JPH05266531A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To simplify the configuration and reduce the weight of the device by mounting a magnetic head on a floating type slider and mounting the slider on an optical pickup device via a load arm having an elastic supporting part. CONSTITUTION:The magnetic head is capable of recording and reproducing to a magneto-optical recording medium in keeping stably a prescribed space between the recording medium by the action of the slider 1 under the state of floating above the disk surface. The load arm 2 is supported by a supporting part 8A, and is retreated from the disk face against elastic force of the elastic supporting part 2A. In this case, since the load arm 2 is kept under the state of approximate parallel with the disk face by the supporting part 8A, a seek operation can safely be performed by an optical head 4A without colliding with the magnetic head while keeping its retreat position (load) position.

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 device capable of erasing and rewriting information on a disk-shaped magneto-optical recording medium, and more particularly to a magnetic field modulation type overwritable magneto-optical recording medium. The present invention relates to a magneto-optical disk device equipped with a magnetic field modulation type magnetic head that is loaded at a predetermined interval by the action of a flying slider.

[0002]

2. Description of the Related Art When performing magneto-optical recording by a magnetic field modulation method, it is necessary to bring a magnetic head close to a disk surface (recording film) of a magneto-optical recording medium because of the relationship between the modulation frequency and the generated magnetic field. There is no difference from the case of the disk device in the induction type magnetic recording system. Therefore, it is the simplest and most effective to employ a flying slider that utilizes the dynamic pressure effect of air generated by the rotation of the disk for the magnetic head in this magnetic field modulation method. In this case, the slider is urged toward the disk surface by using an urging means such as a bias spring, and when the magneto-optical recording medium is rotationally driven, the slider moves between the disk surface and the slider. By balancing the dynamic pressure of the air generated with the sliding surface, the required clearance can be maintained. Therefore, until the magneto-optical recording medium is rotationally driven for recording / reproduction, it is necessary to move the magnetic head together with the slider away from the disk surface by a proper driving means to retract the magnetic head to the unload position. A retracting mechanism for this purpose is prepared.

[0003]

However, in the case where an optical modulation type (laser light intensity modulation) magneto-optical recording medium or a ROM (embossed pit reflectance change) disk is erroneously loaded in the magneto-optical disk device. Does not take measures such as providing a smooth surface necessary for flying on the disk surface of the magneto-optical recording medium as in the case of using the above-mentioned flying slider, so that the disk surface of the magneto-optical recording medium is When the magnetic head is at the same load position, a stable flying state cannot be obtained, and the above-mentioned problems such as damage due to contact occur. Therefore, when a magneto-optical recording medium such as a light modulation type is mistakenly loaded, it is necessary to retract the magnetic modulation magnetic head and the floating slider to the unload position until the medium is ejected. is there. Further, when the magneto-optical disk device is also used for reproducing at least a magneto-optical recording medium such as an optical modulation type, it is necessary to retract the magnetic head to an unload position.

Therefore, the retracting mechanism is controlled on the basis of information from an appropriate detecting means, and functions to hold the magnetic head and the flying slider at the loading position or the unloading position. In this case, the retracting mechanism is provided with a guide member, and the floating slider is supported by a support through a load beam so that the support is pivotally supported by the optical pickup device and its proximal end side. Is to be pressed by the guide member. For this reason, since it is necessary to engage the guide member with the support within the seek operation range of the magnetic head, the guide member is extended in the radial direction of the magneto-optical recording medium. There is a drawback. Further, it is necessary to provide a bearing mechanism or the like for pivotally supporting the support on the optical pickup device side, which causes a problem that the structure becomes complicated and the weight increases.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a flying slider equipped with a magnetic head is mounted on an optical pickup device with a relatively simple and lightweight structure, and at the outside of the optical pickup device. It is an object of the present invention to provide a magneto-optical disk device which can be supported at a load position or an unload position by a small and simple supporting means.

