JPH04222959A - Small-sized magneto-optical disk device - Google Patents

Abstract

PURPOSE:To offer a small-sized magneto-optical disk device which can be thinned and where the faulty action of a shutter opening and closing device does not occur. CONSTITUTION:A disk cartridge movement restraining device 19 is provided in the small-sized magneto-optical disk device which is thinned and where an electromagnet 14 is inserted in the upper surface side window part 5a of a disk cartridge 1 by horizontal movement after opening a shutter by the shutter opening and closing device 12, in the case of inserting the disk cartridge 1 in the cartridge case 11a of a loading and ejecting device 11 and loading the cartridge. Then, the device is thinned and the faulty action of the device 12 caused by the impact at the time of performing an ejecting action is prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small magneto-optical disk device that performs recording/reproduction using a small magneto-optical disk cartridge.

0002

2. Description of the Related Art In recent years, magneto-optical disk devices have been used for recording computer data, document files, and the like. The magneto-optical disk cartridge used in this device is a magneto-optical disk for recording/playback that can be freely erased and rewritten, and is housed in a resin case for ease of handling and to make it removable from the recording/playback device. It has been stored. These magneto-optical disks come in various sizes, from large 12-inch disks to small disks of 5.25 inches and 3.5 inches.

0003

FIG. 5 is an external perspective view showing a small magneto-optical disk cartridge used in the disk devices shown in FIGS. 1, 9 and 10, which will be described later. FIG. 5 (A) shows the top side with the shutter closed. Perspective view, (B) is a top perspective view with the shutter open, (C) is a bottom perspective view with the shutter closed, and FIG. 6 is housed in the cartridge shown in FIG. 5. 1 is a configuration diagram of a small magneto-optical disk, in which (A) is a bottom view and (B) is a partially enlarged sectional view. As shown in FIG. 5, the small magneto-optical disk cartridge 1 is composed of a small magneto-optical disk 2 on which information is recorded/reproduced, a thin box-shaped case 5 made of resin, a shutter 6 made of a thin metal plate, etc. There is.

This small magneto-optical disk 2 has a disc for recording and reproducing information using the magneto-optic effect on one surface of a substrate 2a, which is a disk made of transparent resin such as polycarbonate.
Magneto-optical film (MO film) made of Fe, Co, Tb, Gd, etc.
2b is formed, and a protective film 2c made of ultraviolet curing resin or the like is further formed thereon, and a hub 4 made of a thin metal plate for driving this disk 2 is fixed to the center. A large number of recording tracks are formed spirally or concentrically in the recording area 3 where information is recorded/reproduced. This disk 2 is housed in the case 5 as described above.

[0005] This case 5 is composed of an upper half and a lower half (not shown), and is formed by combining the joint surfaces of the two halves with the disk 2 housed therein. A window 5a extends from the upper end of the case 5 to the center.
On the other hand, a window 5c is formed at the center of the lower surface of the case 5 at a position corresponding to the window 5a. These windows 5a and 5c are closed by the shutter 6 when the disc cartridge 1 is not in use, and when the cartridge 1 is in use, the pressing force of a spring (not shown) biases the shutter 6 in the closing direction. The structure is such that it can be opened by sliding it sideways against the pressure. A window 6a is formed on the upper surface side of the shutter 6, and by sliding the shutter 6 laterally, the window 6a and the case 5
This window portion 5 is overlapped with the window portion 5a on the upper surface side.
It has an open structure.

The outer ends of the window 5a of the case 5 and the window 6a of the shutter 6 have a height that is approximately the same as the top surface of the disk 2 when the cartridge 1 is installed in a magneto-optical disk device to be described later. Side windows 5b and 6b
are formed respectively. Further, a chamfered tapered portion 5f is formed at the right corner in the insertion direction when the case 5 is installed.

Next, the principle of operation of a small magneto-optical disk device in which the small magneto-optical disk cartridge 1 having the above structure is mounted and used will be explained with reference to FIG. FIG. 4 is an explanatory diagram of the recording and reproducing operation of the disk device shown in FIGS. 1, 9, and 10, which will be described later. Further, FIG. 9 is a schematic configuration diagram showing a first example of a conventional small magnetic disk device in a state in which a disk cartridge is being installed, and FIG. 9(A) is a partially cutaway perspective view, and FIG. It is a partially cutaway side view.

