disc such as a phase change type using an optical head becomes possible.
It also becomes possible to reproduce data from an M-type optical disc.

[0017]

FIG. 6 shows a 3.5-inch floppy disk (hereinafter referred to as "FD") among magnetic disks in order to realize a disk recording / reproducing apparatus in which a magnetic disk and a magneto-optical disk can be loaded in common. And the HS standard disc (hereinafter referred to as “HS disc”) of the magneto-optical discs, showing the dimensional relationship of the cartridge and the like.

Ch indicates the outer shape of the HS disk cartridge, and Cf indicates the outer shape of the FD cartridge. Further, Wh indicates a window formed on the HS disk cartridge, and Wf indicates a window formed on the FD cartridge. The hub provided in the center of the HS disk is indicated by Hh, the center hole thereof is indicated by Hh1, the hub provided in the center of the FD is indicated by Hf, the center hole thereof is indicated by Hf1, and the driving hole is indicated by Hf2. However, in FIG. 6, among the hubs Hh of the HS disk, only the protrusion Hh2 having a diameter dh toward the rotary table shown in FIG. 1A is shown, and the hub Hf of the FD is shown in FIG. As shown, only the portion of diameter df required for clamping on the rotary table is shown.

Further, the HS disc is indicated by Dh, the innermost peripheral position of the recording area of the HS disc is indicated by Dhi, and the outermost peripheral position is indicated by Dho. FD is indicated by Df, the innermost circumferential position of the recording area on the side 0 side of the FD is indicated by Dfi “0”, the outermost circumferential position is indicated by Dfo “0”, and the innermost circumferential position of the recording area on the side 1 side of the FD is indicated. Dfi “1”, the outermost position is Df
o It is indicated by "1".

First, looking at the shape of the hub at the center of each disk, the center hole Hh1 of the hub Hh of the HS disk Dh,
The inner diameter (and inscribed circle diameter) of the center hole Hf1 of the hub Hf of the FD is the same, and the drive hole H of the hub Hf for FD is the same.
It can be seen that there is a margin between the drive pin Pd inserted into f2, the outer edge of the raised portion Hh2 of the hub Hh of the HS disk Dh, and the drive pin Pd. Therefore, it is understood that the rotary table can be commonly used for both hubs Hh and Hf.

The window Wf of the FD cartridge is HS
The innermost position Dhi and the outermost position Dho of the recording area of the HS disk appear inside the window Wh of the cartridge of the disk and in the window Wf for FD. Therefore, it can be understood that recording and reproduction on both disks Dh and Df are possible by moving each head in the disk radial direction within the area of the window Wf.

1A and 1B are side views showing the basic structure of a disc recording / reproducing apparatus capable of recording / reproducing on / from the FD and HS discs having the dimensional relationship shown in FIG. 6, and FIG. FIG. 3A is a perspective view of the table, FIG. 3A is a plan view of the slider, and FIG. 3B is a side view showing the positional relationship of the heads.
4 and 5 show another configuration example. The hubs Hh and Hf of both the FD (disc Df) and the HS disc (disc Dh) can be commonly mounted on the rotary table T shown in FIGS. 1 and 2.

In this rotary table T, a table base 2 is fixed to a spindle shaft 1 which is rotationally driven by a motor, and a cylindrical projection 3 having a diameter dh is integrally formed at the center of the table base 2. A magnet (permanent magnet) 4 having a diameter of dh is also provided thereon. A center pin 5 projects from the center of the magnet 4. The center pin 5 is the center hole H of the hub Hh shown in FIG.
The diameter is such that it can be fitted into both h1 and the central hole Hf1 of the hub Hf.

A fitting ring 6 is provided on the outer circumferences of the protrusion 3 and the magnet 4 so as to be slidable in the axial direction, and is biased upward in the drawing by a biasing member 7 such as a coil spring. An urging member 8 formed of a leaf spring is fixed to the lower surface of the table base 2.
The drive pin Pd fixed to the tip of the table base 2
It projects upward from a hole 2a formed in the. As shown in FIG. 6, the drive pin Pd is located outside the fitting ring 6.

