JPH0512742A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a magneto-optical recording and reproducing device which requires no dedicated driving source for the movement of a magnetic field producing means, therefore, requires neither an extra circuit nor space. CONSTITUTION:This device is equipped with an electromagnet 5 which applies a magnetic field to the magneto-optical disk, a slider 26 which loads/unloads the magnetooptic disk on/from a motor, and an arm 7 which moves the electromagnet 5 between a position where the loading of the magneto-optical disk is not disturbed and a position where the electromagnet is opposed to the magneto-optical disk, and a moving means is coupled with the slider 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical recording / reproducing apparatus used as an external storage device of a computer.

[0002]

2. Description of the Related Art In recent years, an optical disk apparatus, which is a recording / reproducing apparatus using an optical disk capable of recording, reproducing, and erasing information on a recording medium by using laser light, has been attracting attention. Among them, there is one that records and erases information while applying a magnetic field to a recording medium. Such a recording medium is called a magneto-optical disk, and a recording / reproducing apparatus using this magneto-optical disk is called a magneto-optical disk apparatus. There is.

Conventionally, as a means for applying a magnetic field to a magneto-optical disk, there has been known one in which a coil or a permanent magnet is installed close to the recording surface of the magneto-optical disk.

The magneto-optical disk is often housed in a case to protect the recording surface, and the combination of the case and the magneto-optical disk is called a cartridge.

The structure of a conventional recording / reproducing apparatus using a magneto-optical disk will be described below. FIG. 12 is a perspective view of the inside of the apparatus, and 1 is a magneto-optical disk which is a recording medium. Reference numeral 2 is an optical pickup for reading, erasing, and writing information with the magneto-optical disk 1, and 2a is an objective lens for narrowing a laser beam. The optical pickup 2 is held by a guide shaft 3 so as to be movable in the radial direction of the magneto-optical disk 1.

Reference numeral 4 is a motor, 4a is a rotary table on which the magneto-optical disk 1 is mounted and rotates, 4b is a rotary shaft, and a permanent magnet 4c is provided around the rotary shaft 4b. An electromagnet 5 is provided on the opposite side of the optical pickup 2 across the magneto-optical disk 1 and serves as a magnetic field generating means for generating a magnetic field at a predetermined position of the magneto-optical disk 1 when writing or erasing information. This electromagnet 5 is provided on an arm 7 rotatably supported by a shaft 6, and as shown in FIG.
It is connected to the motor 11 via 9 and 10, and by driving the motor 11, the electromagnet 5 moves.

Reference numeral 12 is a coil attached to the optical pickup 2, 13 is a yoke made of a ferromagnetic material provided on the chassis, and 14 is a permanent magnet provided on the yoke 13. The coil 12, the yoke 13, and the permanent magnet. 14 is a direct drive motor, and when an electric current is applied to the coil 12,
The optical pickup 2 is guided by the guide shaft 3 and moves in the radial direction of the magneto-optical disk 1.

3 and 4 are perspective views of a cartridge 16 including a magneto-optical disk 1 and a case 15 for accommodating the magneto-optical disk 1. A positioning hole 1a is provided at the center of the magneto-optical disk 1, and a disk 1b made of a ferromagnetic material is provided around the hole 1a.
Is provided. The case 15 is provided with a first opening 15a on the side facing the optical pickup and a second opening 15b (not shown) on the side facing the electromagnet. A shutter 17 is provided in the case 15 and the first opening 15
a, a position that completely covers the second opening 15b, that is, FIG.
It is possible to move from the closed state shown in FIG. 3 to the exposed position, that is, to the open state shown in FIG.

Since the drawing is complicated in FIG. 12, the case 15 is omitted and only the magneto-optical disk 1 is shown.

Next, the operation of the conventional example will be described. FIG. 14 is a plan view showing a state where the cartridge 16 is being inserted into the apparatus from the outside, and FIG. 15 is a side view of the same. Figure 1
6 is a plan view showing a state in which the cartridge 16 is completely inserted into the apparatus, and FIG. 18 is a side view of the same. In these states, the arm 7 is held at a position where it does not overlap the cartridge 16.

Reference numeral 18 denotes a cartridge holder for holding the inserted cartridge 16, which is arranged so as not to interfere with the rotary table 4a when the cartridge 16 is inserted. In the process of inserting the cartridge 16 into the apparatus, the shutter 17 is opened by the shutter opening means (not shown), and the first opening 15a and the second opening 15b appear, and the magneto-optical disk as shown in FIG. 1 is exposed to the outside.

When the cartridge 16 is completely inserted into the apparatus, the cartridge holder 18 moves in the Z1 direction while holding the cartridge 16 as shown in FIG. 18, and the rotary table 4a is inside the case 15 from the first opening 15a. Then, the magneto-optical disk 1 is mounted on the rotary table 4a by the magnetic attraction force between the permanent magnet 4c of the rotary table 4a and the disk 1a of the magneto-optical disk 1. The optical pickup 2 also enters the case 15 through the first opening 15a and approaches the magneto-optical disk 1.