As shown in FIG. 4, a first conventional small-sized magneto-optical disk device 20 uses the above-mentioned small-sized magneto-optical disk cartridge 1, and includes a rotary drive device 13, an electromagnet 14 for applying a bias magnetic field, and a laser. It is composed of a recording/reproducing device 16, a cartridge case 21a that holds the cartridge 1, and the like.

When the disk cartridge 1 is installed in the device 20, the case 5 is positioned by a positioning device (not shown), and the cartridge case 2
1a, and the shutter 6 is laterally slid by a shutter opening/closing device (not shown) provided in this device 20, thereby opening the windows 5a and 5c.

The hub 4 of the disk 2 is connected to the spindle motor 13a of the rotary drive device 13 through the window 5c.
The hub 4 is chucked by the drive hub 13b fixed to the drive shaft of the motor 13a, and the rotation torque of the motor 13a causes the hub 4 to
Therefore, this disk 2 is driven to rotate. Further, a bias magnetic field of a predetermined polarity is applied by the electromagnet 14 to the recording area 3 of the disk 2 through the window portion 5a as necessary. Then, the laser recording/reproducing device 16 records/reproduces information at a desired position in the recording area 3 of the disc 2 through the window 5c.

The configuration of the device 20 shown in FIG. 4 is schematically described for explaining its operation, but the actual configuration is as shown in FIG. 9. As shown in FIG. 9, this device 20 uses the disk cartridge 1 described above,
In addition to the above-mentioned rotary drive device 13, electromagnet 14, and laser recording/reproducing device 16, it is comprised of a base 17, a load/eject device 21, a shutter opening/closing device 22, an electromagnet vertical device 25, a chassis 28, and the like.

When the disc cartridge 1 is inserted by the user's hand through the cartridge insertion slot 28b provided in the front panel 28a of the chassis 28 with the end surface on the side of the shutter 6 facing inward, the open end is housed in the cartridge case 21a of the load/eject device 21, which is slightly larger than the case 5 of the disk cartridge 1 and is in an initial position in contact with the cartridge insertion opening 28b. As the disk cartridge 1 is inserted, the shutter 6 is laterally slid by the shutter opening/closing device 22 due to its pressing force, as will be described later, thereby opening both the windows 5a and 5c.

When the disk cartridge 1 is manually inserted to the innermost part of the cartridge case 21a, the lock lever 21f provided on the upper surface of the base 17 is rotated by the pressing force of the disk cartridge 1. When the locking mechanism (not shown) that holds the cartridge case 21a at this initial position is released, the cartridge case 21a, and thus the disk cartridge 1, are lowered, and the locking mechanism (not shown) that holds the cartridge case 21a at the initial position is released. The case 5 is positioned at a predetermined recording/reproducing position by a positioning device that does not include the above.

The hub 4 of the disk cartridge 1 is connected to the spindle of the rotary drive device 13 fixed to the upper surface of the base 17 through a window provided in the cartridge case 21a and the window 5c of the case 5. The disk 2 is chucked by the attraction force of a chucking magnet (not shown) built into the drive hub 13b by the drive hub 13b fixed to the drive shaft of the motor 13a, and the disk 2 is held in a position where it does not come into contact with the inner wall of the case 5. Ru. Then, due to the rotational torque of this spindle motor 13a, the hub 4, and therefore the disk 2, is rotated at CAV3.600r.
It is rotated at pm.

When the cartridge case 21a is at the initial position, the electromagnet 14 is at a standby position on the cartridge case 21a. As the cartridge case 21a is lowered, the electromagnet 14 is moved upward and downward by the action of the electromagnet up-and-down device 25 that utilizes the vertical movement of the cartridge case 21a.
By descending beyond the descending distance a, the window 21c provided in the cartridge case 21a and the case 5
The disc 2 is set at a predetermined recording/reproducing position through the window 5a with a clearance of about 0.6 mm from the top surface of the disc 2.

