JPS60243878A - Negative pressure type floating head slider - Google Patents

Abstract

PURPOSE:To decrease the distance between a head and a recording medium by forming a negative pressure generating part on a floating surface which is formed on a convex surface and also setting the center of the generated negative pressure at a position closer to the outflow end of an air current matter containing a head than the supporting position of a slider supporter. CONSTITUTION:A convex floating surface 1 has a small contact area with a recording medium 7, and adsorption is not secured easily between the surface 1 and the medium 7 in a contact mode. In a run mode of the medium 7, the flowing air is compressed between the medium 7 and a negative pressure type floating head slider and therefore the pressure A higher than the peripheral level is generated on the surface 1 and a tapered surface 2. While an air current passing among the surface 4, a positive pressure surface 5 and the surface of the medium 7 produces the negative pressure B owing to the level difference between both surfaces 4 and 5 as a position closer to a head 6 than the position where the pressure C of a slider supporter is applied. Thus the distance is reduced between the head 6 and the medium 7 to improve the recording density.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention provides a method in which, when the recording medium is stopped, the head slider contacts the recording medium, and as the recording medium moves, the head slider floats up. This invention relates to a so-called contact start/stop (C8S) type floating hent slider.

[Prior art]

A conventional floating RAD slider of this type is shown in FIG. FIG. 1 is a perspective view showing a conventional floating RAD slider. In the figure, 1 is a floating surface that is a flat surface with small surface roughness, 2 is a tapered surface for letting air flow in, and 3 is a mounting surface to which a head such as a magnetic head (not shown) is attached.

Next, the operation of the conventional floating RAD slider shown in FIG. 1 will be described. In the contact start/stop method of the floating Rad slider as shown in the figure, when the recording medium (not shown) is stopped, the floating surface 1 is pressed against the surface of the recording medium by the pressing force of the support spring of the slider support (not shown). There is.

When the recording medium starts to travel, the air flowing between the recording medium and the floating surface 1 and tapered surface 2 generates positive pressure, pushing the RAD slider up towards the surface of the recording medium. When the recording medium stops, the positive pressure disappears, and the floating hent slider comes into contact with the recording medium again. The posture of the RAD slider is determined by the positive pressure of air and the pressing force from the slider support. The floating RAD slider is elastically supported in the direction perpendicular to the surface of the recording medium and in the rotating direction of two axes within the surface of the recording medium including the pitch angle θ shown in FIG.

Since the conventional floating slider is constructed as described above, in the contact start strag method, when the recording medium is stopped, the floating slider is in contact with the recording medium. Since the floating surface 1, which is the contact surface at this time, has a small surface roughness as well as the recording medium surface, an adhesion phenomenon is likely to occur between the floating surface 1 and the recording medium surface. If this suction force is strong, a large force will be applied to the rad slider and its support spring when the recording medium is next started up, resulting in breakage or damage to the recording medium. Therefore, it has been proposed to give the surface of the floating surface 1 a curvature in the longitudinal direction to reduce the contact area with the recording medium and weaken the adsorption force (
% Publication No. 58-21329). However, if the floating surface 1 has a curvature, when the RAD slider floats to the surface, the minimum gap between the floating RAD slider and the recording medium will be in the middle of the floating surface 1, so that the head cannot be attached to the surface. If the mounting is done in this way, the gap between the surface 3 and the recording medium will be large. In general, in magnetic recording, the smaller the distance between the head and the recording medium, the higher the recording density can be, but in the above situation, the distance becomes larger than the lower limit determined by the surface roughness of the recording medium, etc. There was a drawback that

[Summary of the invention]

This invention was made with the purpose of improving the above-mentioned drawbacks of the conventional slider.In a floating Hent slider, the floating surface is formed into a convex curved surface, and a negative pressure generating section is provided on this floating surface. By locating the center of the negative pressure generated by the negative pressure generating section of the slider support body closer to the outflow end of the gas flow with the head than the support position of the slider support, the gap between the head and the recording medium can be reduced. The object of the present invention is to provide a negative pressure type flying head slider that can reduce the distance between the two sides.

[Embodiments of the invention]

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

FIGS. 2(a) and 2(b) are a plan view and a vertical cross-sectional view showing a negative pressure type floating RAD slider according to an embodiment of the present invention. In each figure, 1 is a floating surface that is a convex curved surface with small surface roughness and has a curvature in the longitudinal direction, and -2 is a tapered surface for allowing air to flow in. Reference numeral 4.5 denotes a negative pressure generating surface and a positive pressure surface for forming negative pressure, which constitute the negative pressure generating section. A stepped portion between the negative pressure generating surface 4 and the positive pressure surface 5 and a support position of a slider support (not shown) are also formed at the rear.

