JPH10198917A - Magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent read-write characteristics even when a magnetic disk rotates at a high speed, in a magnetic head. SOLUTION: This magnetic head records and reproduces in slidable contact with a magnetic recording medium 2 running in one direction B, and is also provided with a magnetic head main body 3 with a magnetic gap 6 formed on the sliding contact face. The magnetic gap 6 is positioned at a downstream side K from the center in the direction B of the magnetic head main body 3, and if the length of the magnetic head main body 3 in the direction B is expressed by L, the length from an end part 15 of the magnetic head main body 3 on a upstream side J in the direction B up to the magnetic gap 6 is expressed by A, and the thickness of the magnetic head main body 3 is expressed by H, (A/L)×(1/H)>=1.0 is satisfied as relational expression.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for recording and reproducing information by, for example, slidingly contacting a magnetic recording medium.

[0002]

2. Description of the Related Art In general, a magnetic recording / reproducing apparatus is used for recording / reproducing information of a computer or the like. This magnetic recording / reproducing apparatus records / reproduces information on / from a magnetic recording medium by a magnetic head. It is. FIG. 5 shows an example of a conventional magnetic head. In this figure, reference numeral 1 denotes a magnetic head, and reference numeral 2 denotes a magnetic disk (magnetic recording medium).

The magnetic head 1 performs recording and reproduction of information by slidingly contacting a magnetic disk 2 rotating in the direction of arrow B. The magnetic head 1 includes a slider 3 (magnetic head body) and a gimbal spring 4 to which the slider 3 is joined. The magnetic head 1 is supported at a support point 5 a of the pivot 5 in a state of being slightly biased toward the magnetic disk 2.

A magnetic gap 6 is formed on the sliding contact surface of the slider 3 on the upstream side J in the rotational direction.
Record / reproduce data on / from the magnetic disk 2 using the magnetic gap 6. Also, the slider 3 has the arrow B
The center of the direction C and the gimbal spring 4 intersect with each other so that the gimbal spring 4 can swing freely about an axis.

The operation of the magnetic head 1 having the above configuration will be described below. The gimbal spring 4 is urged toward the magnetic disk 2 by a pivot 5 and is supported. Since the slider 3 is joined to the gimbal spring 4, the slider 3 is also urged toward the magnetic disk 2 by the urging of the pivot 5. Thus, the slider 3 can record and reproduce information using the magnetic gap 6 while being in sliding contact with the magnetic disk 2.

At this time, since the magnetic disk 2 is rotating in the direction of the arrow B, the contact resistance on the upstream J side in the rotation direction tends to increase on the surface where the slider 3 contacts the magnetic disk 2. The slider 3 can swing about a portion where the center C in the direction of arrow B and the gimbal spring 4 intersect.

Therefore, the slider 3 in which the contact resistance on the upstream J side in the rotational direction is increased becomes a pinched posture, the upstream J side approaches the magnetic disk 2, and the downstream K side inclines in the direction of rising from the magnetic disk 2. is there. In this state, in order for the slider 3 to maintain the capture state with respect to the magnetic disk 2, the support point 5a of the magnetic gap 6 and the pivot 5 is configured so as to be located near the center C of the slider 3 or slightly upstream J side. Have been.

[0008]

However, the above-described conventional magnetic head has the following problems. In order to meet the demand for higher speed for recording and reproducing information, it is necessary to increase the rotation speed of the magnetic disk 2. At this time, the flow of air generated with the high-speed rotation of the magnetic disk 2 is generated by the slider 3 and the magnetic disk 2.
In this case, the upstream J side floats and the downstream K side approaches the magnetic disk 2 to release the captured state, and a problem occurs in that good read / write characteristics cannot be obtained. For this defect, pivot 5
However, when this method is employed, the contact pressure is too high and the magnetic disk 2
There is a problem that an excessive load is applied to the motor that damages the magnetic disk 2 or rotates the magnetic disk 2.

