JPH05109260A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To suppress the generation of a clash hazard and to improve the reliability of the magnetic disk device by selectively sucking the harmful gaseous molecules within a hermetic container. CONSTITUTION:A filter 7a consisting of a non-woven fabric, a metal deposited filter 7b and active carbon 7c are built into a filter assembly 7 in the hermetic container 1. Silver (Ag) and copper (Cu) are used for the metal deposited filter 7b and the SOx and NOx contained in air are converted to a sulfide and nitride by combining with the silver and copper of the metal deposited filter 7b and are thereby stuck to the filter. Namely, the harmful gaseous molecules in the hermetic container 1 are removed in the form of compds. The incorporation of this metal deposited filter 7b into a respiration filter 8 is possible. The inside of the hermetic container 1 is more cleanly cleaned in this way and the generation of the clash hazard is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device having means for selectively removing gas molecules in a sealed container.

[0002]

2. Description of the Related Art Conventionally, in this type of magnetic disk device, as shown in FIG. 3, a rotary drive unit (not shown) is installed on a mounting substrate which also serves as a hermetic container 10, and the rotary drive unit is directly mounted on the rotary drive unit. A magnetic disk medium 3 for recording data is attached to the spindle 2. A magnetic head 5 held at one end of the arm 4 faces the recording surface of the magnetic disk medium 3, respectively. The arm 4 is held by a positioning mechanism 6 for positioning. Furthermore,
A filter assembly 11 for collecting dust is attached in the sealed container 10. Then, the filter assembly 11 remains (floats) in the sealed container 10 by introducing the air flow generated on the surface thereof into the filter assembly 11 when the magnetic disk medium 3 rotates as indicated by the arrow. It is configured to collect dust. The filter assembly 11 usually incorporates a filter (filter) made of a non-woven fabric and activated carbon.

Further, in the hermetically sealed container 10, a breathing filter 12 is attached to the wall surface of the hermetically sealed container 1 in order to prevent the hermetically sealed container 10 from being deformed due to a pressure difference due to the temperature difference between the inside and the outside air. . In general, a filter made of non-woven fabric is incorporated in the breathing filter 12 to prevent the inflow of dust from the outside while eliminating the pressure difference by distributing the air in the sealed container 10 and the outside air. ing.

[0004]

The structure of the filter assembly and the breathing filter used in the above-described conventional magnetic disk device is composed of only a so-called filter or a combination of a filter and activated carbon.
Then, the filter collects and removes dust in the sealed container, prevents dust from entering from the outside to make the inside dust-free, and further adsorbs harmful gas molecules from activated carbon. I am trying to clean the inside.

However, in recent years, so-called air pollution such as exhaust gas and industrial exhaust due to the increase in automobiles, etc., has a great influence on an information processing apparatus which requires a clean installation environment. The filter function is no longer able to remove these effects.

Particularly, in the magnetic disk device, when sulfur oxides (SO _x ) and nitrogen oxides (NO _x ) exist in the atmosphere, they enter the sealed container 1 and chemically react with the constituent members. And a product (for example, sulfide, nitride or peroxide) is generated on the surface thereof. And
This product may enter the minute gap between the operating magnetic disk medium and the magnetic head to cause a crash failure, and there is a drawback that the reliability of the magnetic disk device is reduced.

[0007]

According to the present invention, there is provided a magnetic disk medium for storing information, a magnetic head for recording / reproducing the information, and a positioning for positioning the magnetic head on a predetermined track of the magnetic disk medium. A magnetic disk device comprising a mechanism, a sealed container that houses the magnetic disk medium, the magnetic head, and the positioning mechanism, and a filter that collects dust in the sealed container and selectively absorbs gas molecules, The filter has a gas removing means containing a metal that selectively combines with gas molecules.

The gas removing means may be a filter coated with silver (Ag) or (Cu), and the gas removing means may be coated with silver (Ag) and copper (Cu), respectively. It may be a filter.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a vertical sectional view showing an embodiment of a magnetic disk device of the present invention.

FIG. 2 is a partial vertical sectional view showing the filter assembly 7 of FIG.

1, the spindle 2, magnetic disk medium 3, arm 4, magnetic head 5 and positioning mechanism 6 mounted in the sealed container 1 of the magnetic disk device of the present invention are the conventional example shown in FIG. Since it is the same as the constituent member of 1., the description thereof is omitted here.

As shown in FIG. 2, the filter assembly 7 used in the magnetic disk drive of the present invention has a so-called ordinary filter 7a made of a non-woven fabric inside and a metal on the surface of the non-woven fabric or the like. A filter (hereinafter referred to as a metal-coated filter) 7b and activated carbon 7c are incorporated.

Silver (Ag) or copper (Cu) is suitable as the metal used for the metal-coated filter 7b.
By adopting these metal-coated filters 7b,
Sulfur oxides (SO _x ) contained in the air in the sealed container 1
Nitrogen oxides (NO _x ) combine with silver and copper to form sulfides and nitrides, which adhere to the filter surface. That is, gas molecules harmful to the metal-coated filter 7b are selectively removed as a compound. Also, this metal-coated filter 7b
Can also be incorporated into the breathing filter 8.

For the filter assembly 7 and the breathing filter 8, a metal-coated filter coated only with silver or copper may be used alone, or both metal-coated filters may be used in combination. You may.

[0016]

As described above, according to the magnetic disk device of the present invention, the filter assembly and the breathing filter provided in the closed container of the magnetic disk device are provided with a filter having a metal coated on the surface thereof. By incorporating it, harmful gas molecules contained in the air in the sealed container are removed more selectively than before, and the generation of harmful products in the sealed container is suppressed. There is an effect that the crash failure is eliminated and the reliability of the magnetic disk device is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a magnetic disk device of the present invention.

FIG. 2 is a partial vertical cross-sectional view showing the filter assembly 7 of FIG.

FIG. 3 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

 1,10 Sealed container 2 Spindle 3 Magnetic disk medium 4 Arm 5 Magnetic head 6 Positioning mechanism 7,11 Filter assembly 7a Filter (nonwoven fabric) 7b Metal-coated filter 7c Activated carbon 8,12 Breathing filter

Claims (4)

[Claims] 1. A magnetic disk medium for storing information, a magnetic head for recording / reproducing the information, a positioning mechanism for positioning the magnetic head on a predetermined track of the magnetic disk medium, the magnetic disk medium, In a magnetic disk device comprising a sealed container that houses the magnetic head and the positioning mechanism, and a filter that collects dust in the sealed container and selectively absorbs gas molecules, the filter selectively selects gas molecules. A magnetic disk drive comprising a gas removing means containing a compounding metal. 2. The magnetic disk drive according to claim 1, wherein the gas removing means comprises a filter coated with silver (Ag). 3. The magnetic disk drive according to claim 1, wherein the gas removing means comprises a filter coated with copper (Cu). 4. The magnetic disk drive according to claim 1, wherein the gas removing means comprises a filter coated with silver (Ag) and copper (Cu).