JP2798826B2 - 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 a floating magnetic head which performs recording and reproduction while moving relative to a magnetic recording medium with a small gap, and is particularly suitably used for a magnetic head for modulating a magnetic field of a magneto-optical recording apparatus. About what is being done.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional structure for supporting a floating magnetic head. In the structure shown in FIG. 6, a slider 16 is attached to the tip of the load beam 10 by a flexure 18.
A magnetic core 14 around which the coil 12 is wound is provided at the tip of the slider 16. A mount 20 is provided at the other end of the load beam 10,
The load beam 10 is attached to the magnetic head device main body (not shown) by the mount 20.

As shown in FIG. 7, the flexure 18 comprises a tongue 20 and an edge 22 around the tongue. This is the tongue 20 protruding shaped pin bot 24 projecting to the load beam 10 side. The edge 22 is fixed to the load beam 10 by spot welding, and the tongue 20 is adhered to the slider 16. The upper surface of the slider 16 shown in FIG. 7 is hereinafter referred to as a flexure mounting surface 28. Tip 26 of the pin bot 24 load beam 10 which is provided on the tongue 20
Is in contact with This elastic load from the load beam 10 is transmitted to the slider 16 attached to the bottom of the flexure 18 through the vertices of the pin bot 24.

[0006] In the floating magnetic head shown in FIGS. 6 and 7, the center of gravity of the slider 16 is located inside the slider 16 on the leading side 3 and below the flexure mounting surface 28. Therefore, the slider 1
The center of gravity of the slider 16 in the 6 to the height direction and the pivot 2
4 did not match the position.

[0005] Thus, the position of the center of gravity of the slider 16, the position of the peak bot 24 by not match, inconvenience described below have arisen. During operation of the floating magnetic head, if a large acceleration is applied to the slider 16 particularly during a seek operation, a moment of inertia is generated in the magnetic head. Then, there was a possibility that the rotational force is produced to the slider 16 around the pin bot 24.

[0006]

In order to solve the above-mentioned problems, the present inventors have proposed a floating magnetic head shown in FIGS. 8 and 9 in Japanese Patent Application No. Hei 3-133081.

This floating type magnetic head has a load beam 1
The slider 16 is attached to the leading end of the “0” via a flexure 18. FIG. 9 shows the slider 16. The concave portion 34 is formed on the center side of the slider 16, so that the wall portions 33 are formed on both sides of the concave portion 34. The flexure 18 is attached to the bottom surface of the formed recess 34. The flexure 18 is provided on the bottom of the recess 34.
By attaching, and where the vertical position and the pin bot 24 of the center of gravity of the slider 16 is located, the slider 16
In the height direction (indicated by an arrow A in FIG. 8).

[0008] Since the position of the center of gravity and peak bot 24 of this In the floating magnetic head slider 16 is substantially equal in the height direction of the slider 16, stable flying state even during the high speed seek consuming large acceleration Could be obtained.

Therefore, the present inventors further developed the slider 16.
To match the a position where to centroid and the peak bot 24 completely, not only the height direction of the slider 16, and consider the horizontal direction match.

[0010] However, simply by attaching the flexure 18 so as to position the pin bot 24 on the leading side 3 that the center of gravity of the slider 16 is present, since the slider 16 is not positioned horizontally with respect to the magnetic recording medium, a magnetic The flying performance of the head may be adversely affected.

[0011] The present invention has been made in view of the above circumstances, the height direction relative to the slider 16, of course, can be made to coincide with the place to position the center of gravity of the slider 16 of the pin bot also in the horizontal direction It is an object of the present invention to provide a floating magnetic head as described above.

[0012]

According to a first aspect of the present invention, there is provided a floating type magnetic head comprising a slider having a magnetic core attached to a leading end of a load beam via a flexure. A concave portion is formed on the side, and a wall portion is formed on both sides of the concave portion ;
The above problem was solved by forming a groove for adjusting the weight balance in the portion.

According to a second aspect of the present invention, there is provided a floating type magnetic head comprising a slider having a magnetic core attached to a leading end of a load beam via a flexure, wherein a concave portion is formed in the center of the flexure mounting surface of the slider. ,
The wall is formed on both sides of the concave portion, and the problem is solved by projecting a wing for weight balance adjustment on the wall .