FIG. 1A shows an HS disk (disk D).
h) shows a loaded state. The hub Hh of the disk Dh is made of a magnetic material, and the hub Hh is magnetically attracted to the upper surface of the magnet 4. The center pin 5 of the rotary table T is fitted in the center hole Hh1 of the hub Hh, and the fitting ring 6 projects upward due to the elastic force of the biasing member 7, and the outer circumference of the circular raised portion Hh2 downward of the hub Hh. Be fitted to. Further, the drive pin Pd is pushed downward, and is lowered against the elastic force of the biasing member 8.

As shown in FIG. 1B, when the FD (disk Df) is loaded, the hub Hf made of a magnetic material is magnetically attracted to the upper surface of the magnet 4 of the rotary table T, and the hub Hf.
The center pin 5 is fitted in the center hole Hf1 of f. Further, the fitting ring 6 is pushed by the lower surface of the hub Hf and descends. In this state, the rotary table T rotates and the drive pin Pd moves to the hub H.
When it coincides with the drive hole Hf2 of f, the drive pin Pd is fitted into the drive hole Hf2 by the elastic force of the biasing member 8, and thereafter, the rotational force is applied to the hub Hf by the force of the drive pin Pd.

As shown in FIGS. 1A and 1B, a carriage 10 that moves in the radial direction of the disk is provided on the side of the rotary table T. The carriage 10 is guided by a linear guide mechanism or the like so as to be linearly movable in the horizontal direction, and is moved by a linear motor mechanism (not shown).

As shown in FIG. 3B, the carriage 10
An optical head A is provided inside. This optical head gives optical energy for recording to the recording surface of an HS disk (disk Dh) which is a magnetic recording system, irradiates the recording surface of the disk with laser light and detects the reflected light at the time of reproduction. It is for. The optical head A is
The objective lens 11 facing the recording surface of the disk Dh, the semiconductor laser 12 as a light emitting portion for giving laser light to the objective lens 11, the light from the semiconductor laser 12 is transmitted in the direction of the objective lens 11, and at the time of reading data. It is composed of a semi-reflecting means 13 such as a half mirror or a polarization beam splitter that reflects the reflected return light from the recording surface of the disk Dh, a pin photodiode 14 that is a light receiving unit that receives the reflected return light, and the like. The optical head A is built in the carriage 10 or has the optical elements housed in a case.
It is installed on. The carriage 10 may also serve as the case.

In FIG. 3B, the optical elements are arranged so that the optical axis of the optical head H is vertical, but a mirror or prism for bending the optical axis at a right angle is provided below the objective lens 11. , Semiconductor laser 12 and pin photodiode 14
It is preferable to arrange the above in a plane in the carriage 10. Further, in FIG. 3B, an optical head A of an integrated optical system in which all optical elements are mounted in the carriage 10 is shown, but an optical head of a separate optical system can be used. In this separation type optical system, for example, only the objective lens 11 and a mirror or prism located below the objective lens 11 and bending the optical axis at a right angle are mounted on the carriage 10, and on the extension line of the moving linear locus of the carriage 10, a fixed part in the apparatus is installed. The semi-reflecting means 1
3, the semiconductor laser 12, the pin photodiode 14, etc. are arranged. Then, in the carriage 10, an optical axis bent by a mirror or a prism reaches a fixing portion in the apparatus through a space along the moving direction of the carriage 10.

The objective lens 1 on the carriage 10
The magnetic head B on the side 0 side, which is in contact with the disk Df, which is a magnetic disk, on the inner side of the disk with respect to the optical axis O of 1.
0 is mounted. The magnetic head B0 is composed of a slider 16 slidingly contacting the disk Df, a magnetic core 17 mounted on the slider 16 and a coil wound around the magnetic core 17.

