JPH064929A - Device for recording and reproducing magneto-optical information - Google Patents

Abstract

PURPOSE:To obtain a magneto-optical information recording and reproducing device provided with a braking means capable of easy mounting without enlarging a device, thus resulting a low cost. CONSTITUTION:A floating magnetic head 18 is supported by a loading beam 20. and the loading beam is joined to an optical head 12 through a joint member 22 and a carriage 14, and the loading beam 20 whose base part 21 is deformable elastically is deformable so as to move the magnetic head 18 between a position close to the surface of a magneto-optical disk 2 and a retreat position separated from the surface of the magneto-optical disk. A braking member 28 is provided which is abutted on the loading beam base part 21 when the magnetic head 18 is in the retreat position separated from the surface of the magneto-optical disk 2. The carriage 14 is the mover of a linear motor and is moved along the stator member 16 of the linear motor in the direction of a disk radius.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical information recording / reproducing apparatus, and more particularly to a magneto-optical information recording / reproducing apparatus having means for maintaining a magnetic head and an optical head at predetermined positions during non-recording / reproducing.

[0002]

2. Description of the Related Art In a magneto-optical information recording / reproducing apparatus, a light beam is spot-irradiated on a magneto-optical recording medium and a magnetic field is applied to the spot irradiation position. Information is recorded by modulating the beam according to the recording information signal. Further, in this apparatus, the information recorded on the magneto-optical recording medium is reproduced by detecting the reflected light from the light spot formed by spot-irradiating the magneto-optical recording medium with the light beam.

By the way, an operation (loading) of mounting the magneto-optical recording medium at a recording / reproducing position of the recording / reproducing apparatus.
At the time of or during the operation of ejecting the magneto-optical recording medium from the recording / reproducing position (eject), the magneto-optical recording medium is retracted from a position close to the surface position of the mounted magneto-optical recording medium. It is necessary to form a space for eject and load operations, and in this state it is necessary to maintain a stopped state so that the magnetic head and optical head do not move due to external impact. .

FIG. 3 shows a schematic structure of a conventional magneto-optical information recording / reproducing apparatus having a mechanism for retracting the magnetic head and maintaining the stopped state of the magnetic head and the optical head. In FIG. 3, 2A is a magneto-optical disk, and 6 is a spindle motor for holding and rotating the disk. An optical head 12 is arranged on the lower surface side of the disk 2A, and the optical head is fixedly supported by a carriage 14. Reference numeral 16 denotes a stator member of a linear motor having the carriage 14 as a moving element. The carriage 14 can reciprocate along the stator member 16 in the radial direction of the disk 2A. Reference numeral 17 is a brake unit that engages with the carriage 14 and prevents movement of the carriage. A floating magnetic head 18 is arranged on the upper surface side of the disk 2A. The magnetic head is held by one end of a load beam 20, and the other end of the load beam is connected by a connecting member 22.
Installed on. The rotary drive member 23 is attached to this attachment portion. The connecting member 22 is the carriage 1.
4 and the load beam 20, and thus the magnetic head 18 is in a position corresponding to the optical head 12.

The operation of ejecting and loading the disc in the above apparatus will be described with reference to FIG. First, from the state shown in FIG. 3, the rotation driving member 23 is operated to rotate the load beam 20, whereby the magnetic head 18 attached to the tip of the load beam is retracted from the surface of the disk 2A. Then, the brake unit 17 is operated to activate the optical head 12 and the magnetic head 18.
To prevent the disk from moving in the radial direction. Then, the eject operation of the disc 2A is performed. Note that when loading the disc, the order may be reversed from the case of ejecting.

As described above, the conventional magneto-optical information recording / reproducing apparatus is provided with the dedicated brake unit so that the magnetic head and the optical head do not move due to an external impact or the like during non-recording / reproducing. . The brake unit is equipped with a drive source, which increases the configuration of the device,
There is a drawback that the mounting is troublesome and the device cost is further increased.

Therefore, in view of the above-mentioned conventional techniques, the present invention provides a magneto-optical information recording / reproducing apparatus which is provided with a braking means which can be easily mounted without enlarging the apparatus structure and thus realizes cost reduction. The purpose is to provide.

[0008]

According to the present invention, in order to achieve the above object, an optical head for spot-irradiating a light beam onto a magneto-optical recording medium and a magnetic field applied to the spot irradiation position. A magneto-optical information recording / reproducing apparatus including: a magnetic head, wherein the magnetic head is supported by a supporting member, and the supporting member is directly or indirectly connected to the optical head; The support member can be deformed or displaced so as to move the magnetic head between a position close to the surface of the magneto-optical recording medium and a position separated from the surface of the magneto-optical recording medium. There is provided a magneto-optical information recording / reproducing apparatus, which has a brake member that comes into contact with the support member when the position is separated from the surface of the medium.