[0014] In a floating type magnetic head according to claim 3, in a floating type magnetic head composed by attaching a slider having a magnetic core through a flexure at the tip of the load beam, before
The slider is formed by joining two members, one of which is
Has solved the above problem by using a member having a lower specific gravity than the other member . The floating magnetic head according to claim 4.
Attach a flexure to the bottom of the recess
Solved the above problem.

[0015]

In the floating magnetic head according to the present invention, the recess is formed in the center of the flexure mounting surface of the slider, and the groove for adjusting the weight balance is formed in the wall, so that the depth of the recess is adjusted. it and can match the center of gravity and pin bot position of the slider by adjusting the location of forming the groove.

In the floating magnetic head according to the present invention, a concave portion is formed in the center of the flexure mounting surface of the slider, and a wing portion for adjusting the weight balance is projected from the wall portion, so that the depth of the concave portion is reduced. adjusted and by adjusting the forming position and size of the wings, it is possible to match the center of gravity of the slider and the pin ball <br/> Tsu preparative position.

According to the third aspect of the present invention, in the floating magnetic head ,
The rider has two parts joined together, one of which is
Since it is made of a member having a lower specific gravity than the other member,
By changing the size or material of the two members,
Adjust the position of the center of gravity of the slider
The center of gravity of the slider and the pivot position can be matched by adjusting in the left-right direction . The floating magnetic head according to claim 4.
Now, a flexure is attached to the bottom of the recess
Therefore, adjust the center of gravity of the slider and the pivot
The slider can be stably levitated.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The floating magnetic head of the present invention will be described below in detail with reference to the drawings. The same components as those of the conventional example are denoted by the same reference numerals, and the description will be simplified.

(Embodiment 1) FIG. 1 is a perspective view showing a slider 16 and a part of a flexure 18 of a floating type magnetic head of this embodiment, and FIG. 2 is a view showing only the slider 16. A recess 34 is formed at the center of the slider 16 from the leading side 3 to the trailing side 4, and a groove 1 for weight balance adjustment is formed on the leading side 3 of the wall 33 provided on both sides of the recess 34. ing. Also,
A magnetic core 6 is formed on a part of the wall 33 on the trailing side 4 from the groove 1.

In the floating magnetic head of this embodiment, the bottom surface of the concave portion 34 formed in the slider 16 becomes the flexure mounting surface 28. The depth of the recess 34 is
It is necessary that the position of bot 24 is deep to become the center of gravity of the slider 16.

When the groove 1 is provided in the wall 33 on the leading side 3 of the slider 16 as in the above structure, the slider 16
Moves to the trailing side 4. When the groove 1 is provided in this manner, the center of gravity of the slider 16 can be moved to a desired position by adjusting the formation position, width, and depth of the groove 1. As a result, the position of the center of gravity of the slider 16 and the position (pivot position) 5 where the pivot 24 is placed 5
Can be matched in the horizontal direction of the slider 16.

In the floating magnetic head having the above configuration,
Recess 34 in the slider 16, since the further the groove portion 1 is formed in the wall portion 33, the center of gravity of the slider 16 and the pin bot position 5 can be completely matched.

[0023] Thus, in the center of gravity and the peak bot position 5 are equal this floating magnetic head of the slider 16, it is possible to obtain a stable flying state even during the high speed seek, the slider 16 and the magnetic recording medium No contact. In particular, even a floating magnetic head employing CSS (Contact Start Stop) can improve the stability at the time of starting or stopping. Further, the follow-up property to the surface runout of the magnetic recording medium and the protrusions due to dust and texture is improved.

In the floating magnetic head of this embodiment, the wall 3
3 is formed with a groove 1 for adjusting the weight balance. By changing the position and size of the groove 1, the center of gravity of the slider 16 can be shifted with respect to the horizontal direction of the slider 16.
It can be moved to a desired position. In addition, by adjusting the depth of the concave portion 34 formed in the slider 16, the center of gravity of the slider 16 can be moved to a desired position in the height direction of the slider 16.

The floating magnetic head of the present embodiment, therefore, since the center of gravity and pin bot position 5 of the slider 16 can be matched, the height direction of the magnetic recording medium even when the slider 16 is that acceleration is applied Does not change, and a stable flying posture can be maintained even during a seek operation or when passing through a protrusion, so that reliability and stability are dramatically improved.