Next, as shown in FIGS. 19 and 20,
The arm 11 is rotated counterclockwise by the motor 11 and the electromagnet 5 is arranged above the magneto-optical disk 1. After this,
The magneto-optical disk 1 is rotated by the motor 4 and information is read from the magneto-optical disk 1 by operating the optical pickup 2 in a state where the electro-magnet 5 is not energized. If the optical pickup 2 is operated in a state where a magnetic field is generated on the surface of No. 1, information is written to or erased from the magneto-optical disk 1.

When the cartridge 16 is discharged, the motor 4 is stopped by the discharge command, the magneto-optical disk 1 is stopped, and the arm 11 is rotated clockwise by the motor 11.
As shown in FIG. 18, the arm 7 retracts to a position where it does not overlap the cartridge 16.

Thereafter, as shown in FIG. 17, the cartridge holder 18 moves in the Z2 direction while holding the cartridge 16, and the magneto-optical disk 1 is separated from the rotary table 4a. As shown in FIGS. The cartridge 16 is discharged to the outside of the apparatus by such means (not shown).

[0016]

However, in the above structure, the motor 11 as a dedicated drive source is required for moving the electromagnet 15 as the magnetic field generating means, and the space and drive circuit therefor are required. This hinders downsizing of the device and power saving.

The recording / reproducing apparatus of the present invention solves the above problems and does not require a dedicated drive source for moving the magnetic field generating means, and does not require an extra circuit or space therefor. A recording / reproducing apparatus is provided.

[0018]

A recording / reproducing apparatus of the present invention comprises a magnetic field generating means for applying a magnetic field to a recording medium, and an attaching / detaching means for attaching / detaching the recording medium to / from a rotational driving means.
A moving means for moving the magnetic field generating means to a position that does not interfere with the mounting of the recording medium and a position facing the recording medium is provided, and the moving means is connected to the attaching / detaching means.

[0019]

According to the present invention, when the attaching / detaching means is operated to attach / detach the recording medium, the moving means connected to the attaching / detaching means operates so that the magnetism generating means does not interfere with the mounting of the recording medium and the recording medium. Move between the positions facing
No dedicated drive source is required for moving the magnetic field generating means.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made to the embodiments of the invention with reference to the drawings.

FIG. 5 is a perspective view of the recording / reproducing apparatus. 1 is a magneto-optical disk, 2 is an optical pickup, 2a is an objective lens, 3 is a guide shaft, 4 is a motor, 4a is a rotary base, 4b is a rotary shaft, 4c is a permanent magnet, 5 is an electromagnet, 12 is a coil, 13 is a yoke, and 14 is a permanent magnet. Further, FIGS. 3 and 4 store a magneto-optical disk 1 as a recording medium and the magneto-optical disk 1 therein. FIG. 2 is a perspective view of a cartridge 16 including a case 15 in which 1 a is a hole, 1 b is a disc, and 15 a
Is a first opening, 15b is a second opening, and 17 is a shutter, and these have the same configurations as in the conventional example. Since the diagram is complicated in FIG. 5, the magneto-optical disk 1 is used as in the conventional example.
Showing only.

FIGS. 1 and 2 are a plan view and a side view of the embodiment, showing a state before the cartridge 16 is inserted. The arm 7 rotatably supported by the shaft 6 is
Is urged in the clockwise direction by a spring 19 provided around the chassis and hung between the pin 18 on the chassis and the arm 7, and comes into contact with the pin 20 on the chassis so as not to interfere with the cartridge 16 when the cartridge 16 is inserted. is there.

Reference numeral 21 is a cartridge holder, which is an insertion port 2
Hold the cartridge 16 inserted from 2 and
It is configured to be movable only in two directions.

Reference numeral 23 denotes an opening lever provided on the cartridge holder 21, which is pivotally supported by a shaft 24 and a spring 25.
Is urged clockwise by. A pin 23a is provided at the tip of the opening lever 23 and relates to the end surface of the shutter 17 of the cartridge 16 inserted as shown in FIG.

In FIGS. 1 and 2, reference numeral 26 is a slider, which is slidable in the X1 and X2 directions, and is urged in the X1 direction by a spring 27 that is hung between the slider and the cartridge holder 21. .. At the same time, the cartridge holder 21 is biased in the Y2 direction by the spring 27. As shown in FIG. 2, the slider 26 is provided with notches 26a at four positions.
Pins 21a attached to the cartridge holder 21 are engaged with 6a. Also, slider 2
6, a discharge button 26c is provided, and the discharge button 26c
Is protruding outside the body.

A lock lever 28 has an outer peripheral surface 28a, is rotatably supported by a shaft 29 provided on the chassis, and is biased counterclockwise by a spring 30.
The slider 26 is attached to the outer peripheral surface 28a of the lock lever 28.
The position of the slider 26 is determined by the contact of the upper pin 26b.

