JP2941757B2 - Arrangement structure of floating magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of a floating magnetic head which performs recording or reproduction while moving relative to a magnetic medium such as a magnetic disk with a small gap.

[0002]

2. Description of the Related Art Conventionally, a floating magnetic head which floats on a rotating magnetic medium such as a magnetic disk by an air flow generated on the surface of the disk and separates from a magnetic recording surface to write and read signals. However, in order to obtain a stable levitation force, this type of magnetic head has been considered to have a spherical or cylindrical surface facing the magnetic medium.

FIG. 3 shows an example. The slider 1 of the magnetic head 10 shown here has a substantially rectangular parallelepiped shape.
The lower surface in FIG. A core insertion groove 3 extending from the medium facing surface 2 to the opposite surface is formed in a rear portion of the slider 1 and shifted from the center in the left-right direction. The magnetic core 4 is inserted into the core insertion groove 3, and the gap surface G of the magnetic core 4 is exposed from the medium facing surface 2.

[0004]

When the magnetic head 10 is arranged with respect to the magnetic medium Z, generally, as shown in FIG. Are arranged so that the lowermost portion S is closer to the leading edge 7 side than the trailing edge 6. Then, the magnetic medium Z is rotated from this state, and the airflow generated on the surface of the magnetic medium Z causes the magnetic head 10 to rotate.
Rises as shown by the two-dot chain line in the figure, the magnetic medium Z
The airflow on the surface may expand after passing through the lowermost end portion S (this portion is also a portion that receives the largest buoyancy), thereby generating a negative pressure portion on the trailing edge 6 side. In particular, at the time of landing on / off, since the initial state of flying is determined by the static attitude of the magnetic head 10, a negative pressure tends to occur near the trailing edge 6, and the magnetic head 10 is attracted by the negative pressure,
Crashes can occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a floating magnetic head capable of realizing stable landing on / off and reducing the risk of crash. Is to do.

[0006]

In order to achieve the above object, the arrangement of a floating type magnetic head according to the present invention comprises a slider provided with a magnetic core, and a medium facing surface of the slider, which is provided with a very small magnetic medium. In a floating magnetic head configured to move a slider and a magnetic medium relative to each other with a gap therebetween, a trailing edge of the slider has a static position in which the slider is not relatively moved with respect to the magnetic medium. In contact with the magnetic medium in a posture,
And, the leading edge of the slider, characterized in that it is spaced apart from the magnetic medium in the static position.

[0007]

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG.
As in the conventional magnetic head 10 shown in FIG. 1, the medium facing surface 2 is formed in a spherical or cylindrical shape. The difference from the conventional magnetic head 10 is that the slider is moved relatively to the magnetic medium. Positioned so that the trailing edge of the slider is at the bottom end when there is no static posture
It is a point that was done . Therefore, the detailed description of the components of the magnetic head 20 is omitted here, and the slider 1 in the static posture is omitted.
Will be described.

As shown in FIG. 1, this magnetic head 20
, In static attitude not the slider 1 is moved relative to the magnetic medium Z, as shown in solid line, the trailing edge 6 of the slider 1 is in contact with the magnetic medium Z, and the leading edge 7 of the slider 1, Separated from magnetic medium Z
Have been. At this time, the pitch angle θ of the slider 1 with respect to the magnetic medium Z in a static posture in which the slider 1 is not relatively moved with respect to the magnetic medium Z is R with the radius of curvature of the medium facing surface 2 of the slider 1 and L with the slider length. When θ =
L / 2R is set.

Here, as shown in FIG. 2, points O, A, B,
When C is defined as follows: O: center of curvature of the medium facing surface 2 A: point where the magnetic medium Z contacts the trailing edge 6 of the slider 1 B: bisecting the magnetic medium facing surface 2 from the point O C: the point where the line OB intersects with the line connecting both ends of the medium facing surface 2. ΔOAB and ΔOCA are similar, so ΔAOB =
∠CAB (pitch angle θ). Where sin θ =
(L / 2R) holds. Further, since R is much larger than L, θ (rad) is expressed as in equation (1). θ = sin ⁻¹ (L / 2R) ≒ L / 2R (1)

As is apparent from the above equation (1) and FIG.
The trailing edge 6 of the slider 1 in a static posture in which the slider 1 is not relatively moved with respect to the magnetic medium Z contacts the magnetic medium Z, the leading edge 7 is separated from the magnetic medium Z, and the magnetic force of the slider 1 is further reduced. When the pitch angle θ with respect to the medium Z is set to L / 2R or more,
The trailing edge 6 of the slider 1 is always at the lowermost end.

As a result, at the initial stage when the magnetic medium Z rotates and the magnetic head 20 flies due to the airflow generated on the surface thereof, the magnetic head 20 flies in a shape close to a static posture, and the lower surface of the magnetic head 20 (particularly, No negative pressure is generated in the vicinity of the trailing edge 6), and the magnetic head 20 floats in a shape close to a static posture even at the end of the floating, and no negative pressure is generated on the lower surface of the magnetic head. Landing on / off can be realized.

[0013]

Effect of the Invention] As described above in detail, according to the arrangement of the floating magnetic head of the present invention, more <br/> state of the initial and terminal stages of the magnetic head flying height in the static posture of the magnetic head because it is determined by the trailing edge in the static posture of the magnetic head is configured such that the lowermost end,
As a result , a stable landing on / off can be realized without generating a negative pressure on the lower surface of the magnetic head, and the danger of crash can be reduced.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram illustrating a static attitude state of a floating magnetic head according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional floating magnetic head.

FIG. 4 is a side view showing a conventional floating magnetic head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slider 2 Medium facing surface 3 Core insertion groove 4 Magnetic core 6 Trailing edge 7 Leading edge 20 Floating magnetic head Z Magnetic medium

Claims (1)

(57) [Claims] 1. A floating magnetic head having a magnetic core provided on a slider and configured to move the slider and the magnetic medium relative to each other with a medium facing surface of the slider facing a magnetic medium at a small interval. In the above, the trailing edge of the slider is brought into contact with the magnetic medium in a static posture in which the slider is not relatively moved with respect to the magnetic medium, and the leading edge of the slider is in the static posture. Of a floating magnetic head characterized by being separated from the
Arrangement structure .