JPH01258289A - Optical disk device - Google Patents

Abstract

PURPOSE:To reduce dust, etc., in the air of an optical disk device and to prevent read and write errors by providing an air filter in an opening part near the rotating center of the optical disk and providing an air discharging port in the outer circumference part of the disk. CONSTITUTION:With accompanying the rotation of an optical disk 2, the air in a device casing 3 generates flowing from the rotation center to an outer circumference direction along the surface of the disk 2. Thus, air pressure in the device goes to be negative pressure near the rotation center of the disk 2 to external pressure and goes to be positive pressure near the outer circumference part. Accordingly, in the casing 3, the external air flows through an air filter 11 into the casing 3 by pressure difference, which is generated between the rotation center and outer circumference part of the disk 2, and while a motor 6 part is cooled, the air blows in the outer circumference direction of the disk 2. Then, the air is discharged from an air discharging port 12 in the outer circumference part out of the casing 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc exchangeable optical disc device, and more particularly to an improvement in the air flow path structure within the device casing with a substantially hermetic structure.

[Conventional technology]

Conventionally, in this type of optical disk device, the Vt device casing (device exterior) has generally been of a substantially sealed structure except for a disk loading port having a cassette for loading an optical disk cartridge (hereinafter referred to as an optical disk). Furthermore, in such a sealed structure, since a temperature rise within the device casing cannot be avoided, a structure in which a fan for introducing and exhausting outside air is provided in order to suppress this is also known.

[Problem to be solved by the invention]

However, in the latter configuration in which an optical disk device having such a configuration is provided with a fan, outside air (outside air) constantly flows into the casing, which causes floating dust to adhere to the lens of the optical head and the optical disk medium. This caused errors during read/write operations, which was a problem in terms of device performance. In addition, even in the former device structure without a fan, the rotation of the optical disk creates a negative pressure area and a positive pressure area within the casing, so external air may flow in through the gap in the casing exterior, or the air inside the device may It is unavoidable that airflow occurs within the casing, and the resulting floating dust adversely affects the read/write characteristics as described in 1iii, which poses a problem in terms of device performance. It is recommended that some measures be taken to eliminate these problems.

[Means to solve the problem]

In order to meet such demands, the optical disc device according to the present invention has an opening for introducing outside air [1] formed in a portion close to the rotation center of the optical disc in the exterior portion of the device casing having a substantially sealed structure. An air filter that can be fitted into one part is provided, and an air exhaust port with a slight gap is provided in a part close to the outer periphery of the optical disc.

[Effect]

According to the present invention, negative pressure generated near the center of rotation as the optical disk rotates causes external air to flow into the casing through an air filter provided in the outer casing of the casing adjacent to the negative pressure. In addition, due to the positive pressure generated near the outer periphery of the optical disk, internal air can be discharged to the outside from an air outlet formed by a small gap in the outer casing of the casing adjacent to the outer periphery.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

The figure shows one embodiment of an optical disk device according to the present invention, and the optical disk device, which is indicated by the symbol l in the figure as a whole, can write on the optical disk 2 by loading the optical disk 2 in a replaceable manner. The device is for reading (reproducing) information or writing (storing) information, and includes a device casing 3 having a substantially sealed structure except for a disk loading port 3a on the outer periphery. Inside the casing 3, a support stand 5 for movably supporting the optical head 4 is disposed while maintaining a predetermined height position by supports 5a and the like.

Reference numeral 6 denotes a spindle motor which is disposed through the center of the support base 5. The optical disk 2 loaded in the casing 3 is set on the motor shaft 6a, and a clamper 7 that presses and holds the optical disk 2 is set on the motor shaft 6a. It is provided. In addition, 8
A shutter opens and closes the disk loading port 3a.

Further, in the optical disc loading g1 having such a configuration, the optical disc 2 is inserted into the casing 3 through the loading port 3a while opening the shutter 8, and is loaded onto the spindle motor 6 side by a disc guiding mechanism (not shown), and is then moved by the clamper 7. By being able to press and hold, it is possible to apply pressure to the optical
It is well known that the required information can be read and written using the .

