JP3356947B2 - Support structure of 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 a support structure suitable for use in, for example, a magnetic head for recording and reproducing information by 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. 6 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).

A magnetic head 1 is for recording and reproducing information by slidingly contacting a magnetic disk 2 rotating and running in the direction of arrow A. A slider 3 (magnetic head body) and a gimbal spring 4 to which the slider 3 is joined are attached. The magnetic head 1 is supported at a support point 5a of a pivot 5 (support) while 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 in the rotational traveling direction J, and the slider 3 performs recording and reproduction on the magnetic disk 2 using the magnetic gap 6. The slider 3 is swingable about a portion where the center C in the direction of arrow A and the gimbal spring 4 intersect.

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 rotates in the direction of arrow A, the contact resistance of the slider 3 in contact with the magnetic disk 2 on the upstream J side in the rotational direction tends to increase. The slider 3 can swing about a portion where the center C in the direction of arrow A and the gimbal spring 4 intersect.

[0007] Therefore, the slider 3 having the increased contact resistance on the upstream J side in the rotational traveling direction assumes a pinched posture, the upstream J side approaches the magnetic disk 2, and the downstream K side tilts in the direction of rising from the magnetic disk 2. There is.
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 conventional magnetic head support structure as described above 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 due to the high-speed rotation of the magnetic disk 2 flows between the slider 3 and the magnetic disk 2, so that the upstream J side floats and the downstream K side approaches the magnetic disk 2 and There is a problem that the capturing state is canceled. To solve this problem, there is a method of increasing the urging force by the pivot 5. However, if this method is adopted, a motor that damages the magnetic disk 2 or rotates the magnetic disk 2 because the contact pressure is too high. There is a problem that an excessive load is applied to the device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a magnetic head support structure capable of reliably maintaining a state of being captured by a slider even when a magnetic disk rotates at high speed. With the goal.

[0010]

In order to achieve the above object, the present invention employs the following constitution. A support structure for a magnetic head according to the present invention includes a magnetic head body that performs recording and reproduction by slidingly contacting a magnetic recording medium traveling in one direction, and the magnetic head body is joined and swingably supports the magnetic head body. A gimbal spring having a support portion for supporting the gimbal spring and a support for urging the gimbal spring toward the magnetic recording medium at a support point to support the magnetic recording medium. A magnetic gap is formed downstream of the center of the head body in the direction, and the support point is located downstream of the center and the magnetic gap.
Located further upstream and away from the center
And formed by the support of the gimbal spring.
The swing axis is on the downstream side separated from the center, and
It is characterized in that it is formed upstream of the support point of the support .

Therefore, according to the magnetic head support structure of the present invention, in addition to the fact that the magnetic gap is formed downstream from the center of the magnetic head main body even if the upstream side of the magnetic head main body floats, The support point of the support is disposed at a position downstream of the center and separated from the center, and the magnetic head is biased to support the joined gimbal spring toward the magnetic recording medium. The capture state is maintained. Also, the magnetic head of the present invention
According to the above support structure, the support point of the support is
Located on the upstream side, the magnetic recording
The capture state on the recording medium is maintained well,
Light characteristics are obtained. Further, the support of the magnetic head of the present invention is provided.
According to the holding structure, the magnetic head main body on the upstream side of the support portion is
The area increases, and the upstream side rises more. Immediately
That is, the sliding contact with the downstream magnetic recording medium increases.

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

Further, the support structure of the magnetic head of the present invention comprises:
In the above magnetic head support structure, the distance between the swing axis and the center of the magnetic head main body is 0.5 mm.
It is characterized by being within.

Therefore, according to the support structure of the magnetic head of the present invention, the state of being captured by the magnetic head main body on the magnetic recording medium is favorably maintained, so that good read / write characteristics can be obtained.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a magnetic head support structure 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 and running in the direction of arrow A. The magnetic head 1 is roughly composed of a slider 3 and a gimbal spring 4 to which the slider 3 is joined. ing. A magnetic gap 6 is formed at a position separated by a distance S2 (second distance) from the center C in the direction of arrow A on the downstream K side of the sliding contact surface of the slider 3 in the rotational traveling direction. The surface of the slider 3 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 A as an axis.

