JPH0520862A - Dustproof cooling mechanism for information recording/ reproducing mechanism - Google Patents

Abstract

PURPOSE:To provide a dustproof cooling mechanism for an information recording/reproducing system employing a disc cartridge containing an informa tion recording disc wherein information can be read out, written in and erased from the disc medium accurately without requiring a fan mechanism. CONSTITUTION:The dustproof cooling mechanism comprises a fan mechanism 5 for taking, the air into an information recording/reproducing system from the outside and a tube 1 coupled with the fan mechanism 5 for feeding the air into the system. The tube 1 extends on the main chassis 2 in the system while surrounding the moving path 2b of at least an optical head 4, and a hole 1a for ejecting the air is made through the side wall of the tube 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus such as a magnetic disk, an optical disk, a magneto-optical disk, etc., and particularly uses a disk cartridge containing a disk-shaped information recording medium which can be easily put in, taken out and stored in the apparatus. The present invention relates to a dustproof cooling mechanism of an information recording / reproducing device.

[0002]

2. Description of the Related Art An optical disk device (including a magneto-optical disk device) for reading, writing or erasing information recorded on an optical disk medium, which is a kind of information recording medium, is
In general, unlike a hermetically sealed fixed type hard disk device, when reading, writing and erasing information, the optical disk cartridges are exchanged and used, and therefore foreign matters such as dust are liable to adhere to the lens of the optical head in the device, and therefore the data It caused a read / write error.

Further, when the optical head, drive motor, or amplifier and power transistor of the printed circuit board generate heat during operation of the device, the temperature inside the device rises, and thus the laser power of a laser diode emitting laser light and the laser. In addition to shortening the life of the laser diode and changing the characteristics of the light and making it unstable, it also caused data read / write errors.

In order to solve the above-mentioned problems at the same time, a fan mechanism is provided at a predetermined position (lower part of the spindle motor) inside the optical disk device as shown in Japanese Patent Laid-Open No. 61-224190, and the air blown from there is blown against the lower surface of the disk. After hitting almost vertically, it flows along the radial direction of the disk surface and discharges foreign matters such as dust inside the device from the multiple external discharge ports provided on the side surface of the device, and at the same time the cooling effect of the drive motor and optical head The technology possessed is disclosed.

[0005]

However, the structure of such an optical disk device has the following problems. Since the fan mechanism is installed inside the optical disk device, it is inevitable to increase the size of the device, and the weight of the optical disk device is reduced.
It hindered the thinness and compactness. Since the fan mechanism is provided under the spindle motor, the cooling efficiency of the optical head is poor due to the indirect cooling structure in which warm air after directly cooling the motor is blown to the optical head. Since a foreign substance such as dust adhered on the lens of the optical head is indirectly taken, a reliable dustproof effect cannot be expected.

The present invention has been made in view of the above-mentioned problems, and solves the problem of increasing the size of a dustproof cooling mechanism of an information recording / reproducing apparatus using a disk cartridge containing a disk-shaped information recording medium. At the same time, it is an object of the present invention to provide a dustproof cooling mechanism that solves the above-mentioned problems.

[0007]

In order to solve the above-mentioned problems, the present invention inserts a disk cartridge containing a disk-shaped information recording medium into an apparatus and chucks the disk cartridge on a rotary drive motor. In an information recording / reproducing apparatus for reading, writing and erasing information by rotating the disk medium and moving a head, a fan mechanism for taking in air from the outside into the apparatus, and air connected to the fan mechanism into the apparatus. With a tube to send in,
The tube is arranged so as to surround at least the movable path of the head, and a side wall of the arranged tube is provided with a hole for ejecting air.

[0008]

Operation: The disk cartridge 6 is the spindle motor 3
The optical disk in the cartridge 6 starts to rotate, and at the same time, the fan mechanism 5 operates. The clean air taken into the device A through the filter 5b provided in the fan mechanism 5 is the air ejection hole 1
From a, it jets out into a narrow space 8 made up of the cartridge 6, the tube 1 and the main chassis 2 and directly blows off foreign matter such as dust adhering to the optical pickup lens, and
A dustproof space 8 is created by discharging the dust inside, and the head reads, writes, and erases in this space.

Further, according to the structure of the present invention, the optical head 4 and the spindle motor 3 which are heating elements can be cooled at the same time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially omitted view of an internal mechanism of an optical disc device which is a type of information recording / reproducing device, and is a schematic explanatory view mainly showing one embodiment of a dustproof and cooling mechanism of the device.

As shown in FIG. 1, an optical disk apparatus A includes an optical head 4 for chucking a disk cartridge 6 on a spindle motor 3 to detect information in an optical disk medium housed in the disk cartridge 6 and photoelectrically converting the information, and a servo control. It is provided with a printed circuit board 7 having a controller circuit for performing the above, and is configured to read, write and erase information in the optical disc.

Reference numeral 5 is a fan mechanism, and air is taken in from the outside through the filter 5b by the fan 5a. Reference numeral 1 is a tube, and 2 is a main chassis which is a housing in which an optical head 4 in the apparatus is incorporated.
The disc cartridge 6 is placed on top. The tube 1 is made of an elastic soft rubber-like member having a circular cross section, one end of which is connected to the fan mechanism 5 by an air inlet portion 1b, and the other end of which is extended to the main chassis 2 to form a substantially circular portion 1.
c is formed, and the substantially circular portion 1c is arranged so as to surround the spindle motor 3 which is a heating element and the optical head moving path 2b provided in the main chassis 2. A plurality of air ejection holes 1a are provided on the inner wall of the substantially circular portion 1c so that the air directly hits the heating element, and clean air taken in through the filter 5b in the fan mechanism 5 is ejected. Moreover, when the disk cartridge 6 is chucked, it contacts the hub 6b, which is the chucking portion of the spindle motor 3 of the disk cartridge 6, and the peripheral portion 6a of the opening 6c of the disk cartridge 6, as shown in FIG.