(Embodiment 2) FIG. 3 is a perspective view showing a slider 16 and a part of a flexure 18 of a floating magnetic head of this embodiment, and FIG.

The slider 16 has a wing portion 11 for adjusting the weight balance so as to be connected to the trailing side 4 of the wall portion 33 provided by forming the concave portion 34 in the slider 16. A magnetic core 6 is formed on the leading side 3 of the wing 11.

When the wings 11 are connected to the wall 33 on the trailing side 4 of the slider 16, the center of gravity of the slider 16 moves to the leading side 4. By providing the wings 11 in this manner, the center of gravity of the slider 16 can be moved to a desired position in the horizontal direction of the slider 16. In addition, by adjusting the depth of the concave portion 34 formed in the slider 16, the center of gravity of the slider 16 can be moved to a desired position in the height direction of the slider 16.

The floating magnetic head of the present embodiment is similar to that of the first embodiment.
The same operation and effect as described above can be obtained.

[0030] (Embodiment 3) FIG. 5 is a perspective view showing a portion of the slider 16 and the flexure 18 of the floating magnetic head of the present embodiment. The slider 16 of this floating type magnetic head is
The two members on the loading side are joined.
A pair of wall portions 33 is formed on the member 16b on the leading side.
The trailing member 16a has a wall 3
3 and a magnetic core portion 6 are formed. This
When these two members 16a and 16b are joined,
The recess 34 reaching the trailing side 4 from the loading side 3
It is formed. Pivot position 5 where pivot 24 is placed
Is slightly tray from the joint of the two members 16a and 16b.
It is on the ring side 4.

The trailing member 16a is made of a high specific gravity material.
It is formed by materials. Thus, the trailing side
When the member 16a is formed of a material having a high specific gravity, the slider 16
Moves to the trailing side 4. Also, Riede
The member 16b on the trailing side is the member 16a on the trailing side.
It is formed of a low specific gravity material having a lower specific gravity. This
, The leading side member 16b is made of a low specific gravity material.
When formed, the center of gravity of the slider 16 is
Go to Examples of the high specific gravity material include zirconia
Can be exemplified. Further, as the low specific gravity material, aluminum
And the like.

The trailing member 16a and / or
Leading of specific gravity lower than trailing member 16a
By changing the size of the side member 16b,
Desirable center of gravity of slider 16 with respect to horizontal direction of slider 16
Can be moved to the position. In addition, high specific gravity materials and
And / or by changing the material of the low specific gravity material
Also, the horizontal direction of the slider 16
The center of gravity can be moved to a desired position. In addition,
Adjusting the depth of the recess 34 formed in the rider 16
With respect to the height direction of the slider 16,
6 can be moved to a desired position. this
Thus, the size of the member 16a and / or the member 16b,
Changing these materials and adjusting the depth of the concave portion 34
Moves the center of gravity of the slider 16
The center of gravity of the slider in the front-back or left-right direction of the slider.
The pivot position 5 and the slider 1
6 can be matched with the center of gravity.

As described above, the floating magnetic head of this embodiment is
In the third embodiment, the same effect as in the first embodiment can be obtained.

[0034] In the floating magnetic head shown in Example 1 and Example 2, the weight balance adjusting groove 1, weight balance adjusting wings 11 has been exemplified a case in which a rectangular, pin ball Any shape may be used as long as the cut position 5 matches the center of gravity of the slider 16.

[0035]

According to the first aspect of the present invention, there is provided a floating magnetic head comprising a slider having a magnetic core attached to a leading end of a load beam via a flexure.
Since forming a groove for weight balance adjustment on the wall portion of the slider, by changing the location of forming the groove, the center of gravity and the peak bot position and a horizontal direction of the slider of the slider, be matched it can. Furthermore, since it is recess formed in the slider, it is possible to slide the center of gravity and the peak bot position match in the vertical direction of the slider by adjusting the depth of the recess.
Therefore a floating type magnetic head according to claim 1, the center of gravity of the slider and the pin bot position coincides completely, the without changes in the height direction of the magnetic recording medium even when the acceleration is applied to the slider In addition, a stable flying posture can be maintained even during a seek operation, a passage through a projection, and the like, and a magnetic head with significantly improved reliability and stability can be obtained.