Further, the laser recording/reproducing device 16 is disposed on the upper surface of the base 17 in a position below the cartridge case 21a and movable in the radial direction of the disk 2. As the cartridge case 21a is lowered, the objective lens 16a of the device 16 connects to the recording area 3 of the disk 2 through the window provided in the cartridge case 21a and the window 5c of the case 5. They are placed opposite each other. This laser recording/reproducing device 1
6, information is recorded/reproduced at a desired position in the recording area 3.

Furthermore, at the end of this recording/reproduction, the cartridge case 21a is pushed upward by the user's pressing force on the eject button 21g of the load/eject device 21 provided on the front panel 28a. When the disk cartridge 1 reaches the initial position, it is held at this position by the locking mechanism, and the end of the disk cartridge 1 is pushed out from the cartridge insertion opening 28b by a cartridge pushing mechanism (not shown).

At this time, in conjunction with the operation of the cartridge case 21a, the electromagnet 14 is returned to the standby position by the action of the electromagnet up-and-down device 25 described above. and,
When the user extracts the disc cartridge 1, the shutter opening/closing device 22 closes the shutter 6 and removes the disc cartridge 1.
is taken out.

Next, the opening/closing operation of the shutter 6 by the shutter opening/closing device 22 will be explained. FIG. 8 is an explanatory diagram of the shutter opening/closing operation by the shutter opening/closing device in the disk drive of FIGS. 1, 9, and 10, which will be described later.
A) shows the beginning of inserting the disk cartridge into the cartridge case, (B) shows the middle of insertion, and (C) shows the disc cartridge being inserted into the cartridge case.
2A and 2B are diagrams each showing a state in which the insertion is completed.

As shown in the figure, the shutter opening/closing device 2
2 includes a lever 22a, a slide pin 22b extending downward from one end of the lever 22a, and a spring 2.
2c etc.

This lever 22a is centered around a shaft 22d erected on the upper surface of the cartridge case 21a.
Slide pin 22 while sliding on the top surface of case 21a.
The other end is pivotally supported so that b can rotate. An arc-shaped elongated hole 21b is formed on the upper surface of the cartridge case 21a from the left end to the rear end of the case 21a in accordance with the trajectory of the slide pin 22b. through,
It protrudes into the case 21a. The lever 22a pushes the spring 22 so as to bias the slide pin 22b from the rear end side to the left end side of the case 21a.
It is pulled by c.

Then, when the disk cartridge 1 is inserted into the cartridge case 21a, the end of the shutter 6 touches the slide pin 22, as shown in FIG.
b. At this time, in order to ensure the contact between the two, as shown in FIG.
A recessed portion 5d into which the portion 2b bites is formed. When the disk cartridge 1 is inserted deeper into the cartridge case 21a, the slide pin 22b is pushed along the elongated hole 21b by the pressing force of the cartridge case 1, as shown in FIG. 8(B). , case 21a
The shutter 6 is rotated from the left end toward the rear end side, and slides along the rear end surface of the case 5 to press the end of the shutter 6, so that the shutter 6 is slid laterally.

When the disk cartridge 1 is inserted to the innermost part of the cartridge case 21a, the slide pin 22b reaches the inner end of the elongated hole 21b, as shown in FIG. The case 5 is slid sideways to the end of its moving range, the window 5a of the case 5 is completely opened, and the window 5a of the cartridge case 21a overlaps with the window 21c of the cartridge case 21a. In order to ensure that the slide pin 22b presses the end of the shutter 6 in this state, as shown in FIG.
A recessed portion 5e into which the slide pin 22b bites is formed at the end position of the shutter 6 when it is completely open.

Further, as mentioned above, when the slide pin 22b reaches the inner end of the elongated hole 21b, as shown in FIG.
As shown in C), the lever 22a is connected to the window 5a.
The shape and arrangement do not block the areas 21c and 21c.

Further, when the disk cartridge 1 is removed from the cartridge case 21a, the shutter 6 is closed by an operation opposite to that described above.