The connecting portion 10 has a hole 12 having a substantially rectangular shape in a plan view.
Is formed. The joining portion 13 is supported by the connecting portion 10 by the supporting portions 14 and 14 and is swingable about a swing axis 15 in a direction orthogonal to the arrow A direction. The slider 3 is joined to the joint 13, and the center C of the slider 3 is configured to coincide with the swing axis 15 formed by the supports 14.

The pivot 5 slides the magnetic head 1 on 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 located at a position of a distance S1 (first distance) separated from the center C on the downstream K side in the rotational traveling direction, and the position of this distance S1 is where a magnetic gap 6 is formed. Is located on the upstream J side from the current position.

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.

In addition to the fact that the magnetic gap 6 is formed on the downstream K side of the sliding surface, the support point 5a of the pivot 5
However, since the slider 3 is disposed at a position separated from the center C on the downstream K side, the captured state with respect to the magnetic disk 2 is maintained even when the slider 3 is tilted due to the inflow of air. Further, since the support point 5a of the pivot 5 is arranged not on the magnetic gap 6 but on the upstream J side, the magnetic gap 6 is urged to the magnetic disk 2 with play.

When recording / reproducing 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 of the pivot 5 is set to 12 ± 4 (gf), and the pivot 5 is moved from the center C of the slider 3 to the distance S2 from the center C of the slider 3 to the magnetic gap 6.
A test was conducted in which the ratio of the distance S1 to the support point 5a was variously changed. In this test, the value of the distance S2 was 1.346.
FIG. 4 shows read / write characteristics obtained by the magnetic head 1 fixed to mm and changing the value of the distance S1. The numerical value (-) on the horizontal axis in this figure indicates that the support point 5a is located on the upstream J side of the center C, and the other values are located on the downstream K side of the center C.

From the results shown in FIG. 4, distance S1 / distance S2
, Ie, (the distance from the slider center C to the support point 5a of the pivot 5) / (the distance from the slider center C to the magnetic gap 6) is 0.22, the read / write characteristics are almost saturated. It was confirmed that. That is, the distance S1
If the value of / distance S2 is 0.22 or more, a good lead
This confirms that the light characteristics can be obtained.

According to the magnetic head support structure of the present embodiment, good read / write characteristics can be obtained by setting the value of the distance S1 / S2 to 0.22 or more. That is, the urging force of the pivot 5 on the magnetic disk 2 can be reduced. Also, the support point 5a of the pivot 5 is
The magnetic gap 6 has a play with respect to the magnetic disk 2 because the magnetic gap 6 has a play with respect to the magnetic disk 2, and thus the magnetic gap 6 and the magnetic disk 2 are damaged by the bias of the pivot 5. Can be prevented.

Further, the support portions 14, 1 of the gimbal spring 4 are provided.
If the slider 4 is located on the upstream J side of the center C of the slider 3, the area of the slider 3 on the upstream J side of the supporting portions 14 and 14 becomes smaller, and the lift due to the inflowing air decreases accordingly. Since the center C of the slider 3 and the pivot axis formed by the supporting portions 14 and 14 coincide with each other, a sufficient lift on the upstream J side is obtained, and therefore the downstream K
The sliding contact with the magnetic disk 2 on the side is increased.

FIG. 3 is a view showing a second embodiment of the support structure for a magnetic head according to the present invention. In this figure, the same elements as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. The difference between the second embodiment and the first embodiment is the position of the support portions 14 in the gimbal spring 4.

As shown in FIG. 3, the support portions 14, 14 of the gimbal spring 4 are formed at a position C 'which is separated from the center C of the slider 3 by a distance D toward the downstream K side. Other configurations are
This is the same as in the first embodiment.

