JPH08190758A - Disk device - Google Patents

Abstract

PURPOSE: To guarantee the cartridge holding ability against vibration or impact. CONSTITUTION: A coil holder 23 of an external magnetic field generator 22 is formed in such a manner that the disk cartridge D at the cartridge loaded position is thereby allowed to be pressed while being always turnably energized to the side of the cartridge loaded position so that a part of the coil holder is fronted onto the cartridge holder 13 inside by extension coil springs 30, 31. Therefore, the sufficient pressing force is imparted to the disk cartridge D at the cartridge loaded position by the coil holder 23, because the force such as turning the coil holder 23 against the repulsive force of the extension coil springs 30, 31 is exerted to the coil holder 23 at the time of disk loading from the disk cartridge D at the cartridge loaded position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for recording / reproducing information on / from a recording medium such as a magneto-optical disk or a magnetic disk.

[0002]

2. Description of the Related Art Generally, a magneto-optical disk device is known as a disk device for writing and / or reading an information signal to / from a disk rotatably housed in a disk cartridge.

This is a cartridge loading mechanism having a cartridge holder for holding a disc cartridge so that the disc cartridge can be inserted and removed, a disc table provided under the cartridge loading mechanism for attracting and holding a magneto-optical disc, and the disc table is driven to rotate at a high speed. A rotary drive mechanism having a spindle motor, an optical pickup device provided behind the rotary drive mechanism and having an objective lens, and an external magnetic field for applying a magnetic field to a magneto-optical disc at a disc loading position provided above the optical pickup device. It is roughly composed of a generator and the like.

In the magneto-optical disk device thus constructed, after the disk cartridge is conveyed to a predetermined cartridge loading position, the magneto-optical disk is rotatably operated near the cartridge loading position (disk loading position). Information signals are written to and read from the magnetic disk.

Conventionally, a disk device of this type is equipped with two leaf springs for urging both side edges of a disk cartridge to be inserted into a cartridge holder toward a cartridge loading position.

In such a disc device, the holding posture of the disc cartridge is corrected by both leaf springs.

By the way, since the disc cartridge mounted in this type of disc device has advantages such as excellent accessibility and portability, it is also considered to be applied to a portable video camera. It is necessary for the disc device to secure the holding force of the disc cartridge at the cartridge loading position and to give sufficient consideration to vibration and impact.

[0008]

However, in the conventional disk device, since the leaf spring has a structure in which a part of each leaf spring faces the cartridge holder, the leaf spring is set to have a high resilience. However, the holding power of the disc cartridge could not be secured.

That is, in order to secure the holding force of the disc cartridge, it is necessary to increase the elastic force of the leaf spring. However, when the elastic force of the leaf spring is increased, the cartridge is attached to the disc cartridge in the cartridge holder. This is because the acting force that hinders the insertion / removal becomes large and the insertion / removal of the disk cartridge cannot be performed smoothly.

Therefore, there has been a demand for the appearance of a disk device capable of ensuring the holding power of the disk cartridge in the cartridge loading state without being obstructed by the insertion and removal of the disk cartridge.

The present invention has been made in order to meet such a demand, and the magnetic field generator holder is provided at a position so as to avoid contact with the disc cartridge when the cartridge is inserted and removed, and the cartridge when the disc is loaded. Paying attention to the fact that the movement stroke of the holder is set to a stroke slightly larger in the height direction than the movement stroke of the disc cartridge, the magnetic field generator holder that receives the repulsive force of the spring is sufficient for the disc cartridge at the cartridge loading position. You can apply a pressing force,
Accordingly, the present invention provides a disk device capable of guaranteeing the cartridge holding ability against vibration and shock.

[0012]

DISCLOSURE OF THE INVENTION A disk device according to the present invention has a cartridge holder that advances and retreats when a disk cartridge is inserted and withdrawn, and a magnetic field generator holder that rotates by the advancing and retracting operation of the cartridge holder. An external magnetic field generator for applying a magnetic field is provided, and the holder of the external magnetic field generator is constantly urged to rotate toward the cartridge loading position by a spring so that a part of the holder faces the inside of the cartridge holder. It consists of a holder that can press.

[0013]

According to the present invention, after the disc cartridge moves to the cartridge loading position when the disc is loaded and the cartridge holder moves to the holder loading position, the magnetic field generator holder causes the disc inside the cartridge loading position to reach the cartridge loading position. The cartridge receives a force acting to rotate against the elastic force of the spring.

[0014]

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

FIG. 1 is a perspective view showing a disc device according to the present invention, and FIGS. 2A and 2B are sectional views showing the disc unloading state and the disc loading state of the disc device according to the present invention.

In FIG. 1, reference numeral 1 denotes a chassis having a U-shaped cross-section, side plates 1a and 1b facing each other with a predetermined interval, and a bottom plate 1c interposed between these side plates 1a and 1b. A bottom plate 1c and a back plate 1d connected to the both side plates 1a and 1b are connected to each other, and a top cover 2 for protecting the components for the disk device is attached to the upper end thereof.

The side plates 1a and 1b of the chassis 1 are
Two front and rear guide slits 3 and 4 extending in the vertical direction are provided.

On the bottom plate 1c of the chassis 1,
A disk table 5a for attracting and holding the magneto-optical disk d of the disk cartridge D and a spindle motor (not shown) for driving the disk table 5a to rotate at high speed.
Is provided with a rotary drive mechanism 5.

At the center of the upper edge of the rear plate 1d of the chassis 1, there are provided two support pieces 6 and 7, which are opposed to each other at a predetermined distance in the left-right direction. Below 7 is a through hole 8 that opens in the left-right direction.
Spring locking pieces 8, 9 having a, 9a are provided.

Reference numeral 10 denotes a U-shaped slide plate having side plates 10a and 10b facing the side plates 1a and 1b, which is provided in the chassis 1 and is moved back and forth by inserting / removing a disk cartridge D into / from a cartridge holder described later. It is configured to move back and forth in the direction (cartridge insertion / removal direction).

Each side plate 10a, 10 of this slide plate 10
Two front and rear cam grooves 11, 1 having inclined slits 11a, 12a having a downward slope from the front side (cartridge pull-out side) to the rear side (cartridge insertion side) are shown in b.
2 are provided.

Reference numeral 13 denotes a cartridge holder having a cartridge insertion / removal opening 13a, which is provided inside the slide plate 10 and can be moved up and down between a holder loading position and a holder unloading position by inserting / removing the disk cartridge D. ing.

The cartridge holder 13 has an internal space C sufficient for inserting and removing the disc cartridge D.

The clearance G in the height direction when the cartridge is inserted into the cartridge holder 13
Is set to be approximately equal to the height difference between the holder movement stroke and the cartridge movement stroke.

The ceiling plate 13b of the cartridge holder 13 is formed with an opening window 14 extending from the center of the holder toward the rear edge of the holder, and each side end surface 13c (only one is shown). Two support pins 15 and 16 juxtaposed in parallel with each other in the front-rear direction at a predetermined interval.

The support pins 15 and 16 correspond to the guide slits 3 and 4 and the cam groove 11, respectively.
12 is inserted.

Reference numerals 17 and 18 denote two arms which are parallel to each other, each central portion of which is connected to each other by a connecting piece 19, and each rear end portion of which is connected to the supporting pieces 6 and 7 by a pivot pin 2.
It is rotatably held via 0 and 21.

Spring holding holes 17a and 18a, which are opened in the left and right direction of the chassis and correspond to the through holes 8a and 9a of the spring holding pieces 8 and 9, are provided at the ends of the arms 17 and 18 on the holding side. There is.

