JPH07153217A - Magnetic head device - Google Patents

Abstract

PURPOSE:To perform stable information recording by forming the structure provided with slit-like grooves on the sliding surface of a slider against a disk. CONSTITUTION:The sliding surface 51 is arranged with a base in the planar shape over the whole surface, and the slit-like grooves 61 are formed thereon. When taking notice to the pressure distribution on the relative surface between the sliding surface 51 of the slider 11 and the surface of a disk medium, the pressure generated on this part is a contact pressure and a pneumatic pressure between solid materials, and the amounts of them are inversely proportional to the distance between the relative surfaces, then the pressure is high on the part of the sliding surface 51 and low on the part of the grooves 61. So, the foreign materials such as worn particle, etc., are instantly moved to the grooves 61 from the sliding surface 51. By this constitution, the increase of the distance between the disk medium and magnetic head slider caused by depositions such as the worn particle, etc., and the decrease of a recording magnetic field on the disk as well are suppressed, therefore, the stable information is recorded on the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for recording / reproducing information on / from a disk medium in a magnetic recording / reproducing device such as a magnetic disk and a magneto-optical disk.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are a side view and a plan view of a magnetic head device.

The magnetic head device comprises a slider 1, a load beam 2 for pressing the slider 1 against the surface of the disk medium with a constant load, and a base 3.

The slider 1 is a resin-molded member that holds the magnetic surface of the magnetic head core 4 with respect to the disk medium at a fixed gap and slides in contact with the disk medium.
The sliding surface 5 is a continuous flat surface, a cylindrical surface or a spherical surface over the entire surface.

FIG. 5 is an enlarged perspective view centering on the sliding surface of the conventional slider 1 with respect to the disk (hereinafter referred to as sliding surface 5).

[0006]

When the slider 1 slides in contact with the disk medium, the contact pressure locally increases at the corners of the slider 1 due to the behavior of the sliding surface of the disk medium. As a result, abrasion powder may be generated from the slider 1 or the disk medium and adhere to the sliding surface 5 of the slider 1 or the sliding surface of the disk medium.

Further, since the magnetic head device and the disk medium are not always in a state of being shielded from the outside air, various kinds of dust mixed in the outside air are absorbed by the sliding surface 5 of the slider 1.
Or it may adhere to the sliding surface of the disk medium.

When such an adhering substance enters the sliding surface between the slider 1 and the disk medium, the slider 1 separates from the disk medium, resulting in an increase in the distance between the magnetic head core 4 and the disk medium. , Magnetic head core 4
The recording magnetic field generated from the magnetic recording medium is insufficient in the magnetic layer region in the disk medium, and there is a problem that stable recording cannot be performed.

[0009]

According to the present invention, a plurality of slit-shaped grooves having a constant width are formed parallel to the sliding direction on a sliding surface of a slider which is a continuous surface over the entire surface.

[0010]

According to the above construction, even if foreign matter such as abrasion powder is mixed into the sliding surface of the slider or the disk medium, the foreign matter is instantly removed from the sliding surface into the slit-shaped groove.

[0011]

1 is a perspective view of a slider according to a first embodiment of the present invention. In FIG. 1, the sliding surface 51 is based on a planar shape over the entire surface, and a slit-shaped groove 61 is formed therein.

Now, focusing on the pressure distribution on the relative surface between the sliding surface 51 of the slider 11 and the surface of the disk medium,
The pressure generated in this portion is the contact pressure between solids and the air pressure, and their magnitudes are inversely proportional to the distance between the relative surfaces. That is, in FIG. 1, the pressure at the sliding surface 51 is high and the pressure at the slit-shaped groove 61 is low.

Under such circumstances, all the fluids and solids existing between the relative surfaces change their existing positions from the high pressure portion to the low pressure portion. This is not an exception for foreign matter such as abrasion powder, and the foreign matter instantaneously moves from the sliding surface 51 to the slit-shaped groove 61.

FIG. 2 is a perspective view of a slider according to the second embodiment of the present invention. In FIG. 2, the slit-shaped groove 62
Has a fan-like shape extending from the front to the rear in the sliding direction. With the fan-shaped spread, the foreign matter is more likely to move to the outside of the slider 12 after moving from the sliding surface 52 to the slit-shaped groove 62.

FIG. 3 is a perspective view of a slider according to the third embodiment of the present invention. In FIG. 3, the sliding surface 53 has
A taper portion 7 having a shape extending from the magnetic head core 4 toward the rear in the sliding direction from the rear in the sliding direction to increase the distance to the disk medium is provided. As a result, the same effect as the second embodiment can be obtained.

[0016]

As described above, according to the present invention, the slit-shaped groove is provided on the sliding surface of the slider against the disk,
Since it is possible to suppress an increase in the distance between the disk medium and the magnetic head slider, and eventually a decrease in the recording magnetic field on the disk medium, which can be caused by deposits such as abrasion powder generated on the surface of the disk medium and the sliding surface of the slider. Thus, stable information recording can be performed on the disk medium.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sliding surface of a slider according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a sliding surface of a slider according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a sliding surface of a slider according to a third embodiment of the present invention.

FIG. 4 is a side view showing the configuration of a conventional magnetic head device.

FIG. 5 is a plan view showing the configuration of a conventional magnetic head device.

FIG. 6 is an enlarged perspective view showing a sliding surface of a slider in a conventional example.

[Explanation of symbols]

 4 magnetic head core 7 taper part 11-13 slider 51-53 sliding surface 61-63 slit-shaped groove

Claims (3)

[Claims] 1. A magnetic head core is held in non-contact with a disk-shaped recording medium, and is parallel to the sliding direction on a sliding surface of a slider which slides in contact with the disk medium.
A magnetic head device comprising a plurality of slit-shaped grooves having a constant width. 2. The magnetic head device according to claim 1, wherein the width of the slit-shaped groove widens in a fan shape toward the rear in the sliding direction of the slider. 3. The magnetic head device according to claim 1, wherein the slider sliding surface of the slider is provided with a taper portion that increases in a direction away from the disk medium from a central portion to a rear end.