In the first conventional compact magneto-optical disk device 20 having the above-described configuration, when the cartridge case 21a is at the initial position, the electromagnet 14 is moved to the above-mentioned position on the cartridge case 21a. Since it is in the standby position and the bias magnetic field generating surface of this electromagnet 14 is on the cartridge case 21a, the height from the bottom surface of this device 20 to the top surface of the electromagnet 14 is high, making it difficult to make this device 20 thinner. There was a problem.

Therefore, the present applicant proposed a compact magneto-optical disk device that solved the above-mentioned problems in Japanese Patent Application No. 1-24687.
2 (filed on September 22, 1989). next,
A small-sized magneto-optical disk device described in Japanese Patent Application No. 1-246872, which is designed to be thin, will be described as a second embodiment.

FIG. 10 is a schematic configuration diagram showing a second example of a conventional small-sized magneto-optical disk device in a state in which a disk cartridge is being installed. ) is a partially cutaway side view. Also, FIG. 7 shows
FIG. 10 is a plan view illustrating the mounting operation of a disk cartridge in the disk device of FIGS. 1 and 10, which will be described later.
A) shows a state before the disk cartridge is inserted, FIG. 1B shows a state in the middle of insertion, and FIG. 1C shows a state after insertion.

Small-sized magneto-optical disk device 3 of the second embodiment
Since the recording and reproducing operation of 0 is the same as that of the first conventional example shown in FIG. 4 described above, the explanation thereof will be omitted.

As shown in FIG. 10, this device 30 uses the disk cartridge 1 described above, and in addition to the rotation drive device 13, electromagnet 14, laser recording/reproducing device 16, and base 17, it also includes a load/eject device. 11, a shutter opening/closing device 12, an electromagnet vertical device 15, a chassis 18, and the like.

When the disc cartridge 1 is inserted by the user's hand through the cartridge insertion slot 18b provided in the front panel 18a of the chassis 18 with the shutter 6 side end facing inwards, the open end is housed in the cartridge case 11a of the load/eject device 11, which is slightly larger than the case 5 of the disk cartridge 1 and is in an initial position contacting the cartridge insertion opening 18b. As the disk cartridge 1 is inserted, the shutter 6 is laterally slid by the shutter opening/closing device 12 due to its pressing force, thereby opening both the windows 5a and 5c. The opening/closing operation of the shutter 6 by the shutter opening/closing device 12 is as follows:
Since this is the same as the case of the first conventional example shown in FIG. 8 described above, the explanation thereof will be omitted.

As shown in FIG. 7A, the depth dimension of the cartridge case 11a of the load/eject device 11 is about 20% smaller than the cartridge case 21a in the first conventional example described above. . Further, the shutter opening/closing device 12 is closer to the front panel 18a side as the depth dimension of the cartridge 11a is smaller.

Therefore, as shown in FIG. 2B, even when the disk cartridge 1 is inserted to the innermost part of the cartridge case 11a and the shutter 6 is completely opened, it cannot be removed from the cartridge insertion opening 18b. About 20% of the exposed part remains. Further, the electromagnet 14 is arranged at a standby position where the height of its bias magnetic field generating surface is slightly higher than the upper surface of the disk 2 and the upper surfaces of the slits 5b and 6b of the case 5 and shutter 6 in this state. has been done. Therefore, in the above state, both of the recessed portions 5b and 6b enter the lower side of the electromagnet 14, but they do not come into contact with each other.

Further, as shown in FIG. 2A, when the cartridge case 11a is at the initial position, the cartridge case detection lever 11d attached to the right rear end of the cartridge case 11a is connected to the base. 1
The cartridge case 11a is in contact with a stopper 11e fixed to the right rear end of the upper surface of the cartridge case 7, thereby preventing the cartridge case 11a from moving to the rear. As shown in FIG. 5B, when the disk cartridge 1 is inserted to the innermost part of the cartridge case 11a, the disc cartridge 1 is inserted into the tapered part of the case 5 through the window provided in the right back part of the cartridge case 11a. 5f, this cartridge case detection lever 11
By rotating d, the blocking state by the stopper 11e is released.

