JPH0636215A - Magnetic head - Google Patents

Abstract

PURPOSE:To provide a magnetic head wherein the directivity of an externally induced noise at the magnetic head is changed to a direction different from the direction of the noise, a noise based on an electromagnetic induction from the outside is hard to pick up and information can be processed always properly with reference to a magnetic recording medium. CONSTITUTION:In a magnetic head 1a wherein a coil 18 is wound on a head core 7 bonded to a slider 2, the coil 18 is arranged in a position where the directivity of its externally induced noise is different from the direction of noise from the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head, and more particularly, to a magnetic head for winding a coil around a head core joined to a slider to perform predetermined magnetic information processing on a magnetic recording medium in an operating state.

[0002]

2. Description of the Related Art Generally, in a magnetic head for recording and reproducing information on a hard disk, which is a magnetic recording medium of a magnetic recording device such as a computer, the magnetic recording medium is rotated by rotating the magnetic recording medium. 2. Description of the Related Art Floating magnetic heads are often used for recording or reproducing on a magnetic recording medium by floating only a minute gap from the medium.

A conventional magnetic head will be described with reference to FIGS.

FIG. 3 is a perspective view showing a general structure of a magnetic head, FIG. 4 is a side view showing a general structure of a conventional magnetic head, FIG. 5 is a bottom view of the same, and FIG. 6 is a support of the magnetic head. FIG. 7 is a perspective view showing the mechanism, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a sectional view showing a main part of the magnetic recording apparatus.

As shown in FIG. 3, a magnetic head 1 has a slider 2 made of ferrite or the like, and an ABS (Air Bear) facing the magnetic recording medium 3 of the slider 2 is provided.
Two rails 5 and 5 are formed so as to project in parallel to the relative movement direction of the magnetic recording medium 3 at both sides of the ring surface) 4. Negative pressure grooves 6 are provided between the rails 5 of the slider 2 for allowing the slider 2 to float above the magnetic recording medium 3. The side end surface of one rail 5 of the slider 2 has A substantially U-shaped head core 7 made of a magnetic material is joined with glass or the like via a gap 8. As shown in FIGS. 4 and 5, a coil 9 is wound around the head core 7 with the thickness direction of the magnetic recording medium 3 as the winding center axis.

The slider 2 of the magnetic head 1 having the above construction is
As shown in FIGS. 6 and 7, the gimbal arm 11 mounted on the drive mechanism unit 10 is attached to the tip end portion of the gimbal 12 via a flexure 13. This gimbal 1
A lead wire 14 for connecting the coil 9 and the energization control section is wired on the upper surface side of 2. Then, by driving the drive mechanism section 10, the magnetic head 1 is moved to the magnetic recording medium 3 via the gimbal 12 and the flexure 13.
The magnetic recording medium 3 is scanned while being driven toward and away from the magnetic recording medium 3.

FIG. 8 shows a plurality of magnetic recording media 3, 3, ... Which can record on both sides of the magnetic head 1 formed as described above.
Magnetic recording device called a general HDD 15 applied to
Is shown. Each magnetic recording medium 3 rotatably mounted inside a hollow frame 18 at a predetermined interval is rotationally driven by a motor 17, and magnetic heads are provided on both sides of each magnetic recording medium 13. 1 is installed so that the head cores 7 face each other.

[0008]

However, in the above-described conventional magnetic head 1, since the winding central axis direction of the coil 9 wound around the head core 7 is the thickness direction of the magnetic recording medium 3, It was weak against electromagnetic induction from the outside in the direction of the winding center axis.

That is, the directivity of the externally induced noise of the magnetic head 1 is in the winding central axis direction of the coil 9, as shown by the broken line arrow and circle in FIG. As shown in FIG. 8, in the magnetic recording apparatus 15, the magnetic head 1 has the magnetic recording medium 3 in which the winding center axis direction of each coil 9 is arranged.
Are arranged so as to coincide with the thickness direction. And
In the magnetic recording device 15, generally, the IC component 16,
High-frequency electromagnetic waves from the motor 17, LCD (not shown), etc. are generated in the thickness direction of the magnetic recording medium 3. Therefore,
There is a problem that the coil 9 of each magnetic head 1 picks up the electromagnetic wave as noise and an error occurs in recording / reproducing information on / from the magnetic recording medium 3.