In one aspect of the present invention, the support member has an elastically deformable portion, and the brake member is brought into contact with the elastically deformable portion. Here, the deformation of the supporting member can be caused by the driving means that acts on a supporting member portion different from the supporting member portion with which the brake member abuts.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic block diagram showing an embodiment of a magneto-optical information recording / reproducing apparatus of the present invention. In FIG. 1, reference numeral 2 denotes a magnetic field modulation magneto-optical disk, and an upper surface thereof is provided with a protective coat 4 having good lubricity and slidability. 6
Is a spindle motor for holding and rotating the disk 2. An optical head 12 is arranged on the lower surface side of the disk 2, and the optical head is fixedly supported by a carriage 14. Reference numeral 16 denotes a stator member of a linear motor having the carriage 14 as a moving element. The carriage 14 is movable in the radial direction of the disk 2 along the stator member 16. A slidable floating magnetic head 18 is arranged on the upper surface of the disk 2. The magnetic head is held by one end of a load beam 20, and the other end of the load beam is attached to a connecting member 22. The connecting member connects the carriage 14 and the load beam 20. Thus, the magnetic head 18 is arranged at a position corresponding to the optical head 12, and the portion of the disk 2 where the optical beam is spot-irradiated from the optical head 12 is located. A magnetic field can be applied by the magnetic head 18.

The load beam 20 has its base portion (portion on the side of the connecting member) 21 elastically bendable and deformable, and can rotate about the connection position to the connecting member 22 as a fulcrum.
Thus, the magnetic head 18 can be moved from a position close to the disk surface shown to a retracted position separated from the disk surface. The rotation of the load beam 20 is driven by a solenoid 24 and a bearing 26 attached to the acting portion of the solenoid. That is, the bearing 26 is located below the load beam 20, and is separated from the load beam when the magnetic head 18 is in the position shown in FIG. The tip of the load beam can be pulled upward by abutting the lower surface. A brake member 28 is arranged above the base portion 21 of the load beam 20.

The solenoid 24 is driven and controlled by a drive circuit 30, and the drive circuit receives a signal from a detection circuit 32 for detecting a disc identification signal from the optical head 12 and a circuit 34 for loading / ejecting the disc 2. Is entered.

The operation of ejecting and loading a disk in the apparatus of this embodiment as described above will be described with reference to FIG. When ejecting the disc from the state of FIG. 1, an operation command signal is input from the load eject circuit 34 to the solenoid drive circuit 30, and a confirmation signal that the disc 2 is mounted is input from the detection circuit 32. To be done. The drive circuit 30 drives and controls the solenoid 24 to pull up the bearing 26 under this condition. As shown in FIG. 2, as the bearing is pulled up, the bearing comes into contact with the lower surface of the load beam 20, and the tip of the load beam is lifted upward.
At this time, the base portion 21 of the load beam 20 is bent and deformed and comes into contact with the brake member 28. Thus, the load beam 20 contacts the brake member 28 and the bearing 2
The brake is applied based on the maintenance of the contact state by 6 to prevent the magnetic head 18, the connecting member 22, the carriage 14 and the optical head 12 connected to the load beam from moving in the disk radial direction. it can. After that, the eject operation of the disk 2 is performed.
Note that when loading the disc, the order may be reversed from the case of ejecting.

In the above embodiment, the brake member 28
Does not require a drive source and can be sufficiently miniaturized. Further, since the braking is performed by using the driving force for separating the magnetic head 18 from the surface of the disk 2, a dedicated drive for braking is required. No source is required, therefore, the device configuration is simple, the mounting is easy, and the miniaturization and cost reduction can be achieved.

In the above embodiment, the load beam as the magnetic head supporting member has a portion which can be elastically deformed,
The brake member is brought into contact with the elastically deformable portion. However, in the present invention, the magnetic head is used as the surface of the magneto-optical recording medium regardless of whether or not the support member has the elastically deformable portion. The brake member may be elastically brought into contact with the support member when the brake member is in a position away from the support member.

In the above embodiment, the magnetic head is moved between a position close to the surface of the magneto-optical recording medium and a position separated from the surface of the magneto-optical recording medium.
Although the load beam serving as the magnetic head supporting member is deformed, the supporting member may be displaced in order to move the magnetic head in the present invention.

[0018]

As described above, according to the present invention, since the magnetic head and the optical head are braked by utilizing the driving force of the means for retracting the magnetic head supporting member, Therefore, a dedicated drive source is not required, and therefore the device configuration is simple, mounting is easy, and downsizing and cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a magneto-optical information recording / reproducing apparatus of the present invention.

FIG. 2 is a diagram for explaining the operation of the apparatus of FIG.

FIG. 3 is a schematic configuration diagram showing a conventional magneto-optical information recording / reproducing apparatus.

FIG. 4 is a diagram for explaining the operation of the apparatus of FIG.

[Explanation of symbols] 2 magneto-optical disk 12 optical head 14 carriage 18 floating magnetic head 20 load beam 21 load beam base 22 connecting member 24 solenoid 26 bearing 28 brake member

Claims (3)

[Claims] 1. A magneto-optical information recording / reproducing apparatus comprising an optical head for spot-irradiating a light beam onto a magneto-optical recording medium, and a magnetic head for applying a magnetic field to the spot irradiation position. The magnetic head is supported by a supporting member, and the supporting member is directly or indirectly connected to the optical head, and the supporting member has a position where the magnetic head is brought close to the surface of the magneto-optical recording medium. A brake that can be deformed or displaced so as to move between a position separated from the surface of the magneto-optical recording medium, and contacts the supporting member when the magnetic head is in a position separated from the surface of the magneto-optical recording medium. A magneto-optical information recording / reproducing apparatus having a member. 2. The magneto-optical information recording / reproducing apparatus according to claim 1, wherein the support member has an elastically deformable portion, and the brake member is brought into contact with the elastically deformable portion. 3. The magneto-optical information recording / reproducing apparatus according to claim 2, wherein the deformation of the supporting member is caused by a driving unit that acts on a supporting member portion different from a supporting member portion with which the brake member abuts.