As shown in FIGS. 3A and 3B, a single slider 21 is provided at a position facing the optical head A and the magnetic head B0 via the disk, and this slider 21 is provided for the disk Dh. A magnetic field generating portion E for performing magneto-optical recording and a magnetic head portion B1 on the side 1 side for performing recording / reproducing on the disk Df are integrally provided. As shown in FIG. 3A, the magnetic field generation unit E includes a magnetic core 22 and a coil 23 that generates a magnetic field in the magnetic core 22, and the magnetic head unit B1 includes the magnetic core 2
4, erasing coil 25 and recording / reproducing coil 26
It is composed of

A support mechanism 30 for supporting the slider 21.
Is a flexure (gimbal) 31 made of a leaf spring for supporting the upper surface of the slider 21 so as to be capable of swinging displacement in each direction,
The load beam 3 that supports the center of the flexure 31
2 and has a load beam 3 as shown in FIG.
The base end of 2 is fixed to the carriage 10. The elastic force by which the load beam 32 presses the slider 21 toward the disk is relatively weak and is set to about 2 g (gram). When the magneto-optical recording disk Dh rotates, the slider 21 is moved by the air flow on the disk surface. It is set so that you can ascend.

A reinforcing spring 33 made of a leaf spring is provided above the load beam 32. A pressing pivot 34 is provided at the tip of the reinforcing spring 33 to press the center point of the upper surface of the slider 21 from above. The leaf spring 33 is always capable of exerting an elastic force in the disc direction, and as shown in FIGS. 1B and 3B, the pressing pivot 34 causes the slider 21 to move due to the elastic force of the leaf spring 33.
When the center point of the upper surface of the disk is pressed, the pressing force of the slider 21 in the disk direction is increased more than that when the load beam 32 is used alone, and the disk Df which is a magnetic disk.
Are elastically sandwiched between the slider 21 and the slider 16 on the side 0 side.

As shown in FIG. 1, a pressing force switching means 40 is provided above the rear portion of the carriage 10. In the pressing force switching means 40, the shaft 42 is attached to the carriage 10.
A switching arm 41 rotatably supported by is provided with a fan-shaped gear 41c integrally formed at the base of the switching arm 41, and the gear 41c meshes with the drive gear 43. The drive gear 43 is driven by a switching motor (not shown) mounted on the carriage 10. A lifting portion 41a for lifting the reinforcing spring 33 is formed at the tip of the switching arm 41.
A lifting portion 41b for lifting the load beam 32 is formed on the middle side of the No. 1.

When the disc is not loaded, the drive arm 43 of the pressing force switching means 40 is used to switch the switching arm 41.
Is further rotated clockwise from the state of FIG. 1A, the reinforcing spring 33 is lifted by the lifting portion 41a, and the load beam 3 is lifted by the lifting portion 41b.
2 is lifted, and the slider 21 is largely moved upward from the disc area to be in the retracted state. Also carriage 1
0 moves to the retracted position on the right side of FIG.

As shown in FIG. 1A, a magneto-optical recording type HS disk (disk Dh) is loaded and a hub Hh
When is mounted on the rotary table T, the carriage 10 moves to the left in the drawing, and the optical head A and the slider 21 face the upper and lower surfaces of the disc Dh through the window Wh opened in the cartridge Ch. On the lower side, the slider 16 of the magnetic head B0 is slightly apart from the lower surface of the disk Dh.

In the recording operation, the rotation of the drive gear 43 causes the switching arm 41 to rotate counterclockwise to the position shown in FIG. In this state, the lifting portion 41b of the switching arm 41 is separated from the load beam 32, and the lifting portion 41a lifts the reinforcing spring 33, and the elastic force of the reinforcing spring 33 does not act on the slider 21. Therefore, the elastic force of the load beam 32 alone causes the slider 21 to be lightly pressed onto the upper surface of the disk Dh by a pressing force of about 2 g (gram). Therefore, when the disc Dh is rotated by the turntable T, the slider 21 is levitated by the air flow on the disc and functions as a flying head. The laser light is focused from the objective lens 11 of the optical head A, optical energy is applied to the recording surface of the disk Dh, and a magnetic field is applied to the recording surface of the disk Dh from the magnetic field generation unit E of the slider 21 to perform optical modulation or magnetic field modulation. Thus, a signal is recorded on the recording surface of the disc Dh.