[0006]

Therefore, according to the present invention,
At least the above-mentioned light is emitted from a magnetic head that moves integrally with the optical pickup device in the track direction of the magneto-optical recording medium while irradiating the disc-shaped magneto-optical recording medium with laser light from the optical pickup device to form a light spot. In a magneto-optical disk device in which a bias magnetic field is applied corresponding to a small area of a spot to write and read a magneto-optical signal, the magnetic head is mounted on a flying slider, and the slider is provided with an elastic supporting portion. The optical pickup is equipped with a supporting means for selectively supporting the load beam at a plurality of supporting angles against the elastic force of the elastic supporting portion via the load beam having When the device is moved, the supporting part of the supporting means is slidable in the longitudinal direction with respect to the load beam. There is configured so as to be able to roll.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. In the magneto-optical disk device shown here, an optical head (optical pickup device) 4A mounted on the carriage 4 by a seek linear motor 5 and the optical head 4 described above.
A seek operation is simultaneously performed with a magnetic head (not shown) facing the objective lens provided in A. The linear motor 5 is composed of a linear motor coil provided on the carriage 4 and a magnetic circuit (not shown) including a magnet provided along a guide for guiding the carriage 4 via a bearing.

The magnetic head is attached to a flying slider 1, and the slider 1 is supported by the carriage 4 via a load beam 2 having a plate-like elastic support portion 2A on the base end side. In this case, due to the function of the elastic support portion 2A, the floating slider 1 is held at the load position close to the disk surface 7A of the magneto-optical recording medium 7 which is rotationally driven by the spindle motor 6. At this loading position, the rotation of the magneto-optical recording medium 7 generates an air flow between the disk surface 7A and the slider 1 (magnetic head), and the dynamic pressure of the air flow keeps the required space, The slider can glide.

The magneto-optical disk device is equipped with a supporting means 8 for selectively supporting the load beam 2 at a plurality of supporting angles against the elastic force of the elastic supporting portion 2A, and moving the optical head 4A ( The supporting portion 8A of the supporting means 8 can be slid or rolled in the longitudinal direction of the load beam 2 during movement in the seek direction). That is, in this embodiment, the supporting means 8 is in the first biased state (small stroke of the plunger).
And a solenoid mechanism having a second biased state (a large operation stroke of the plunger), and its supporting portion 8A.
Is a bearing roller provided on the plunger. The bearing roller is adapted to be in rolling contact with the lower side of the load beam 2, and the carriage 4
When the sled is moved, the load beam 2 can be relatively moved in the longitudinal direction.

In the figure, reference numeral 9 is a drive circuit for the solenoid mechanism, and reference numeral 10 is a detection circuit. In the detection circuit 10, information on the magneto-optical recording medium supplied from the optical head 4A Is it a magnetic modulation type disc,
A control signal to the drive circuit 9 is output based on the information (determination whether the disc is a light modulation type disc). Further, a discriminating circuit 11 for discriminating the loading / ejection of the magneto-optical recording medium with respect to the spindle motor 6 is separately prepared, and the discriminating signal is also given to the drive circuit 9.

In such a configuration, with the magneto-optical recording medium loaded (loaded), the optical head 4A sends a type determination signal of the magneto-optical recording medium to the detection circuit 10, which is a magnetic modulation type. In the case of the disk of No. 2, since the drive circuit 9 is not supplied with the energizing signal and the solenoid mechanism 9 does not work, the plunger is held in the lowered state as shown in FIG. Therefore, as described above, in the magnetic head, the slider 1 serves to stably maintain the predetermined interval,
Recording and reproduction can be performed on the magneto-optical recording medium in a state of floating above the disk surface.

