JPS60212880A - Floating head slider - Google Patents

Abstract

PURPOSE:To suppress the fluctuation of a floating quantity due to the variation of air inflowing direction, by providing at least two circular sliding surfaces in the air inflowing direction in keeping desired intervals between them. CONSTITUTION:The front side slider surfaces 4 and 5 and rear side slider surfaces 6 and 7 of a double-barrel type head slider 1 respectively face to each other in the transversal direction of the slider 1 with a longitudinal groove 8 between them and face to each other in the longitudinal direction with recessed sections 9 respectively having a desired width between them. Each slider surface 4-7 is selected so that their length l1 in the direction of length, width W and radius of curvature become equal to each other. The ratio of the length of each slider surface 4-7 to the width becomes W/l1 and can be made larger than conventional constitutions. Moreover, the area for receiving the pressure of air flow is increased and the buoyancy can be increased, by receiving the air flow inflowing obliquely against the longitudinal direction of the head slider 1 with the front side and rear side slider surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a floating head slider, a floating head slider for a magnetic disk drive using a %lC rotary actuator.

[Prior art]

Figure 1 is a side view showing a conventional floating RAD slider, Figure 2
The figure is a bottom view of the same, and in the figure, (1) is a head slider, and (2) and (3) are slider surfaces having arcuate curved surfaces. The slider surfaces (2) and (3) are arranged in a double-barrel shape on both left and right edges of the lower surface of the head slider (1) with a required spacing between them.

Next, to explain the operation, the hent slider (1
) is applied to a linear actuator type magnetic disk drive (not shown), the airflow advances in the longitudinal direction of the Herad slider (1) as shown by the arrow (A) in Figure 2, and moves toward the head slider (1). ) gives l/c buoyancy. On the other hand, when the head slider (1) is applied to a rotary actuator type magnetic disk device (not shown), the air flow moves around the head slider as shown by arrows (B) and (C) in FIG. (1) It flows in from a direction oblique to the longitudinal direction. In this way, when air flows in from an oblique direction and flows out diagonally across the head slider (1), the air flows out without the wedge effect of the head slider (1) being fully exerted. The pressure generated in (1) becomes smaller. As a result, the flying height of the head slider (1) becomes small, which seriously affects the recording and reproduction of information or causes a crash on the magnetic disk.

The conventional floating RAD slider is constructed as described above, but when used in a rotary actuator type magnetic disk drive as described above, the flying height fluctuates due to changes in the direction of air flow, causing the floating RAD slider to The drawback was that it could not effectively perform its functions.

[Summary of the invention]

This invention was made to improve such drawbacks,
By providing arc-shaped slider surfaces at at least two locations with the required spacing in the air inflow direction, the pressure receiving area of the air flow is increased, and even if the air inflow direction to the slider surface changes, levitation is maintained. The present invention proposes a floating head slider that can reduce fluctuations in volume.

[Embodiments of the invention]

FIGS. 3 and 4 show one embodiment of the present invention, and in the figures, (1) shows a double-barrel head slider, (
4), (5) are arcuate front slider surfaces, (6), (
7) is an arcuate rear slider surface.

Front slider surface (4L (5) and rear slider surface (6L)
) and (7) are opposed to each other with longitudinal grooves (8) in between the front and rear lower surfaces of the Rad slider (1), respectively, and the front slider surfaces (4), (5) and the rear slider The surfaces (6) and (7) are arranged to face each other with a recess (9) of a required width in between. Here, each slider surface (4) ~
In (7), the length 11 in the longitudinal direction, the width W, and the radius of curvature are selected to be equal to each other.

Next, the operation will be explained. Each slider surface (4) to (7)
) has an aspect ratio of substantially w/g+, which can be considerably larger than the aspect ratio W/l of the conventional example. Furthermore, the airflow flowing in at an angle with respect to the long longitudinal surface of the Hent slider ( ) is controlled by the front slider surface (4), (
5) and the rear slider surfaces (6) and (7), the pressure receiving area of the airflow increases and the floating blade can be enlarged, so the curve shown by the solid line in Fig. 5 As compared with the conventional curve shown by the dotted line, even if the air inflow angle, that is, the yaw angle with respect to the longitudinal direction of the Hent slider (1) becomes larger, the reduction in flying height can be suppressed. Therefore, the air inflow direction is the Herad slider (1
), as well as rotary actuator magnetic disk drives where the air inflow direction is inclined with respect to the longitudinal direction of the Herad slider (1). It becomes possible to accurately record information and reproduce information from a magnetic disk.

In the above embodiment, the front slider surface (4),
(5) and the rear slider surfaces (6) and (7) have the same shape, but the invention is not limited to this, and as shown in FIG. 6, the rear slider surface ( 6)
, (7), the radius of curvature r, of the front slider surface (4), (
It can also be made smaller than the radius of curvature r1 in 5). In this case, the pressure generated on the front slider surfaces (4) and (5) is greater than that on the rear sliders (6) and (7), so the head slider (1) is magnetically It has the advantage of being tilted to the front end with respect to the disk surface, making it possible to float stably.

In addition, as shown in FIGS. 8 and 9, the lengths of the KS rear slider surfaces (6) and (7), and the lengths of the front slider surfaces (4) and (
5) Long 81. Even if the scent is made shorter, the same effect as above can be obtained.

Further, in each of the above embodiments, the case where two slider surfaces, one on the front side and the other on the rear side, are provided has been described, but the present invention is not limited to this, and three or more slider surfaces may be formed.

〔Effect of the invention〕

As explained above, in this invention, the arcuate slider surfaces are provided at at least two locations with a required interval maintained in the air inflow direction, so that fluctuations in flying height due to changes in the air inflow direction can be suppressed. This has the effect of making it possible to stably float the floating head slider and perform accurate recording and reproduction regardless of the direction of air inflow.

[Brief explanation of drawings]

1 and 2 are a side view and a bottom view showing a conventional floating head slider, FIGS. 3 and 4 are a side view and a bottom view showing an embodiment of the present invention, respectively, and FIG. 5 is a slider. A characteristic curve diagram showing the relationship between the yaw angle and the flying height using the aspect ratio as a parameter; FIGS. 6 and 7 are side views showing other embodiments of the present invention, and explanatory drawings showing the flying posture thereof, FIGS. 8 and 9 are a side view and a bottom view, respectively, showing still another embodiment of the present invention. In the figure, (1) is a hent slider, (4), (5)
is the front slider surface, (6) and (7) are the rear slider surface,
(8) is a longitudinal groove, and (9) is a recess. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent: Patent Attorney Masuo Oiwa (and 2 others) Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 8 Figure 9

Claims (1)

[Claims] 11) A floating hent slider characterized in that arc-shaped slider surfaces are provided at at least two locations with a required interval maintained in the air inflow direction. (2) The floating hent slider according to claim 1, wherein the radius of curvature of the rear slider surface is smaller than the radius of curvature of the front slider surface. (3) Claim 1 characterized in that the length of the rear slider surface is shorter than the length of the front slider surface.
Floating head slider as described in section.