JPH08321144A - Disk device - Google Patents

Abstract

PURPOSE: To reduce the cost and at the same time, improve the quality reliability. CONSTITUTION: A lock arm 13 for canceling the travel regulation and for regulating travel of a carriage 7 by the loading and unloading operations of a disk cartridge D is provided at a base plate 1 so that it freely advances and retreats and the lock arm 13 is energized in a direction for regulating the travel of the carriage 7 by a compression coil spring 20. As the result, the lock arm 13 moves in a direction for canceling the travel regulation of the carriage 7 by the press due to the move in the loading direction of the disk cartridge D and moves in a direction for regulating the travel of the carriage 7 by following the unloading operation of the disk cartridge D, thus obtaining the simplified lock/unlock mechanism as the lock/unlock mechanism of the carriage 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device suitable for use as a magneto-optical disc device for recording and / or reproducing information signals on a magneto-optical disc of a disc cartridge.

[0002]

2. Description of the Related Art In recent years, as means for storing data in a computer or the like, a magneto-optical disk has advantages such as a large data storage capacity, high-speed access, and excellent portability. A disk device using a recording medium as a recording medium has been used.

Such a disc device has a loading / unloading mechanism having a cartridge holder for holding a disc cartridge so that the disc cartridge can be inserted and removed, and a magneto-optical disc of the disc cartridge, which is provided below the loading / unloading mechanism, is suction-held. A rotary drive mechanism having a disc table and a spindle motor for rotationally driving the disc table, an objective lens provided behind the rotary drive mechanism for focusing on a signal recording surface of a magneto-optical disc, and a table diameter of the objective lens. The optical pickup device is roughly composed of an optical pickup device having a carriage that is operated to move in a direction, a magnetic head device having a magnetic head provided above the optical pickup device for applying a magnetic field to a magneto-optical disk, and the like.

Conventionally, in this type of disk device, since it is necessary to prevent damage due to vibration and impact during transportation of the optical pickup device, it is fitted to a pin protruding from the carriage when not in use and used. The one provided with a lock / unlock mechanism having comb teeth for releasing the fitting is adopted.

In the disk device constructed as described above, when the disk cartridge is inserted into the cartridge holder, the loading / unloading mechanism is driven in the loading direction so that the comb teeth of the locking / unlocking mechanism form the pins of the carriage. Operates in a direction away from
When the loading is completed, the locked state of the carriage is released.

On the other hand, when the loading / unloading mechanism is driven in the unloading direction, the comb teeth of the lock / unlock mechanism operate in the direction of fitting to the pins, and the lock state of the carriage is maintained by the completion of the unloading. To be done.

By the way, in this type of disc device, a plurality of optical pickup devices are usually arranged radially around the disc at the disc mounting position for the purpose of increasing the transfer speed.

[0008]

However, since the conventional disk device has a structure in which a link is interposed between the lock / unlock mechanism and the loading / unloading mechanism, the number of optical pickup devices increases. The link length was getting longer.

As a result, there has been a problem that the structure becomes complicated, the cost increases, and the quality reliability decreases.

The present invention has been made in view of the above circumstances, and provides a disk device capable of reducing the cost and improving the reliability in quality.

[0011]

DISCLOSURE OF THE INVENTION In a disk device according to the present invention, movement restriction is released from a carriage of an optical pickup device by a cartridge loading operation and a cartridge unloading operation of a disk cartridge.
A lock arm that regulates movement is provided on the base so that it can move back and forth.
The lock arm is always biased by a spring in a direction in which the movement of the carriage is restricted.

[0012]

According to the present invention, the lock arm moves in the direction in which the movement restriction of the carriage is released by pressing by the movement of the disk cartridge in the loading direction, and in the direction in which the carriage movement is restricted following the unloading operation of the disk cartridge. Moving.

