JPH02281486A - Magnetic head core slider - Google Patents

Abstract

PURPOSE:To make two floating surface equal in floating quantity by making the two floating surfaces different in width and positioning the wide floating surface on the side of the center of rotation of a medium. CONSTITUTION:The magnetic medium is provided with a magnetic gap for writing and reading an information signal and the two floating surfaces 11a and 11b for floating the magnetic gap at a fine interval with a magnetic medium surface. Then the width la of the floating surface 11a is made larger than the width lb of the floating surface 11b and the wide floating surface 11a is used on the rotation center side of the medium. Consequently, the floating quantity of the floating surface 11a on the rotation center side of the medium is equalized to that of the other floating surface 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head for a magnetic disk device, which is an external storage device for a computer.

[Conventional technology]

Conventionally, this type of magnetic head core slider has a magnetic gap 2 for writing or reading information signals, as shown in FIG.
1 is provided with two floating surfaces 22a and 22b that levitate the magnetic medium (not shown) rotating at high speed with a small constant gap. Floating surface 22a.

The widths (la', rib') of each of 22b were made equal (i.e. 12 a'=u b').

[Problem to be solved by the invention]

In the conventional magnetic helical core slider described above, the two air bearing surfaces are made to have the same width, so the circumferential speed of the medium at the position of the slider on the side of the rotation center of the medium is different from that of the other slider. There is a disadvantage that there is a difference in the floating blades received by each of the two floating surfaces, and the floating metal of the slider on the rotation center side is smaller than that of the other slider.

This becomes more noticeable as the magnetic head core slider approaches the center of rotation of the medium, and due to the recent trend toward miniaturization, as the diameter of the medium becomes smaller, the difference in flying height becomes non-negligible.

[Means to solve the problem]

The magnetic head core slider of the present invention is a magnetic head core slider comprising a magnetic gap for writing or reading information signals on a rotating magnetic medium, and two floating surfaces that levitate the magnetic gap at a minute constant gap from the surface of the magnetic medium. The air bearing surface located on the rotation center side of the medium has a width larger than that of the other air bearing surface.

〔Example〕

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

Referring to FIG. 1 showing one embodiment of the present invention, an air bearing surface 1
41mI of 1a! a is made larger than the width 1b of the air bearing surface 11b. This magnetic head core slider must be used so that the wider air bearing surface 11a is on the side of the center of rotation of the medium.

As a result, the flying height of the air bearing surface on the side of the rotation center of the medium can be made equal to that of the other air bearing surface, but @, ffa, and A'b of the actual air bearing surface are determined by calculation and experiment. It is necessary to determine the flying height to be equal and to obtain a predetermined flying height.

Note that the size relationship between the two air bearing surfaces shown in FIG. 1 may be reversed depending on the rotational direction of the medium and the orientation of the magnetic head core slider.

〔Effect of the invention〕

As explained above, the present invention makes the flying height of the two air bearing surfaces equal by changing the widths of the two air bearing surfaces of the magnetic head core slider and using the wider air bearing surface on the center of media rotation. There is an effect that it can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional Herad slider. 11a, llb... air bearing surface, 21...
magnetic gap. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] In a magnetic head core slider that includes a magnetic gap for writing or reading information signals on a rotating magnetic medium and has two floating surfaces that levitate the magnetic gap at a minute constant gap from the surface of the magnetic medium, A magnetic head core slider characterized in that the width of one air bearing surface is larger than the width of the other air bearing surface.