JPH0330229B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a floating head slider, particularly a magnetic disk storage device or a magnetic drum storage device, in which airflow generated by rotation of a disk or drum or pressurized gas from the outside is used. Accordingly, the present invention relates to a floating head slider that supports a floating head floating on a rotating surface.

[Prior art]

FIG. 1 shows a conventional floating head slider 1, which has side rails 2 as floating surfaces on both sides of its surface, and a taper 3 formed at the end of the side rails 2 on the air inlet side. As shown in FIG. 2, the floating head slider 1 is fixed to the tip of a tapered support elastic plate 4 by means of adhesive, etc., and the support elastic plate 4 is fixed to a support arm 5 as shown in FIG. It is attached to one end of the frame by, for example, gluing, screwing, or the like. In the rotating arm method, the support arm 5 rotates around the shaft 6,
The track on the moving recording medium 7 (hereinafter referred to as disk) is positioned.

As the disk 7 rotates, the floating head slider 1 draws air drawn by the disk surface between the side rail 2 serving as a floating surface and the disk surface, and floats due to the air pressure. On the other hand, the floating head slider 1 is supported by an elastic support plate 4, and receives a pressing force from the elastic support plate 4 against the disk 7. Therefore, head slider 1
is the balance between the above two forces, and the attitude and the like when floating the gap distance with the disk 7 are determined.

FIG. 4 is a schematic side view of the floating head slider 1 in a floating state, in which the support elastic plate 4 is shown in the shape of a coil spring. In a stable floating state, a pitch angle δ occurs in the floating head slider 1, and the distance t between the air outlet end of the floating head slider 1 and the disk 7 is
is the minimum. In magnetic recording, the shorter the distance between the head 8 and the disk 7, the better the recording and reproducing characteristics.
The head 8 is attached to the air outlet end of the floating head slider 1.

When the pitch angle δ does not occur on the floating head slider 1, no moment is applied to the supporting elastic plate 4 and the floating head slider 1.

Since the conventional floating head slider 1 is constructed as described above, when the floating head slider 1 is moved over the disk 7 by rotation of the support arm 5, the distance between the head 8 and the disk 7 changes. do. As this distance increases, recording and reproducing characteristics deteriorate. Furthermore, if the distance becomes too small, the movable head slider 1 and the disk 7 are likely to come into contact with each other, resulting in a so-called head crash.

There are two reasons why the distance between the head 8 and the disk 7 changes. One is that when the head position changes, the distance from the center of rotation of the disk 7 changes.
Therefore, the traveling speed of the disk 7 changes, and the air pressure generated on the floating surface changes. The other one is that when the support arm 5 is rotated, the floating head slider 1
The angle formed by the direction of the disk 7 and the running direction of the disk 7 shown by the arrow 9 (the yaw angle shown in Fig. 1) changes, and the larger this yaw angle, the lower the air pressure acting on the floating surface. Ta.

Therefore, in order to obtain good recording and reproducing characteristics, it is desirable to reduce the distance between the head 8 and the disk 7 to such an extent that head crash does not occur, and to minimize changes in the distance.

[Summary of the invention]

This invention was made to improve these drawbacks, and aims to reduce the drop in pressure applied to the floating surface when the yaw angle is made, and to reduce the change in the distance between the head and the disk depending on the position of the disk surface. The present invention proposes a floating head slider that can obtain good recording and reproducing characteristics.

[Embodiments of the invention]

FIG. 5 shows an embodiment of the present invention. In FIG. 5, the side rail 2 serving as the floating surface of the floating head slider 1 is arranged such that the air outflow side is higher than the mounting surface of the support elastic plate 4. angle θ
It is a configuration that is tilted.

With the above configuration, in the floating state shown in FIG. 6, a moment that lowers the air outflow side of the floating head slider 1 and increases the pitch angle δ is applied to the supporting elastic plate 4 (schematically shown in FIG. 6). (represented in the form of a coil spring) to the floating head slider.

As described above, in the floating head slider of the present invention, a moment is applied in the pitch angle direction in the floating state, so that the pitch angle in the floating state becomes large. If the pitch angle δ is large in the flying state, the decrease in the distance from the disk on the air outflow side when the yaw angle is made is small.

Next, I will explain the reason. The pressure created on the side rail surface as a floating surface is caused by two effects: One of them is the wedge effect. In a normal floating state, a pitch angle δ occurs, and the side rail surface and the disk form a wedge-shaped space, and air flowing into this wedge-shaped space is compressed to generate pressure. The other one is the movement effect. Air compressed by the wedge effect at the taper 3 of the side rail 2 flows into the flat part of the side rail and generates pressure also in the flat part of the side rail.

Adding a yaw angle reduces the pressure due to movement effects, mainly on the side rail flats. This pressure drop occurs because the direction of the air flow is no longer parallel to the longitudinal direction of the side rail flat portion, and the compressed air leaks out from the side rail flat portion.

The pressure generated on the flat part of the side rail is determined by the pitch angle δ
When δ is large, the contribution of the wedge effect is large, and when the pitch angle δ is small, the contribution of the movement effect is large. Therefore, the larger the pitch angle δ, the smaller the pressure drop when the yaw angle is applied.

In the above embodiment, the side rail 2 serving as a floating surface is sloped, but the mounting surface for the support elastic plate 4 may be sloped as shown in FIG.

〔Effect of the invention〕

As explained above, the present invention is such that the side rail, which serves as the floating surface of the floating head slider, is inclined with respect to the mounting surface of the support elastic plate, that is, it is inclined higher toward the air outflow side. It is possible to increase the pitch angle during levitation and reduce the drop in flying distance when the yaw angle is adjusted. Therefore, in a rotating arm type magnetic disk device, the distance change between the head and the disk due to the position of the head on the disk is reduced.
This has the effect that changes in recording and reproducing characteristics due to changes in distance can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional floating head slider, Fig. 2 is a perspective view of the floating head slider attached to a support elastic plate, Fig. 3 is a schematic diagram of a rotating arm type magnetic disk device, Fig. 4 is a schematic diagram of a floating state of a conventional floating head slider seen from the side, Fig. 5 is a perspective view of a floating head slider according to an embodiment of the present invention, and Fig. 6 is a schematic diagram of a floating state of a floating head slider of the present invention. FIG. 7 is a perspective view of a floating head slider according to another embodiment of the present invention. In the figure, 1 is a floating head slider, 2 is a side rail, 3 is a taper, 4 is a support elastic plate, 5 is a support arm, 6 is a shaft, 7 is a disk, and 8 is a head. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. Side rails are provided on both sides of the surface facing the moving recording medium, the side rails are tapered on the air inflow side, and a head is attached on the air outflow side, and the displacement perpendicular to the recording medium surface is controlled via a supporting elastic plate. Fixed to a support arm with a degree of freedom and a degree of freedom inclined from the surface of the recording medium, and by balancing the air pressure drawn in by the movement of the moving recording medium or the air pressure from the outside and the elastic pressing force of the support elastic plate, A floating head slider in which the distance between the moving recording medium and the recording medium is determined, and the side rail surface is tilted toward the traveling direction of the recording medium and toward the medium surface in the absence of pressure from an air flow. A floating head slider characterized in that the side rail is inclined with respect to the mounting surface of the support elastic plate in a direction that becomes higher toward the air outflow side.