JP2635371B2 - Recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical recording / reproducing apparatus using a cartridge containing a recording disk therein and requiring a magnetic field supply for recording and erasing information. In particular, the present invention relates to a configuration for moving the magnetic field supply unit in the apparatus and loading a cartridge.

2. Description of the Related Art In recent years, a system using a recording disk capable of writing, reproducing, and erasing information by a laser beam called a magneto-optical disk has attracted attention.

In general, a magneto-optical disk needs to expose a recording medium to a magnetic field when information is written or erased.

Therefore, conventionally, a coil is often provided on a recording surface of a disk to apply a magnetic field.

Many magneto-optical disks are housed in cartridges to protect the recording surface from dust and fingerprints.

FIG. 7A is a schematic configuration diagram of a recording / reproducing apparatus using a magneto-optical disk as described above. Reference numeral 1 denotes a cartridge in which a disk 2 is housed. Cartridge 1
Are provided with openings 1a and 1b (see FIG. 7 (C)). Reference numeral 3 denotes a cartridge holder made of sheet metal and holds the cartridge 3. 4 is called a slider, which is slidably configured in the drawing the arrow Y _1, Y ₂ direction, Y ₁
Directionally biased by a spring (not shown). The slider 4 is provided with four oblique notches 4a as shown in the figure, and four pins 3b attached to the cartridge holder 3 are engaged with these notches. Further, the cartridge holder 3 is provided the engagement portion 3c, engage the pin 5a erected on the chassis 5a, the cartridge holder 3 is restricted so as not to shift in Y _1, Y ₂ direction. The slider 4 is provided with a lock portion 9.
Is formed with a notch 9a.

A lock lever 10 is rotatably supported by a pin 12 on the chassis 5a, and a pin 13 attached to one end is engaged with a notch 9a of the lock portion 9. The lock lever 10 an end portion 10a of the lock lever 10 and the spring 11 is applied is biased to move in the arrow Y ₁ direction between the chassis 5a. Reference numeral 8 denotes a coil for supplying a magnetic field,
And is fixed to the chassis 5a.

FIG. 7 (B) shows the mounting structure of the optical head, and shows that the head 30 is located below the cartridge 1 so that the recording surface of the disk 2 can be irradiated with laser.

In the conventional example having the above configuration, loading of the cartridge 1 as described below is performed. FIG. 8 is an operation explanatory view showing the loading operation.

First, the cartridge 1 in Figure 8 (A) is when it is introduced in the y ₂ direction, end of the cartridge 1 to the contact portion 10a of the lock lever 10 shown in FIGS. 7 (A) abuts. Then, the lock lever 10 rotates in the direction of arrow A in the figure, and the pin 13 and the notch 9a
Engagement of the slider 4 out slides the y ₂ direction. Notch 4a of slider 4 and cartridge holder 3
Of the cartridge holder 3
, A downward force is applied by the oblique notch 4a. Here, since the engagement portion 3c of the cartridge holder 3 is engaged with the pin 5c set on the chassis 5a, the movement of the cartridge holder 3 is regulated.
It made it descends Z ₁ direction. FIG. 8 (B) shows a state in which it is lowered. In this state, the cartridge 1
And the motor 33 are engaged with each other. The motor 33 enters the cartridge 1 through the opening 1b on the back of the cartridge 1 shown in FIG. 7 (C). When the coil 8 is energized in this state, a magnetic field is generated and the disk 2 is exposed to the magnetic field.

Then, by rotating the motor 33 and operating the optical head 30, it is possible to record and erase signals on the disk 2.

Return to the state of the cartridge 1 Figure 8 Figure 8 from the state of (B) (A) is carried out by sliding the slider 4 in the Y ₂ direction, for example by a solenoid or manually.

SUMMARY OF THE INVENTION In the apparatus described above, the coil 8 for loading the cartridge 1 must be separated from the range in which the cartridge 1 moves during loading. That is, the coil 8 is separated from the cartridge 1 after loading (the state shown in FIG. 8B) by the dimension h shown in FIG. 8B. If the distance h is large, the magnetic field supplied from the coil to the disk 2 will be weak. Since the size of h is determined by the shape of the cartridge, there is a limit in reducing the size. To obtain a desired magnetic field on the surface of the disk 2, it is necessary to reduce the size of the coil or the current flowing through the coil. There is a limit. Therefore, there is a problem that there is a limit in reducing the size of the apparatus.

In view of the above problems, the present invention provides a recording / reproducing apparatus capable of moving a magnetic field supply unit with a simple configuration and bringing the magnetic field supply unit close to a disk surface regardless of the size of a space required for loading a cartridge. It is intended to provide.

