JPH06314486A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To provide a magnetic disk device capable of selectively adsorbing and removing molecules of noxious gas. CONSTITUTION:A filter assembly 7 for adsorbing molecules of noxious gas in a magnetic disk device is incorporated into the device. This filter assembly 7 consists of a fibrous filter 7a and thin film filters having gas adsorbing function disposed on the surface of the filter 7a. The filters having gas adsorbing function include a silver filter 7b, a copper filter 7c and a carbon filter 7d.

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 capable of selectively adsorbing and removing harmful gas molecules invading the inside and outside of the magnetic disk device.

As shown in FIG. 2, a conventional magnetic disk device is provided with a rotary drive unit (not shown) for a disk, which is installed on a mounting substrate 10A which is a part of a sealed container 10 which is a main body case. A plurality of magnetic disk media 13 for recording various data are coaxially mounted at predetermined intervals on a spindle 12 which is directly connected to a rotation drive unit for disks. Further, on the recording surface of the magnetic disk medium 13, the magnetic head 15 held at the tip of the arm 14 is attached.
Are arranged to face each other. And this arm 1
4 is held by a positioning mechanism 16 for positioning.

Further, a breathing filter 18 is provided in a part of the hermetic container 10 of the magnetic disk device, and the hermetic container 10 is equipped with a filter assembly 7 for collecting dust. When the magnetic disk medium 13 rotates, the filter assembly 7 guides the air flow generated on the surface thereof into the filter assembly 7 so as to collect dust remaining (floating) in the magnetic disk device. Has been done. The filter assembly 7 usually incorporates a filter made of fibers and activated carbon (see, for example, Japanese Utility Model Laid-Open No. 3-37696). Further, the breathing filter 18 is designed to prevent the intrusion of dust from the outside while eliminating the pressure difference by distributing the air in the magnetic disk device and the outside air.

[0004]

However, in the filter assembly 7 in the above-mentioned conventional magnetic disk device, in view of the material used, the filter assembly 7 is toxic and enters from the inside of the magnetic magnetic disk device and from the outside air. Adsorption corresponding to various gas molecules is not always sufficient, which may cause a head crash failure of the magnetic head due to partial stacking (unevenness) of gas molecules adhering to the magnetic disk surface. There is a disadvantage that the characteristics cannot be effectively maintained and the reliability of the magnetic disk device is impaired.

[0005]

It is an object of the present invention to improve the disadvantages of the prior art, and in particular, to selectively adsorb and remove toxic gas molecules that enter the magnetic disk drive and with the outside air, resulting in a head crash failure. It is an object of the present invention to provide a magnetic disk device capable of suppressing the above and improving the reliability of the magnetic disk device.

[0006]

According to the present invention, a plurality of magnetic disk media mounted on a spindle at predetermined intervals, a magnetic head equipped corresponding to each magnetic disk media, and each magnetic disk. A magnetic disk device comprising a plurality of arms for supporting the head, a positioning mechanism for rotationally driving each arm to position each magnetic head, and a main body case for accommodating the positioning mechanism and each constituent member. A breathing filter is installed in a part of the case, and a filter assembly is installed in the airflow passage in the main case. A thin film filter having a gas adsorption function is attached to the outer peripheral surface of the filter assembly. This aims to achieve the above-mentioned object.

[0007]

The sulfur oxide SOx or nitrogen oxide NOx contained in the air in the magnetic disk device is combined with silver or copper forming the gas adsorption film to form a sulfide or a nitride, which is fixed on the filter surface. Also, carbon adsorbs chloride contained in the air. This allows effective absorption of toxic gas molecules.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic structural view of a filter assembly 7 of a magnetic disk device showing an embodiment of the present invention, which is an enlarged view of a main part of FIG. 2 used for explaining a conventional example. Is.

As shown in FIG. 1, the filter assembly 7 of the magnetic disk drive of this embodiment comprises a normal filter 7a made of fibers and silver, copper and carbon deposited or plated on the surface of the filter 7a. The silver filter 7b, the copper filter 7c, and the carbon filter 7d provided are provided.

By using the silver filter 7b and the copper filter 7c which are vapor-deposited or plated on the surface of the filter 7a made of fibers, sulfur oxide SOx and nitrogen oxide NOx contained in the air in the magnetic disk device are reduced. It combines with silver and copper to form sulfides and nitrides and adheres to the filter surface. Further, the carbon filter 7d vapor-deposited or plated on the surface of the filter 7a adsorbs chloride contained in the air in the magnetic disk device and fixes it on the filter surface. That is, poisonous gas molecules become compounds and can be selectively removed by the actions of the silver filter 7b, the copper filter 7c, and the carbon filter 7d provided on the surface of the filter 7a made of fibers.

The filters 7b, 7c, and 7d can also obtain the same operation even if they are incorporated into the breathing filter 18 shown in FIG.

Further, the filter assembly 7 and the breathing filter 18 include silver filter 7b and copper filter 7c on the fiber surface.
And the case where the carbon filter 7d is provided independently,
It is also adopted to arbitrarily combine these.

[0014]

Since the present invention is constructed and operates as described above, it is possible to form a thin film filter having a gas adsorption function on the fiber surface of the filter assembly in the magnetic disk device. As a result, compared with the prior art, the poisonous gas molecules that enter from the inside and outside air of the magnetic disk device are selectively adsorbed and removed, and the occurrence of head crash failure due to these is suppressed, and the reliability of the magnetic disk device is improved. It is possible to provide an excellent magnetic disk device which is not possible in the past.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a filter assembly of a magnetic disk device showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a magnetic disk device in which a conventional filter assembly is incorporated.

[Explanation of symbols]

 7 Filter Assembly 7a Fiber Filter 7b Silver Filter 7c Copper Filter 7d Carbon Filter 10 Sealed Container as Main Body Case 12 Spindle 13 Magnetic Disk Medium 14 Arm 15 Magnetic Head 16 Positioning Mechanism

Claims (3)

[Claims] 1. A plurality of magnetic disk media mounted on a spindle at predetermined intervals, a magnetic head mounted corresponding to each magnetic disk media, and a plurality of arms supporting each magnetic head. In a magnetic disk device including a positioning mechanism that rotationally drives each arm to position each magnetic head, and a main body case that houses the positioning mechanism and each of the constituent members, a part of the main body case is provided. A magnetic disk equipped with a breathing filter, a filter assembly in the air flow passage in the main body case, and a thin film filter having a gas adsorption function on the outer peripheral surface of the filter assembly. apparatus. 2. The magnetic disk drive according to claim 1, wherein the thin film filter is composed of a metal-containing thin film made of silver, copper, carbon or the like. 3. The thin film filter is composed of a metal-containing thin film made of an arbitrary combination of members such as silver, copper and carbon.
The magnetic disk device described.