Therefore, as shown in FIG. 2C, when the portion of the disk cartridge 1 protruding from the cartridge insertion opening 18b is pushed by the user's hand, the cartridge case 11a is pushed further into the interior. The disk cartridge 1 moves horizontally and reaches an intermediate position in which insertion of the disk cartridge 1 is completed. In this state, the electromagnet 14 in the standby position is in the cartridge case 11a.
It has a shape that fits into the window portion 11c of the case 5 and the window portion 5a of the case 5. Further, the lock lever 11f provided on the upper surface of the base 17 is rotated by the pressing force of the cartridge case 11a, and the cartridge case 1 is rotated.
By releasing a locking mechanism (not shown) that holds 1a in the intermediate position, this cartridge case 11a, and therefore the disk cartridge 1, descends.
A positioning device (not shown) provided on the upper surface of the base 17 positions the case 5 at a predetermined recording/reproducing position.

Further, the hub 4 of this disk cartridge 1 is connected to the drive hub 13b fixed to the drive shaft of the spindle motor 13a of the rotary drive device 13, as in the case of the first conventional example described above. King and rotationally driven.

Further, as the cartridge case 11a is lowered as described above, the electromagnet 14 is linked to the cartridge case 11a and lowered by the action of the electromagnet raising and lowering device 15 that utilizes the vertical movement of the cartridge case 11a. Clearance with the top surface of disk 2 is 0.6m
It is set in a predetermined recording/reproducing device of about m.

Then, the laser recording/reproducing device 16 records/reproduces information at a desired position in the recording area 3 of the disk 2, as in the case of the first conventional example described above.

After the recording/reproducing is finished, the cartridge case 11a is pushed upward by the user's pressing force on the eject button 11g of the load/eject device 11 provided on the front panel 18a. When the intermediate position is reached, the cartridge case 11a is moved to the initial position by a spring (not shown) that urges the cartridge case 11a toward the front panel 18a, so that the end of the disk cartridge 1 is pushed out from the cartridge insertion opening 18b. .

At this time, in conjunction with the operation of the cartridge case 11a, the electromagnet 14 is returned to the standby position by the action of the electromagnet up-and-down device 15, and
The cartridge case detection lever 11d, the lock mechanism, and the lock lever 11f are returned to their original positions. When the user removes the disk cartridge 1, the shutter opening/closing device 12 closes the shutter 6 and the disk cartridge 1 is removed.

In the second conventional compact magneto-optical disk device 30 having the above-described configuration, when the cartridge case 11a is in the intermediate position, the shutter 6 of the disk cartridge 1 is opened. The electromagnet 14 is in the standby position where the height of its bias magnetic field generating surface is slightly higher than the upper surface of the disk 2 and the upper surfaces of the slits 5b and 6b of the case 5 and shutter 6 in this state. Therefore, the height of the electromagnet 14 from the bottom surface of the device 30 is lower than that of the first conventional example described above, and the device 30 can be made thinner.

[0042]

The first conventional compact magneto-optical disk device 20 having the above-mentioned configuration has the problem that it is difficult to make it thinner, as described above. Also, a second conventional example of a small magneto-optical disk device 30
Although it is possible to make the shutter thinner, there is a problem that there is a risk that the shutter opening/closing device 12 may malfunction.

[0043] This malfunction occurs when the eject button 1
During the eject operation described above due to a pressing force of 1 g by the user, the impact force when the cartridge case 11a reaches the initial position from the intermediate position causes the disk cartridge 1 to move toward the front panel 18a within the cartridge case 11a. By moving, the slide pin 12b lifts up from the end of the shutter 6, the shutter 6 is closed at this position, and the slide pin 12b rides on the end surface of the shutter 6.

