JP2899169B2 - Optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for recording and reproducing information signals on an information recording medium such as an optical disk or a magneto-optical disk housed in a cartridge.

[0002]

2. Description of the Related Art Conventionally, in such an optical disc apparatus, an optical system including an objective lens and a driving means for the same are mounted on a carriage in order to record and reproduce information by optical means. A linear-type voice coil motor is adopted so as to move between them.

In this case, a lock mechanism is provided for restricting the free movement of the carriage when the optical disk device is put in a non-operation state or when the device is transported.

[0004] For example, as shown in FIG.
1 on one side in a direction in which the carriage moves.
2 is extended, and a lock claw 43 meshing with this is rotatably disposed on the device frame 44 side.

Here, when a cartridge holder (not shown) or the like for transporting the disk cartridge is moved up and down, a lock claw 43 is rotated and meshes with a rack 42 provided on the carriage, so that the carriage 41 moves relative to the apparatus frame. Become immovable. Therefore, the carriage does not move freely in response to external vibration or impact, and the reliability of the optical system components mounted on the carriage can be maintained.

In the case of the conventional example shown in FIG. 8, since the lock claws are provided in the entire movable range of the carriage, the position of the carriage is regulated regardless of the inner peripheral side and the outer peripheral side of the disk. It is possible.

In the above-described optical disk device, an external magnetic field generator is required for recording / reproducing information on / from the magneto-optical disk. Recently, a so-called flying magnetic head is often used as the external magnetic field generator. The flying magnetic head has a core and a coil for generating a magnetic field wound in the core. The air of the core of the flying magnetic head is drawn into the air film between the core and the rotating optical disk to form an air film, thereby forming a minute gap with respect to the disk. It is configured as follows.

The external magnetic field generator is supported by a rotatable arm so that the external magnetic field generator can be moved toward and away from the optical disk.

[0009]

However, the above-mentioned conventional optical disk device has the following problems.

(1) Since the lock claws 43 extend in the moving direction of the carriage, the lock claws 4 of the carriage
Since the linear type voice coil motor cannot be disposed on the side where the motor 3 is provided, there is a problem that it is difficult to increase the driving of the carriage and the driving balance is deteriorated.

(2) At the time of loading, unloading and ejecting the disk, it is necessary to rotate the arm to separate the external magnetic field generator from the disk so as not to hinder each of these operations. When the rotation angle is large, the device configuration becomes complicated, and it is difficult to reduce the device configuration.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can improve the driving force of the carriage and the driving balance. It is an object of the present invention to provide an optical disk device capable of separating a magnetic field generator from a disk.

An object of the present invention is to hold a cartridge containing an optical disk, raise the cartridge when the cartridge is inserted horizontally from the outside of the apparatus, and determine when the disk is mounted on a disk table. A cartridge holder that moves up and down between a lowered position, a carriage mounted with an optical head for recording or reproducing information on the disc, and movable in a radial direction of the disc along a guide rail; An external magnetic field generating means supported at an end of the arm so as to be movable toward and away from the disk by the rotation of the arm; and an external magnetic field generating means for connecting the arm to the arm. In an optical disc device having a spring biasing in a direction approaching a disc, the disc holder is provided with a disc. Provided with an inclined portion inclined to become lower toward the outer periphery of the click away from the inclined portion when the cartridge holder is in the lowered position to the arm,
When the cartridge holder is at the raised position, a bearing is provided to contact the inclined portion, and when the cartridge holder is at the lowered position, the arm is urged by a spring to hold the external magnetic field generating means at a position close to the disk,
When the cartridge holder rises, the bearing comes into contact with the inclined portion and pushes up the arm against the urging force of the spring, holding the external magnetic field generating means away from the disk, and the bearing repels the inclined portion by the repulsive force of the spring. This is achieved by an optical disk device that slides and moves the carriage in the outer peripheral direction of the disk and holds it.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to FIGS.

Reference numeral 1 denotes a disk-shaped recording medium, and reference numeral 2 denotes a cartridge containing the medium, and a shutter 3 is slidably supported. The cartridge 2 is vertically moved up and down between an insertion position (ascending position) at which the cartridge 2 is inserted horizontally and a mounting position (down position) at which the disk-shaped recording medium 1 in the inserted cartridge 2 is mounted on a disk table. And a holder 4.

