JPH0520857A - Optical disc unit - Google Patents

Abstract

PURPOSE:To prolong service life of an optical disc unit by applying first and second covers on the cassette insertion port thereby blocking intrusion of dust through gaps by means of barriers and achieving dustproof function balanced with heat dissipating function. CONSTITUTION:Upon insertion of a cassette 10 in the arrow direction, a first cover 2 rotates about the center of rotation to house the cassette 10 in a case 12. Consequently, a switch functions to rotate a motor and the cassette 10 moves, through gears, horizontally in the unit along a guide hole 11a of a guide board 11a together with the case 12 and then the cassette 10 moves vertically downward. A stud 22 then lowers to rotate a lever 23 in the direction of an arrow (c) so as to position the cassette 10 above a reproducing means 13 and to close the insertion port 1a by means of a second cover 3 thus ending cassette loading operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism of a dustproof lid of a disk device and a structure of the dustproof device in consideration of heat radiation in the device.

[0002]

2. Description of the Related Art For example, an optical disk recording / reproducing apparatus is an apparatus for recording and reproducing high density information on an optical disk which is an optical recording medium, and has a feature that a recording medium can be easily replaced.

On the other hand, however, because it handles light, if dust in the air accumulates on the objective lens of the optical pickup due to long-term use, the laser beam output from the objective lens or the laser beam reflected and condensed by the objective lens. The light may be obstructed by dust, resulting in poor performance such as poor access, which shortens the life of the device.

In particular, in order to increase the density of a built-in type disk device, electronic elements such as a laser diode of an optical pickup and electric parts such as a disk rotating motor are arranged in a narrow space. ,
Since these electronic elements and electric parts generate heat during disk reading or writing, they are highly densified, so the temperature inside the device may become high, which shortens the life of the device.

Therefore, in the conventional optical disk device, as a dustproof means, for example, a means for defining a circulation path of air is provided so as to prevent dust entering with air from approaching the optical pickup, or an air filter is provided at the air intake port. I was deploying.

Related to this kind of means, for example, JP-A-62-52785 and JP-A-62-29.
8074, JP 63-293783, and JP 64-52279.

As the heat radiation means, there is a means for air cooling by naturally or forcedly circulating air, and a means related to this kind is disclosed in, for example, JP-A-64-43888.
Etc.

[0008]

In the above prior art, the dust-proof effect and the heat-dissipating effect have the opposite properties such that if one is improved, the other is deteriorated, but only one effect is described. Since no consideration was given to the balance of the performances, there was a problem that the life of the device was shortened in any case.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a disk device which has a dustproof and radiator function in consideration of the balance between the dustproof function and the heat radiation function, and which prolongs the life of the apparatus. There is.

[0010]

[Problems to be Solved by the Invention] The above-mentioned problem is that the first lid for opening the disc insertion opening in the disc device which tilts backward by the insertion operation into the cassette disc device containing the disc and the cassette are mounted on the disc reproducing means. A second lid that rotates so as to close the disc insertion opening by the above-mentioned operation, and a partition is provided further behind the disc reproducing means behind the first lid and the second lid. is there.

[0011]

In both the state where the cassette containing the disc is mounted on the reproducing means of the disc device and the state where the cassette is inserted, the first lid and the second lid substantially close the disc insertion opening. Therefore, prevent dust that floats in the air from entering the device.

The dust floating in the air entering through the minute gaps between the first and second lids is provided by the partition wall at the rear of the reproducing means, and the air at the front of the partition is outside the device by the holes on the other surfaces. The amount of dust reaching the reproducing means is reduced because the air flows into the device, and heat is dissipated in the device by the air flow.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing a cross section of the optical disk device according to an embodiment of the present invention in a state before a cassette having a built-in disk (a cassette having a built-in disk is abbreviated as a cassette hereinafter) is inserted.

FIG. 2 is a schematic diagram showing a cross section of the reproducing means of the optical disk apparatus of the embodiment of the present invention in which the cassette is mounted and in the reproducing state.

In each drawing, 1 is a front panel, 1
a is a cassette insertion slot, 2 is a first lid, 3 is a second lid, 4
Is a cover, 5 is a chassis, 6 is a signal connector, 7 is a power cord, 10 is a cassette, 11 is a guide plate, 12 is a cassette storage case, 13 is a reproducing unit, 14 is a spring, 15 is rubber, and 16 is A partition wall, 17 is a substrate, 18 is a disk rotation motor, 19 is an optical head, and 20 is a turntable.

As shown in FIG. 1, the optical disk device having the above-mentioned structure is shown in FIG. 1 when the cassette 10 is not inserted and the cassette insertion opening 1a is closed by the first lid 2 and the cassette 10 is mounted on the reproducing means 13. 2, cassette insertion slot 1a
With the second lid 3. The operation of the first and second lids 2 and 3 will be separately described later.

Next, as shown in FIG. 2, when the turntable 20 rotates during disk reproduction, the reproducing means 13 in the space surrounded by the front panel 1, the second lid 3, the cover 4, the chassis 5 and the partition 16 is pneumatically operated. Since air flows out through the respective gaps, the dust floating in the air is prevented from entering and the dust accumulated in the optical lens of the optical head 19 is reduced.

