JPH0643821U - Magnetic head - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a magnetic head mounted on a hard disk drive, and an object thereof is to reduce the flying height in the vicinity of the magnetic gap to achieve high output. [Structure] The magnetic head 21 is composed of a slider 23 having air bearing surfaces 24 and 25 for floating and a yoke 22 forming a magnetic gap 22b.
Then, the air bearing surfaces 24, 25 are formed narrower along the magnetic gap 22b side in the longitudinal direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head mounted on a hard disk device.

[0002]

[Prior art]

 Generally, a hard disk drive device is known as a storage device such as a computer and a word processor. To briefly explain this hard disk drive device, an actuator in which a magnetic head is attached to a spring arm at the tip of an arm is driven to rotate by a voice coil motor (VCM) and is rotated by a spindle motor. It is located on a predetermined track.

In this case, an air flow is generated in the circumferential direction of the rotating magnetic disk, and the air flow is generated between the magnetic disk and the air bearing surface formed on the magnetic head. The magnetic head floats, and magnetic recording / reproducing processing is performed in this floating state.

Therefore, FIG. 3 shows a perspective view of a conventional magnetic head. The magnetic head 11 of FIG. 3 is called a monolithic type.

In the figure, 12 is a yoke, 13 is a slider for floating the magnetic head from the disk surface, and this slider 13 also functions as the core of the magnetic head. Therefore, both the yoke 12 and the slider 13 are made of a magnetic material (ferrite or the like).

Further, the slider 13 has air bearing surfaces 14 and 15 for floating, and air grooves 16 and 17 having a rectangular cross section for improving stability during floating. There is. Further, 18 and 19 are inclined surfaces for guiding the air flow generated by the rotation of the magnetic disk to the air bearing surfaces 14 and 15 at the time of magnetic recording / reproducing, and 12 a is a center layer which cooperates with the yoke 12 to form a magnetic gap 12 b. It is Le.

[0007]

[Problems to be solved by the device]

 By the way, when the magnetic head 11 floats above the surface of the magnetic disk, the magnetic gap 12b is located at substantially the same height as the air bearing surfaces 14 and 15. Therefore, if the magnetic gap 12b floats higher than the surface of the magnetic disk, there is a problem that the output is lowered during recording and reproduction.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic head that reduces the levitation amount near the magnetic gap to achieve high output.

[0009]

[Means for Solving the Problems]

 The above-described problem is solved by a slider having at least a part formed of a magnetic material, and air bearing surfaces for floating, which are formed at both ends in the longitudinal direction, and a slider formed of the magnetic material. In a magnetic head composed of a yoke that abuts an installation portion to form a magnetic gap, the air bearing surface of the slider is formed narrower along the magnetic gap side in the longitudinal direction, or inclined from a predetermined position. It is solved by forming a surface.

[0010]

[Action]

 As described above, the air bearing surface of the slider is formed to have a narrow width along the magnetic gap side in the longitudinal direction, or an inclined surface is formed from a predetermined position.

Due to the narrow shape or the inclined surface, the levitation force on the rear side (yoke side) of the magnetic head levitated on the magnetic disk is reduced as compared to the front side (opposite side to the yoke). As a result, the flying height near the magnetic gap on the magnetic disk can be reduced, and the output in recording / reproducing can be increased.

[0012]

【Example】

 FIG. 1 shows a block diagram of a first embodiment of the present invention.

FIG. 1 is a perspective view of a magnetic head, which is of a monolithic type. In FIG. 1, the magnetic head 21 is composed of a slider 23 at least a part of which is made of a magnetic material (for example, Mn-Zn ferrite) and a magnetic material (for example, Mn-Zn ferrite). It is constituted by a yoke 22 that is abutted against the material disposition portion and is fixed by a non-magnetic material (for example, glass material) 22c to form a magnetic gap 22b.

On one surface of the slider 23, air bearing surfaces 24 and 25 are formed on both sides with air grooves 26 and 27 formed in parallel with the center rail 22a in the center. A magnetic gap 22b is formed between the center rail 22a and the yoke 22 via a non-magnetic material 22c.

The air bearing surfaces 24 and 25 are formed wide on the opposite side (front side) of the magnetic gap 22b in the longitudinal direction, and are formed narrower from here on the magnetic gap 22b side (rear side).

In addition, inclined surfaces 28 and 29 are formed in front of the air bearing surfaces 24 and 25, respectively, and each corner of the air bearing surfaces 24 and 25 and the air grooves 26 and 27 (center rail 22a) is formed. The portions 24a to 27a are each chamfered to smooth the air flow. That is, the inclined surfaces 28 and 29 guide the flow of air to the air bearing surfaces 24 and 25 to make them float, and the air grooves 26 and 27 having a rectangular cross section at the time of floating improve the floating stability.