Reference numeral 31 denotes a moving plate provided on the slider 26, which is held so as to be movable in the X1 and X2 directions and is biased in the X2 direction by a spring 30. The moving plate 31 rotates the arm 7 via the pin 7 a on the arm 7 as the slider 26 slides. However, the spring 30 has a stronger spring force than the spring 19 that biases the arm 7. FIG. 1 shows a state in which the moving plate 31 biases the arm 7 in the clockwise direction, the arm 7 contacts the pin 32 on the chassis, and the spring 30 is pushed in somewhat.

Next, the operation of the embodiment will be described. 6 to 11 are a plan view and a side view of this embodiment, respectively.

As shown in FIGS. 6 and 7, when the cartridge 16 is inserted into the main body of the apparatus, the pin 2 of the opening lever 23 is released.
The end surface of the shutter 17 of the cartridge 16 comes into contact with 3a.

When the cartridge 16 is further pushed, as shown in FIG.
As described above, the opening lever 23 rotates counterclockwise to completely open the shutter 17, and the magneto-optical disk 1 is exposed. At this time, the end surface of the cartridge 16 is locked by the lock lever 2
8, the lock pin 26b of the slider 26 is disengaged from the outer peripheral surface 28a of the lock lever 28, the slider 26 slides in the X1 direction, and the cartridge holder 21 engages with the notch 26a of the slider 26. 21a allows the cartridge 16 to move in the Y2 direction.
With this, the magneto-optical disk 1 is mounted on the turntable 4a.

Further, the slider 26 moves in the X1 direction, and as shown in FIGS. 10 and 11, the arm 7 rotates in the counterclockwise direction with the movement of the moving plate 31, and the electromagnet 5 on the arm 7 is magnetized. It is located on the surface of the disc 1.

Thereafter, the magneto-optical disk 1 is driven by the motor 4.
Is rotated and the optical pickup 2 is operated in a state in which the electromagnet 5 is not energized, information is read from the magneto-optical disk 1. Further, the electromagnet 5 is energized and the magneto-optical disk 1 is energized.
If the optical pickup 2 is operated in a state where a magnetic field is generated on the surface of, the writing or erasing of information on the magneto-optical disk 1 is performed.

When the cartridge 16 is to be discharged, the cartridge shown in FIG.
0, when the eject button 26c is slightly pushed in from the state of FIG. 11, the arm 7 first rotates clockwise by the moving plate 31 and moves to a position where it does not interfere with the cartridge 16 until the position shown in FIG. The position has not changed yet.

Thereafter, when the eject button 26c is further pushed, the slider 26 moves in the X2 direction, the cartridge holder 21 moves in the Y1 direction, and the lock pin 26b moves the side surface 28 of the lock lever 28, as shown in FIG.
b, the lock lever rotates counterclockwise, so that the lock pin 26b moves the outer peripheral surface 28a of the lock lever 28.
The slider 26 is held in this position.

Then, the pin 21a rises upward along the fog 26a, and the cartridge 16 coincides with the insertion port 22.

The cartridge 16 is ejected from the main body by the lock lever 28, the opening lever 23, or the restoring force of the shutter 17 of the cartridge 16.

[0037]

As described above, according to the present invention, the magnetic field generating means for applying a magnetic field to the recording medium, the attaching / detaching means for attaching / detaching the recording medium to / from the rotary driving means, the position not disturbing the attachment of the recording medium and the recording are provided. A moving means for moving the magnetic field generating means to a position facing the medium, and the moving means is connected to the attaching / detaching means, and when the attaching / detaching means is operated to attach / detach the recording medium, the moving means connected thereto is The magnetic field generating means moves between a position where it does not interfere with the mounting of the recording medium and a position which faces the recording medium, and does not require a dedicated drive source for the movement of the magnetic field generating means. No space is required, and the device can be downsized or power can be saved.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a recording / reproducing apparatus of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view of a cartridge.

FIG. 4 is a perspective view of a cartridge.

FIG. 5 is a perspective view of an embodiment of a recording / reproducing apparatus of the present invention.

FIG. 6 is a plan view of the same.

FIG. 7 is a side sectional view of the same.

FIG. 8 is a plan view of the same.

FIG. 9 is a side sectional view of the same.

FIG. 10 is a plan view of the same.

FIG. 11 is a side view of the same.

FIG. 12 is a perspective view of a conventional example.

FIG. 13 is a perspective view of the same main part.

FIG. 14 is a plan view of the same.

FIG. 15 is a side view of the same.

FIG. 16 is a plan view of the same.

FIG. 17 is a side view of the same.

FIG. 18 is a side view of the same.

FIG. 19 is a plan view of the same.

FIG. 20 is a side view of the same.

[Explanation of symbols]

 1 Magneto-optical disk 2 Optical pickup 4 Motor 5 Electromagnet 7 Arm 16 Cartridge 26 Slider

Claims (1)

Claim: What is claimed is: 1. A magnetic field generating means for applying a magnetic field to a recording medium,
A rotation driving means for rotating the recording medium, and an attaching / detaching means for attaching or detaching the recording medium to or from the rotation driving means,
A recording / reproducing apparatus comprising: a moving unit that moves the magnetic field generating unit to a position that does not interfere with the mounting of the recording medium and a position that faces the recording medium, and the detaching unit is connected to the moving unit.