Dust that enters with the air from the minute gap of the second lid is covered by the cover 4 and the partition wall as shown by the arrow (a) in the figure.
Distributed by 16 As a result, heat is dissipated inside the optical disk device, and at the same time, dust is less accumulated on the optical head 19 in front of the partition. Since the heat radiation and the dustproof have opposite properties, the cover 4 may be provided with a hole of an appropriate size in the chassis 5, or may be sealed together with the partition wall 16 without being opened.

Next, a specific example of the operation of the first lid 2 and the second lid 3 whose outline has been described above will be described below with reference to FIGS.

FIG. 3 is an enlarged schematic diagram showing details of the A portion in FIG. 1, and FIG. 4 is an enlarged schematic diagram showing details of the B portion in FIG.

In each drawing, the same parts as those in the previous drawings are designated by the same reference numerals.

Reference numeral 22 is a stud that is suitably provided in the cassette storage case 12 and 23 is a lever that is rotatably engaged with the guide plate 11 about the 0 axis, and 24 is a second lid 3.
25 indicates a pin provided on the first lid 2, 25 indicates a first spring for urging the first lid 2 in a direction to close the cassette insertion opening 1a of the front panel 1, and 26 indicates a second lid 3 for the cassette insertion opening. 2a shows a second spring biased in a direction to close 1a.

The first lid 2 and the second lid 3 having the above structure
As shown in FIG. 3, when the cassette 10 is inserted from the direction of the arrow (b), it can be seen that the first lid stores the cassette 10 in the storage case 12 around the rotation center 2a. .

When the cassette is housed in the case, the motor is rotated by the action of the switch and the combination of gears (not shown) causes the cassette 10 to be shown together with the case 12 in the guide holes 11a of the guide plate 11 shown in FIGS. Along the inside of the device horizontally and then vertically downwards.

When the case 12 is moved vertically downward, the stud 22 is also lowered and the lever 23 is rotated in the direction of the arrow (c) so that the cassette 10 is not positioned on the reproducing means 13 as shown in FIG. The above-mentioned disc insertion opening 1a is attached to the second lid 3
This completes the insertion and mounting operation of the blocking cassette 10. The discharging operation of the cassette 10 is performed in the reverse order.

Next, an application example of one embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view of the optical disc device of the present invention as seen from above of a stand-alone type optical disc device. The same reference numerals as those used in the previous drawings are attached with the same reference numerals, and the other 27 is an enclosure, 27a is a ventilation hole formed in the enclosure, 28 is a blower 29 is a power supply unit, 30 is an interface board 31 is a signal processing board.

In the figure, the flow path when the air is blown in by the blower 28 is shown by the broken line (d), and when it is blown out, it is shown by the solid line (b). It turns out that the flow is very rare.

[0029]

According to the present invention, the inside of the apparatus is substantially closed by the first lid or the second lid except when the cassette is inserted into and ejected from the optical disk apparatus, and the first and second lids or other small elements are used. The dust that enters with the air through the gaps or holes is substantially diffused in front of the partition wall, that is, before the reproducing means portion by the partition wall at the rear portion of the reproducing means, and the dust is less likely to be deposited on the reproducing means, and the disk on the reproducing means is When the disc rotates, the inside of the device is almost sealed by the first and second lids, the surrounding wall and the partition wall, so the air pressure rises and the invasion of air can be prevented. Due to the rotation and the minute gap of the lid, air can be circulated so that heat can be released and the performance guarantee limit value of each electronic component is not exceeded. As a result, the life of the device is greatly extended.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an optical disk device of the present invention as seen from the side.

FIG. 2 is a schematic cross-sectional view of an optical disk device of the present invention as seen from the side.

FIG. 3 is an enlarged view of part A in FIG.

FIG. 4 is an enlarged view of part B in FIG.

FIG. 5 is a schematic view showing a cross section of a plane showing an application example of the present invention.

[Explanation of symbols] 1 ... front panel, 2 ... the first lid, 3 ... the second lid, 4 ... cover, 5 ... chassis, 10 ... cassette, 11 ... guide plate, 12 ... cassette storage case, 13 ... Playback unit, 16 ... partition, 18 ... disk rotation motor, 19 ... Optical head, 20 ... turntable, 22 ... studs, 23 ... lever, 24 ... pin, 25 ... the first spring, 26 ... second spring

Claims (3)

[Claims] 1. A built-in type disc recording / reproducing apparatus, which is a lid device for opening and closing an insertion opening of a disc or a cassette containing the disc, is biased by a spring in a direction of closing the cassette insertion opening. Along with the operation of locating the first lid that is rotatable behind the cassette insertion opening and the disc or the cassette containing the disc on the reproducing means of the apparatus, the first lid is connected backward. When the disc or the cassette is ejected, the disc or the cassette is detached from the reproducing means and moves so that the disc or the cassette is ejected. When the second lid is rotated upward to open the cassette insertion opening in the previous term and the disc or cassette is ejected from the apparatus in the previous term, In the optical disc device in which one lid is used to close the disc or cassette insertion slot, the air is placed behind the set of the disc rotating motor, the optical or magneto-optical head, and the optical or magneto-optical head driving device on the reproducing means. An optical disk device characterized in that a partition wall that substantially prevents circulation is provided facing the cassette insertion slot in the previous period. 2. An optical disk device comprising the built-in type optical disk device of claim 1 incorporated into a stand-alone type (fixed type) disk device. 3. The optical disk device according to claim 2, wherein the stand-alone type disk device is provided with slits on the left and right side surfaces of the outer frame and a blower on the inner rear surface.