JPS6383989A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce the trouble caused by the adsorption phenomenon due to moisture between the surface of a magnetic disk plate and a magnetic head by installing a filter-shaped disk which is connected to a rotating spindle, in a protective cover to supply dry air. CONSTITUTION:A protective cover 6 is provided with a space 8 where a magnetic disk plate 1 or the like is stored and a space 9 pneumatically isolated from the space 8, and a filter-shaped disk 10 connected to a spindle 3 is arranged in the cover 6, and the outside edge part 11 of the disk 10 is sharpened. A chamber 13 having an air hole 12 connected to the outside is provided in a part of the space 9, and the outside edge part 11 of the disk 10 is in this chamber 13. That is, air 14 is supplied to the disk 10 through a filter 7 by the pressure difference between the outside and the inside of the protective cover 6. Air 15 from which dust is eliminated has moisture 16 eliminated with the centrifugal force of the disk 10 by the filter material of the disk 10 and is supplied as dry air from an air hole 19 of the spindle 3 onto the surface of the magnetic disk plate 1. Thus, the adsorption phenomenon due to moisture is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device [delta] which has an improved structure for preventing moisture adsorption between a magnetic disk plate and a magnetic head.

[Prior Art] Generally, in a magnetic disk drive, the gap between a magnetic disk plate and a magnetic head that reads information from or writes information to the magnetic disk plate is extremely narrow, and moisture can cause the gap to deteriorate. adsorption phenomenon is likely to occur.

Conventionally, as a structure to prevent this gap adsorption phenomenon, magnetic disk drives were equipped with only an air filter, or
Alternatively, some had an air filter and a desiccant such as silica gel.

[Problems to be solved] In the above-mentioned conventional magnetic disk drives, those equipped with only an air filter have no dehumidifying effect at all, and those equipped with an air filter and a desiccant such as silica gel do not have any dehumidification effect. However, only the air that comes into contact with the silica gel is dehumidified, so the dehumidification effect is unstable, and there are problems with the maintenance of the silica gel.

[Means for Solving Problems] The present invention solves the above-mentioned conventional problems, and provides a magnetic disk plate, a magnetic head for reading data written on the magnetic disk plate or writing data to the magnetic disk plate, and a magnetic disk. a hollow spindle 1 provided with air holes for supplying air flow onto the plate; a spindle drive motor for rotating the magnetic disk plate and the spindle; and a spindle drive motor for rotating the magnetic disk plate and the spindle, a head drive motor for moving the magnetic disk in the direction; and the magnetic disk plate;
In a magnetic disk drive comprising a protective cover having an air filter that protects a magnetic head and a spindle from the outside world, a space in the air filter portion of the protective cover is isolated from a space containing the magnetic disk plate and the magnetic head, and the air A filter-shaped disk with a sharp outer edge installed at the tip of the spindle is provided in the space of the filter section, and the outer edge of the disk is connected to the outside world through an air hole in the space between the outer edge and the protective cover. It has a structure with several rooms.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a magnetic disk device according to an embodiment of the present invention.

In the figure, a magnetic head 2 is installed on a magnetic disk plate 1, and is configured to read data from the magnetic disk plate 1 or write data to the magnetic disk plate 1. The magnetic disk plate 1 is rotated by a spindle 3 which rotates via a spindle drive motor 4. on the other hand,
The magnetic head 2 is moved in the radial direction of the magnetic disk plate 1 by a head drive motor 5.

These magnetic disk plate 1, magnetic head 2, and spindle 3 are protected from the outside world by a protective cover 6 having an air filter 7.

The protective cover 6 is provided with a space 8 in which the magnetic disk plate 1 and the like are housed, as well as an air-isolated space 9, and a filter-shaped disc 10 connected to the spindle 3 is disposed in the space 9. There is. The outer edge 11 of this disc 10 is sharply shaped. A chamber 13 having an air hole 12 for connection with the outside world is provided in a part of the space 9, and the outer edge 11 of the disk 10 is located in this chamber 13.

Next, the operation of the magnetic disk drive having the above configuration will be explained with reference to FIG. That is, in this magnetic disk drive, air 14 is supplied from the outside world through the air filter 7 to the filter-shaped disk 10 installed in close proximity due to the pressure difference between the outside world and the inside of the protective cover 6.

Next, air 15 from which dust is removed by an air filter
is a rotating disk connected to a rotating spindle 3.
Moisture 1 is removed by the filter material of disk 10 due to centrifugal force of 0.
6 is removed, becomes moisture 17, and moves to the outer edge 11 of the disk 10 by centrifugal force, and this moisture 17 is further transferred to the outer edge 11 of the disk 10.
Water droplets 18 are released from the outer edge 11 of the water droplet 18 .

The air 15 from which the moisture 16 has been removed becomes dry air, passes through the hollow part of the spindle 3, and is supplied onto the surface of the magnetic disk plate 1 from the air hole 19 of the spindle 3.

The water droplets 18 are discharged to the outside world from the air holes 12 of the chamber 13 as water vapor 20 by the heat of the magnetic disk device.

[Effects of the Invention] As explained above, in the magnetic disk device of the present invention, the filter-like disk connected to the rotating spindle is installed inside the protective cover, so dry air can be supplied by the magnetic disk plate. As a result, it is possible to reduce troubles caused by moisture adsorption occurring in the gap between the surface of the magnetic disk plate and the magnetic head.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of a magnetic disk device according to an embodiment of the present invention, and FIG. 2 is an enlarged view showing the main parts of the device. 1: IFI disk plate 2: Magnetic head 3 Nissin spindle 4 Nissin spindle drive motor 5: Head drive motor 6: Protective cover 7: Air filter 8.9: Space
lO: Disk 11: Outer edge 12, 19: Air hole 13: Chamber
14, 15: Air 16.17: Moisture 18:
Water droplet 20: water vapor

Claims (1)

[Scope of Claims] A magnetic disk plate, a magnetic head that reads data written on the magnetic disk plate or writes data to the magnetic disk plate, and an air hole for supplying air flow onto the magnetic disk plate. a hollow spindle provided, a spindle drive motor that rotates the magnetic disk plate and the spindle, a head drive motor that moves the magnetic head in a radial direction of the magnetic disk plate, the magnetic disk plate, and the magnetic head. and a protective cover having an air filter that protects the spindle from the outside world, wherein a space for an air filter section of the protective cover is isolated from a space containing the magnetic disk plate and the magnetic head, and the air filter section A filter-like disk with a sharp outer edge installed at the tip of the spindle is provided in the space, and a chamber connected to the outside world through an air hole is provided in the space between the outer edge of the disk and the protective cover. A magnetic disk device characterized by comprising: