JPH08287671A - Disk reproducing device - Google Patents

Abstract

PURPOSE: To prevent an objective lens from becoming dirty due to sucking of the air by providing a blocking member in a disk inserting hole of a disk reproducing device incorporated in a computer equipped with a cooling fan and hence increasing air flow resistance. CONSTITUTION: The disk reproducing device 20 is incorporated in the computer main body 10. The disk inserting hole 22 of this device 20 is provided with a felt 31, and when the cooling fan 14 is rotated, the inflow resistance of the outside air is increased to make the outside air flow inside via an air passage 29 having a small inflow resistance, and hence the outside air does not flow into the device 20. Thus, dust is prevented from sticking to the objective lens of an optical pickup 25 of the device 20 due to the outside air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus in which outside air does not flow along with dust.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view of a personal computer incorporating a conventional disc reproducing apparatus which emits a laser beam to a disc 60 and reproduces information by the reflected light. In the figure, a disc reproducing device 80 is incorporated in a front panel 71 of a computer main body 70, and a disc on which digital information is recorded from a slit-shaped disc insertion opening 82 formed in a front panel 81 of the disc reproducing device 80. Insert 60.

In FIG. 5, which is a sectional view of an essential part showing the internal structure of a conventional disk reproducing apparatus 80 and a computer main body 70 incorporating this disk reproducing apparatus 80, a disk 60 is placed inside the disk reproducing apparatus 80. 80, and a disk reproducing device 8
A disk transfer mechanism 83 for ejecting to the outside of 0, a spindle motor, a turntable, etc. arranged below the disk 60 when the disk 60 is transferred to the reproduction position in the disk reproducing device 80 by the disk transfer mechanism 83. A disk rotation driving mechanism 84 and a similar optical pickup 85, which is arranged below the disk 60 located at the reproduction position, emits laser light to the disk 60 and receives the reflected light.

The computer main body 70 includes an LSI
In order to dissipate heat generated from a large number of circuit elements such as
A cooling fan 74 is provided on a rear panel 73 of the computer main body 70 in order to introduce external air from the computer and exhaust the air inside the computer main body 70 to the outside.

[0005]

The objective lens (not shown) for focusing the laser light on the disc to a diameter of about 1 μm is apt to be dusted in the air, and if the objective lens becomes dirty, normal reproduction cannot be performed. Will be. Since the top cover and the rear panel of the disc reproducing device 80 are usually formed with openings 93 for heat dissipation and through which cables are passed, the internal space thereof is not completely sealed, so that the cooling fan 74 sucks the outside air. At this time, the outside air is sucked not only from the suction port 72 but also from the disc insertion port 82. Dust contained in the outside air sucked in through the disc insertion port 82 adheres to the objective lens and prevents normal reproduction.

In Japanese Patent Laid-Open No. 5-198156, an air passage is provided in a disc reproducing apparatus, a circuit board is arranged in the air passage, an air intake port is provided above a disc insertion port in a front panel, and a rear panel thereof. There is disclosed a structure in which an air exhaust port is provided in the disk and the disk reproducing device is incorporated into a subsystem having a cooling fan. Further, a rotatable flap is provided at the disc insertion opening so that outside air is not sucked into the disc reproducing device.

However, since the air passage is formed over substantially the entire length of the disc reproducing apparatus, and the circuit board is arranged in this air passage, the inflow resistance of the air passage is not small, and the inside of the disc reproducing apparatus is large. The space is not closed. Therefore, when the cooling fan rotates, some outside air is sucked into the disc reproducing device through the minute gap between the flap and the disc insertion port, and the objective lens is contaminated.

[0008]

A disk insertion opening formed in a front panel, a reproducing means for reproducing a disk, and an air passage formed over the front panel and an outer surface adjacent to the front panel.

[0009]

Since the outside air sucked by the cooling fan passes through the air passage having a small inflow resistance, the outside air is not sucked into the disc reproducing device from the disc insertion opening, and the objective lens may be contaminated by dust or the like. To be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the device of the present invention will be described below. FIG. 1 is a perspective view of a personal computer in which the device of the present invention is incorporated, in which the length of the disc insertion port 12 is above the disc insertion port 22 formed in the front panel 21 of the disc reproducing device 20 incorporated in the computer main body 10. A suction port 26 having a length substantially equal to the height is formed. A discharge port 28 communicating with the suction port 26 is formed in the top cover 27 of the disc reproducing device 20.

