JPS6247890A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To reduce the frictional force between a magnetic head and a magnetic disk by providing a nozzle in the vicinity of the contact point between the head and the disk to spray dry air to dry the contact face between them. CONSTITUTION:A magnetic head 3 is in contact with a magnetic disk 1 when the disk 1 has no revolution. A nozzle 2 is set adjacent to the contact part between the disk 1 and the head 3. Thus dry air is sprayed to the contact face between the disk 1 and the head 3 through the nozzle before the disk 1 is rotated. As a result, humidity is reduced at a place close to the contact face and therefore the frictional force is reduced between the head 3 and the disk 1. This can eliminate an adsorbing trouble without affecting the disk 1 or the head 3 at all.

Description

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

[Conventional technology]

In a CSS type magnetic disk device, when a magnetic disk (hereinafter abbreviated as a disk) stops rotating, a magnetic head (hereinafter abbreviated as a head) is in contact with the disk. For this reason, an attraction phenomenon occurs between the head and the disk, and the sliding friction between the head and the disk may increase. When the disk is rotated in such a case, excessive stress is applied to the head in the direction of rotation by the disk, which may sometimes damage the head or the disk.

For this reason, in conventional devices, before rotating the disk, the head slides a very small amount in the theta direction on the disk surface to reduce the sliding friction between the head and the disk and prevent damage to the head or disk due to the above-mentioned adsorption phenomenon. It is said that

[Problem that the invention seeks to solve]

However, since the above-mentioned means causes the head to slide while the disk is stationary, even though the amount is extremely small, excessive stress is applied to the head. This may reduce the reliability of the head, and also limits the amount of sliding, reducing the original effect.

The present invention provides a magnetic disk drive that reduces the attraction force by utilizing the fact that the attraction force generated between the head and the disk is largely related to the surrounding humidity.

[Means for solving problems]

The present invention is a magnetic disk drive characterized in that a nozzle is installed for blowing dry air near the area where the magnetic head and the magnetic disk are in contact with each other during startup to dry the contact area.

〔Example〕

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

In FIG. 1, the magnetic head 3 is in contact with the disk 1 when the magnetic disk 1 is not rotating. A nozzle 2 is installed adjacent to the contact portion, and dry air is blown through the nozzle 2 onto the contact surface between the disk 1 and the head 3 before the disk 1 is rotated. Nozzle 2 is the second
It is connected to the air blower 9 shown in the figure. The blower 9 is composed of a fan 6, a heating element 5, and a filter 4, and the air sucked through the intake port 8 is heated by the heating element 5.
Even the smallest amount of dust is filtered by the filter 4 and exhausted from the exhaust lower by the fan 6.

〔Effect of the invention〕

As explained above, in order to prevent damage to the head or disk caused by rotating the disk when the head and disk are in an adsorbed state, dry air is blown near the contact surface between the head and the disk to prevent contact. By lowering the humidity near the surface, the frictional force between the head and the disk is lowered, which has the effect of preventing the above-mentioned adsorption accident without affecting the head or the disk in any way.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram of an air blower used in the present invention.

Claims (1)

[Claims] (1) In a CSS type magnetic disk drive in which the magnetic head is in contact with the magnetic disk when the magnetic disk stops rotating, dry air is supplied to the area where the magnetic head and the magnetic disk are in contact during startup. A magnetic disk device characterized by being equipped with a nozzle for spraying and drying a contact surface.