JPS62164204A - floating head slider - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a floating head slider, and in particular, a floating head slider suitable for reducing the drop and fluctuation of flying height in a swing arm type magnetic disk drive having YAW angle characteristics. Regarding the head slider.

[Background of the invention]

A conventional slider using a swing arm method for floating a floating head slider for a magnetic disk device while maintaining a small gap with the magnetic disk is disclosed in, for example, Japanese Patent Laid-Open No. 60-2278.
It is shown in No. 2. As shown in FIG. 4, the floating head slider 1 is composed of floating rail surfaces 2a, 2b and air inflow slope surfaces 3a, 3b.

The pressure distribution of the air flow generated by the rotation of the magnetic disk has two positive pressure generating parts before and after the slider, resulting in a fairly stable flying height. However, as the swing arm moves, the YAW angle of the slider 1 changes, the pressure loss of the incoming air increases, and the flying height of the slider 1 changes.
As shown by the curve ■ in FIG. 3, it changes depending on the radial position of the magnetic disk. YAW angle of slider 1 and slider 1
The relationship is such that the flying height is greatest at a YAW angle of 0 degrees, and the flying height is smallest at a YAW angle of, for example, the inner circumferential position n.

As described above, in the conventional slider 1, the flying height draws a parabola due to the movement of the swing arm, causing fluctuations in the flying height. Note that as the flying height fluctuates, the flying condition of the slider becomes unstable, and the slider comes into contact with the magnetic disk, destroying the magnetic film of the magnetic disk and shortening the life of the magnetic disk.

[Purpose of the invention]

An object of the present invention is to reduce the drop in flying height at the inner circumferential position of the magnetic disk caused by the YAW angle of the floating head slider due to the movement of the swing arm, and the pressure loss of the incoming air. An object of the present invention is to provide a floating head slider suitable for suppressing fluctuations in flying height depending on the radial position of a disk.

[Summary of the invention]

In the present invention, the levitation rail is formed at an angle to a line perpendicular to the air inflow end, and the levitation rail is configured to suppress fluctuations in the levitation height. be.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a floating head slider 10. FIG. slider 10
is the angle α with respect to the line 2 perpendicular to the air inflow end 11
The center rail 15 includes a pair of floating rail surfaces 12 having an air inflow slope surface 13 and a gap portion 14 that allows writing and reading.

FIG. 2 shows a trajectory 19 drawn on a magnetic disk 18 by the floating head slider 10 used in FIG.
It is a model diagram showing the W angle.

In FIG. 1, a cylinder 1i is pressed into the center of the floating head slider 10.
F acts to permit pitching and rolling motion of the slider 10. In FIG. 2, as the magnetic disk 18 rotates in the six directions of arrows, air is drawn between the floating rail surface 12 and the magnetic disk 18 to generate pressure, and the slider 10
surface.

The swing arm 16 has the same configuration as the conventional one, and the floating head slider 10 has only one attachment point on the swing arm 16 like the conventional floating head slider. (inner circumferential position of the magnetic disk 18) and β3 (outer circumferential position). β2 indicates the intermediate position between Pl and β3. The center line of the magnetic disk 18 passing through β2 is show.

According to the above floating head slider 10, the center line CL of the floating rail surface 12 is
When the floating head slider 10 is located at β2, the angle with respect to the disk center line is β1, and when the floating head slider 10 reaches β2, the angle becomes β2, and the floating head slider 10 is at β3.
When the angle β3 is reached, the angle β3 is reached. ), β1〈β2〈β
There is a relationship of 3. Further, the angle α is such that when the floating head slider 10 is located at Pl, the angle β1 is 90°.
β1 is 90 degrees. Also, if the angle obtained by subtracting 90 degrees from the angle β1 (β2.β3) is the YAW angle θ, then the Y△W angle becomes zero when the floating head slider 10'h<P+, and β2
, β3.