FIG. 2 is a cross-sectional view of the essential parts showing the internal structure of the disk reproducing device 20 incorporated in the computer body 10. The suction port 26 and the discharge port 28 are isolated from the internal space of the disc reproducing device 20.
Is communicated by an air passage 29 that penetrates the inside of the computer and connects the internal space and the external space of the computer main body 10 with the shortest distance. Further, in order to close the disc insertion opening 22 when the disc 60 is not attached or detached, a felt 31 having a notch formed at a distance substantially equal to the diameter of the disc 60 is formed in the disc insertion opening 22.
Are located in

It should be noted that the top cover 27 and the rear panel 32 of the disc reproducing device 20 are provided with a large number of cables for heat dissipation and for passing a cable (not shown) for connecting the disc reproducing device 20 and the computer main body 10. The opening 33 is formed.

When the cooling fan 14 arranged on the rear panel 13 of the computer main body 10 rotates to cool the circuit elements (not shown) in the computer main body 10, outside air is formed on the front panel 11 of the computer main body 10. Although being sucked from the suction port 12, the outside air is further sucked into the computer main body 10 through the air passage 29 provided in the disc reproducing device 20.

Here, since the disc insertion port 22 is provided with the felt 31, the inflow resistance to the air sucked into the computer main body 10 through the disc insertion port 22 and the opening 33 is outside the computer main body 10. It is larger than the inflow resistance of the air passage 29 that connects the space and the internal space of the computer main body 10 with the shortest distance. Therefore, most of the outside air is introduced from the air passage 29, so that the outside air does not enter the disc reproducing device 20, so that dust is not attached to the optical pickup 25.

Although the above embodiment has been described with reference to an embodiment in which the disc reproducing apparatus is incorporated in the computer main body 10, the disc reproducing apparatus 20 has a power source 41, a cooling fan 44, etc., as shown in FIG. , SCSI
It can also be incorporated in the subsystem 40 connected to the computer main body by a cable 42 or the like.

Further, in the above-mentioned embodiment, the air passage 2
Although the discharge port 26 of 9 is formed in the top cover 27 of the disc reproducing apparatus 20, the air passage 29 may be formed as short as possible so that the inflow resistance is sufficiently small. It may be provided on the outer surface adjacent to the front panel 21 such as the bottom cover or the side cover of the device 20.

Further, in the above-mentioned embodiment, the felt 31 is provided as the closing member for increasing the inflow resistance of the air sucked from the disc insertion opening 22, but the flap for opening and closing the disc insertion opening 22 is provided. The flap may be provided and the disc insertion opening may be closed by this flap.

Since the inflow resistance of the air passage 29 is extremely small, the inflow resistance of the air passage 29 from the disc insertion opening 22 into the computer main body 10 is small because the opening 33 formed in the disc reproducing device is small. If the inflow resistance of the inhaled air is sufficiently large, it is not necessary to provide the felt 31 or the flap.

Further, in the above-described embodiment, the air passage 29 is configured to be isolated from the internal space of the disk reproducing device 20, but the air sucked from the suction port 26 does not enter the internal space of the disk reproducing device 20. It only needs to be structured, and it is not necessary to maintain strict confidentiality.

The present invention can also be applied to a magneto-optical disk drive or the like in which a disk is housed in a cartridge and which can be recorded as well as reproduced.

[0021]

According to the present invention, since the air passage having a small inflow resistance is provided in the disc reproducing apparatus, the objective lens is prevented from being contaminated due to the intake of the outside air from the disc insertion port, and the objective lens is protected for a long period of time. This enables stable and stable disc playback.

[Brief description of drawings]

FIG. 1 is a perspective view showing a personal computer incorporating a device of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing the internal structures of the device of the present invention and the computer main body.

FIG. 3 is a perspective view showing a subsystem incorporating the device of the present invention.

FIG. 4 is a perspective view showing a personal computer incorporating a conventional device.

FIG. 5 is a cross-sectional view of essential parts showing the internal structures of a conventional apparatus and a computer main body.

[Explanation of symbols]

 10 Computer Main Body 14 Cooling Fan 20 Disc Playback Device 21 Front Panel 22 Disc Insertion Port 29 Air Passage 33 Felt 40 Subsystem 60 Disc

Claims (5)

[Claims] 1. A disc insertion opening formed in a front panel, a reproducing means for reproducing the disc, and an air passage formed over the front panel and an outer surface adjacent to the front panel. Characteristic disc playback device. 2. The disc reproducing apparatus according to claim 1, wherein an inner space of the air passage is provided so as to be separated from an inner space of the disc reproducing apparatus in which the disc reproducing means is arranged. 3. The disc reproducing apparatus according to claim 1, wherein a closing member is provided at the disc insertion opening in order to increase an inflow resistance of air flowing in from the disc insertion opening. 4. The disk reproducing apparatus according to claim 1, wherein the disk reproducing apparatus is incorporated in a computer having a cooling fan. 5. The disc reproducing apparatus according to claim 1, further comprising a power supply and a cooling fan, which is incorporated in a subsystem connected to a computer.