JPS5834025B2 - Core slider of rotating arm type magnetic disk device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slider surface of a core slider having a magnetic head in an apparatus for positioning a magnetic head with respect to a magnetic disk using a rotating arm.

2. Description of the Related Art Magnetic disk drives, in which information is written to/read from a rotating magnetic disk using a magnetic head, are widely used as data entry devices for electronic computer systems.

In general magnetic disk drives, there are those that have a plurality of fixed magnetic heads on one surface of a rotating magnetic disk, and those that have a movable magnetic head.

If a fixed magnetic head is used, each disk surface will have a large number of magnetic heads, which is not suitable for a large capacity storage device.

On the other hand, magnetic disk drives that move the magnetic head in the radial direction of the magnetic disk require a mechanism to move and position the magnetic head, or the mechanism may be common to multiple disks, resulting in lower prices. It is suitable for mass storage devices.

A magnetic disk device using this movable magnetic head generally moves the magnetic head linearly by using a linear motor that performs linear motion, or by converting a rotary motor to linear motion.

However, such a device that linearly moves a magnetic head is bulky, which is disadvantageous for downsizing magnetic disk drives.In recent years, devices that move a magnetic head linearly are disadvantageous for downsizing magnetic disk drives. Accordingly, devices for positioning the magnetic head have been developed.

Furthermore, the magnetic head is floated several micrometers above the magnetic disk by the air flow of the rotating magnetic disk, and information is read or written at a very close distance.

Similar to the conventional magnetic disk using a linear motor,
A floating head is also used in a rotating arm magnetic disk device.

However, in the case of a linear motor, the airflow always enters parallel to the magnetic head or core slider from the front regardless of its stopping position, or in the case of a magnetic head or core slider with a rotating arm, the airflow always enters parallel to the magnetic head or core slider from the front, regardless of its stopping position. If the position changes, the relative direction of the incoming airflow will change.

In other words, the airflow is not necessarily parallel to the longitudinal direction of the core slider, and the stability of levitation is lost.
This causes contact between the slider surface and the magnetic disk, which becomes a cause of head crash.

The object of the invention is therefore to eliminate the above-mentioned drawbacks.

The purpose of this is to have a shaft support that rotatably supports one end of an arm outside the rotating surface of the magnetic disk, and a magnetic head having a slider at the other end of the arm. In a slider of a magnetic disk device in which a magnetic head is positioned by swinging in the center, the shape of the slider surface of the slider facing the magnetic disk surface is tapered at the inflow end side where air flows into the area adjacent to the part. This is achieved by forming the width of the air outlet to be larger than the width of the outflow end side from which air flows out.

Next, the present invention will be explained in detail using the drawings.

FIG. 1 is a schematic diagram of a conventional core slider. In the figure, 1 is a core slider, 2 is a slider surface that is opposite to the magnetic disk surface, 3 is a tapered portion, and 4 is a cap of a magnetic head.

That is, the magnetic head is attached to the core slider, and the slider surface 2 receives buoyancy from the air flowing in from the left side of the core slider 1, that is, from the tapered part, the core slider floats, and the gap 4 becomes magnetic. It will be separated from the disk surface by a distance of several microns.

FIG. 2 is a diagram showing the relationship between the slider surface and airflow when a conventional core slider is used in a rotating arm magnetic disk device.

In the figure, the same symbols as in FIG. 1 indicate the same things as in FIG. 1, and 5 indicates the direction of air flow.

That is, in FIG. 2, the direction of air inflow changes as shown in (1) to (2) depending on whether the core slider 1 is located outside, in the middle, or inside the magnetic disk surface.

When the core slider 1 is located between the outside and inside of the magnetic disk surface, air flows in parallel to the slider surface 2, so that normal buoyancy can be obtained.

However, depending on the stopping position, air may flow in from the direction of ■ or ■, resulting in poor floating stability.
Dust in the air causes a head crash.

Moreover, the ferrite particles near the gear part 4 are peeled off, which becomes a cause of deterioration of electromagnetic characteristics.

The present invention attempts to eliminate these drawbacks.

FIG. 3 shows an embodiment of the invention.

In the figures, the same symbols as in FIG. 2 indicate the same things as in FIG. 2, and 6 is a circular arc.

In the present invention, the rotation angle of the arm is set to ±5 degrees, and the slider surface 2 does not have parallel sides in the longitudinal direction, but has 1
It has an inclination of 0 degrees and further has an arcuate taper part.

Therefore, according to the present invention, the airflow does not hit the slider surface 2 from the side surface, and the buoyancy force exerted on the slider surface 2 can be kept constant regardless of where the core slider 1 is located on the magnetic disk surface. Stability is improved.

It should be noted that when creating a core slider, it may be difficult to process the parallel slider surface as in the past and the inclined slider surface of the present invention, but it is possible to create a core slider with an accurate tilt of 10 degrees, and to create a parallel slider surface. It can be said that the difficulty is the same as creating one.

If the flying height is constant regardless of the stop position of the magnetic head or core slider, not only will there be no head crash, but the distance between the magnetic head and the magnetic disk surface will be stable, and reading or writing will not be possible. This has the effect of making it easier to handle the signals.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a core slider, FIG. 2 is a diagram showing a slider surface of the core slider, and FIG. 3 is an embodiment of the present invention. In the figure, 1 is the core slider, 2 is the slider surface, 4 is the cap of the magnetic head, and 5 is the direction of inflowing air.

Claims (1)

[Claims] 1. It has a shaft support that rotatably supports one end of an arm outside the rotating surface of the magnetic disk, and is equipped with a magnetic head having a slider at the other end of the arm, and the arm is rotated around the shaft support. In a slider of a magnetic disk device that positions a magnetic head by swinging, the shape of the slider surface facing the magnetic disk surface of the slider includes a tapered part and a width of the inflow end side where air flows in adjacent to the slider surface. A core slider of a rotating arm type magnetic disk device, characterized in that the core slider is formed to be larger than the width of the outflow end side from which air flows out.