FIG. 2 is a sectional view of FIG. 1, and FIG. 2A is a sectional view taken along the line BB of FIG. 1 when the disc cartridge 6 is inserted into the apparatus. When the disc cartridge 6 is inserted into the apparatus A as shown in FIG. 2A, the hub 6b is chucked by the spindle motor 3 while the shutter 6d is opened by a loading mechanism (not shown), and the peripheral portion 6a of the disc cartridge 6 is opened. The tube 1 comes into contact with the cartridge holders 2a, 2a provided in the main chassis 2 and the holder 2 provided in the main body base.
The disk cartridge 6 is held parallel to the upper surface of the main chassis 2 at four points c and 2c. Here, since the diameter of the tube 1 is formed to be longer than the height of the supporting portions 2a, 2a, when the disc cartridge 6 is inserted as shown in the figure, the tube 1 is deformed and attached by its own weight. Therefore, when the disc cartridge 6 is chucked, a narrow space 8 is formed by the disc cartridge 6, the tube 1 and the main chassis 2.

Next, the operation of dust prevention and cooling by the mechanism of the present invention will be described. The disk cartridge 6 is chucked by the spindle motor 3, and the optical disk medium in the disk cartridge 6 starts to rotate, and at the same time, the fan mechanism 5 operates. The clean air taken into the device A through the filter 5b provided in the fan mechanism 5 is ejected from the air ejection hole 1a into the narrow space 8 formed by the cartridge 6, the tube 1 and the main chassis 2,
Foreign matter such as dust adhering to the lens 4a of the optical head 4 is directly blown off, and the optical head 4 and the substantially circular portion 1 of the tube 1 are blown off.
The spindle motor 3 surrounded by c is directly cooled at the same time.

Here, the wind force ejected into the narrow space 8 blows air directly on the lens 4a, so that the wind force that does not affect the optical system of the optical head 4 is given. Device A
Also has a control device that appropriately changes the wind force in response to a change in the light amount of the laser light due to a temperature rise in the device and a foreign substance such as dust attached to the lens 4a.

When chucking the disk cartridge 6, air is always ejected from the air ejection hole 1a into the narrow space 8, and the air containing dust and the like is contained in the main chassis 2
0, the air is discharged from the air discharge port 21 to the outside, and no foreign matter such as dust enters the narrow space 8 from the outside, so that the dustproof space 8a is formed. Therefore, the optical head 4 operates in the dustproof space 8a, and accurate reading, writing and erasing can be performed.

The flow of air around the optical head 4 is shown in FIG.
As shown in (a), the air ejected from the air ejection holes 1a and containing the dust and the like in the narrow space 8 passes through the side surface of the optical head (R1), and the inside of the main chassis 20 and the upper part of the VCM.
While the VCM is being cooled (R2) through the gap between the upper surface of the (Voice Coil Motor) and the VCM, warm air is discharged from the air discharge port 21 provided in the lower portion of the main chassis 2 (R3).

The portion other than the optical head, that is, the air flow in FIG. 2B, which is a sectional view taken along the line CC in FIG. 1, shows the air containing dust and the like in the narrow space 8 from the air ejection hole 1a. Is discharged toward the bottom of the inside 20 of the main chassis (R
4) While being applied to the printed circuit board 7 existing under the main chassis 2 to cool it (R5), it flows along the upper surface of the printed circuit board and is discharged from the air discharge port 21 (R5).
6).

Although the optical disk device has been described in this embodiment, the present invention can be easily applied to a magnetic disk device such as a floppy disk.

[0020]

As described above, according to the present invention, the size of the device can be reduced without providing the fan mechanism inside the device, and the heating element is the tube extending in the device in connection with the fan mechanism. Air can be blown directly from the vicinity to the optical head and spindle motor, which can reliably prevent dust and cooling, and also improve cooling efficiency.The optical head drives in the dust-proof space during operation of the device, so accurate It is possible to obtain remarkable effects such as reading, writing and erasing of various information.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a dustproof cooling mechanism of an optical disk device.

2 (a) is a sectional view taken along line BB of FIG. 1 when the disc cartridge is inserted into the optical disc device, and FIG. 2 (b) is a disc cartridge inserted into the optical disc device. 1. The CC sectional view taken on the line in FIG.

FIG. 3 is an explanatory bottom view of the disc cartridge showing a contact position of the tube.

[Explanation of symbols]

 1 tube 1a air ejection hole 2 main chassis 2b moving path 3 spindle motor 4 optical head 5 fan mechanism 6 disk cartridge 8 narrow space 8a dustproof space

Claims (1)

Claim: What is claimed is: 1. A disk cartridge containing a disk-shaped information recording medium is inserted into an apparatus, and the disk cartridge is chucked by a rotation drive motor to rotate the disk medium and move the head. In an information recording / reproducing apparatus for reading, writing and erasing information by moving, the apparatus has a fan mechanism for taking in air from the outside, and a tube connected to the fan mechanism for sending air into the apparatus. Is provided so as to surround at least the movement path of the head, and a hole for ejecting air is provided in the side wall of the tube provided, and a dust-proof cooling mechanism for an information recording / reproducing apparatus.