JPS62231488A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To increase the hygroscopic effect of the air of the inner part of a disk enclosure and to cope with even an abrupt humidity variation by providing a vent hole communicating the high air pressure spot and low pressure spot caused by an atmospheric pressure difference generating means and the container storing a moisture absorbent in the inner part. CONSTITUTION:A disk enclosure incorporates the container 5 having a vent hole at the high and low spots of the air pressure of the air stream caused by the rotation of a magnetic disk and having a moisture absorbent in the inner part. With the rotation of the magnetic disk 2, the air pressure at the center of the rotation is reduced, so the air stream 4 flowing toward outside from the center of the magnetic disk 2 is caused in the air of the inner part of the disk enclosure 1. The container 5 storing a moisture absorbent has vent holes 6a, 6b, which communicates to the center of a magnetic disk rotating mechanism 3 by a duct 7. An air pressure difference is thus caused on the vent holes 6a, 6b. The inside air of the disk enclosure 1 becomes passing through the container 5 storing the moisture absorbent and the air moisture is absorbed by the moisture absorbent.

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a magnetic disk device.

[Conventional technology]

In a disk drive/closure (hereinafter abbreviated as DE) type magnetic disk drive,! The magnetic disk and magnetic head are of the so-called contact start-stop type, in which the magnetic disk and magnetic head are in contact with each other when the rotation of the disk plate starts and stops. Contact may cause an adsorption phenomenon between the two. If the magnetic disk is rotated while the attraction phenomenon is occurring, serious damage will be caused to the magnetic head or the magnetic disk. This adsorption phenomenon.

Because it is greatly related to the humidity inside the DE,
It may contain one drug.

Conventionally, in this type of magnetic disk drive, a moisture absorbent is stored in a container with one ventilation hole, and this is built into the DB.
The moisture inside is absorbed by the moisture absorbent by diffusion through the ventilation holes.

To explain this with reference to FIG. 3, the disk enclosure 11 includes a magnetic disk 12. ! Container 14t- containing air disc rotation mechanism 13 and moisture absorbent 15
It is accommodated. In this figure, the magnetic head and magnetic head drive mechanism are not shown for the sake of simplicity.

The air inside the disk enclosure 11 is vented through the ventilation hole 1.
Moisture is absorbed by the moisture absorbent 15 by diffusion through the disk enclosure 11, thereby preventing an increase in humidity inside the disk enclosure 11.

[Problem that the invention seeks to solve]

In the conventional device described above, the moisture inside the DE is absorbed into the moisture absorbent through the ventilation holes by diffusion, so the moisture absorption effect is small, and L) it cannot cope with sudden changes in humidity inside the DE. Although it can be applied temporarily, it has the disadvantage of high humidity.

[Means for solving problems]

The present invention attempts to solve the above-mentioned drawbacks of the conventional device by actively absorbing the air inside the DE with a moisture absorbent to enhance the moisture absorption effect. It has a built-in means for generating high and low atmospheric pressure inside the device, and a container with a ventilation hole and containing a moisture absorbent inside.

〔Example〕

Next, an embodiment of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a magnetic disk drive is completely sealed from the outside air or communicated only with a breathing filter, and has a magnetic head inside.

A magnetic head drive mechanism, a magnetic disk, and a magnetic disk rotation mechanism are all housed in one disk locker. A container 5 having ventilation holes at high and low pressure points of the air flow generated by the oral transmission of the magnetic disk and containing a moisture absorbent inside the container 5 is built into the disk effusion body.

When the magnetic disk 2 rotates, the air pressure at the center of rotation becomes low, so that an air flow 4 is generated in which the air inside the disk nick roller 1 flows outward from the center of the magnetic disk 2. Ventilation holes 6a, 5b are provided in the container 5 containing the moisture absorbent.
The 1 ventilation hole 6b comes out through the duct 7 to the center of the magnetic disk rotation (1! structure 3).This creates a pressure difference between the ventilation holes 5a and 6b, and the air inside the disk enclosure 1 The air will pass through the container 5 containing the hygroscopic agent, and the air will be absorbed by the hygroscopic agent.

Next, a second embodiment of the present invention will be described with reference to FIG.

The air inside the disk enclosure 1 is fed by a blower 25VC driven by a motor 24 through a ventilation hole 29 to a container 26 containing a moisture absorbent 27, and after absorbing moisture, the air inside the disk enclosure 1 is passed through the entire ventilation hole 28. be discharged.

〔Effect of the invention〕

As explained above, the present invention has a ventilation hole that communicates a place with a high pressure and a place with a low pressure generated by a pressure difference generating means, and a container containing a moisture absorbent inside. It has the effect of increasing the moisture absorption effect of the air and being able to cope with sudden humidity changes◇

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view showing a second embodiment of the invention, and FIG. 3 is a sectional view showing a conventional device.

Claims (3)

[Claims] (1) In a magnetic disk drive having a disk enclosure housing a magnetic head, a magnetic head drive mechanism, a magnetic disk, and a magnetic disk rotation mechanism, a pressure difference generating means for generating a high pressure area and a low pressure area inside the disk enclosure; and a dehumidifying container having a ventilation hole that communicates the high pressure and low pressure areas and containing a moisture absorbent therein. (2) The magnetic disk device according to claim (1), wherein the air pressure generating means is a magnetic disk that generates an air flow by rotation. (3) The magnetic disk device according to claim (1), wherein the air pressure generating means is a blower provided in the disk enclosure.