JPH0644713A - Disk device - Google Patents

Abstract

PURPOSE:To thin a disk device. CONSTITUTION:This device is provided with a lever 71 imparting separation/ connection moving force for the main body 63 of an external magnetic field imparting device to the back yoke 64 of the external magnetic field imparting device 60 in a magneto-optical disk, etc., in a casing. Thus, when a cartridge holder 9 is lowered at the time of loading a disk, the back yoke 64 is transferred and operated in a direction perpendicular to holder elevational operation by the lever 71, and the main body 63 is connected with the back yoke 64. On the other hand, when the cartridge holder 9 is raised at the time of unloading the disk, the back yoke 64 is transferred and operated in the direction perpendicular to holder elevational operation by the lever 71, and the main body 63 is separated from the back yoke 64. Thereby, a size in the casing in a vertical direction is shortened.

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 and reproducing information on a recording medium such as a magneto-optical disk or a magnetic disk.

[0002]

2. Description of the Related Art For example, a disk device includes a rotary drive mechanism for holding and rotating a recording medium, an optical pickup device provided behind the rotary drive mechanism for irradiating a recording medium with a light beam, and an optical pickup device for the optical pickup device. There is known one provided with an external magnetic field applying device which is provided above and applies a magnetic field to a recording medium.

Conventionally, this type of disk device has been constructed, for example, as shown in FIGS. 3 and 4, which will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a U-shaped chassis each having side plates 1a and 1b facing each other with a predetermined distance and a bottom plate 1c interposed between these side plates 1a and 1b. It is provided in a housing (not shown) for use. Each side plate 1 of this chassis 1
Two front and rear guide slits 2a, 2b, 3a and 3b extending in the vertical direction are provided in a and 1b. Further, on the bottom plate 1c of the chassis 1, there is attached a protrusion 4 which can be fitted into a positioning hole of an external magnetic field applying device described later.

Reference numeral 5 is a U-shaped slide plate having side plates 5a and 5b facing the side plates 1a and 1b, which is provided in the chassis 1 and is a disk cartridge for the inside of the housing (not shown). It is configured to advance and retreat in the front-back direction by inserting / removing 6. Each of the side plates 5a, 5b of the slide plate 5 has two front and rear inclined slits 7a, 7b, 8a, 8b having a slope descending from the front to the rear.
Is provided.

Reference numeral 9 denotes a cartridge holder for holding the disc cartridge 6 so that the disc cartridge 6 can be inserted and removed. The cartridge holder 9 is provided in the slide plate 5 so as to be movable up and down. The upper end plate of the cartridge holder 9 is provided with an opening window 10 extending rearward from the central portion. Further, on each side end surface of the cartridge holder 9, two support pins 11a, 11b, 12 are arranged in parallel in the front-rear direction with a predetermined interval.
a and 12b are projected. These support pins 11a,
The reference numerals 11b, 12a and 12b face the corresponding guide slits 2a, 2b, 3a and 3b and are inserted into the inclined slits 7a, 7b, 8a and 8b.

Reference numeral 13 denotes two left and right arms 1 projecting forward.
A holder for an external magnetic field applying device having 3a, 13b, in which a spindle 14, 1 is provided at the rear end upper edge of the chassis 1.
5 is provided so as to be rotatable, and a protrusion 16 that comes into contact with the upper end surface of the cartridge holder 9 is integrally provided at the center portion in the front-rear direction of the side edge.

Reference numeral 17 denotes an external magnetic field applying device for applying a specific magnetic field to the disk 6a of the disk cartridge 6. The front and rear central portions of the left and right side end walls are the support shafts 18 and 19 at the tips of the arms 13a and 13b. A coil support frame 20 that is pivotally supported via the coil support frame 20 and faces the opening window 10 in the disk loading state, a coil 21 wound in the coil support frame 20 for generating a magnetic field, and fixed above the coil 21. The back yoke 22 and the like extending in the front-rear direction are provided above the cartridge holder 9. At the rear end of the coil support frame 20 of the external magnetic field applying device 17, there is integrally provided a positioning hole 23 that faces the inside of the protrusion 4 in the disk loading state.

Reference numeral 24 is a rotary drive mechanism provided on the chassis 1 for holding and rotating the disk 6a of the disk cartridge 6.

In addition, behind the rotary drive mechanism 24,
An optical pickup device (not shown) for irradiating the recording layer of the disk 6a with a light beam is provided so as to be movable back and forth.

The disk loading of the disk device constructed as described above is performed by inserting the disk cartridge 6 into the cartridge holder 9.

That is, when the disc cartridge 6 is inserted into the cartridge holder 9, the slide plate 5
Moves forward due to the elastic force of a spring (not shown), and the forward movement of the slide plate 5 moves the cartridge holder 9 downward (disk loading position). At this time, since a part of the cartridge case of the disc cartridge 6 is opened, an optical pickup device (not shown) faces the recording surface of the disc 6a. In addition, the holder 13 by lowering the cartridge holder 9
The coil support frame 20 is lowered by the rotation of the
The upper magnetic pole 4 faces the positioning hole 23 and the external magnetic field applying device 17 faces the recording surface of the disk 6a.