An L-shaped shutter opening / closing lever 22 is attached to the upper surface of the holder 4 so as to be rotatable about a fulcrum 4c in the direction of the arrow bb '. The shutter opening / closing lever 22 is urged in the direction b 'by the coil spring 23.

The apparatus frame (not shown) includes a spindle motor 5 for rotating the disk and a guide rail 1.
2 (FIG. 4) is provided, and the carriage 6 is
Guided by 2. An optical pickup 7 including an objective lens is mounted on the carriage 6. The linear voice coil motor 8 (only the coil portion is shown) has a part thereof mounted on the carriage 6 and moves the carriage 6 freely in the directions of arrows aa ′.

The flying magnetic head 10, which is an external magnetic field generator, has a fulcrum 6a provided behind the carriage 6.
Is supported by a support arm 9 that can rotate in the direction of the arrows cc ′ around the center, and is constantly urged in the c direction by the torsion spring 11. On one side of the support arm 9, a bearing 9a is provided at a position where the bearing 9a comes into contact with an inclined portion 4a provided by bending a part of the holder 4. The inclined portion 4a is inclined downward toward a later-described regulating position side of the carriage so as to roll in the bearing 9aa direction (the outer peripheral direction of the disk).

A guide cam 20 for moving the holder 4 up and down when the cartridge 2 is mounted and ejected is inserted through four positioning pins 21 erected on the apparatus frame so as to be slidable in the directions of arrows aa '. , But is always urged in the a ′ direction by two tension coil springs 25.

Further, a guide cam pin 20a protrudes behind the guide cam 20. This guide cam pin 2
In the position after the ejection (FIG. 5), the hook 0 is engaged with the trigger arm 24 rotatably supported by the apparatus frame, and holds the guide cam 20. Further, there is a torsion spring 25 for urging the trigger arm 24, which is urged in the direction of arrow d '.

Next, the operation of the above configuration will be described.

1 and 4 show a state after the cartridge 2 is mounted, the holder 4 is at a mounting position (down position), the disk-shaped recording medium 1 is mounted on a turntable of a spindle motor 5, and information is recorded and reproduced. Is possible.
In this state, the inclined magnetic head 10 serving as an external magnetic field generator is provided with the inclined portion 4a provided to be bent in the holder 4.
The bearing 9a, which is press-fitted into the support arm 9 that supports the shaft, is adjusted in the height direction so as not to come into contact with the bearing 9a. Therefore, the carriage 6 can be freely moved in the direction of the arrow aa 'by the near voice coil motor 8. The position of the carriage in FIG. 1 is a position when accessing at the innermost circumference of the disk recording surface. However, the flying magnetic head 10 is in a notch provided in the cartridge 2 when the shutter 3 is opened. Therefore, there is no contact with the edge of the cartridge.

FIG. 2 shows that the cartridge 2 is unloaded or ejected at the position of the carriage 6 in FIG. Here, the guide cam 20 moves by being externally operated or pushed in the direction of arrow a by an eject motor (not shown) provided on the guide cam 20, and provided on the guide cam 9 at this time. The holder 4 is raised by moving four support shafts 4b provided on the side surface of the holder 4 on the guide groove (not shown).

When the holder 4 rises, the standing bent portion 4a and the bearing come into contact with each other, and the support arm 9 is rotated in the direction of arrow c 'against the torsion spring 11. Therefore, the flying magnetic head 10 fixed to the support arm 9
Also rotates and separates from the disk 1.

At this time, if the linear voice coil motor 8 is not energized and the carriage 6 is free, the holder 4
Since the vertical bent portion 4a is inclined, the carriage 6 starts to move toward the outer diameter side of the disk (in the direction of arrow a) by the component force of gravity. Further, since the support arm 9 is urged in the direction of arrow c by the torsion spring 11, the reaction force of the torsion spring 11 causes the carriage 6 to move in the direction of arrow a. In this manner, the carriage 6 advances in the direction of arrow a by the combined force of both, and reaches the position shown in FIG.

At the position shown in FIG. 3, the carriage abuts against the stopper portion 14 provided on the apparatus frame. Even in this state, the force in the direction a is applied by the combined force. Does not move,
This means that the device frame is regulated. FIG. 5 is a plan view of the state where the cartridge 2 is discharged at this position, which is also a state when the cartridge is inserted.

