JPH07282574A - Optical disk device - Google Patents

Abstract

PURPOSE:To improve the durability of the constituting parts of an optical disk device and to improve the reliability of the optical disk device by adequately maintaining humidity by making effective use of the internal space of the optical disk device, thereby preventing generation of dust and static electricity by the low humidity and generation of rust and corrosion by the high moisture. CONSTITUTION:An optical head 1, a disk 2, a cartridge 3 and a spindle motor 4 are enclosed with a plate 5 and a cover 6 and are made into a hermetic structure for protecting these members against external dust. A container 9 is hung from the upper part of the plate 5 and is disposed in this structure by effectively utilizing the inside space 7. A desiccating agent 8 is included in this container 9. A filter 10 is mounted at a hole 11 formed in the container 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and more particularly to a humidity control mechanism for the internal space of the device.

[0002]

2. Description of the Related Art Conventionally, in order to increase the storage capacity of an optical disk device, there is a limit to one disk for recording / reproducing information. Therefore, the disk is replaced to increase the apparent storage capacity. I am letting you. Details of the above configuration will be described with reference to the drawings. FIG. 3 shows an example of a conventional optical disk device. In FIG. 3, the disk 2 is contained in a cartridge 3. The disk 2 is rotated by a spindle motor 4. The optical head 1 is
Information is optically written and read on the disk 2. When replacing the cartridge 3 and the disc 2, the cover 6 is opened and taken out from the optical disc device,
Exchange. Normally, the cover 6 is closed, and the spindle motor 4, the optical head 1, the cartridge 3 and the disk 2 are enclosed by the cover 6 and the plate 5 to have a hermetically sealed structure for protecting the optical head 1 from dust. It has been sometimes said that the enclosed internal space 7 is likely to be a specific environment in which it is hermetically sealed for a long time because the cover 6 is normally closed.

It is to be noted that it is disclosed in Japanese Patent Laid-Open No. Sho 59-59 that a space is purposely provided under a plate (base, disk enclosure) of a magnetic disk device and a dehumidifying mechanism is installed therein.
-222274 and Japanese Patent Laid-Open No. 3-151020.

[0004]

In the above-mentioned conventional optical disk device, since the internal space is a sealed environment, if the humidity of the internal space changes, the optical disk device is exposed to an abnormal humidity environment for a long time. At this time, if the internal space has low humidity, dust and static electricity are generated in the sliding part of the optical disk device, and if the internal space has high humidity, the internal parts of the optical disk device are adsorbed, and rust and corrosion occur. .

Therefore, the present invention improves the problems of the conventional optical disk device and utilizes the internal space of the optical disk device to maintain the humidity properly, thereby generating dust and static electricity due to low humidity and high humidity. It is intended to prevent the occurrence of rust and corrosion due to the above, thereby improving the durability of the component parts of the optical disk device and also improving the reliability of the optical disk device.

[0006]

An optical disk apparatus according to the present invention includes a disk for storing information, a cartridge containing the disk, a spindle motor for rotating the disk when the cartridge is mounted, and the disk. In an optical disk device having an optical head for optically writing / reading information to / from, a spindle motor, the optical head, a cover that encloses the disc and the cartridge, and a plate, the encapsulation of the cover and the plate A configuration is adopted in which a container containing a desiccant containing water that can adjust the humidity of the internal space to a desired humidity is suspended from the plate in the internal space.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional front view of an optical disk device showing an embodiment of the present invention. In FIG. 1, the disc 2 is contained in a cartridge 3. The disk 2 is rotated by a spindle motor 4. Optical head 1
Writes / reads information optically on the disk 2. When replacing the cartridge 3 and the disk 2, the cover 6 is opened, taken out from the optical disk device, and replaced. Normally, the cover 6 is closed,
The spindle motor 4, the optical head 1, the cartridge 3, and the disk 2 are enclosed by a cover 6 and a plate 5,
It has a sealed structure that protects the optical head 1 from external dust. On the upper part of the plate 5, a container 9 containing a desiccant 8 is hung and provided. The desiccant 8 has an internal space 7
Moisture is preliminarily included so that the desired humidity is obtained.

As an example, the desiccant 8 is JIS-Z-
Silica gel type A specified in 0701, (water content in silica gel / silica gel quantity) × 10
If 0 = water absorption (%), the theoretical relative relationship between water absorption and environmental humidity is shown in Fig. 2.
Shown in.

The humidity of the internal space 7 is 20% R.V. H. ~ 25
% R. H. In order to achieve this, the water absorption rate is set to 12.12% to 14.82%.

The humidity of the internal space 7 is 20% R. H. If it is lower than this, the water content contained in the desiccant 8 will be
The filter 10 attached to the hole 11 provided in the
The moisture in the internal space 7 can be increased by evaporating and diffusing through. Further, the humidity of the internal space 7 is 25% R. H. When it is higher than the above, the desiccant 8 contained in the container 9 can absorb the moisture contained in the internal space 7 through the filter 10 to lower the humidity of the internal space 7. In this way, the humidity of the internal space 7 is set to 20% R. H. 25% R.
H. It can have the function of adjusting the humidity between.
If it is assumed that the desiccant 8 does not contain water, the internal space 7 will be in a low humidity state, dust will be generated at sliding parts on the components of the optical disc device, and damage due to static electricity will occur. Will significantly impair the sex. Further, assuming that the desiccant 8 contains a large amount of water, the internal space 7 is in a high humidity state, adsorption occurs in the component parts of the optical disk device, rust and corrosion occur, and the reliability of the optical disk device is remarkably increased. It will damage. Therefore, it is important to allow the desiccant 8 to contain a desired water content so as to maintain a good humidity environment state in which the internal space is neither low humidity nor high humidity, and by using the present invention,
You will be able to achieve this goal.

[0011]

As described above, by using the drying means according to the present invention in the optical disk device, the internal space can be maintained without major modification to the conventional optical disk device in which various equipment parts are enclosed by the cover and the plate. Can be used to prevent generation of dust and static electricity due to low humidity, prevent rust and corrosion due to high humidity, and improve the durability of the components of the optical disc device.
The reliability of the optical disk device can be improved.

[Brief description of drawings]

FIG. 1 is a sectional front view of an optical disc device according to an embodiment of the present invention.

FIG. 2 is a relative relationship diagram of water absorption of silica gel A type and environmental humidity.

FIG. 3 is a sectional front view of a conventional optical disk device.

[Explanation of symbols]

 1 Optical Head 2 Disk 3 Cartridge 4 Spindle Motor 5 Plate 6 Cover 7 Internal Space 8 Desiccant 9 Container 10 Filter 11 Hole

Claims (2)

[Claims] 1. A disk for storing information, a cartridge containing the disk, a spindle motor for rotating the disk when the cartridge is mounted, and an optical writing / reading operation for the disk. In an optical disk device having an optical head for performing the above, a spindle motor, the optical head, a cover that encloses the disk and the cartridge, and a plate, in the internal space enclosed by the cover and the plate, An optical disk device, characterized in that a container containing a desiccant containing enough water to adjust the humidity to a desired humidity is hung from the plate. 2. The optical disk device according to claim 1, wherein a filter is attached to a hole provided in the container.