On the other hand, the disc unloading is performed by pulling the disc cartridge 6 out of the cartridge holder 9.

That is, when the disc cartridge 6 is pulled out of the cartridge holder 9 (the eject button is pushed), the slide plate 5 moves backward against the elastic force of a spring (not shown), The cartridge holder 9 is moved upward (disc unloading position) by retreating the slide plate 5.

[0015]

By the way, in this type of disk device, the back yoke 22 is laminated above the coil 21. Therefore, the vertical dimension of the disk device housing (not shown) is large. Therefore, there has been a problem that it is not possible to comply with the thinning of the device in recent years.

The present invention has been made in view of the above circumstances, and provides a disk device capable of shortening the vertical dimension of the disk device housing and thus responding to the recent thinning of the device. To do.

[0017]

DISCLOSURE OF THE INVENTION A disk device according to the present invention includes a housing having a cartridge holder therein which is moved up and down by inserting and removing a disk cartridge, and a main body which is provided in the housing and is rotated by lifting and lowering the cartridge holder. And an external magnetic field applying device having a yoke that separates and couples to the main body, and a driving means that applies a separating and coupling moving force to the main body to the yoke of the external magnetic field applying device is provided in the housing. .

[0018]

In the present invention, when the cartridge holder is lowered during disk loading, the yoke can be moved and moved by the driving means in the direction perpendicular to the holder raising / lowering operation so as to connect the main body and the yoke.

On the other hand, when the cartridge holder is raised during unloading of the disc, the yoke can be moved and separated by the driving means in the direction perpendicular to the holder elevating and lowering operation.

[0020]

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 main part of a disk device according to the present invention, and FIGS. 2A and 2B are sectional views showing a disk loading state and a disk unloading state of the disk device according to the present invention. In the figure, the same or equivalent members as those in FIGS. 3 and 4 are designated by the same reference numerals.

In FIG. 1, the reference numeral 51 designates a U-shaped slide plate having side plates 51a and 51b facing the side plates 1a and 1b, respectively, which is provided in the chassis 1 and has the housing. When the disc cartridge 6 is inserted into and removed from (not shown), the disc cartridge 6 is moved forward and backward (the cartridge inserting and removing direction). Each side plate 51a, 51b of the slide plate 51 is provided with two front and rear inclined slits 52a, 52b, 53a, 53b having a slope descending from the front to the rear like the slide plate 5. Both side plates 51a of this slide plate 51,
Among the 51b, the rear end upper edge of the left side plate 51a,
Two front and rear pressing pieces 54, 55 that project toward the right side plate 51b and are arranged in parallel in the front-rear direction at intervals are integrally provided.

Reference numeral 57 is a holder for an external magnetic field applying device.
It consists of two left and right support arms 57a, 57b projecting forward and a connecting piece 57c connected to the rear end portions of these both support arms 57a, 57b and extending in the left-right direction, and the rear end upper end of the chassis 1 Shafts 58 and 5 on the edge
It is rotatably provided via 9. This holder 5
The spring 7 is urged to rotate toward the disk cartridge 6 in the cartridge holder 9 by a spring 56.

Reference numeral 60 is an external magnetic field applying device for applying a magnetic field of a specific polarity to the disk 6a of the disk cartridge 6, and the front and rear central portions of the left and right side end walls are fulcrum shafts at the tips of the support arms 57a and 57b. A main body 63 that is rotatably pivoted through 61 and 62 and faces the opening window 10; and a pin 64a that is capped above the main body 63 in a disk loading state and that is moved forward and backward by a lever described later. It is composed of a back yoke 64 and is provided above the cartridge holder 9.

The main body 63 of the external magnetic field applying device 60 is
A bottomed rectangular box-shaped coil support 67 having flanges 65 and 66 having flange end surfaces that can be seated on the front and rear upper edges of the opening window 10, and the front and rear direction end portions housed in the coil support 67 are elongated. It is configured by a core 68 having a rectangular shape in plan view as an end portion in the direction, and a coil 69 wound around the core 68 to generate a magnetic field.

Reference numeral 71 denotes a lever as a driving means, which is rotatably provided on the upper end surface of the cartridge holder 9 via a support shaft 72, and is separated and connected in the front-rear direction to the back yoke 64 with respect to the main body 63. It is configured to give movement power. The lever 71 includes an upper piece 71a facing the upper end surface of the back yoke 64, and a lower piece 71 that is provided on the upper piece 71a via a connecting portion 71c and contacts the upper end surface of the cartridge holder 9.
It is formed by an elastically deformable stepped lever composed of a and a.

The upper piece 71a of the lever 71 extends in the lever longitudinal direction and the pin 64 of the back yoke 64.
A slit 73 through which a is inserted is formed, and the lower piece 7
1b is provided with a pin 74 protruding upward and facing between the pressing pieces 55 and 56.

Reference numeral 75 denotes two guides each extending in the front-rear direction and facing each other in the left-right direction at intervals with respect to each other and having an L-shape in cross section. It is configured to guide the back yoke 64 in the front-rear direction when rotating.