(Other Embodiments) As the second embodiment, as shown in FIG. 6, the external magnetic field generator can be applied not only to the floating magnetic head but also to other external magnetic field generators. .

Reference numeral 15 denotes a yoke made of a material such as electromagnetic soft iron. The yoke 15 is wound with a coil 16 for generating a magnetic field, and is fixed to the support arm 9 at a certain distance from the optical disc 1. ing. Further, since the support arm 9 is rotatably supported by the fulcrum 6a of the carriage 6, the external magnetic field generator in this embodiment is also moved with respect to the disk 1 simultaneously with the carriage 6.

Therefore, in the second embodiment shown in FIG. 6, similarly to the first embodiment, the carriage 6 moves in the direction of the arrow a by the rise of the holder 4, and is regulated with respect to the chassis. Will be.

As a third embodiment, as shown in FIG. 7, the floating magnetic head shown in the first embodiment and the fixed magnetic field generator shown in the second embodiment are used as the external magnetic field generator. Two devices are provided.

Therefore, in the third embodiment shown in FIG. 7, similarly to the first embodiment, the carriage 6 moves in the direction of the arrow a by the rise of the holder 4, and is regulated with respect to the chassis. Will be.

Here, regarding the third embodiment, the inclined portion 4a of the holder 4 is not necessarily required at two places on both sides.
It is clear that the carriage 6 may be moved at one place on one side.

In this embodiment, a part of the cartridge holder is bent up to form an inclined portion. However, the same effect can be obtained by disposing another member (for example, a guide rail) in the holder in an inclined manner.

The embodiments of the present invention have been described above.
The present invention is not limited to the embodiments described above, and various effective changes can be made based on the technical idea of the present invention.

[0035]

In the optical disk apparatus according to the present invention described above, the arm supporting the external magnetic field generator and the cartridge holder are provided when the cartridge holder for lifting the disk is raised. The rotating part of the arm moves away from the center of the disk, so that even if the rotation angle is small, the arm and the disk do not interfere with each other. Since the external magnetic field generator can be retracted, the apparatus can be made thinner and smaller. Further, since there is no lock mechanism on the side of the carriage, linear voice coil motors can be provided on both sides of the carriage, so that it is possible to improve the drive of the carriage and the drive balance.

[Brief description of the drawings]

FIG. 1 is a side view showing a state after a cartridge is loaded in a first embodiment of an optical disk device of the present invention;

FIG. 2 is a side view showing a state after unloading a cartridge in the apparatus shown in FIG. 1;

FIG. 3 is a side view showing a state after a carriage is moved by the apparatus shown in FIG. 1;

4 is a plan view of the apparatus shown in FIG. 2,

5 is a plan view of the apparatus shown in FIG. 3,

FIG. 6 is a side view showing a state after loading a cartridge in a second embodiment of the optical disk device of the present invention;

FIG. 7 is a side view showing a state after loading a cartridge in a third embodiment of the optical disk device of the present invention;

FIG. 8 is a plan view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc-shaped recording medium 2 Cartridge 4 Cartridge holder 4a Inclined part provided in cartridge holder 5 Spindle motor 6 Carriage 9 Support arm 10 External magnetic field generator

Claims (1)

(57) [Claims] 1. A cartridge containing an optical disc is provided.
Hold and insert the cartridge horizontally from outside of the device
When the disc is raised, and the disc is
Move up and down between the lowered positions when mounted on the
Cartridge holder to record information on the disc
Or equipped with an optical head for playback,
Carrier that can move in the radial direction of the disc along the
And an carriage rotatably mounted on the carriage.
Arm and the end of the arm
External magnet supported movably to the disk
Field generating means and an external magnetic field generating means for disposing the arm.
Optical disc having a spring biasing in a direction approaching the
In the disk device, a disk is stored in the cartridge holder.
Provide a sloping portion that is inclined so as to become lower toward the outer circumference of
With the cartridge holder lowered to the arm
Away from the ramp when the cartridge holder is
When in the raised position, install the bearing that
When the cartridge holder is in the lowered position,
The arm is urged by a spring to deactivate the external magnetic field generation means.
The cartridge holder close to the disk
When ascending, the bearing abuts the slope and the spring
Push up the arm against the urging force to generate an external magnetic field
And the spring repulsion force
The bearing slides on the slope, causing the
Moving the disk toward the outer circumference of the disc and holding it.
Optical disc device.