Now, according to the present invention, in the casing 3 of the optical disc device I described in F, which has a substantially sealed structure, a part of the exterior part of the casing 3 corresponding to the lower side of the motor 6 near the center of rotation of the optical disc 2 is provided. Opening 1 for introducing outside air
0, an air filter 11 that can be fitted into this opening lO is attached and fixed, and an air outlet 12 having a slight gap is provided at one location on the exterior side of the casing 3 close to the outer circumference of the optical disc 2. Or, it has a feature in that it is provided in multiple locations. Note that according to this embodiment,
-h Although a case is shown in which the air exhaust port 12 described above is formed using a gap formed by the disk loading port 3a and the shutter 8 that closes this, it is needless to say that the present invention is not limited to this.

Further, in the figure, 13 is an air flow passage formed by a notch formed in the support base 5 that supports the motor 6, and 14 is an air filter 11.
This is a guide cylinder that guides the external air flowing through the motor 6 while cooling it by the negative pressure at the center of rotation of the optical disk 2.

According to such a configuration, as the optical disc 2 rotates, the air inside the device casing 3 is removed from the optical disc 2.
A flow is generated along the surface from the center of rotation toward the outer periphery, and as a result, the air pressure within the apparatus relative to the outside air pressure becomes negative and positive near the center of rotation of the optical disc 2, and positive pressure near the outer periphery of the optical disc 2. Therefore, due to the pressure difference generated between the rotation center and the outer circumference of the optical disk 2 within the casing 3, outside air flows into the casing 3 through the air filter ll, and flows toward the outer circumference of the optical disk 2 while cooling the motor 6. , a flow path is formed for the air to be sequentially exhausted out of the casing 3 from the air IX outlet (gap) 12 on the outer periphery, and its advantages are easily understood.

In other words, all of the external air that flows into the casing 3 passes through the air filter 11, eliminating problems such as read/write errors caused by floating dust, etc., and also prevents air from entering the casing and outside. The presence of the flow also provides advantages such as the ability to suppress temperature increases caused by the motor 6 and the like.

It should be noted that the present invention is not limited to the structure of the embodiment described in 1-1, but may be limited to the shape, structure, etc. of each part of the optical disc device.

It is free to modify and change as appropriate, and various modifications may be considered.

〔Effect of the invention〕

As explained below, the optical disc according to the present invention? , H, an opening for introducing outside air is formed in a portion close to the rotation center of the optical disc in the casing exterior part having a substantially hermetic structure, and an air filter of IMfF is fitted into the opening, and the optical disc is Since the air outlet is provided with a small gap near the outer periphery, it is possible to skillfully manage the negative and positive air pressure generated inside the device due to the rotation of the optical disk, etc., despite the fact that it is inside the cylinder and has an inexpensive structure. Approximately 1 is used to flow in from outside the casing.
00% of the outside air can be flowed in through the air filter, which can extremely reduce the amount of floating dust in the air inside the device, eliminating problems such as dust adhesion to the optical disk and optical head lens. This has various excellent effects such as making it possible to prevent read/write errors caused by this dust adhesion.

[Brief explanation of the drawing]

The drawing is a schematic sectional view showing an embodiment of an optical disc device according to the present invention. l... Optical disc device, 2... Optical disc (optical disc cartridge), 3... Device casing,
3a...disk loading slot, 4...optical head,
5...Support stand, 6...Spindle motor, 7...
... Clamp, 8 ... Shutter, 10 ... Opening for outside air introduction, 11 ... Air filter, 12 ...
・Air outlet.

Claims (1)

[Claims] In an optical disc device comprising a device casing with a substantially sealed structure into which a replaceable optical disc cartridge is loaded, an opening for introducing outside air is formed in a part of the exterior of the casing near the center of rotation of the optical disc cartridge. An optical disc device characterized in that an air filter that can be fitted into the opening is provided, and an air exhaust port having a slight gap is provided on the side of the casing exterior close to the outer periphery of the optical disc cartridge.