JPH05159559A - Air filter device for magnetic disk - Google Patents

Abstract

PURPOSE:Toenhance the capturing ability of dust particles inside a magnetic disk device, to keep a cleanliness degree at the inside of the magnetic disk device in a short time and to prevent that a magnetic disk and a magnetic head are damaged by the dust particles. CONSTITUTION:Filter media 2, 3 are arranged respectively at two parts on the side of an air inflow port 14 and on the side of an air discharge port 15 inside an air filter case provided near a magnetic disk 7. The filtration rate of the filter medium 2 arranged on the side of the air inflow port 14 is low, and the filtration rate of the filter medium 3 arranged on the side of the air discharge port 15 is high. Thereby, the capturing ability of dust particles inside a magnetic disk device is enhanced, the amount of the dust particles can be reduced in a short time and it is possible to prevent that the magnetic disk and a magnetic head are damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk air filter device, and more particularly to a magnetic disk air filter device having an air filter in a closed container.

[0002]

2. Description of the Related Art FIG. 2 is a schematic diagram showing a configuration example of a magnetic disk device. The carriage 6 on which the magnetic head is mounted can be driven by the voice coil motor 7 in the radial direction of the magnetic disk 4. The magnetic head 5 floats above the magnetic disk by the air flow generated by the high speed rotation of the magnetic disk 4, and information can be recorded / reproduced in the closed container 8. If there is dust in the closed container 8, the dust may enter the gap between the magnetic disk 4 and the floating magnetic head 5 and damage the magnetic disk 4 and the magnetic head 5, which may damage the magnetic disk device. May cause fatal crashes. In order to avoid this crash failure, the air filter 20 is placed in the closed container 8.
Is provided, the air flow generated by the rotation of the magnetic disk 4 is used to capture the dust in the closed container as the air flow passes through the air filter 20, and the inside of the closed container is kept clean.

[0003]

The conventional magnetic disk drive utilizes the airflow generated by the rotation of the magnetic disk as described above, and the airflow passes through the air filter to capture the dust in the closed container. Was there. However,
There is a drawback that the dust cannot be sufficiently captured even if the air flow passes through the air filter once, and the dust is circulated again in the closed container. Further, there is a drawback that it takes a long time to keep the inside of the closed container clean. An object of the present invention is to provide an air filter device for a magnetic disk capable of reducing the dust in the closed container in a short time and keeping it clean by increasing the dust capturing ability, and preventing damage to the magnetic disk or the magnetic head. Especially.

[0004]

In order to achieve the above object, an air filter device for a magnetic disk according to the present invention is arranged near a magnetic disk in an airtight container and has an air inlet at one end and the other end. In a magnetic disk air filter device having a filter case having an air outlet and an air filter member provided in the filter case, the air filter member provided in the filter case is provided with It is provided in two places of the delivery port. Further, the air filter member in the air inlet portion may be an air filter having a low filtration rate, and the air filter member in the air outlet portion may be an air filter having a high filtration rate.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of an air filter device for a magnetic disk according to the present invention. Filter case 1 of air filter device 13 housed in a closed container
Has an air inlet 14 at one end and an air outlet 15 at the other end. Inside the filter case 1, filter media a2 and b3 are provided as air filter members. The filter media a2 are arranged on the air inlet 14 side and the filter media b3 are arranged on the air outlet 15 side. Other configurations are the same as those of the conventional example shown in FIG.

When the power of the entire magnetic disk device is turned on, the magnetic disk 4 mounted on the spindle motor 9 rotates counterclockwise at a high speed as in the case shown in FIG. 2, and an air flow is generated in the closed container. .. The air flow in the closed container 8 passes through the filter medium a2 arranged on the air inlet 14 side of the filter case 1 to capture the dust in the closed container 8. However, it is difficult to capture all the dust in the closed container 8 by passing the air flow only once, and the dust that cannot be completely captured recirculates in the closed container 8 and tries to pass through the filter medium a2. Therefore, by passing the air flow to be recycled again through the filter medium b3 arranged on the side of the air outlet 15 of the filter case 1, it is possible to capture the dust that cannot be captured by the filter medium a2 by the filter medium b3. That is, the dust in the closed container 8 does not circulate many times, and the dust can be captured by the air flow passing through the air filter device once. As a result, the inside of the closed container 8 can be kept clean in a short time.

The air inlet 14 of the filter case 1
By using a member having a low filtration rate for the filter material a2 on the side and a member having a high filtration rate for the filter material b3 on the air outlet 15 side, when the air flow in the closed container 8 passes through the air filter device, The dust particles having a large particle size are captured by the filter medium a2, and the dust particles having a small particle size are captured by the filter medium b3.
That is, when the filter media a2 and the filter media b3 have the same filtration rate, when the filter media a2 cannot capture the dust having a small particle size that cannot be captured by the filter media a2, the filter media b3 may not be able to capture it. By using a filter having a high filtration rate of the filter material a2, the effect can be further enhanced by shortening the time for capturing the dust in the closed container 8. Therefore, it is possible to prevent the dust in the closed container 8 from circulating many times, so that the magnetic disk 4 and the magnetic head 5 can be prevented.
It is possible to prevent dust from entering a gap between the magnetic disk 4 and the magnetic disk 4 and prevent damage to the magnetic disk 4 and the magnetic head 5.

[0008]

As described above, the air filter device for a magnetic disk according to the present invention is provided with the air filter members at the air inlet portion and the air outlet portion, respectively. The air flow inside passes through the two filter media in the filter case, and the dust trapping ability can be improved. Therefore, the dust in the closed container can be reduced and kept clean in a short time, and damage to the magnetic disk and the magnetic head can be prevented. This has the effect of improving the reliability of the magnetic disk device.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of an air filter device for a magnetic disk according to the present invention.

FIG. 2 is a front view showing an example of a magnetic disk device.

[Explanation of symbols]

 1 ... Filter Case 2 ... Filter Material a as Air Filter Member 3 ... Filter Material b as Air Filter Member 4 ... Magnetic Disk 5 ... Magnetic Head 6 ... Carriage 7 ... Voice Coil Motor 8 ... Sealed Container Path 9 ... Spindle Motor 10 ... Air Filter Device

Claims (2)

[Claims] 1. A filter case, which is arranged near a magnetic disk in a closed container, has an air inlet at one end and an air outlet at the other end, and an air filter provided in the filter case. A magnetic disk air filter device having a member, wherein the air filter member provided in the filter case is provided at two locations, an air inlet portion and an air outlet portion. .. 2. The air filter member in the air inlet portion is an air filter having a low filtration rate, and the air filter member in the air outlet portion is an air filter having a high filtration rate. Air filter device for magnetic disk described.