Reference numeral 22 denotes an external magnetic field generator for applying a magnetic field having a specific polarity to the disk d of the disk cartridge D, which is in the shape of a rectangular box which is rotated by the rotation of the arms 17 and 18 when the cartridge holder 13 is moved up and down. The coil holder 23, the core 24 built in the coil holder 23, and the coil 25 wound around the core 24.

Of these, the coil holder 23 has a casing 26 having flanges 26a and 26b projecting forward and backward, respectively, and a cross sectional view for protecting the core 24 and the coil 25 mounted in the casing 26. It is composed of a U-shaped lid 27, and is provided at a position where it avoids contact with the disc cartridge D when the cartridge is inserted and removed, and the left and right side ends of the holder are the arms 17, 18 respectively.
Is rotatably held at the end portion on the side opposite to the holding side via pivot pins 28 and 29.

Further, in the coil holder 23, the lower end portion of the casing 26 is accommodated in the cartridge holder 13 by the extension coil springs 30 and 31.
It is always urged to rotate toward the cartridge loading position side so as to face from 4.

In the coil holder 23, when the cartridge holder 13 is unloaded, the flange portions 26a and 26b of the casing 26 are pressed against the upper and lower edges of the opening window 14, while the cartridge holder 13 is unloaded. In the holder loading state of the holder 13, the collar portions 26a and 26b of the housing 26 are configured to be spaced from the upper surfaces of the front and rear edges of the opening window 14 and to be able to press the disc cartridge D at the cartridge loading position. .

The tension coil springs 30 and 3 are
1 is a spring locking hole 17 of the arms 17 and 18.
a, 18a and the through hole 8 for the spring locking pieces 8, 9
It is locked to a and 9a.

An optical pickup device (not shown) having an objective lens (not shown) facing the recording surface of the magneto-optical disc d is provided below the disc cartridge D at the cartridge loading position so as to be movable back and forth. ing.

The disk loading of the disk cartridge D in the disk device thus constructed is
Disc cartridge D in the cartridge holder 13
Is done by inserting.

That is, when the disc cartridge D is inserted into the cartridge holder 13 as shown in FIG. 2 (A), the slide plate 10 is released from the locked state and the forward movement is caused by the repulsive force of the tension coil spring (not shown). Move to (cartridge pull-out direction), slide plate 1
By the forward movement of 0, the cartridge holder 13 and the disc cartridge D are lowered to the holder loading position side and the cartridge loading position side, respectively.

At this time, the support pins 15 and 16 move downward along the guide slits 3 and 4 and the cam grooves 11 and 12, and the coil holder 23 follows the lowering operation of the cartridge holder 13 together with the arms 17 and 18. And pivots about the pivot pins 20 and 21 in the direction of arrow a.

Then, as shown in FIG. 2B, the cartridge holder 13 and the disc cartridge D are moved and reached the holder loading position and the cartridge loading position, respectively, and the magneto-optical disc d is placed at the disc loading position. Positioned on the table 5a.

In this case, since the movement stroke of the cartridge holder 13 is set to a movement stroke slightly larger in the height direction than the movement stroke of the disc cartridge D, after the disc cartridge D reaches the cartridge loading position, the cartridge is moved. As the holder 13 moves to the holder loading position, as shown in FIG. 2B, the housing 26 of the coil holder 23 moves from the disk cartridge D in the cartridge holder 13 to the tension coil springs 30 and 31 at the cartridge loading position. Each collar portion 26 of the coil holder 23 receives an acting force that rotates in the direction of the arrow b around the pivot pins 20 and 21 as a rotation center against the elastic force.
a and 26b are separated from the upper surfaces of the front and rear edges of the opening window 14.

Therefore, in this embodiment, the coil holder 23, which receives the elastic force of the tension coil springs 30 and 31, can apply a sufficient pressing force to the disc cartridge D at the cartridge loading position. The holding force of the disc cartridge D can be secured in the loading state.