Further, when the loaded magneto-optical recording medium is read by the optical head 4A as the light modulation type, an urging signal is given from the detection circuit 10 to the drive circuit 9 to cause the solenoid mechanism to operate. Becomes the first biased state. Therefore, the load beam 2 is supported by the support portion 8A, and
As shown in, against the elastic force of the elastic support portion 2A,
It is retracted (separated) from the disc surface. In particular, in this embodiment, the load beam 2 is held in a state substantially parallel to the disk surface by the supporting portion 8A, so that, for example, when reproducing a light modulation type magneto-optical recording medium, this light beam 2 is used. When using a magnetic disk device, as shown in FIG.
While maintaining the retracted position (load position), the seek operation can be safely performed without causing the optical head 4A to collide with the magnetic head.

Incidentally, when the magneto-optical recording medium is loaded into the spindle motor 6 and is rotationally driven, or when it is unloaded from the spindle motor 6, the discriminating circuit is controlled by the control operation for taking in and out the magneto-optical recording medium. When the drive circuit 10 supplies the energizing signal to the solenoid mechanism 8,
The solenoid mechanism 8 is in the second biased state. As a result, as shown in FIG. 4, the plunger is largely pulled, and the flying slider (magnetic head) can be retracted to a position where it does not interfere with the loading / unloading of the magneto-optical recording medium.

In the above embodiment, the supporting means 8 is used.
However, the load beam 2 is selectively supported at a plurality of supporting angles (two biased states and non-biased states in this embodiment) against the elastic force of the elastic support portion 2A. Of course, the support angle can be set appropriately in consideration of design circumstances. Further, although the structure of the supporting portion is a bearing roller so that it can be rolled in the longitudinal direction of the load beam when the sled of the optical pickup device is moved, it is simply slid. Of course, it is okay.

[0015]

As described in detail above, according to the present invention, a magnetic head is mounted on a flying slider, and the slider is
It is mounted on an optical pickup device via a load beam having an elastic supporting portion, and equipped with a supporting means for selectively supporting the load beam at a plurality of supporting angles against the elastic force of the elastic supporting portion. When the sled of the optical pickup device is moved, the supporting part of the supporting means can be slid or rolled with respect to the load beam in the longitudinal direction thereof. It can be mounted on the optical pickup device with a simpler and lighter structure than that of the above configuration, and can be supported outside the optical pickup device at a load position or an unload position by a small and simple supporting means. Excellent effect can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view showing functions in one embodiment of the present invention.

FIG. 2 is also a schematic side view for explaining the above function.

FIG. 3 is likewise a schematic side view for explaining the above function.

FIG. 4 is also a schematic side view for explaining the above function.

[Explanation of Codes] 1 Slider (with a magnetic head) 2 Load beam 2A Elastic support 4 Carriage 4A Optical head 5 Linear motor 6 Spindle motor 7 Magneto-optical recording medium 7A Disk surface 8 Solenoid mechanism 8A Support 9 Rotating member 9a, 9b Engaging surface 10 Support beam 11 Slider 12 Leaf spring 13 Roller 14 Switching member 14a Projection 15 Solenoid mechanism 16 Spring

Claims (2)

[Claims] 1. A magnetic field which irradiates a disk-shaped magneto-optical recording medium with a laser beam to form a light spot from the optical pickup device and which moves integrally with the optical pickup device in the track direction of the magneto-optical recording medium. In a magneto-optical disk device in which a bias magnetic field is applied from the head at least corresponding to the minute area of the light spot to write and read a magneto-optical signal, the magnetic head is mounted on a flying slider, and the slider is Is mounted on the optical pickup device via a load beam having an elastic supporting portion, and equipped with a supporting means for selectively supporting the load beam at a plurality of supporting angles against the elastic force of the elastic supporting portion. However, when the optical pickup device is moved, the support portion of the support means is moved in the longitudinal direction with respect to the load beam. A magneto-optical disk device characterized by being configured so that it can slide or roll in any direction. 2. The supporting means sets one supporting angle thereof so that the load beam is supported substantially parallel to the disk surface of the magneto-optical medium. The magneto-optical disk device described in 1.