When the recorded content of the disc Dh is reproduced or read, the drive gear 43 causes the switching arm 41 to rotate further clockwise than in FIG. 1A, and the lifting portion 41b lifts the load beam 32. As a result, the slider 21 greatly separates from the upper surface of the disk Dh. In the reproducing operation, the laser light emitted from the semiconductor laser 12 is switched to a low output. Objective lens 11
The laser light emitted from is reflected on the recording surface of the disk Dh and is detected by the pin photodiode 14 of the optical head A. Then, the signal is reproduced by the polarization component of the Kerr effect or Faraday effect of the reflected return light from the recording surface.

Disk Df which is a magnetic disk (FD)
1B, the switching arm 41 is largely rotated counterclockwise by the drive gear 43 of the pressing force switching means 40, and the lifting portion 41a and the lifting portion 41b are respectively reinforced springs, as shown in FIG. 1B. 33 and the load beam 32. Therefore, the pressing pivot 34 is elastically pressed against the upper surface of the slider 21, and the force for pressing the slider 21 in the disk direction is increased. Therefore, the disk Df is elastically sandwiched between the slider 21 and the lower slider 16, and magnetic recording or reproduction is performed on the side 0 side and the side 1 side.

At this time, as shown in FIG. 3B, since the center point of the upper surface of the slider 21 is pressed by the pressing pivot 34, the disk Df rotates and the slider 21 slides on the disk Df. The sliding posture of the slider 21 is stable. The pressing point of the pressing pivot 34 is located right above the magnetic core 17 of the magnetic head B0 on the side 0 side. Therefore, the disk Df can be stably pressed and slid against the magnetic core 17 of the magnetic head B0 on the side 0 side.

FIG. 4 shows another structural example of the support mechanism of the slider 21 and the pressing force switching means. In this example,
The elastic force of the load beam 51 supporting the slider 21 is set to be larger than that of the load beam 32, and the elastic force of the load beam 51 causes the slider 21 to come into contact with the disk Df of the FD. The disc Df is sandwiched. And
When a magneto-optical recording type disc Dh is loaded,
The relaxation gear 52 is driven by the drive gear 53 of the pressing force switching means 55.
Is rotated clockwise, and the relaxation spring 52 applies an upward elastic force to the load beam 51. Therefore, in this case, the force with which the slider 21 is pressed against the disk Dh is reduced, and the slider 21 can function as a flying head. When the relaxation spring 52 is further rotated clockwise from that position, the load beam 51 is lifted and the slider 21 moves to the retracted position away from the disk.

FIG. 5 is a plan view showing still another configuration example. In FIG. 5, the magnetic field generating portion E used in magneto-optical recording is mounted on the slider 61, and the magnetic head portion B1 on the side 1 for the magnetic disk is mounted on the slider 63, so that both sliders 61 and 63 are independent. It has become a thing. Further, the load beam 62 supporting the slider 61 exerts an elastic force to the extent that the slider 61 can function as a flying head, and the load beam 64 supporting the slider 63 can press the slider 63 against the disk Df. Exhibits elastic force. In this way, the load beams (support springs) 62 and 64 provided separately can exert different elastic forces.