When recording / reproducing on / from the magnetic disk 2 using the magnetic head 1 and the pivot 5 having the above configuration, the rotational speed of the magnetic disk 2 is set to 2400 ± 120 (rpm),
By setting the biasing force by the pivot 5 to 12 ± 4 (gf) and the ratio of the distance S1 to the distance S2 to 0.37, the distance D from the center C of the slider 3 to the swing axis 15 of the gimbal spring 4 is variously changed. A modified test was performed. FIG. 5 shows the read / write characteristics obtained by the magnetic head 1 in this test. The numerical value (-) shown on the horizontal axis of this figure is
This indicates that the swing axis 15 is located on the upstream J side of the center C, and the other indicates that it is located on the downstream K side of the center C.

From the results shown in FIG. 5, the distance D from the center C of the slider 3 to the swing axis 15 of the gimbal spring 4 is 0 m.
It was confirmed that the read / write characteristics reached a peak in the range from m to 0.5 mm. That is, the swing axis 1
5 is on the downstream K side, and it has been confirmed that good read / write characteristics can be obtained if the distance D between the swing axis 15 and the center C of the slider 3 is within 0.5 mm. .

According to the magnetic head support structure of the present embodiment, the same operation and effect as those of the first embodiment can be obtained, and in addition, the slider 3 on the J side upstream from the support portions 14 and 14 can be obtained. And the lift by the inflowing air increases accordingly. Therefore, the upstream J of the slider 3
As the side floats further, the sliding contact with the magnetic disk 2 on the downstream K side where the magnetic gap 6 is formed further increases. That is, the read / write characteristics can be more favorably obtained.

[0036]

As described above, according to the magnetic head support structure of the present invention , the magnetic gap is formed downstream of the center of the magnetic head main body, and biases the magnetic head toward the magnetic recording medium. The support point of the supporting member for supporting the magnetic head is arranged on the downstream side separated from the center of the magnetic head main body. As a result, even when the magnetic recording medium rotates at a high speed, there is an excellent effect that a highly reliable magnetic head can be obtained without releasing the captured state by the magnetic head main body. Also, the support point of the support is the magnetic gap.
The structure is located on the upstream side
In addition to obtaining write / write characteristics, the magnetic gap
And a long-life magnetic head without damaging the magnetic recording medium.
This has an excellent effect that a head can be obtained. Furthermore, gin
The valve spring support is separated from the center of the magnetic head body
Formed downstream and upstream from the support point of the support
Configuration, so it can be used for magnetic gaps and magnetic recording media.
Sliding contact with the head is higher, and read / write characteristics are better.
It has an excellent effect that the property can be obtained.

[0037]

[0038]

[0039]

Further , according to the magnetic head support structure of the present invention, the distance between the swing axis and the center of the magnetic head body is
It is configured to be within 0.5 mm. Thus, it is intended to achieve an excellent effect that better read-write characteristics.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a front view in which a magnetic head is supported by a support and slidably contacts a magnetic recording medium.

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

FIG. 3 is a view showing a second embodiment of the present invention, and is a plan view of a gimbal spring to which a magnetic head main body is joined.

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

FIG. 5 is a diagram showing read / write characteristics obtained by using the embodiment of the support structure of the magnetic head of the present invention.

FIG. 6 is a front view of a magnetic head according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic head 2 Magnetic disk (magnetic recording medium) 3 Slider (magnetic head main body) 4 Gimbal spring 5 Pivot (support) 5a Support point 6 Magnetic gap 14 Support 15 Shaking axis C Center J Upstream K Downstream S1 Distance (First) Distance) S2 distance (second distance)

Claims (2)

(57) [Claims] 1. A magnetic head main body which performs recording and reproduction by slidingly contacting a magnetic recording medium traveling in one direction, and a support portion to which the magnetic head main body is joined and which supports the magnetic head main body in a swingable manner. A gimbal spring; and a support for biasing and supporting the gimbal spring toward the magnetic recording medium at a support point. The sliding contact surface of the magnetic head main body includes the direction of the magnetic head main body. A magnetic gap is formed downstream of the center of the magnetic gap, and the support point is located downstream of the center and upstream of the magnetic gap, and is separated from the center; A swing axis formed by the supporting member is formed on the downstream side separated from the center and on the upstream side from the supporting point of the support. . 2. The apparatus according to claim 1, wherein said swing axis is within the magnetic head body.
The distance to the heart is less than 0.5mm
The support structure for a magnetic head according to claim 1.