JPH0498667A - Magneto-optical disk cartridge - Google Patents

Abstract

PURPOSE:To prevent dust from entering without necessity for providing an opening part by arranging one part of a bias magnetic field generator at a disk cartridge at least. CONSTITUTION:A circular hub 4 provided at the center of a magneto-optical disk 2 is magnetically coupled to a turn table 6 fixed to the shaft of a spindle motor 5, and the rotational force of the motor 5 is transmitted to the magneto- optical disk 2. Then, at a base member 7 fixing the spindle motor 5, an optical head 8 is arranged for recording/reproducing/erasing a data toward the magneto- optical disk 2. Since one part of a bias magnetic field generator 10 is arranged at the magneto-optical disk cartridge, it is not necessary to provide the opening part for magnetic head access on the upper face of the magneto-optical disk cartridge, and dust can be prevented from entering from the upper face of the magneto-optical disk cartridge.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magneto-optical disk cartridge that accommodates a magneto-optical disk.

[Prior Art] Generally, a magneto-optical disk device in which a disk-shaped storage medium is replaceable includes a disk loading mechanism that attaches and detaches a disk cartridge containing a storage medium to and from a disk drive device.

Further, the disk cartridge has a window for opening a center hole of the storage medium stored therein, and
Windows opening the recording surface of the storage medium are drilled on both sides of the disk cartridge, and these windows are typically interconnected to define one opening on each side.

By the way, a magneto-optical disk device requires a magnetic head to generate an auxiliary magnetic field, and this magnetic head is placed close to the surface of the storage medium at a distance of about 1 mm due to the relationship between the required magnetic field and the amount of heat generated by the coil. It is necessary to accurately position the target position.

As a mechanism for this positioning, for example, as disclosed in Japanese Patent Application Laid-Open No. 62-209786, a mechanism is used that is linked to a clamper for holding the storage medium on a spindle motor, and magnetically moves from the opening of the disk cartridge. This is where the head is inserted.

[Problems to be Solved by the Invention] However, such conventional devices require a special magnetic load mechanism to bring the magnetic head close to the storage medium, which complicates the structure of the magneto-optical disk drive. There was an inconvenience.

Another problem is that outside air is forced into the gap between the disk cartridge and the magnetic head, and dust contained in the outside air adheres to the storage medium and the optical head, adversely affecting data recording/reproducing/erasing.

The present invention solves the disadvantages of the conventional device, simplifies the mechanism for loading the magnetic head, and
To provide a magneto-optical disk cartridge having a function of blocking dust from entering from the upper part of a case of a disk cartridge when the disk cartridge is loaded.

[Means for Solving the Problems] The present invention provides at least a portion of a magnetic head that generates an auxiliary magnetic field when recording/erasing data on a magneto-optical disk, and the magnetic head is provided with a magneto-optical disk. It is completed when the disk is positioned at a predetermined position in the magneto-optical disk moving device.

[Effect: Therefore, a part of the bias magnetic field generator is disposed in the magneto-optical disk cartridge.

There is no need to provide an opening for accessing the magnetic head on the top surface of the magneto-optical disk cartridge, and it is possible to prevent dust from entering from the top surface of the magneto-optical disk cartridge.

In addition, since the magnetic head is completed with the magneto-optical disk cartridge installed in the magneto-optical disk disposal device, there is no need to provide a special magnetic loading mechanism, and there is no need to provide a special magnetic loading mechanism. A stable gap can be obtained.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a rotating mechanism of a magneto-optical disk device according to an embodiment of the present invention. Note that this figure shows a state in which the disc cartridge 1 is attached to the sliding mechanism.

In the figure, a disk cartridge 1 containing a magneto-optical disk 2 is held at a tray 3, which is an element of a loading mechanism for the disk cartridge 1, and is positioned at a predetermined device position.

Further, in this state, the annular hub 4 provided at the center of the magneto-optical disk 2 is magnetically coupled to the turntable 6 fixed to the shaft of the spindle motor 5, thereby causing the spindle motor to 5 is transmitted to the magneto-optical disk 2.

An optical head 8 for recording/reproducing/erasing data on the magneto-optical disk 2 is disposed on the base member 7 to which the spindle motor 5 is fixed. It is configured to be able to reciprocate in the radial direction of the magneto-optical disk 2 within the effective recording area of the disk 2.

The tray 3 includes a magnetic head coil 10 whose generated magnetic field acts on at least the effective recording area of the magneto-optical disk 2.
is attached to a ferromagnetic material such as soft iron.