[0013]

Embodiments of the present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view showing a main part of a disk device according to the present invention, FIGS. 2 and 3 are perspective views showing a cartridge loading state and a cartridge unloading state of the disk device according to the present invention, and FIG. 4 is a book. FIG. 5 is a cross-sectional view showing an example in which a plurality of optical pickup devices of a disc device according to the present invention are arranged, and FIG. 5 is a perspective view showing an example in which a lock arm of the disc device according to the present invention is pivotally operated to release movement restriction of a carriage of the optical pickup device. It is a figure.

In FIG. 1, reference numeral 1 is a base plate for mounting optical system components, which is provided in a housing (not shown) for a disk device and is a chassis (not shown).
It is held by the upper seat members 2 via a cushion rubber 3.

The base plate 1 is provided with a recess 1a opening upward and four arm pivots 1b protruding upward in the recess 1a.

An arm rotation restricting shaft (not shown) for restricting the rotation of a lock arm, which will be described later, to the side opposite to the carriage is provided on the base plate 1.

Reference numeral 4 is a disk table which is rotated by a spindle motor (not shown), and is the base plate 1
The magneto-optical disk d of the disk cartridge D can be adsorbed and held in the upper center part.

5, 5 ... Show the disk table 4
4 optical pickup devices having a carriage (described later) that moves back and forth in the radial direction of the magneto-optical disc d at the disc mounting position with respect to the signal recording surface in the disc mounting position. It is configured so that recording / reproducing can be performed by irradiating a laser beam.

Each of these optical pickup devices 5 is a separation optical system in which the movable part is light in weight in order to cope with high-speed access.

That is, each of these optical pickup devices 5 is a fixed optical system having a laser diode serving as a light source used for recording and reproduction, a signal detector used for performing focus and tracking control, a signal detector for detecting a recording signal, and the like. (Not shown), a carriage 7 having an objective lens 6 for focusing laser light from the fixed optical system (not shown) on the signal recording surface of the magneto-optical disk d, and an anti-disk table of the carriage 7. It is composed of a galvanometer mirror (not shown) located on the side and used for performing tracking control.

Of these, each carriage 7 is movably held by two guide shafts 8 which are located around the disk table 4 in the circumferential direction at a predetermined interval and are parallel to each other.

Further, two pairs of bearings 9 are positioned on one side surface portion of each of the carriages 7 with their bearing rotation axes set at an angle of 90 ° with each other, and on the other side surface portion. A pair of bearings 10 are positioned with their bearing axes set at 90 ° to each other.

A linear motor 11 for driving the carriage is provided on both sides of each of the carriages 7.

In each of the carriages 7, one of the bearings 9 and 10 in each pair has a repulsive force in a direction such that the angle between the rotation axes of both bearings in each pair becomes smaller than 90 °. An elastic body (not shown) that imparts is fixed.

Each guide shaft 8 for guiding each of the carriages 7 is attached to the base plate 1 via a fixed frame 12 which holds the fixed optical system (not shown).

Reference numeral 13 denotes a lock arm for restricting carriage movement, which is an arm base portion 14 extending in the vertical direction (arrow a ₁ direction and arrow a ₂ direction) and in which the arm pivot 1b faces the inside.
And a carriage lock portion 15 connected to the arm base portion 14, and is provided in the recess 1a of the base plate 1 so as to be vertically movable and rotatable.

The lock arm 13 is moved downward by the loading operation of the disk cartridge D, that is, the pressing operation of the cartridge D ₁ with respect to the arm base portion 14, to release the movement restriction of the carriage 7, and to unload the disk cartridge D. The carriage 7 is configured to move upward and regulate the movement of the carriage 7 by an operation, that is, a pressing release operation of the cartridge D ₁ with respect to the arm base portion 14.

The arm base 14 of the lock arm 13
Is a cylindrical portion 14 having two sizes, one large and one small.
a, 14b and a stepped portion 14c interposed between the two tubular portions 14a, 14b, the arm pivot 1a is formed by a cylindrical body facing the inside.

On the other hand, the carriage lock portion 15 of the lock arm 13 has two arm pieces 15a and 15b connected to the arm base 14 and both arm pieces 15a and 1b.
It is formed by a frame body having a substantially triangular shape in a plan view, which has an arm piece 15c connecting the 5b.

