JPH0279287A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent dust from entering by providing an independent rotary vane mechanism rotated with the use of the wind force of magnetic disc rotation, taking in the external air through a vent hole provided at the upper part of the rotary shaft of the rotary vane mechanism, and making the air pass through a filter provided at the vent hole. CONSTITUTION:In a magnetic disk device, which accommodates plural laminated magnetic disks 1 and plural magnetic heads 2 arranged so as to face the magnetic disks 1 in a hermetically sealed enclosure 5, a rotary vane mechanism 4 to rotate by air flow generated by the rotation of the magnetic disk 1, a vent hole 3 provided at the upper part of the rotary shaft of the rotary vane mechanism of the hermetically sealed enclosure 5, and the air filter at the lower part of the vent hole 3 are provided. Due to the rotation of the rotary vane mechanism 4, the pressure near the center of the rotary shaft is decreased, the external air can be introduced from the vent hole 3 of the housing 5 into the housing 5, the introduced air is cleared through an air filter 6, and enters to the housing 5. Thus, even when the both edges of the rotary shaft of a disk rotary mechanism is supported, the air cleaning can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device in which a magnetic disk and a magnetic head are housed in a sealed container.

[Conventional technology]

In recent years, magnetic disk drives have increased their storage capacity and volume, and their recording densities have also been improved. Along with this, the flying height of the magnetic head above the rotating magnetic disk has also become smaller, reaching submicron levels. It has become a value. Therefore, it is essential to maintain the air inside the sealed container containing the magnetic disk and magnetic head in a clean state, and for this purpose, air filters are appropriately installed in the breathing holes provided in the sealed container. Various airflow mechanisms are constructed. The main purpose of a general airflow mechanism is to prevent dust in the outside air from entering the sealed container and to quickly collect dust generated inside the sealed container.

[Problem to be solved by the invention]

To achieve this purpose, conventional magnetic disk drives
An air filter is placed in the middle of the air flow path generated by the rotation of the magnetic disk to remove dust generated inside the sealed container. This can occur at the housing joints of the device, so as a means to prevent this, a breathing hole equipped with an air filter is installed near the center of rotation of the magnetic disk. This takes advantage of the fact that the pressure is lowest at the center of the rotating body, and intentionally introduces outside air that has been purified by an air filter into the sealed container. The pressure near the housing joint is increased to prevent dust from entering from the outside.

As mentioned above, in conventional magnetic disk drives, it is necessary to provide a breathing hole above the rotating shaft of the magnetic disk. Therefore, when the magnetic disk rotating mechanism has a double-supported structure, that is, both ends of the rotating shaft are supported by bearings. The disadvantage is that this cannot be achieved if the housing is fixed to the housing via a .

[Means to solve the problem]

The magnetic disk device of the present invention is a magnetic disk device in which a plurality of stacked magnetic disks and a plurality of magnetic heads disposed opposite to the magnetic disks are housed in a sealed container, and the magnetic disk drive rotates as the magnetic disks rotate. a rotating blade mechanism that rotates by the air flow generated by the air flow, a breathing hole provided in a portion of the sealed container above the rotation axis of the rotating blade mechanism, and an air filter disposed below the breathing hole. There is.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
FIG. 2 is a partial cross-sectional view taken along a vertical plane including a line connecting the centers of the magnetic disk and rotating blade mechanism of the illustrated embodiment.

As shown in FIGS. 1 and 2, this embodiment mainly consists of a magnetic disk 1 and a magnetic head 2, and is hermetically housed in a housing 5 with other mechanical parts built-in.
Moreover, the rotating blade mechanism 4 is also housed inside the housing 5. A breathing hole 3 for ventilation with the outside is provided in a portion of the housing 5 above the rotating shaft of the rotating blade mechanism 4. An air filter 6 is disposed below the breathing hole 3.

Next, the effect obtained by such a configuration will be explained.

The direction indicated by arrow C in the figure indicates the direction in which air flows within the housing 5, and the direction shown by arrow C in the figure indicates the direction in which air flows within the housing 5.
(in the direction of arrow B), an air flow is generated, and this air flow drives the rotation of the rotary blade mechanism 4 (in the direction of arrow B).As the 0-rotation blade mechanism 4 rotates, the pressure near the center of its rotation axis decreases. . Therefore, external air is introduced into the housing 5 from the breathing hole 3 of the housing 5 provided above the rotating shaft (arrow D).The air introduced from the outside passes through the air filter 6 and is purified. Go inside 5 (arrow E).

〔Effect of the invention〕

As explained above, the magnetic disk device of the present invention includes an independent rotary blade mechanism that rotates using the wind force of the rotation of the magnetic disk in the housing, and a housing that is provided above the rotation axis of the rotary blade mechanism. External air is taken in mi-likely through the breathing hole, and this air is purified by passing through a filter installed in the breathing hole, thereby increasing the pressure at sealing parts such as housing joints, and removing dust from the outside air. Intrusion can be completely prevented; therefore, the air inside the housing can be kept clean at all times, and the rotating shaft of the magnetic disk rotating mechanism can be supported at both ends, thus improving the reliability of the magnetic disk device. It has the effect of being able to

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
3 is a partial cross-sectional view of the illustrated embodiment; FIG. 1...Magnetic disk, 2...Magnetic head, 3...
Breathing hole, 4... Rotating blade mechanism, 5... Housing,
6...Air filter.

Claims (1)

[Claims] In a magnetic disk device in which a plurality of stacked magnetic disks and a plurality of magnetic heads arranged opposite to the magnetic disks are housed in a sealed container, the magnetic disks are rotated by an air flow generated as the magnetic disks rotate. A magnetic disk drive comprising: a rotating blade mechanism; a breathing hole provided in a portion of the sealed container above a rotating shaft of the rotating blade mechanism; and an air filter provided below the breathing hole.