Further, a yoke 9 of the magnetic head is provided in the case of the disk cartridge 1 at a position where it can come into contact with the coil 10 when loading is completed.

Therefore, when the disk cartridge I is positioned at a predetermined position as shown in the figure, the coil 10 and the yoke 9 are in contact with each other, thereby forming a magnetic head that generates an auxiliary magnetic field.

Further, as shown in FIG. 2, on the surface of the disk cartridge 1 facing the optical head, there is an optical disk 2 accommodated therein.
A hub 4 and a window 11 for opening the recording surface of the optical disc 2 are provided. At the same time, a shutter 12 for opening and closing the window 11 is slidably provided.

On the other hand, as shown in FIG. 3, on the surface of the disk cartridge 1 facing the magnetic head, a yoke 9 is provided which contacts the coil 10 of the tray 3 and constitutes the magnetic head.

This yoke 9 is formed by insert molding a rod-shaped member made of a ferromagnetic material such as soft iron when molding a plastic case, and is provided on the case surface of the disk cartridge 1 without any unevenness. .

With the above configuration, when the disc cartridge 1 is inserted into the tray 3 and positioned at a predetermined position of the drive mechanism by a disc loading mechanism (not shown), the shutter 12 of the disc cartridge 1 is released by an appropriate means,
As mentioned above, the magneto-optical disk 2 is connected to the spindle motor 5.
is combined with

At this time, the coil 10 of the tray 3 and the yoke 9 of the disk cartridge 1 come into contact to form a magnetic head for generating an auxiliary magnetic field. The optical head 8 acts on the magnetic disk 2, so that the optical head 8 can record/erase data on the magneto-optical disk 2.

Further, since there is no opening on the surface of the disk cartridge 1 facing the magnetic head, there is no possibility of dust entering from this surface.

On the other hand, the periphery of the window 11 on the surface of the disk cartridge 1 facing the optical head 8 can be sealed with a sealing member or the like. Therefore, it is possible to construct a magneto-optical disk device that is completely unaffected by dust. can.

FIG. 4 shows the main parts of a magnetic head according to another embodiment of the invention. In addition, in the figures, the same reference numerals are given to the same parts and corresponding parts as in the above-described embodiment.

In the figure, the coil 10 is elastically supported by the tray 3 via leaf springs 15 and 16 while being inserted into the opening 3a formed in the tray 3. , leaf springs 15 and 16 are installed in the thickness direction of the tray 3.
Distance displacement is possible according to the amount of deflection.

Therefore, when the disk cartridge 1 is inserted into the tray 3, even if there is a slight gap between the coil 10 and the yoke 9 of the disk cartridge 1 due to component tolerances, the drive current is applied to the coil 10. In other words, the coil 10 is connected to the yoke 9 of the disk cartridge 1.
magnetically attracts and contacts.

In this way, the gap between the coil 10 and the yoke 9 is eliminated, so that the necessary magnetic field can be generated.

In the above-described embodiment, the case where the yoke is disposed on the disk cartridge has been described, but the coil disposed on the tray may also be disposed on the disk cartridge together with the yoke.

However, in that case, it is necessary to provide a contact mechanism between the tray and the disk cartridge so that a driving current can be applied to the coil disposed on the disk cartridge while the disk cartridge is positioned.

[Effects of the Invention] As explained above, according to the present invention, since at least a part of the magnetic head is disposed in the disk cartridge,
There is no need to provide a special magnetic head loading mechanism.

Further, at least a part of the bias magnetic field generating device is disposed in the disk cartridge.

There is no need to provide an opening for inserting the magnetic head into the disk cartridge, which prevents dust from entering.
The effect is that the reliability of erasure can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing a recording mechanism of a magneto-optical disk according to an embodiment of the present invention, FIG. 2 is a schematic plan view showing an example of a disk cartridge, FIG. 3 is a schematic perspective view of the same, and FIG. The figure is a schematic sectional view showing a coil according to another embodiment of the present invention. 9...Yoke, 10...Coil.

Claims (2)

[Claims] (1) A magneto-optical disk cartridge that accommodates a magneto-optical disk, characterized in that at least a part of a magnetic head that generates an auxiliary magnetic field when recording/erasing data on the magneto-optical disk is disposed. disc cartridge. (2) The magneto-optical disk cartridge according to claim 1, wherein the magnetic head is completed when the magneto-optical disk is positioned at a predetermined position of a magneto-optical disk drive.