FIG. 11 is an explanatory diagram illustrating a malfunction of the shutter opening/closing device during an eject operation in the disk device of FIG. 10. As shown in the figure, in the initial position, the slide pin 12 is attached to the rear end surface of the shutter 6.
If the user pulls out the disc cartridge 1 in the state where the disc 1 is stuck, there will be no problem, but if the user tries to record/write again.
When this disc cartridge 1 is pushed toward the intermediate position by the user's hand in order to continue playing,
There is a risk that the upper surface of the shutter 6 will collide with the electromagnet 14 and the electromagnet 14 will be destroyed.

The present invention has been made with attention to the above points, and an object of the present invention is to provide a compact magneto-optical disk device which can be made thinner and which does not cause malfunction of the shutter opening/closing device. be.

[0046]

[Means for Solving the Problems] In the small magneto-optical disk device of the present invention, windows formed at corresponding positions on the upper and lower surfaces of a case in which the small magneto-optical disk is housed are closed by an openable and closable shutter. a load/eject device that uses a small-sized magneto-optical disk cartridge and moves a cartridge case housing the disk cartridge at least horizontally between an initial position where the cartridge is inserted by a user and a recording/reproducing position; and a shutter opening/closing device for opening and closing the disk cartridge, and after the shutter opening/closing device opens the shutter when the disk cartridge is installed, the load/eject device inserts a shutter into the upper surface side window portion slightly from the top surface of the disk. In a small magneto-optical disk device in which a bias magnetic field generating element located at a high standby position is inserted into the cartridge case, the above-mentioned object is achieved by providing a movement suppressing means for suppressing relative movement with the disk cartridge in the cartridge case. The goal is to achieve the following.

[0047]

[Embodiment] A small-sized magneto-optical disk device of the present invention is a thin disk device similar to the second conventional example described above, in which means for suppressing movement of the disk cartridge is provided in the cartridge case. .

FIG. 1 is a schematic configuration diagram showing an embodiment of a compact magneto-optical disk device of the present invention in a state in which a disk cartridge is being installed. ) is a partially cutaway side view. Also, Figure 2 shows
FIG. 3 is a schematic configuration diagram of the disk cartridge movement suppressing device in the disk device of FIG. 1. FIG. 3 is an explanatory diagram explaining the operation of the device of FIG. B) is a diagram showing a state in which the cartridge is inserted to the innermost part of the cartridge case.

As shown in FIG. 1, a small magneto-optical disk device 10 according to an embodiment of the present invention uses the disk cartridge 1 described above, and includes the load/eject device 11 described above,
Shutter opening/closing device 12, rotation drive device 13, electromagnet 14
, an electromagnet up/down device 15, a laser recording/reproducing device 16, a base 17, a chassis 18, and a disk cartridge movement suppressing device 19, etc. As mentioned above, the second conventional example described above with reference to FIG. disk device 30
In contrast, this disk cartridge movement suppressing device 19
Since this is an additional example, the description of the parts similar to those in the second conventional example will be omitted.

As shown in FIG. 2, this disk cartridge movement suppressing device 19
It is composed of a pair of right and left levers 19a, 19f, etc., which are attached symmetrically to both sides of a, and since the levers are symmetrical, the following explanation will be about only the right lever 19a.

[0051] This lever 19a has an arm portion disposed in the center of the right side surface of the cartridge case 11a and approximately parallel to this side surface, and a circular tip is located near the end of the arm portion on the front panel 18a side. A protruding stopper portion 19b is formed, and this stopper portion 19b is
Window 1 formed on the right side of cartridge case 11a
1h, and is inserted into the inside of this case 11a. In addition, this arm part has a compression spring 19e attached to the rear end side, and the intermediate part between the stopper part 19b and the rear end part is pivotally supported by a shaft 19d fixed to the case 11a. This stopper portion 19b is moved by the spring force of the compression spring 19e to the case 11a.
However, the end portion 19c of the arm portion on the side of the stopper portion 19b comes into contact with the end portion of the window portion 11h, thereby restricting the amount of insertion of the stopper portion 19b into the inside of the case 11a. has been done.

When the cartridge case 11a is at the initial position and before the disk cartridge 1 is inserted, the disk cartridge movement suppressing device 19
is in the above-mentioned state, but as shown in FIG. 3A, when the disk cartridge 1 is inserted, the stopper portion 19b is pushed outward by the side surface of the cartridge 1, and the stopper portion 19b Slide on the side of 1.

