JPS5819742Y2 - Head slider for magnetic disk devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slider (hereinafter also simply referred to as a "slider") for a magnetic disk device, and particularly to a slider for mounting a thin film magnetic head element.

The slider described above is generally constructed so that the surface facing the magnetic disk is floated by airflow generated as the magnetic disk rotates, thereby maintaining a constant distance between the head element and the magnetic disk. There is.

A conventional slider generally has a tapered magnetic disk facing surface, and the entire facing surface constitutes an air bearing surface.

However, in this case, the flying blade is too large to achieve the low flying state required for increasing the density of the magnetic disk.

As a solution to this problem, a twin-barrel slider is used in which floating surfaces are formed only on the left and right sides to reduce the number of floating blades.

However, in this slider, since the head element needs to be on the same level as the left and right air bearing surfaces, the head element must be provided so as to protrude into the central groove.

Therefore, the head element acts as a dam against the airflow flowing through the central groove, and the airflow is suddenly disturbed near the head element.

Therefore, the flying height of the head element becomes unstable, and reading information from or writing information to the magnetic disk becomes unstable.

Further, with this structure, dust tends to adhere around the head element, which not only impairs the function of the head element but also damages the head element and the magnetic disk.

Therefore, an object of the present invention is to provide an excellent slider that can realize a low flying state and does not have the above-mentioned drawbacks.

The slider according to the present invention is independent of the left and right air bearing surfaces and has a shorter length than the left and right air bearing surfaces in a central concave groove between the left and right air bearing surfaces of a twin-body slider that has air bearing surfaces on the left and right sides with respect to the rotational direction of the magnetic disk. In this way, a central air bearing surface with a gentle slope toward the air inflow side is formed on the slider center line, and a thin film magnetic head element is placed at the end of the central air bearing surface on the air outflow side at the same level as the central air bearing surface. It has a structure in which it is attached with

Hereinafter, the present invention will be described in detail based on embodiments with reference to the accompanying drawings.

An embodiment of the slider according to the present invention is shown in a perspective view in FIG. 1, and its center cross section is shown together with a magnetic disk in FIG.

The slider 1 has air bearing surfaces 4 on both left and right sides with respect to the rotational direction of the magnetic disk 2, that is, the flow direction A of the airflow 3.

These air bearing surfaces 4 are tapered at the end on the air inflow side.

Inside the central concave groove 5 of the housing is a floating surface 6.

This air bearing surface 6 is formed on the slider centerline and at a position closer to the air outflow side.

The air bearing surface 6 is independent from the left and right air bearing surfaces 4, and is shorter in length than the left and right air bearing surfaces 4 and has an almost rectangular shape, with a gentle taper from the air outflow side of the casing toward the air flow side. It is attached.

A thin film magnetic head element (hereinafter simply referred to as a "head element") 7 is attached at the end of the air outflow side of the central air bearing surface 6 at the same level as the air bearing surface 6.

When the slider 1 described above is used, a portion of the airflow 3 flows along the central air bearing surface 6 as shown in FIG.

Therefore, the airflow 3 is not suddenly disturbed by the head element 7, and a stable flying state can be obtained.

Note that since the central floating surface 6 is independent from the left and right floating surfaces 4 and has a short length, the number of floating blades does not increase much.

If an increase in the number of floating blades is still a problem, it is possible to reduce the number of floating blades by forming a large number of small recesses or the like in the central floating surface 6.

Next, some other embodiments of the present invention are shown in FIGS. 3 to 5.
It is shown in the figure.

The sliders 1a, 1b, and 1c shown in these figures are almost the same as the example shown in FIG. 1 in terms of function, and the only difference is the shape of the air bearing surface and the like.

That is, slider 1a in FIG. 3 is the same as slider 1 in FIG.
On the other hand, the center air bearing surface 6a is provided at a position closer to the air inflow side, and the taper of this air bearing surface 6a is made the same as that of the left and right air bearing surfaces 4.

In addition, the slider 1b in FIG. 4 is different from the slider 1a in FIG. 3 in that the left, right and center floating surfaces 4b and 6b are cylindrical crowns (arc surfaces).

Furthermore, compared to the slider 1 of FIG. 1, the slider 1c of FIG. 5 has a central air bearing surface 6c of a semicircular shape as shown in the figure, with a tapered circumference.

As is clear from the above explanation, the slider of the present invention minimizes the increase in flying edges by providing a central flying surface with a relatively small area on the twin-barrel slider, and also minimizes airflow turbulence caused by the head element. This allows for an extremely stable low-flying state to be achieved.

Furthermore, there is no fear that dust may adhere to the head element and the central groove, thereby preventing functional deterioration of the head element and damage to the head element, magnetic disk, etc.

As described above, the slider according to the present invention has many advantages, has a very simple structure, and can be said to be highly practical.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the slider according to the present invention, FIG. 2 is a cross-sectional view of the slider along the line D-■ in FIG. 1 taken together with the magnetic disk, and FIGS. 2A and 2B are perspective views of second, third and fourth embodiments of a slider according to the present invention, respectively; In the figure, 1. 1a, 1b, 1c...
Slider, 2...Magnetic disk, 3...
・Air flow, 4, 4b... Left and right air bearing surfaces, 5...
...Central groove, 6, 6a. 6c...Central air bearing surface, 7...Thin film magnetic head element.

Claims (1)

[Scope of utility model registration request] In a twin-hulled slider having air bearing surfaces on the left and right sides with respect to the rotational direction of the magnetic disk, in a central concave groove between the left and right air bearing surfaces, a groove that is independent from the left and right air bearing surfaces and shorter in length than the left and right air bearing surfaces is provided. In addition, a central air bearing surface with a gentle slope toward the air inflow side is formed on the slider center line, and a thin film magnetic head element is installed at the end of the central air bearing surface on the air outflow side at the same level as the central air bearing surface. Rad slider for magnetic disk devices, which is characterized by the fact that it is attached.