The arm piece 1 of the carriage lock portion 15
5a is provided with an arm movement restrictor 16 which is substantially circular in plan view and which protrudes in the vicinity of the arm base 14 and restricts the arm movement in the direction opposite to the base direction (arrow a ₁ direction).

Further, at a portion where the arm piece 15a and the arm piece 15c of the carriage lock portion 15 intersect with each other, the carriage 7 protrudes upward and is in the carriage retreat position.
There is provided a carriage movement restricting piece 17 having a substantially quadrangular shape in plan view for restricting the movement in the table direction (movement in the direction of arrow c).

The arm piece 15b of the carriage lock portion 15 is provided with two rotation restrictors 18 and 19 projecting upward at the end opposite to the arm base portion 14.

The dimension of the arm piece 15b in the height direction is set to be larger than the dimension of the arm pieces 15a and 15c in the height direction.

As a result, when the lock arm 13 is pressed and rotated, the arm piece 15b is pressed and brought into contact with the lower end surface of the fixed frame 12 by a compression coil spring, which will be described later, so that the carriage 7 is released from the movement restriction. Retained.

Of the two rotation restrictors 18, 19 of the arm piece 15b, the carriage-side arm rotation restrictor 18 is included.
Is formed by a protrusion having a substantially circular shape in plan view for restricting the arm rotation in the arrow b ₁ direction which is located outside the fixed frame 12 and approaches the carriage 7 when the carriage 7 is in the movement restricting state. There is.

On the other hand, the arm rotation restrictor 19 on the side opposite to the carriage is located outside the fixed frame 12 in the movement restricting state and the movement restricting released state of the carriage 7 in the direction of the arrow b ₁ approaching the carriage 7. It is formed by a protrusion having a substantially rectangular shape in plan view for restricting the arm rotation.

The dimension in the height direction of the arm rotation restrictor 19 (the dimension in the urging force of the compression coil spring described later)
Is larger than the height of the arm rotation restrictor 18a.

As a result, the arm rotation restrictor 19 is displaced outside the fixed frame 12 by the rotation of the lock arm 13 in the directions of the arrows b ₁ and b _{2 when} the movement restriction of the carriage 7 is released. The rotation restrictor 18a is configured to be displaceable inside and outside the fixed frame 12.

The lock arm 13 having the arm rotation restrictor 19 and the arm rotation restrictor 18 is
In the carriage movement restriction released state, the arm rotation restriction shaft (not shown) restricts the rotation in the direction of the arrow b _{2 which is} separated from the carriage 7.

Reference numeral 20 is a compression coil spring having a biasing force in the directions of arrows a ₁ and a ₂ , which is provided around the arm pivot 1b and between the step 14c of the arm base 14 and the upper surface of the base plate 1. It is mounted on.

The compression coil spring 20 constantly urges the lock arm 13 in such a direction as to restrict the movement of the carriage 7.

A magnetic head device (not shown) for applying a magnetic field to the magneto-optical disc d is provided above each of the optical pickup devices 5 so as to be movable up and down.

In the disk device constructed as described above, when the disk cartridge D moves in the loading direction (arrow a ₂ direction), the arm base 14 of the lock arm 13 is pressed downward, and in conjunction with this pressing operation. The lock arm 13 moves downward (in the direction of arrow a ₂ ) to release the movement restriction of the carriage 7.

At this time, the carriage movement restricting piece 17 of the carriage lock portion 15 is displaced below the carriage 7 to hold the state where the movement restriction of the carriage 7 is released.

On the other hand, when the disk cartridge D moves in the unloading direction (the direction of arrow a ₁ ), the lock arm 13 follows this moving operation by the elastic force of the compression coil spring 20 and restricts the movement of the carriage 7 ( moves in the arrow a ₁ direction).

At this time, the carriage movement restricting piece 17 of the carriage lock portion 15 is displaced forward of the carriage 7 (on the side of the disk table) to maintain the state of restricting the movement of the carriage 7 in the table direction (arrow c direction). .