The present invention has been made in view of the above points, and it is possible to reliably maintain the state of capture with the slider even when the magnetic disk rotates at high speed, and obtain good read / write characteristics. It is intended to provide a magnetic head that can be used.

[0010]

In order to achieve the above object, the present invention employs the following constitution. The magnetic head of the present invention is configured to include a magnetic head main body having a magnetic gap formed on a sliding contact surface while performing recording and reproduction while sliding on a magnetic recording medium traveling in one direction. The magnetic head body is located downstream from the center with respect to the direction, the length of the magnetic head body in the direction is L, and the length from the upstream end of the magnetic head body in the direction to the magnetic gap is L. A, and when the thickness of the magnetic head body is H, (A / L) ×
It is characterized by satisfying a relational expression of (1 / H) ≧ 1.0.

Therefore, according to the magnetic head of the present invention, since the distance between the center of gravity of the magnetic head main body and the sliding contact surface is reduced,
Even when air flows in, there is little change in the attitude of the magnetic head body. Further, since the magnetic gap is located on the downstream side separated from the center of the magnetic head main body, the captured state with respect to the magnetic recording medium is maintained even if the upstream side of the magnetic head main body floats.

Next, a magnetic head according to the present invention is characterized in that in the above magnetic head, the value of (A / L) × (1 / H) is 1.2 or more.

Therefore, according to the magnetic head of the present invention, the captured state on the magnetic recording medium can be maintained more favorably.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic head according to the present invention will be described below with reference to FIGS. In these figures, the same components as those in FIG. 5 shown as a conventional example are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 1, reference numeral 1 denotes a magnetic head, and reference numeral 2 denotes a magnetic disk.

The magnetic head 1 performs recording and reproduction of information by slidingly contacting a magnetic disk 2 rotating in the direction of arrow B. The magnetic head 1 is roughly composed of a slider 3 and a gimbal spring 4 to which the slider 3 is joined. I have. Slider 3
Indicates that the thickness in the direction from the slider 3 toward the magnetic disk 2 is H, and the length in the direction of arrow B is L. At a position at a distance A from the upstream J-side end 15 in the B direction,
A magnetic gap 6 is formed. Also, slider 3
The surface opposite to the sliding contact surface is joined to the gimbal spring 4.

As shown in FIG. 2, the gimbal spring 4 is made of an elastic material having a substantially rectangular shape in a plan view. The main body 7 of the gimbal spring 4 has projections 9, 9 formed with a recess 8 having a substantially rectangular shape in a plan view, and a connecting portion 10 is formed in the recess 8. This connecting portion 10
It is supported by the protruding portions 9, 9 by the supporting portions 11, 11 and is swingable about the direction of arrow B as an axis.

The connecting portion 10 is formed with a substantially rectangular hole 12 in a plan view.
Are formed. The joint portion 13 is supported by the connecting portion 10 by the support portions 14 and 14 and is swingable about an axis perpendicular to the arrow B direction. The slider 3 is joined to the joint 13,
The center C of the slider 3 is configured to match the swing axis formed by the supports 14.

The pivot 5 makes the magnetic head 1 slidably contact the magnetic disk 2 by lightly biasing and supporting the gimbal spring 4 in the direction of the magnetic disk 2. Also,
The support point 5a of the pivot 5 is arranged at a position separated from the center C on the downstream K side in the rotation direction.

The operation of the magnetic head 1 having the above configuration will be described below. The gimbal spring 4 is urged toward the magnetic disk 2 by a pivot 5 and is supported. Since the slider 3 is joined to the gimbal spring 4, the slider 3 is also urged toward the magnetic disk 2 by the urging of the pivot 5. At this time, since the magnetic disk 2 is rotating at a high speed, the flow of air generated by the rotation flows between the slider 3 and the magnetic disk 2 to lift the upstream J side of the slider 3 to cause the downstream K Side approaches the magnetic disk 2 side.