Means for Solving the Problems In order to achieve this object, the present invention provides an insertion slot for inserting and removing a cartridge containing a recording disk into and from the apparatus main body, and engaging the recording disk in the cartridge with the recording disk. A motor for rotating a disk, cartridge transfer means for transferring the cartridge inserted into the apparatus main body through the insertion port substantially in parallel with a rotation axis of the motor, and a transfer completion position of the cartridge on the recording disk. A magnetic field supply unit for supplying a magnetic field, a flat arm having one end fixed with the magnetic field supply unit, and moving the magnetic field supply unit to a predetermined position in conjunction with movement of the cartridge by the cartridge transfer unit; A rotation driving means including a motor for rotating the arm via a transmission means in a direction parallel to the rotation direction; And a driving means for vertically moving the arm, wherein the arm can be turned or reciprocated along the turning axis.

According to the present invention, when the cartridge is loaded by the transfer means, the magnetic field supply means is retracted from the space through which the cartridge passes during loading, and the magnetic field supply means is attached to one end of the cartridge after the loading is completed. The arm is driven by the arm driving means, and then, when it comes on the disk, it descends to bring the magnetic field supply means close to the disk, and flows into the coil regardless of the size of the space required for loading the cartridge. A desired magnetic field can be obtained on the surface of the disk 2 without being affected by the current.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a cartridge, 2 is a disc,
3 is a cartridge holder, 4 is a slider, 5 is a chassis, 8 is a coil, 9 is a lock portion, 10 is a lock lever,
Reference numeral 11 denotes a spring, and reference numerals 12 and 13 denote pins. These are all exactly the same as those of the above-described conventional example and have the same functions. An optical head similar to the optical head 30 of the conventional example shown in FIG. 7B is located at the same position.

14 is constructed and engaged with the lock portion 9 is attached to the slider 4 by a pin 15 by the solenoid, when energized the slider 4 to draw in the Y ₂ direction. Reference numeral 16 denotes a drive motor as a drive source, reference numeral 18 denotes a worm, reference numerals 19, 20, and 21 denote spur gears which reduce the rotation of the drive motor 16 and transmit the rotation to the gear 22.

Reference numeral 17 denotes a sub-chassis, which includes a drive motor 16, spur gears 19, 20, and 2.
1. Support the gear 22. The sub-chassis 17 is attached to the chassis 5 by columns 24. In FIG. 1, the sub-chassis 17 is shown in perspective for easy understanding. That is, the spur gears 19, 20, and 21 and the gear 22 are configured below the sub-chassis 17. An arm 25 is attached to the gear 22, and the other end is provided with a coil 8 as magnetic field supply means. 23 is a bearing, under which an arm 25
A solenoid 31 for moving up and down in the Z ₁ and Z ₂ directions is attached (see FIGS. 2A and 2B). The bearing 23 supports the arm 25 so as to be rotatable in the directions of the arrows R ₁ and R ₂ in the figure, and is slidable in the directions of Z ₁ and Z ₂ .

2A and 2B, the bearing 23 and the solenoid
The configuration of 31 will be described. The solenoid 31 is fixed to the chassis 5 with a stay 31a. The core 31b of the solenoid 31 is a gear
The boss 22a is attached to the boss 22a. Boss 22a
And the bearing 23 are fitted. A coil spring 32 is mounted between the gear 22 and the bearing 23 along the outer periphery of the boss 22a. Gear 22 and the arm 25 by the coil spring 32 is urged in the arrow Z ₂ direction.

 The operation of the embodiment having the above configuration will be described below.

FIG. 3 to FIG. 6 are explanatory views of the plane operation of the main part. First, FIG. 3 shows a state before the cartridge is loaded into the apparatus. In the figure, a portion surrounded by a chain line (arrow C) is a space into which the cartridge 1 is inserted. As shown in the figure, the arm 25 is separated from the space where the cartridge 1 is inserted. Further, a pin 13 is engaged with the notch 9a of the lock portion 9 of the slider 4 to restrict the movement of the slider 4.

Then the cartridge 1 is brought into a state of Figure 4 when it is put into y ₂ direction. Lock lever 10 at the end of cartridge 1
Is pressed to rotate in the direction of arrow A in the figure, and the pin 13 is cut out 9a.
Out of the way. Then the slider 4 as all predicates is (not biasing means shown) because it is biased in Y ₁ direction slides in the Y ₁ direction. Then, since the slider 4 and the cartridge holder 3 are engaged with each other by the pin 3b and the notch 4a, the cartridge holder 3 descends together with the cartridge 1.

Then, when it is supplied to the motor 16 worm 18 and the spur gears 19 to 21 rotational force is transmitted the gear 22 and the arm 25 by the pivots in the arrow R ₁ direction. At this time, since the cartridge 1 has already been lowered, the arm 25 does not interfere with the cartridge 1. That is, after the cartridge 1 is inserted into the position as shown in FIG. 2 (A), the operation of the slider 4 and the cartridge holder 3 lowers the cartridge to the position as shown in FIG. 2 (B). 25 can rotate without obstacles (see FIG. 5).