In the disk device constructed as described above, when the cartridge holder 9 is lowered as shown in FIG. 2 (A) at the time of loading the disk, the back yoke 6 is moved rearward by the lever 71 in a direction perpendicular to the holder ascending / descending operation.
The main body 63 and the back yoke 70 can be joined by carrying out the transfer operation of the unit 4.

In this case, the lowering of the cartridge holder 9 is performed by inserting the disc cartridge 6 into the cartridge holder 9 as in the prior art.

That is, when the disc cartridge 6 is inserted into the cartridge holder 9, the slide plate 5
1 moves forward by the elastic force of a spring (not shown),
Due to the forward movement of the slide plate 51, the cartridge holder 9 moves downward (disk loading position).
At this time, since a part of the cartridge case of the disc cartridge 6 is opened, an optical pickup device (not shown) faces the recording surface of the disc 6a. Also,
The coil support 67 is lowered by the rotation of the holder 57 caused by the lowering of the cartridge holder 9 and faces the recording surface of the disk 6a of the external magnetic field applying device 60.

On the other hand, when the disc is unloaded, as shown in FIG.
When the cartridge holder 9 is raised as shown in (B), the back yoke 64 can be moved forward by the lever 69 in a direction perpendicular to the holder elevating operation to separate the main body 63 and the back yoke 64.

In this case, the cartridge holder 9 is raised by pulling the disk cartridge 6 out of the cartridge holder 9.

That is, when the disk cartridge 6 is pulled out of the cartridge holder 9 (the eject button is pressed), the slide plate 51 moves backward against the elastic force of a spring (not shown), The cartridge holder 9 is moved upward (disc unloading position) by retreating the slide plate 51.

Further, in this embodiment, the back yoke 64 can be moved in the direction perpendicular to the holder elevating operation by raising and lowering the cartridge holder 9, which means that the thickness of the back yoke 64 is the same as the loading movement stroke of the cartridge holder 9. Since the size can be set, the amount of magnetic flux leakage of the external magnetic field applying device 60 can be reduced.

Further, in the present invention, the back yoke 6
The fact that the thickness of No. 4 can be set to the same dimension as the loading movement stroke of the cartridge holder 9 can be formed by a back yoke having an aluminum heat sink made of a non-magnetic material as the back yoke. Is also sufficient.

In the present embodiment, the lever 71 is used as the driving means for the back yoke 64, but the present invention is not limited to this. For example, driving of a spring, a plunger, a motor, or the like. Even with the means, the same effect as that of the embodiment can be obtained.

In the present embodiment, the case where the disc unloading position of the back yoke 64 is in front of the main body 63 is shown, but the present invention may be in the rear of the main body 63 or in the left-right direction.

Besides, in this embodiment, the coil 63 is provided as the main body 63 of the external magnetic field applying device 60, but the present invention is provided with a permanent magnet or a permanent magnet and a coil. But it doesn't matter.

[0040]

As described above, according to the present invention, there is provided a housing having therein a cartridge holder which is moved up and down by inserting and removing a disk cartridge, a main body which is provided in the housing and which is rotated by lifting and lowering the cartridge holder, and An external magnetic field applying device having a yoke for separating / coupling from the main body is provided, and drive means for applying a separating / coupling moving force to the main body to the yoke of the external magnetic field applying device is provided in the housing, so that the disk loading When the cartridge holder is lowered at some time, the yoke can be transferred and operated by the driving means in a direction perpendicular to the holder raising / lowering operation to connect the main body and the yoke, while when the cartridge holder is raised during unloading the disc, the driving means moves the holder up and down. Operate the yoke in the direction perpendicular to the movement It can be separated body and yoke.

Therefore, since the vertical dimension of the housing can be reduced, it is possible to comply with the recent thinning of the device.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view showing a conventional disk device.

FIG. 4 is a sectional view showing a conventional disk device.

[Explanation of symbols]

 6 ... Disk cartridge 9 ... Cartridge holder 60 ... External magnetic field applying device 63 ... Main body 64 ... Back yoke 71 ... Lever 51 ... Slide plate

Claims (3)

[Claims] 1. A casing having therein a cartridge holder that moves up and down when a disk cartridge is inserted and removed, a main body that is provided in the casing and that rotates when the cartridge holder moves up and down, and a yoke that separates from and is coupled to this main body. And an external magnetic field applying device having
A disk device comprising drive means for applying a separating / combining moving force to the main body to the yoke of the external magnetic field applying device in the housing. 2. A housing having therein a slider that moves forward and backward by inserting and removing a disk cartridge and a cartridge holder that moves up and down as the slider moves forward and backward, a main body that is provided in the housing and that rotates when the cartridge holder moves up and down, and An external magnetic field applying device having a yoke that is separated and coupled to the main body,
A drive unit for applying a separating / coupling moving force to the yoke of the external magnetic field applying device is provided in the housing, and the drive unit is configured by a lever that is rotated by advancing and retracting the slider. . 3. The disk device according to claim 2, wherein a guide for guiding the yoke is provided on the cartridge holder, and the lever is formed by an elastically deformable lever.