As shown in FIG. 2B, when the disc cartridge 1 reaches the rear end of the cartridge case 11a, the stopper part 19b fits into the tapered hole 5g formed on the right side of the disc cartridge 1. As a result, the lever 19a holds the right side of the disk cartridge 1. Similarly, the lever 19f holds the left side of the cartridge 1. The strength of the compression spring 19e is such that the disk cartridge 1 does not move within the cartridge case 11a due to the impact force during the eject operation described above, and the stopper portion 19b does not move when the disk cartridge 1 is removed by the user. It is set so that it deviates from the tapered hole 5g and returns to the state shown in FIG.

The compact magneto-optical disk device 10 of the embodiment of the present invention having the above-described configuration can be made thin like the disk device 30 of the second conventional example described above, and also has the above-mentioned advantages. The disk cartridge movement suppressing device 19 suppresses the relative movement of the disk cartridge 1 within the cartridge case 11a due to the impact force during the above-mentioned ejecting operation, and prevents the above-mentioned shutter opening/closing device 12 from malfunctioning during the ejecting operation. .

[0055]

[Effects of the Invention] The compact magneto-optical disk device of the present invention having the above-mentioned configuration can be made thinner, and moreover,
Since malfunctions of the shutter opening/closing device are prevented, reliability and usability are improved, and the degree of freedom in designing a personal computer or the like in which this device is incorporated is improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a compact magneto-optical disk device of the present invention in a state in which a disk cartridge is being installed.

FIG. 2 is a schematic configuration diagram of a disk cartridge movement suppressing device in the disk device of FIG. 1;

FIG. 3 is an operation explanatory diagram illustrating the operation of the apparatus shown in FIG. 2;

FIG. 4 is an explanatory diagram of recording and reproducing operations of the disk device shown in FIGS. 1, 9, and 10;

FIG. 5 is an external perspective view showing a small magneto-optical disk cartridge used in the disk devices of FIGS. 1, 9 and 10. FIG.

FIG. 6 is a configuration diagram of a small magneto-optical disk housed in the cartridge of FIG. 5;

7 is a plan view illustrating the operation of mounting a disk cartridge in the disk device of FIGS. 1 and 10. FIG.

8 is an explanatory diagram of the shutter opening/closing operation by the shutter opening/closing device in the disk device of FIGS. 1, 9, and 10. FIG.

FIG. 9 is a schematic configuration diagram showing a first example of a conventional compact magneto-optical disk device in a state in which a disk cartridge is being installed.

FIG. 10 is a schematic configuration diagram showing a second example of a conventional small-sized magneto-optical disk device in a state in which a disk cartridge is being installed.

11 is an explanatory diagram illustrating a malfunction of the shutter opening/closing device during an eject operation in the disk device of FIG. 10; FIG.

[Explanation of symbols]

1 Small magneto-optical disk cartridge 2
Small magneto-optical disk 5a Window (top window) 5c Window (bottom window) 6 Shutter 10 Small magneto-optical disk device 11 Load/eject device 11a Cartridge case 12 Shutter opening/closing device 14 Electromagnet (bias magnetic field generating element) 19
Disk cartridge movement suppression device (movement suppression means)

Claims (1)

[Claims] 1. A small magneto-optical disk cartridge in which windows formed at corresponding positions on the upper and lower surfaces of a case in which the small magneto-optical disk is housed are closed by shutters that can be opened and closed, and the disk cartridge is A loading/ejecting device for horizontally moving a cartridge case for storing the cartridge between an initial position where the cartridge is inserted by a user and a recording/reproducing position, and a shutter opening/closing device for opening and closing the shutter; At the time of mounting, after the shutter opening/closing device opens the shutter, the load/eject device inserts a bias magnetic field generating element at a standby position slightly higher than the top surface of the disk into the upper surface side window portion. A small magneto-optical disk device according to the present invention, characterized in that the cartridge case is provided with movement suppressing means for suppressing movement relative to the disk cartridge.