Since the magnetic gap 6 is formed on the downstream K side of the sliding contact surface, the slider 3 is moved by the inflow of the air.
The state of capture with respect to the magnetic disk 2 is maintained even when is tilted.

When recording / reproducing data on / from the magnetic disk 2 using the magnetic head 1 and the pivot 5 having the above-described structure,
The rotational speed of the magnetic disk 2 is set to 2400 ± 120 (rp.
m), the biasing force by the pivot 5 is set to 12 ± 4 (gf), the thickness H of the slider 3, the length L in the direction of the arrow B,
A test was conducted in which the length A from the upstream J-side end 15 in the direction of the arrow B to the magnetic gap 6 was variously changed. FIG. 3 shows dimensions in which L, A, and H are variously changed, and a value of (A / L) × (1 / H) calculated from these values. And
FIG. 4 shows read / write characteristics obtained by the magnetic head 1 having (A / L) × (1 / H) and these values in this test.

From the results shown in FIG. 4, (A / L) × (1/1)
It was confirmed that the read / write characteristics were sharply improved around the point where the value of (H) exceeded 0.6, and good read / write characteristics were obtained when the value was 1.0 or more. In addition, the above (A
It was confirmed that a stable saturated state was obtained when the value of (/ L) × (1 / H) was 1.2 or more.

According to the magnetic head of this embodiment, (A
By setting the value of (/ L) × (1 / H) to 1.0 or more, good read / write characteristics can be obtained. In addition, this (A
By setting the value of (/ L) × (1 / H) to 1.2 or more, highly stable read / write characteristics can be obtained. The urging force of the pivot 5 can be reduced by maintaining the above set value. That is, damage to the magnetic gap 6 and the magnetic disk 2 due to the urging of the pivot 5 can be prevented.

[0024]

As described above, according to the magnetic head of the first aspect, the magnetic gap is located downstream from the center of the magnetic head main body, and the total length L, thickness H, and upstream of the magnetic head main body are determined. The relationship of the length A from the side end to the magnetic gap satisfies (A / L) × (1 / H) ≧ 1.0. As a result, even when the magnetic recording medium rotates at a high speed, an excellent effect that a magnetic head having good read / write characteristics can be obtained without releasing the capture state by the magnetic head body.

According to the magnetic head of the second aspect, (A
/ L) × (1 / H) is set to 1.2 or more. As a result, in addition to obtaining highly stable read / write characteristics, there is an excellent effect that a long-life magnetic head can be obtained without damaging the magnetic gap and the magnetic recording medium.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a front view in which a magnetic head slides on a magnetic recording medium.

FIG. 2 is a view showing an embodiment of the present invention, and is a plan view in which a magnetic head main body is joined to a gimbal spring.

FIG. 3 is a diagram illustrating various dimensional values of a magnetic head main body in an embodiment of the magnetic head according to the present invention.

FIG. 4 is a view showing read / write characteristics obtained by using an embodiment of the magnetic head of the present invention.

FIG. 5 is a front view of a magnetic head according to the related art.

[Explanation of symbols]

 Reference Signs List 1 magnetic head 2 magnetic disk (magnetic recording medium) 3 slider (magnetic head main body) 6 magnetic gap 15 end C center J upstream K downstream

Claims (2)

[Claims] 1. A magnetic head main body having a magnetic gap formed on a sliding contact surface while performing recording / reproduction by slidingly contacting a magnetic recording medium traveling in one direction. It is located downstream from the center of the main body in the direction, and the length of the magnetic head main body in the direction is L, and the length from the upstream end of the magnetic head main body in the direction to the magnetic gap is A. A magnetic head characterized by satisfying a relational expression of (A / L) × (1 / H) ≧ 1.0, where H is the thickness of the magnetic head main body. 2. The magnetic head according to claim 1, wherein the value of (A / L) × (1 / H) is 1.2 or more.