Looking at the relationship between the YAW angle θ and the pressure loss and pressure generation efficiency of the incoming air, when the YAW angle is zero, the pressure loss is the minimum, the pressure generation efficiency is the maximum, and the YAW
As the angle increases, pressure loss increases and pressure generation efficiency decreases.

According to this embodiment, when the floating head slider 10 is located on the inner circumferential side of the magnetic disk 18, the pressure generation efficiency of the incoming air becomes maximum, and the flying height is increased compared to the conventional one, and the midpoint in FIG. Move from m1 to nl.

The angle β1 is set to be 90 degrees when the slider 10 is located at Pl, and β1 is 90 degrees.

Furthermore, if the angle obtained by subtracting 90 degrees from the angle β1 (β2.β3) is the YAW angle θ, the YAW angle becomes zero when the floating head slider 10 is located at Pl, and β2
, β3.

Looking at the relationship between the YAW angle θ and the pressure loss and pressure generation efficiency of the incoming air, we see that when the YΔW angle is -〇 - zero, the pressure horn loss is at its minimum and the pressure generation efficiency is at its maximum. As the angle increases, pressure loss increases and pressure generation efficiency decreases.

According to this embodiment, when the floating head slider 10 is located on the inner circumferential side of the magnetic disk 18, the pressure generation efficiency of the incoming air becomes maximum, and the flying height is increased compared to the conventional one, and the midpoint in FIG. Move from m1 to nl.

Floating head slider 101J The height will be approximately the same as before. As the floating head slider 10 moves further toward the outer circumference, the pressure generation efficiency of the incoming air further decreases.
The flying height of the floating head slider 10 is reduced compared to the conventional one, and moves from the midpoint m2 in FIG. 3 to nl.

As described above, the flying height of the floating head slider 10 increases on the inner circumferential side of the magnetic disk 18 and decreases on the outer circumferential side, as shown by the curve 3 in FIG. 3, compared to the conventional one. As can be seen from the figure, fluctuations in the flying height of the flying head slider 10 due to movement of the swing arm 16 are reduced, the flying head slider 10 operates stably, and the floating head slider 10 is prevented from unnecessary contact with the magnetic disk 18. Such inconveniences can be reliably avoided without damaging the magnetic film, and the life of the magnetic disk 18 will not be unduly shortened.

〔Effect of the invention〕

According to the present invention, the pressure generation efficiency of the incoming air acting on the floating rail is maximized when the floating head slider is located on the inner circumferential side of the magnetic disk, and the floating head slider moves toward the outer circumferential side of the magnetic disk. Since it is configured to reduce the flying height at the inner circumferential position of the magnetic disk, it is possible to suppress the flying height at the outer circumferential position of the magnetic disk, thereby reducing the movement range of the floating head slider. The flying height remains approximately constant over the period of time, suppressing fluctuations in the flying height, and stabilizing the operation of the floating head slider. This has the effect of avoiding the inconvenience of unduly shortening the lifespan.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the floating head slider of the present invention upside down, FIG. 2 is an enlarged model diagram showing the mounted state of the floating head slider of FIG. 1, and FIG. FIG. 4 is a perspective view of an example of the conventional floating head slider. DESCRIPTION OF SYMBOLS 10... Floating head slider, 11... Air inflow end, 12... Rail surface for floating, 13... Air inflow slope surface, 14... Gap part, 15... Center rail, 16... ...Swing arm, 18...Magnetic disk, 19...Trajectory. Figure 1

Claims (1)

[Claims] In a floating head slider consisting of an air inflow slope surface and a floating rail surface for maintaining a minute air gap with a magnetic disk and floating the disk, when the floating head slider is located on the inner circumferential side of the magnetic disk, the pressure of the inflowing air increases. The floating rail is aligned with a line perpendicular to the air inflow end so that the generation efficiency is maximized and the pressure efficiency of the inflow air decreases as the floating head slider moves toward the outer periphery of the magnetic disk. A floating head slider characterized by being provided at an angle.