JPS5972679A - Magnetic head for magnetic disc device - Google Patents

Abstract

PURPOSE:To obtain a magnetic head having less floating amount even if a yaw angle is generated, by providing a gentle circular arc or slope for floating in the floating direction and in the direction orthogonal to it. CONSTITUTION:A floating face 4 is provided with a gentle slope 5 for floating in th floating direction and with a gentle slope 15 also in the direction orthogonal to the floating direction. Even if a yaw angle is produced and there exists an angle between the floating direction and the tangential direction of the track of the disc, a dynamic pressure is produced effectively in the tangential diection of the track. As a result, even if the yaw angle is generated, the magnetic head has less floating amount.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention writes data while floating in a gas disk device using the principle of a power gas bearing.

This relates to a magnetic head that performs reading.

Conventionally, as a magnetic head installed in a magnetic disk device,
There is one shown in Figure 1 or Figure 2.

In the figure, (a) is a magnetic head, (4) is a floating surface for floating the magnetic head on a rotating magnetic disk, which will be described later, (
5) is an inclined surface formed on the air inlet side to effectively generate dynamic pressure; 6) is a core portion for writing and reading data.

Next, the operation will be explained. Figure 3 shows the return type head drive! ! i! This is a magnetic disk device with a structure.

(7) is a rotating/rotating magnetic disk that stores data; (8) is a floating head crest 1Fr; a support spring that supports it under a predetermined pressure; An arm that holds the assembly, αQl, a swinging pivot shaft for rotating the head tll, (Ill is a motor that generates a driving force to rotate the head).

In head 11), there is a closed loop b is a waste loop Lυ cape L
The head is positioned at any track on the disc (7), but the swing type head waits horizontally after being driven.

If the circumferential direction of the track and the floating direction of the head are the same, there are at most 10 tracks in terms of area on the board. For other tracks, the tangential direction of the track and the floating direction of the head are at some angle. This is called the yaw angle.

Figure E'4 shows how the yaw angle is increased. In Figure 4, the radial direction of the track (
The yaw angle is expressed as the angle between 7) and the direction (A) perpendicular to the floating direction of the head.

In track B, the two directions are the same, but in tracks A and C, the yaw angle is in the direction of the head r (
It has become.

In conventional heads, a very gentle arc or slope for releasing the pressure metal is formed only in the floating direction of the head, and when a yaw angle is added, the rotation of one disk becomes #. This has the disadvantage that the airflow flowing through the head and the floating direction of the head form an angle, reducing the effect of generating dynamic pressure and greatly reducing the floating force of the floating lid.

The slope of the side surface in FIG. 2 is a larger slope than that of the floating lid, and has no effect on floating.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and is formed in the floating direction of the head.
There is a very gentle circular arc b.In addition to the inclined surface, by forming a very gentle circular arc or the entire inclined surface in the direction perpendicular to the floating direction, even if a yaw angle occurs, the floating The overall objective is to provide a complete magnetic head with less needle drop.

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 5, (4) is a floating surface for floating the magnetic head +11 on the rotating magnetic solid plate, +51d is an inclined surface attached in the floating direction to effectively generate dynamic pressure, and +61fl is the data. The core section performs writing and reading twice, and these are the same as in the prior art. (15j is a very gently inclined surface provided on both sides of the floating surface (4) in a direction perpendicular to the floating direction according to the present invention.

Next, the operation will be explained. The magnetic head according to the present invention is fully mounted on a swing type head drive mechanism.

As in the past, closed-loop or open-loop control
When positioning is performed on an arbitrary track on the rotating magnetic disc, the yaw angle is increased at a track with a deviation of 7jh on the 0 disc. That is, in the tangential direction of the track on one disc and in the floating direction of the head.

Some angle is added, but always along the tangential direction of the track, since in the direction perpendicular to the floating direction, a very gently sloped surface is formed.

Effective dynamic pressure is generated, resulting in less reduction in floating amount. A very gently sloped surface is one whose angle is greater than 0 degrees and approximately 1 degree.

In the above example, a gentle slope rMJ[151 was formed in the direction perpendicular to the floating direction, but a corresponding gentle circular arc may be used.

Further, in the above embodiment, there are only two floating surfaces, but according to the present invention, the yaw angle of the oscillating head-driven magnetic head is 190 or more, even if there are one or three or more floating surfaces. When added, there is little reduction in the floating amount and the floating is stable, so the quality of magnetic signal readout can be improved and high reliability can be obtained.

[Brief explanation of the drawing]

1 and 2 are trihedral views showing a conventional magnetic head for a floating sealed magnetic disk, and FIG. 3 is a principle diagram showing a swing positioning structure of the magnetic head. FIG. 4 is an explanatory diagram showing how a yaw angle is applied on nine discs, and FIG. 5 is a three-sided view of a magnetic head according to an embodiment of the present invention. In the figure, (1)...magnetic head, (4)...floating surface,
(5)...Slanted surface, (6)...Core part e' (15
1...Slope surface. Note that the same line numbers in Figure 1 indicate the same parts corresponding to fc. Agent Makoto Kuzuno - Figure 1 Figure 1 Figure 2 Figure 4 Figure 5 / Ta30'

Claims (1)

[Claims] It has an oscillating head drive mechanism, and moves an information read/write head in an arc shape on a magnetic disk while floating it based on the principle of a power gas bearing, and moves it to any desired track. In a magnetic disk drive for positioning, the shape of the floating surface has a very small arc or slope in the floating direction, which causes the floating surface to float slightly, and also has a very gentle circular arc in the direction perpendicular to the floating direction. Or, if there is an inclined surface, the floating direction and the tangential direction of the rotating disk have an angle '! Also in case of c. A magnetic head for a magnetic disk device characterized by a small decrease in floating amount.