The present invention overcomes the above-mentioned problems in the prior art, changes the directivity of the externally induced noise of the magnetic head to a direction different from the direction of the noise, and eliminates noise due to electromagnetic induction from the outside. An object of the present invention is to provide a magnetic head which is hard to pick up and which can always properly and properly process information on a magnetic recording medium.

[0011]

In order to achieve the above-mentioned object, a magnetic head of the present invention is a magnetic head in which a coil is wound around a head core joined to a slider, and the coil is directed toward external induction noise. It is characterized in that it is arranged at a position where the characteristics are different from the direction of noise from the outside.

[0012]

According to the magnetic head of the present invention having the above-described structure, since the directivity of the externally induced noise of the coil of the magnetic head is different from the noise direction, the noise generated around the magnetic head is The coil can be made difficult to pick up, the level of noise can be reduced, and proper information processing can always be performed on the magnetic recording medium.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the same parts as those of the related art will be described with the same reference numerals.

FIG. 1 is a side view showing an embodiment of the magnetic head of the present invention, and FIG. 2 is a bottom view of the same.

In the magnetic head 1a of this embodiment, the coil 18 is wound around the head core 7 joined to the slider 2 in a position in which the winding center axis direction is parallel to the surface of the magnetic recording medium 3. . As a result, the directivity of the externally induced noise of the coil 18 is at a position deviated from the noise direction by 90 degrees. Other than that, it is formed similarly to the conventional example. That is, the magnetic head 1 a is attached to the tip of the gimbal 12 of the gimbal arm 11 mounted on the drive mechanism unit 10 by the flexure 1.
It is attached via 3. On the upper surface side of the gimbal 12, a lead wire 14 that connects the coil 18 and the energization control unit
Is wired.

The head core 7 is made of a magnetic material and is substantially U-shaped, and as shown in FIGS. 1 and 2, a gap 8 is formed.
It is joined to the slider 2 with glass or the like via. Further, the gap 8 is formed so as to face the magnetic recording medium 3, and in the present embodiment, the coil 18 is a portion of the head core 7 opposite to the side facing the magnetic recording medium 3, that is, It is wound around the portion of the head core 7 facing the gap 8.

Next, the operation of the present invention having the above-mentioned structure will be described.

In this embodiment, as shown in FIG.
Since the coil 18 of the magnetic head 1a is wound with its winding center axis direction parallel to the surface of the magnetic recording medium 3,
The head core 7 has a directivity of externally induced noise parallel to the surface of the magnetic recording medium 3 as shown by an arrow and a circle with a broken line on the left and right of FIG.

On the other hand, in the magnetic recording device, the IC
The direction of external noise generated by the motor 16, the motor 17, etc. is the thickness direction of the magnetic recording medium 3, and the coil 18 of the magnetic head 1a of this embodiment hardly picks up this external noise.

As a result, information processing such as recording / reproducing on the magnetic recording medium 3 which is performed by controlling the energization of the coil 18 can always be properly performed.

In the above embodiment, the direction of external noise acts in the thickness direction of the magnetic recording medium 3, that is, in the vertical direction of the magnetic head. If different from the above embodiment, the directivity of the external induction noise of the coil may be changed depending on the direction.

Further, the present invention is not limited to the above embodiment, but can be modified as necessary.

[0023]

As described above, since the magnetic head of the present invention is constructed and operates, the directivity of the externally induced noise of the magnetic head is changed to a direction different from the direction of the noise, and electromagnetic induction from the outside is obtained. It is possible to make it difficult to pick up noises based on the information, and to always perform appropriate information processing on the magnetic recording medium.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a magnetic head of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a perspective view showing a general configuration of a magnetic head.

FIG. 4 is a side view showing a general configuration of a magnetic head.

5 is a bottom view of FIG.

FIG. 6 is a perspective view showing a support mechanism of a magnetic head.

FIG. 7 is a side view showing a support mechanism of a magnetic head.

FIG. 8 is a sectional view showing the main part of the magnetic recording device.

[Explanation of symbols]

 1a magnetic head 2 slider 3 magnetic recording medium 7 head core 18 coil

Claims (1)

[Claims] 1. A magnetic head in which a coil is wound around a head core joined to a slider, wherein the coil is arranged at a position where the directivity of externally induced noise is different from the direction of external noise. And a magnetic head.