Then gear 22 and the arm 25 against the biasing force of is energized to the solenoid 31 a spring 32 is pulled to Z ₁ direction approaching the coil 8 to the disc 2, a state of FIG. 2 (C). In this state, when the motor 33 rotates, the disk 2 rotates and the coil 8 is energized, a magnetic field is supplied on the surface of the disk 1, and the optical head 30 operates to enable recording and erasing of signals on the disk. .

FIG. 6 shows a state in which the cartridge 1 is taken out of the apparatus. The power supply to the solenoid 31 is turned off from the state shown in FIG. Then gear 22 and the arm 25 is raised in the Z ₂ direction by the urging force of the coil spring 32. Then it is energized to the motor 16 in the opposite direction the arm 25 is in a state where the cartridge 1 and the arm 25 do not interfere as FIG. 6 is rotated in the arrow R ₂ direction to that described above.

Finally, when the solenoid 14 is energized, the slider 4 moves to y ₂
The cartridge holder 3 and the slider 4
There cartridge by engaging with the pin 3b and the notch 4a rises Z ₂ direction. This is the state shown in FIG. When the cartridge 1 is taken out y ₁ direction lock lever 10 is notched and the pin 13 is rotated in the arrow B direction in this state
9a engages and returns to FIG. 3, that is, the original state.

The above sequential operation is performed by combining a normal microcomputer, a motor, and a control circuit of a solenoid to form a motor 1
6, 33 and the solenoids 31, 14 are sequentially operated.

Effect of the Invention As described above, the present invention rotates the recording disk by engaging the recording disk in the cartridge with the insertion opening for inserting and removing the cartridge containing the recording disk therein from the apparatus main body. A motor, cartridge transfer means for transferring the cartridge inserted into the apparatus main body through the insertion port substantially in parallel with a rotation axis of the motor, and a magnetic field for supplying a magnetic field onto the recording disk at a transfer completion position of the cartridge Supply means, and movement means for moving the magnetic field supply means to a predetermined position in conjunction with movement of the cartridge by the cartridge transfer means, wherein the movement means comprises a plate-like arm, and has a bottom surface at one end thereof. The magnetic field supply means is fixed, and the other end has a pivot shaft for pivotally supporting the arm. When the cartridge is loaded by the transfer means, the magnetic field supply means is retracted from the space through which the cartridge passes during loading. The arm with the supply means attached to one end is rotated by the drive means, and then descends when it comes onto the disk, and is configured to approach the magnetic field supply means to the disk, thereby connecting to the rotation axis and the rotation axis. With a simple configuration of the driving means, the magnetic field supply means can be approached regardless of the size of the space required for loading the cartridge, and the space can be effectively used. Can be supplied on the surface. Furthermore, since the magnetic field supply means is fixed to the bottom surface of the highly rigid plate-shaped arm, it has a very strong configuration against the movement of the magnetic field supply means and an external impact, and has a very simple configuration. The practical effect is great.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a recording / reproducing apparatus according to an embodiment of the present invention, FIGS. 2 to 6 are side sectional views and plan views for explaining the operation of the apparatus of the embodiment, and FIG. And FIG. 8 is a side view for explaining the operation of the recording / reproducing apparatus. 1 ... cartridge, 2 ... disk (recording disk), 3
…… Cartridge holder, 4… Slider, 5 ……
Chassis, 8 Coil, 9 Lock part, 10 Lock lever, 13 Lock pin, 16 Drive motor, 18
... worm, 19-21 ... spur gear, 22 ... gear, 23 ... bearing, 25 ... arm, 30 ... optical head, 31 ... solenoid.

Continuation of the front page (56) References JP-A-1-143001 (JP, A) JP-A-63-121149 (JP, A) JP-A-62-187402 (JP, U)

Claims (1)

(57) [Claims] An insertion opening for inserting and removing a cartridge containing a recording disk therein into and from the apparatus main body; a motor for rotating the recording disk by engaging with the recording disk in the cartridge; Cartridge transfer means for transferring the cartridge inserted into the apparatus main body substantially in parallel with the rotation axis of the motor; magnetic field supply means for supplying a magnetic field onto the recording disk at a transfer completion position of the cartridge; A magnetic field supply unit is fixed, and a flat plate-shaped arm that moves the magnetic field supply unit to a predetermined position in conjunction with the movement of the cartridge by the cartridge transfer unit, and a transmission unit that transfers the arm in a direction parallel to a rotation axis. A rotation drive unit including a motor for rotating, and a drive unit for vertically moving the arm along a rotation axis of the arm. Recording reproducing apparatus according to claim.