FIGS. 3 and 4 are explanatory diagrams showing the levitation state of the negative pressure type levitation RAD slider of FIG. 2 when there is no negative pressure generating section and when there is a negative pressure generating section, respectively.

In each figure, 6 is a head such as a magnetic head, 7 is a recording medium, A is a positive pressure, B is a negative pressure, and C is a pressing force from a slider support (not shown).

Next, the operation of the negative pressure flying head slider shown in FIG. 2, which is an embodiment of the present invention, will be described. While the recording medium 7 is at rest, the floating surface 1 of the negative pressure floating hent slider is in contact with the recording medium 7. Since the floating surface 1 is formed into a convex curved surface, the contact area with the recording medium 7 is small. Therefore, during the above-mentioned contact, the floating surface 1 and the recording medium 7 are difficult to attract. When the recording medium 7 is running,
On the floating surface 1 and the tapered surface 2, the incoming air is compressed between the recording medium 7 and the negative pressure type floating Hent slider, and a pressure higher than that of the surroundings is generated. Furthermore, the air flow passing between the negative pressure generating surface 4 and the positive pressure surface 5 and the surface of the recording medium 7 has a pressure lower than that of the surroundings due to the stepped portion between the negative pressure generating surface 4 and the positive pressure surface 5, that is, negative pressure. occurs. Without such a negative pressure generating section, the floating posture of the head slider is determined only by the pressing force C and positive pressure A from the slider support, as shown in FIG. In the posture determined in this way, since the floating surface l has a curvature, the minimum gap position between the floating surface l and the recording medium 7 is not at the rear end where the head 6 is located. However, in the negative pressure type floating RAD slider having a negative pressure generating section as in the present invention, the adsorption force between the floating surface 1 and the surface of the recording medium 7 lowers the load capacity of the negative pressure type floating RAD slider. At the same time, a moment is applied to the negative pressure floating hent slider in the direction of increasing the pitch angle θ by rotating the support point of the slider support. For this reason, if the pitch angle θ of the RAD slider is large, by bringing the above-mentioned minimum clearance position closer to the head 6, the head 6
The distance between the recording medium 7 and the recording medium 7 can be reduced, thereby enabling higher density recording.

In the above embodiments, the negative pressure generating section is formed by a reverse step, but it may be formed by a taper or a combination of a taper and a step.

〔Effect of the invention〕

As explained above, in the present invention, in a flying head slider, the floating surface is formed into a convex curved surface, and a negative pressure generating section is provided on the floating surface, and the center of the negative pressure generated by the negative pressure generating section is Since the support position of the slider support is configured to be located close to the outflow end of the gas flow provided with the head, the distance between the head and the recording medium can be reduced, and as a result, this type of conventional example This has an excellent effect in that the recording density of the recording medium can be significantly increased compared to the previous one.

[Brief explanation of drawings]

Figure 1 is a perspective view showing a conventional floating RAD slider, Figure 2
Figures (a) and (cut) are a plan view and a vertical cross-sectional view showing a negative pressure type levitation RAD slider according to an embodiment of the present invention, and Figures 3 and 4 respectively show the negative pressure type levitation RAD slider shown in Figure 2. , is an explanatory diagram showing the floating state in the case where there is no negative pressure generating part and when there is a negative pressure generating part. In the figure, 1...floating surface, 2... tapered surface, 3...
- Mounting surface, 4... Negative pressure generation surface, 5... Positive pressure surface for forming negative pressure, 6... Head, 7... Recording medium, A... Positive pressure, B: Negative pressure, C: Pressing force from the slider support. In each figure, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1/ pθ Figure 2 (a) (b) Figure 3 Figure 4

Claims (1)

[Claims] While the recording medium is stationary, it remains in close contact with this recording therapeutic surface,
As the recording medium travels, the floating surface of the head slider floats above the recording medium surface due to the pressure from the gas flow accompanying the travel of the recording medium, and due to the balance between the pressure and the pressing force from the slider support. In a floating RAD slider having a head at the outflow end of the gas flow, in which a floating state is determined, the floating surface is formed into a convex curved surface, and a negative pressure generating section is provided on the floating surface, and a negative pressure is generated. A negative pressure floating rad slider, characterized in that the center of the negative pressure generated by the generating section is located closer to the outflow end than the support position of the slider support.