The floating magnetic head according to claim 2, since the projecting wings for adjusting the weight balance in the wall portion of the slider, by varying the size of the wings, the slider of the centroid and peak volume The cut position can be matched with the slider in the horizontal direction. Furthermore, since it is recess formed in the slider in the vertical direction the slider of the center of gravity and the peak bot position of the slider by adjusting the depth of the recess, can be matched. Therefore a floating type magnetic head according to claim 2, since the center of gravity of the slider and the pin ball Tsu <br/> preparative position coincides completely, the height direction of the magnetic recording medium even when the acceleration is applied to the slider change This makes it possible to maintain a stable flying posture even during a seek operation or a passage through a protrusion, and to obtain a magnetic head with significantly improved reliability and stability.

In the floating magnetic head of the third aspect, the sliding magnetic head
Two members are joined together, and one member is
Since it is made of a member having a lower specific gravity than the member of
Changing the size of the members or the material of these members
The center of gravity position of the slider
Can be adjusted in the left-right direction so that the center of gravity of the slider coincides with the pivot position in the horizontal direction of the slider. Also, a recess is formed in the slider, and the recess is formed.
When the depth of the slider is adjusted, the center of gravity of the slider
By adjusting in the direction, the center of gravity of the slider and the pivot position can be matched in the vertical direction of the slider. Accordingly, the floating type magnetic head according to claim 3, Sly
The position of the center of gravity of the slider is adjusted, and the center of gravity of the slider and the pivot position are completely coincident. A stable floating attitude can be maintained even when passing through a projection, and a magnetic head with significantly improved reliability and stability can be obtained. In addition, claim 4
In the floating magnetic head, a flexure is provided on the bottom of the recess.
Since it is attached, the center of gravity of the slider and the pivot position
To make the slider fly stably.
it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a slider of a floating magnetic head according to a first embodiment.

FIG. 2A is a view of the slider of the floating magnetic head according to the first embodiment as viewed from above; FIG. 2B is a view of the slider of the floating magnetic head according to the first embodiment as viewed from the side; FIG. 3C is a diagram of the slider of the floating magnetic head according to the first embodiment as viewed from the trailing side.

FIG. 3 is a perspective view illustrating a slider of a floating magnetic head according to a second embodiment.

4A is a diagram of the slider of the floating magnetic head according to the second embodiment as viewed from above, FIG. 4B is a diagram of the slider of the floating magnetic head according to the second embodiment as viewed from the side, FIG. (C) is a diagram of the slider of the floating magnetic head according to the second embodiment as viewed from the trailing side.

FIG. 5 is a perspective view showing a slider of a floating magnetic head according to a third embodiment.

FIG. 6 is a perspective view showing a conventional magnetic head.

FIG. 7 is an enlarged view for explaining a tip portion of a conventional magnetic head.

FIG. 8 is a perspective view showing a conventional magnetic head.

FIG. 9 is a view of a conventional magnetic head slider viewed from a trailing side.

[Explanation of symbols]

1 weight balance adjusting groove 3 leading side 4 trailing side 10 the load beam 11 weight balance adjustment wings 18 flexure 24 pin bot 28 flexure mounting surface 34 recess

Claims (4)

(57) [Claims] 1. A floating magnetic head in which a slider having a magnetic core is attached to a tip of a load beam via a flexure, a recess is formed at a center side of a flexure mounting surface of the slider, and wall portions are provided on both sides of the recess. And a groove for adjusting a weight balance is formed in a wall portion of the floating magnetic head. 2. A floating magnetic head in which a slider having a magnetic core is attached to the tip of a load beam via a flexure, wherein a recess is formed at the center of the flexure mounting surface of the slider, and wall portions are provided on both sides of the recess. And a wing portion for weight balance adjustment protruding from a wall portion . 3. A floating magnetic head in which a slider having a magnetic core is attached to a tip of a load beam via a flexure, wherein the slider is formed by joining two members.
The floating magnetic head is characterized in that the material is made of a member having a lower specific gravity than the other member . 4. A flexure is attached to a bottom surface of the recess.
The method according to any one of claims 1 to 3, wherein
The floating magnetic head as described.