The magnetic head 21 is mounted by attaching the back surface of the slider 23 to a spring arm at the tip of the arm of the hard disk drive device with an adhesive material. Then, the inclined surfaces 28, 29 are moved to a predetermined position on the magnetic disk, and the air flows generated in the circumferential direction by the rotation of the magnetic disk are guided to the air bearing surfaces 24, 25. This causes the slider 23 to float. At this time, the air grooves 26 and 27 improve the stability of floating.

By the way, when the slider 23 is levitated, the inclined surfaces 28 and 29 on the front side and the air bearing surfaces 24 and 25 subsequent thereto are narrowed along the magnetic gap 22b side on the rear side. , The levitation force in the front is small, and the levitation force decreases in the backward direction.

As a result, the vicinity of the magnetic gap 22b comes close to the surface of the magnetic disk, and the output in recording / reproducing can be improved.

Although the above embodiments have described the monolithic type magnetic head, the same effect can be obtained even with a composite type magnetic head, and the same effect can be obtained with a thin film magnetic head. Is what you can get.

Next, FIG. 2 shows a block diagram of a second embodiment of the present invention. The same components as those in FIG. 3 are designated by the same reference numerals.

FIG. 2 is a perspective view of a monolithic type magnetic head 31, which is composed of a yoke 12 and a slider 13. On one surface of the slider 13, air bearing surfaces 14 and 15 are formed on both sides from a center rail 12a via air grooves 16 and 17, respectively. A magnetic gap 12b is formed between the center rail 12a and the yoke 12 with a non-magnetic material (for example, glass material) 12c interposed.

The air bearing surfaces 14 and 15 are formed with rectifying grooves 30 and 31 having inclined surfaces 30 a and 31 a rearward from a predetermined position on the magnetic gap 12 b side in the longitudinal direction. Further, front inclined surfaces 18 and 19 are formed at the front ends of the air bearing surfaces 14 and 15 opposite to the magnetic gap 12b.

In the magnetic head 31 as described above, the air flow generated by the magnetic disk being positioned on the magnetic disk and being rotated is rotated by the front inclined surfaces 18, 19 to the air bearing surfaces 14, 19. The air grooves 16 and 17 improve floating stability when floating.

At this time, the slider 13 has a smaller levitation force (flying amount) on the rear side than on the front side due to the rear inclined surfaces 30a and 31a of the flow regulating grooves 30 and 31. As a result, the vicinity of the magnetic gap 12b comes close to the surface of the magnetic disk, and the output in recording / reproducing can be improved.

Although FIG. 2 shows the case where the rectifying grooves 30 and 31 are formed, the levitation amount in the vicinity of the magnetic gap 12b can be reduced even when only the rearward inclined surface is formed. is there.

Further, since the rectifying grooves 30 and 31 increase the number of air grooves near the magnetic gap 12b, the flying height can be stabilized and the flying posture can also be stabilized.

[0028]

[Effect of device]

 As described above, according to the present invention, the air bearing surface is formed narrower along the magnetic gap side in the longitudinal direction, or the inclined surface is formed from a predetermined position to reduce the flying height near the magnetic cap. And high output can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional magnetic head.

[Explanation of symbols]

 21, 31 Magnetic head 22 Yoke 22a Center rail 22b Magnetic gap 22c Non-magnetic material 23 Slider 24, 25 Air bearing surface 26, 27 Air groove 28, 29 Inclined surface 30, 31 Rectifying groove 30a, 30b Rear inclined surface

Claims (2)

[Scope of utility model registration request] 1. A slider, at least a part of which is made of a magnetic material, and air bearing surfaces for floating are formed at both ends in the longitudinal direction, and a slider, which is made of a magnetic material and has the magnetic material. A magnetic head comprising a yoke that abuts an installation portion to form a magnetic gap, wherein the air bearing surface of the slider is formed narrower along the magnetic gap side in the longitudinal direction. head. 2. A slider, at least a part of which is made of a magnetic material, and air bearing surfaces for floating are formed at both ends in the longitudinal direction, and a slider, which is made of a magnetic material and has the magnetic material. In a magnetic head including a yoke that abuts an installation portion to form a magnetic gap, an inclined surface is formed on a predetermined position on the air bearing surface of the slider according to the magnetic gap side in the longitudinal direction. And a magnetic head.