In this embodiment, since the entire coil holder 23 is provided at a position that avoids contact with the disc cartridge D when the cartridge is inserted or removed, the coil holder 23 allows the disc cartridge to be inserted into the disc holder 13. The insertion (insertion / removal) of D is not hindered.

Incidentally, the unloading of the disc cartridge D is performed by pulling the disc cartridge D out of the cartridge holder 13.

That is, when the disk cartridge D is pulled out of the cartridge holder 13 (eject button is pressed), the slide plate 10 moves backward (in the cartridge insertion direction) against the elastic force of the tension coil spring (not shown). When the slide plate 10 moves backward, the cartridge holder 13 and the disc cartridge D move to the holder unloading position and the cartridge unloading position.

In the present embodiment, an example has been shown in which the coil holder 23 directly presses and contacts the disc cartridge D to secure the cartridge holding force, but the present invention is not limited to this and the coil holder 23 is not limited to this. (Not shown) is a disk cartridge D via an elastic body such as rubber.
It is also possible to secure the cartridge holding force by pressing against the disk holder. In this case, the impact can be partially absorbed by the elastic body when the coil holder is pressed against the disk cartridge.

In this embodiment, the coil holder 23 is in surface contact with the disk cartridge D. However, the present invention has a plurality of cartridge pressing protrusions (not shown) on the coil holder 23. The point contact may be made by providing an individual piece.

Besides, in the present embodiment, an example in which the present invention is applied to a disk device that handles the disk cartridge D which does not have an opening partly exposed by the coil holder 23 and a shutter for opening and closing the opening part is shown. The present invention is not limited to this, and can be applied to a disk device that handles a disk cartridge having an opening part of a coil holder and a shutter for opening and closing the opening part, as in the embodiment.

In this case, for example, both ends of the coil holder (not shown) are provided with protrusions for pressing the cartridge and extending portions for avoiding contact of the disc holder in the disc loading state. ing.

[0048]

As described above, according to the present invention, the magnetic field is applied to the disk of the disk cartridge, which has the cartridge holder which moves forward and backward by inserting and removing the disk cartridge and the magnetic field generator holder which rotates by the forward and backward movement of the cartridge holder. An external magnetic field generator for applying a magnetic field is applied, and the holder of the external magnetic field generator is constantly urged to rotate toward the cartridge loading position by a spring so as to partially face the inside of the cartridge holder and presses the disc cartridge at the cartridge loading position. Since it consists of a possible holder, the magnetic field generator holder will move as the cartridge holder moves to the holder loading position after the disk cartridge moves to the cartridge loading position during disk loading. There receives such a force that rotates against the disc cartridge in the cartridge holder resilience of the spring.

Therefore, since the magnetic field generator holder which receives the elastic force of the spring can apply a sufficient pressing force to the disc cartridge at the cartridge loading position, the disc cartridge holding force is ensured in the cartridge loading state. Therefore, the cartridge holding ability against vibration and shock can be guaranteed.

[Brief description of drawings]

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

2A and 2B are cross-sectional views showing a disc unloading state and a disc loading state of the disc device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chassis 13 ... Cartridge holder 14 ... Opening window 17, 18 ... Arm 22 ... External magnetic field generator 23 ... Coil holder 25 ... Coil 26 ... Housing 26a, 26b ... Collar part 30,31 ... Tensile coil spring D ... Disk cartridge

Claims (2)

[Claims] 1. A cartridge holder that advances and retreats when a disc cartridge is inserted and removed, and an external magnetic field generator that has a magnetic field generator holder that rotates when the cartridge holder advances and retracts, and that applies a magnetic field to the disc of the disc cartridge. The holder of the external magnetic field generator is composed of a holder which is constantly urged to rotate toward the cartridge loading position by a spring so as to partially face the inside of the cartridge holder and which can press the disk cartridge at the cartridge loading position. Disk device. 2. The disk device according to claim 1, wherein the magnetic field generator holder is provided with an extending portion having a protrusion for pressing a cartridge.