As shown in FIG. 1, if a common slider 21 is used for the magnetic field generating portion E and the magnetic head portion B1 on the side 1 side, and the supporting mechanism 30 is also made common, the number of parts can be reduced.
This is advantageous in terms of space. On the other hand, as shown in FIG. 5, if the magnetic field generating portion E and the magnetic head portion B1 on the side 1 side are individually provided with sliders, the structure becomes complicated and the space design becomes slightly difficult. However, since the slider 61 for magneto-optical recording and the slider 63 for magnetic disk can be set according to the characteristics of each recording method, it is easy to improve the recording or reproducing accuracy, and the adjustment work becomes easy. Have advantages. In addition, in FIG. 5, the other load beam is branched and extended from the middle of one load beam, and the slider 61 or 63 is provided at the tip of each load beam.
May be attached.

[0044]

As described above, according to the present invention, a magnetic disk such as a 3.5-inch FD and a magneto-optical disk such as an HS standard can be commonly mounted, and recording / reproducing operations can be performed. Therefore, it is possible to effectively use the space in the main body of the personal computer and to diversify data copying and installation.

[Brief description of drawings]

FIG. 1 shows a main structure of a disk recording / reproducing apparatus of the present invention, (A) shows a case where a magneto-optical disk is loaded, and (B) shows a case where a magnetic disk is loaded.

FIG. 2 is a perspective view showing the structure of a rotary table,

FIG. 3A is a plan view of a slider on the side 1 side,
(B) A side view showing a combination of heads,

FIG. 4 is a side view showing another configuration example of the pressing force switching means,

FIG. 5 is a plan view showing a configuration example in which sliders are separately provided for a magnetic head and a magneto-optical head,

FIG. 6 is a plan view comparing the dimensions of various parts of a 3.5-inch FD and an HS standard magneto-optical disk;

[Explanation of symbols]

 Dh HS standard magneto-optical disk Df 3.5-inch magnetic disk A Optical head B0 Side 0 side magnetic head B1 Side 1 side magnetic head section E Magnetic field generating section T Rotating table Pd Drive pin 1 Spindle shaft 4 Magnet 5 Center Pin 6 Fitting ring 10 Carriage 11 Objective lens 16 Side 0 side slider 21 Side 1 side slider 30 Support mechanism 32 Load beam 33 Reinforcement spring 40 Pressing force switching means 41 Switching arm 51 Load beam 52 Relaxation spring 55 Pressing force switching means 61, 63 Sliders provided individually

Claims (5)

[Claims] 1. A rotary table on which both the center of a magnetic disk and the center of a magneto-optical disk can be mounted, a carriage which moves along a recording surface of the disk, and a side of the magnetic disk mounted on the carriage. A magnetic head for 0 and an optical head for irradiating a magneto-optical disk with light;
A disk recording / reproducing apparatus comprising: a magnetic field generating section that opposes the optical head with a disk sandwiched therebetween and applies a magnetic field to a recording surface of the disk to perform magneto-optical recording with light from the optical head. 2. The disk recording / reproducing apparatus according to claim 1, wherein a magnetic head portion for side 1 of the magnetic disk is provided at a position facing the magnetic head with the disk interposed therebetween. 3. A magnetic field generating section for magneto-optical recording and a magnetic head section for side 1 are mounted on the same slider, and when a magnetic disk is used and when a magneto-optical disk is used. 3. The disk recording / reproducing apparatus according to claim 2, further comprising pressing force switching means for switching a force for pressing the slider in the disk direction. 4. The disk according to claim 2, wherein the magnetic field generating section for magneto-optical recording and the magnetic head section for the side 1 are mounted on different sliders, and both sliders are pressed in the disk direction by different forces. Recording / playback device. 5. The rotary table has a center pin that can be fitted to both the center of the hub of the magnetic disk and the center of the hub of the magneto-optical disk, and a drive that can be inserted into the drive hole of the hub of the magnetic disk. A pin and a fitting ring that can be fitted to the hub of the magneto-optical disk, wherein each of the drive pin and the fitting ring can project in the hub direction depending on the type of the disk to be loaded. Item 5. The disc recording / reproducing apparatus according to any one of items 1 to 4.