Therefore, in the present embodiment, the carriage 7 can be restrained from moving and restrained from movement by unloading operation and loading operation of the disk cartridge D, so that the lock / unlock mechanism of the carriage 7 is simplified. A lock / unlock mechanism can be obtained.

Also, in this embodiment, the lock arm 1
Fixing frame 3 by pressing arm 3 and rotating arm 3
The configuration in which the state in which the movement regulation of the carriage 7 is released can be held by pressing the lower edge of the carriage 2 into contact with the lower edge of the carriage 2 allows the movement regulation of the carriage 7 to be released manually.

In the present embodiment, the example applied to the magneto-optical disk device is shown, but the present invention is not limited to this, and it goes without saying that it can be applied to the optical disk device in the same manner as the embodiment. is there.

[0051]

As described above, according to the present invention, the carriage of the optical pickup device is provided with the lock arm for releasing and restricting the movement by the cartridge loading operation and the cartridge unloading operation of the disk cartridge so that the carriage can move forward and backward. Since the lock arm is always biased by the spring in the direction in which the movement of the carriage is restricted, the lock arm moves in the direction in which the movement restriction of the carriage is released by the pressing by the movement in the loading direction of the disk cartridge, and Following the unloading operation of the cartridge, the carriage moves in the direction in which movement is restricted.

Therefore, since the carriage movement can be restricted / moved by the unloading operation and the loading operation of the disk cartridge, a simplified lock / unlock mechanism can be obtained as the lock / unlock mechanism of the carriage. Therefore, the cost can be reduced, and the reliability in quality can be improved.

According to the present invention, the lock arm is constituted by a lock arm capable of holding a state in which the carriage movement restriction is released by the arm pushing operation and the arm rotation operation. Therefore, it is possible to perform recording / reproduction by using the optical pickup device under the condition that the cartridge loading / unloading mechanism or the disk cartridge is not used at the time of assembly and adjustment.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a disk device according to the present invention.

FIG. 2 is a perspective view showing a cartridge loading state of the disc device according to the present invention.

FIG. 3 is a perspective view showing a cartridge unloading state of the disk device according to the present invention.

FIG. 4 is a perspective view showing an example in which a plurality of optical pickup devices of the disk device according to the present invention are arranged.

FIG. 5 is a perspective view showing an example in which the lock arm of the disk device according to the present invention is rotationally operated to release the movement restriction of the carriage of the optical pickup device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base plate 1b ... Arm pivot axis 4 ... Disk table 5 ... Optical pickup device 6 ... Objective lens 7 ... Carriage 13 ... Lock arm 14 ... Arm base 15 ... Carriage lock part 17 ... Carriage movement restricting piece 20 ... Compression coil spring D ... Disk Cartridge d ... Magneto-optical disk

Claims (6)

[Claims] 1. A disc table rotatably provided on a base for adsorbing and holding a disc of a disc cartridge, an objective lens provided in a radial direction of the disc table for converging on a signal recording surface of the disc, and the objective. And an optical pickup device having a carriage for moving the lens in the radial direction of the table, and a lock arm for moving the carriage of the optical pickup device by the unloading operation and the loading operation of the disc cartridge to release the movement restriction from the base. A disk device, wherein the lock arm is always urged by a spring in a direction that restricts movement of the carriage. 2. The disk device according to claim 1, wherein the lock arm is provided with a carriage movement restricting piece for restricting carriage movement in the table direction. 3. The disk device according to claim 1, wherein the lock arm is provided with an arm movement restrictor for restricting arm movement in a direction opposite to the base direction. 4. The disk device according to claim 1, wherein the lock arm is constituted by a lock arm capable of holding a state in which the movement restriction of the carriage is released by an arm pressing operation and an arm rotating operation. 5. The disk device according to claim 4, wherein the lock arm is provided with two arm rotation restrictors for restricting arm rotation in a movement restriction state of the carriage. 6. A dimension of the carriage-side arm rotation restrictor in the spring biasing force direction is set to be smaller than a dimension of the anti-carriage-side arm rotation restrictor in the spring biasing force direction of the both arm rotation restrictors. 6. The disk device according to claim 5, wherein the disk device is a disk device.