JPH0432477B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] Airtightness of a magnetic disk device, such as a head disk assembly (HDA) type or a disk enclosure (DE) type, in which a magnetic disk, a magnetic head, etc. are housed in an airtight container to form a module structure. In an air circulation filtration device provided in a container, the dust removal efficiency is improved by configuring the air blocked by a spoiler to be guided directly to the inlet of the air filter.

[Industrial application field]

The present invention relates to an air circulation filtration device provided within an airtight container of a fixed media type magnetic disk device.

Magnetic disk drives are broadly classified into removable media type and fixed media type based on device implementation.

Among these, fixed media type devices include recording media and
By housing the recording medium drive shaft, magnetic head, carriage (magnetic head drive system), etc. in an airtight container, it is modularized, and progress is being made in simplifying the structure, reducing the size, lowering the price, and increasing the recording density. .

A modular device as described above is generally referred to as a head disk assembly type or a disk enclosure type, and sufficient measures are taken to prevent dust from entering from the outside.

However, generation of dust inside the airtight container cannot be avoided. Therefore, it is necessary to provide a means to completely remove this.

[Conventional technology]

Fig. 3 is an explanatory diagram of a conventional example, where a is an axial sectional view and b is an axial sectional view.
is a plan view at a, 1 is a magnetic head, 2 is a magnetic disk rotating as shown by arrow A, 3b is provided in front of the magnetic head 1 in the direction of relative movement with the magnetic disk 2, and 3b is provided in front of the magnetic head 1 in the direction of relative movement with the magnetic disk 2 4 is an airtight container, and 5b is a circulation type air filter.

For example, in the case of an 8 1/4 inch magnetic disk device,
The spoiler 3b is provided so that a gap of about 1 mm is created between the spoiler 3b and the surface of the magnetic disk 2.

Therefore, the airflow that moves along with the surface of the magnetic disk 2 is blocked by the spoiler 3b.
It is guided toward the outer circumference of the magnetic disk 2 along its leading edge in the direction of arrow B. After that, the air mainly flows in the direction of arrow C, flows through the air filter 5b in the direction of arrow D, and the purified air flows in the direction of arrow E.
The air inside the airtight container 4 is circulated and filtered as shown in FIG.

[Problem that the invention seeks to solve]

In the air circulation filtration device having the above configuration, a part of the air once guided to the outer circumferential side of the magnetic disk 2 by the spoiler 3b remains unfiltered by the air filter 5b, and remains in the magnetic direction as shown by the arrow F. There is a problem that the liquid flows to the head 1 side.

Therefore, an object of the present invention is to filter the air taken out to the outer peripheral side of the magnetic disk 2 by the spoiler 3b by the air filter 5b as much as possible before flowing it to the magnetic head 1 side. .

[Means for solving problems]

As shown in the principle diagram of the present invention shown in FIG. 1, the above purpose is to provide an air filter 5 made of a good thermal conductor and a spoiler 3 integrally in a structure in which a magnetic disk is rotatably provided in an airtight container. The air filter is installed directly adjacent to the outer periphery of the magnetic disk 2, and the air inlet and air outlet are tangential to the magnetic disk, and the spoiler magnetically controls the air flow accompanying the rotation of the magnetic disk. The spoiler is guided to the outer circumferential side of the disk and is provided at a position so as to lead directly to the inlet of the air filter, and the outer end is connected to the side wall of the air filter so that the spoiler surface is substantially flush with the air inlet. This is achieved by an air circulation filtration device characterized by:

[Effect]

That is, the air filter 5 is brought close to the outer periphery of the magnetic disk 2, and the spoiler 3 is arranged so that the air guided toward the outer periphery of the magnetic disk 2 by the spoiler 3 is directly guided to the air inlet of the air filter 5. By providing this, air completely filtered by the air filter 5 is allowed to flow toward the magnetic head 1 side.

Furthermore, since the air filter and spoiler are integrally constructed of a good thermal conductor, the temperature distribution in each part of the magnetic disk can be made uniform.

〔Example〕

FIGS. 2a and 2b are configuration diagrams of the embodiment, where a is a plan view and b is a view taken along the Y arrow.

The spoiler 3a and the housing of the air filter 5a are integrally made of aluminum alloy, which is a good thermal conductor.

Further, the air filter 5a has one side wall 51 close to the outer periphery of the magnetic disk 2, and the other side wall adjacent to the airtight container 4.

As a result, the air guided to the outer circumferential side of the magnetic disk 2 by the spoiler 3a can almost completely flow to the air filter 5a, so that the air is completely filtered by the air filter 5a. Air flows towards the magnetic head 1.

Further, by making the spoiler 3a from a good thermal conductor, the temperature distribution in each part of the magnetic disk 2 can be made uniform, and off-track can be prevented.

In addition, by integrating the spoiler 3a and the air filter 5a, it is possible to reduce the weight, volume, and number of parts.

〔Effect of the invention〕

As explained above, according to the present invention, the air taken out to the outer peripheral side of the magnetic disk by the spoiler can almost completely pass through the air filter, and the air that has passed through the air filter can be passed to the side of the magnetic head. Since the magnetic head can be poured into the water, the filtration efficiency can be improved and the magnetic head can be prevented from being contaminated by dust.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of the present invention, FIGS. 2a and 2b are configuration diagrams of an embodiment, and FIG. 3 is an explanatory diagram of a conventional example. In the figure, 1 is a magnetic head, 2 is a magnetic disk, 3 is a spoiler, 4 is an airtight container, and 5 is an air filter.

Claims (1)

[Claims] 1. In a configuration in which a magnetic disk is rotatably provided in an airtight container, an air filter 5 made of a good thermal conductor and a spoiler 3 are integrally provided,
The air filter is installed directly adjacent to the outer periphery of the magnetic disk 2, and the air inlet and air outlet are tangential to the magnetic disk, and the spoiler directs the air flow accompanying the rotation of the magnetic disk. The spoiler is guided toward the outer periphery and is provided at a position so as to lead directly to the inlet of the air filter, and the outer end is connected to the side wall of the air filter so that the spoiler surface is substantially flush with the air inlet. An air circulation filtration device characterized by: