JPH0574087A - Floating type magnetic head - Google Patents

Abstract

PURPOSE:To maintain a stable floating condition even when a big acceleration is apllied, to improve a stability especially at a starting or a stopping time without causing a contact between a slider and a magnetic recording medium and further to improve a followup ability for the surface vibration of the magnetic recording medium and a projection, etc., by dust and texture at the floating type magnetic head where the centroid of the slider and the position of a pivot are coincided. CONSTITUTION:A recessed part is formed on the flexure attaching surface of the slider, the flexure is attached to the bottom surface of the recessed part and thus, the centroid of the slider and the position of the poivot are made coincident.

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 for recording and reproducing while relatively moving to a magnetic recording medium with a minute gap, and is preferably used for a magnetic field modulating magnetic head of a magneto-optical recording apparatus. It is a thing.

[0002]

2. Description of the Related Art A floating type magnetic head, as shown in FIG.
A slider 16 having a magnetic core 14 around which a coil 12 is wound is attached to the tip of the load beam 10 via a flexure 18. A mount 20 is provided at the other end of the load beam 10 and is attached to the magnetic head device body (not shown).

FIG. 9 shows a partially enlarged view around the flexure 18. The flexure 18 comprises a tongue 20 and an edge 22 around it. The edge portion 22 is fixed to the load beam 10, and the tongue portion 20 is fixed to the slider 16 (magnetic core: not shown). The mounting surface of the slider 16 with the flexure 18 (side surface opposite to the air bearing surface) is referred to as a flexure mounting surface 28.
And Further, the tongue portion 20 is provided with a pivot 24 protruding toward the load beam 10. Pipot 2
4 contacts the tip portion 26 of the load beam 10, and the elastic load from the load beam 10 is transmitted to the slider 16 via the apex of the pivot 24.

[0004]

By the way, FIG. 8 and FIG.
In the shape of the slider 16 of the floating magnetic head shown by, the center of gravity of the slider 16 is inside the slider 16,
As a matter of course, it exists below the flexure mounting surface 28. Therefore, the position of the center of gravity of the slider 16 and the position of the pivot 24 of the flexure 18 do not match.

The discrepancy between the center of gravity of the slider 16 and the position of the pivot 24 is caused when the floating magnetic head is operated.
In particular, when a large acceleration is applied to the slider 16 during seek operation, the moment of inertia acts and the slider 16
There is a possibility that the slider 16 may rotate in the direction of the applied acceleration about the pivot 24 and the slider 16 may come into contact with the magnetic recording medium.

In particular, when used as a magnetic head for magneto-optical recording, the spring pressure for pushing the slider toward the magnetic recording medium side is reduced or the pad width of the slider is widened for the purpose of obtaining a high flying height. I am doing it. Further, a one-rail slider having one pad formed on the slider (see Japanese Patent Application No. 2-188399) has been developed. Although a floating magnetic head equipped with these means can achieve high flying, the air rigidity generated between the slider and the magnetic recording medium is low, and it is not possible to obtain a flying force that exceeds the moment of inertia at high speed seek. The slider has a risk of coming into contact with the magnetic recording medium.

The present invention has been made to solve the above-mentioned problems, and a recess is formed on the flexure mounting surface of the slider, and the flexure is mounted on the bottom surface of the recess of the flexure mounting surface, thereby forming the center of gravity of the slider and the pivot of the flexure. It makes the positions equal.

[0008]

The floating magnetic head of the present invention is a floating magnetic head in which a slider having a magnetic core is attached to the tip of a load beam via a flexure, and a recess is formed on the flexure attachment surface of the slider. Form. Then, by mounting the flexure on the bottom surface of the recess of the flexure mounting surface of the slider, the center of gravity of the slider is located at the same position as the tip portion of the load beam or the pivot point provided on the flexure, or at the opening portion of the recess portion more than the pivot point. It is characterized by being located near.

[0009]

In the floating magnetic head of the present invention, the flexure mounting surface on which the flexure is mounted is formed with a recess, and the flexure is mounted in the recess, whereby the flexor pivot can be positioned at the center of gravity of the slider. By positioning the pivot at the center of gravity of the slider, the flying stability of the slider can be improved.

[0010]

【Example】

(Embodiment 1) The floating magnetic head of Embodiment 1 is shown in FIGS.
Will be explained. In both figures, components such as a magnetic core that are not characteristic of this embodiment are omitted. Further, in FIG. 2, the load beam is also omitted for clarity of explanation. The floating magnetic head of the first embodiment has an air bearing surface 42.
The pad formed on is a one-rail slider.

Similar to the conventional example, in the floating magnetic head of the first embodiment, the slider 30 is attached to the tip of the load beam 11 via the flexure 32. The characteristic feature of this floating magnetic head is that a recess 34 is formed in the flexure mounting surface 44 to which the flexure is mounted.
That is, by forming a groove along the longitudinal direction at the center of the slider 30 on the flexure mounting surface 44 of the slider 30, the recess 3 is formed.
4 and the convex portions 36, 36 are formed. Further, the flexure 3 attached to the tip of the load beam 11
2 is attached to the bottom of the recess 34. The depth of the concave portion 34 needs to be such that the position of the pivot 38 of the flexure 32 becomes the center of gravity of the slider 30. Also,
It is essential that the width of the recess 34 is the same as or slightly wider than that of the flexure 32.

In the floating magnetic head having this structure,
Since the protrusions 36, 36 are formed on the slider 30, the center of gravity 40 of the slider 30 is attached to the pivot 38 of the flexure 32.
Can be located. Therefore, in this floating magnetic head in which the position of the center of gravity 40 of the slider 30 and the position of the pivot 38 are the same, a stable flying state can be obtained even at the time of high speed seek, so that the slider 30 does not come into contact with the magnetic recording medium. .. Especially CSS (Contact Start)
Even with a floating magnetic head that employs stop), it is possible to improve stability when starting or stopping. Furthermore, the surface wobbling of the magnetic recording medium and the followability to protrusions due to dust or texture are improved.

The above effect can be obtained even if the center of gravity 40 of the slider 30 is located closer to the opening of the recess 34 than the pivot 32. That is, the depth of the concave portion 34 may be such that the pivot 38 is located at a position slightly deeper than the center of gravity of the slider 30.

Although the pivot is formed on the flexure in this embodiment, the pivot can be formed on the tip of the load beam instead of on the flexure, and the pivot is formed on the load beam. Even in the case of the head, the same effect can be obtained by forming the concave portion on the slider and attaching the flexure to the bottom surface thereof.

(Embodiment 2) A floating magnetic head of Embodiment 2 is shown in FIG. In this floating magnetic head, the recesses are formed on the flexure attachment surface 52 by providing the projections 50, 50 instead of using the method of forming the grooves as in the first embodiment. Formed.
That is, the ridge 5 is provided on the flexure mounting surface 52 of the slider 46 except for the portion (recess 48) where the flexure 32 is mounted.
Nos. 0 and 50 were attached by adhesion, and the position of the pivot 38 of the flexure 32 and the center of gravity 41 of the slider 46 were aligned. The material of the ridges 50, 50 is not limited, but a non-magnetic material having a high specific gravity is preferable. For example, it may be lead. If the material has a high specific gravity, the ridges 50, 50 can have a desired size and shape depending on the specific gravity, and the flying posture can be easily controlled by the shape of the slider 46.

Also in the floating magnetic head having this structure,
Since the protrusions 50, 50 are formed on the slider 46, the center of gravity 48 of the slider 46 is attached to the pivot 38 of the flexure 32.
Can be located. Therefore, in this floating magnetic head in which the position of the center of gravity 41 of the slider 46 and the position of the pivot 38 are the same, a stable flying state can be obtained even at the time of high-speed seek, so that the slider 46 does not come into contact with the magnetic recording medium. ..

(Third Embodiment) FIG. 4 shows a floating magnetic head according to a third embodiment. In this floating magnetic head, the first embodiment is used to form the recess 60 in the flexure mounting surface 62.
The recess 60 was formed by employing both the method of forming the groove by processing as described above and the method of providing the convex stripe as in Example 2. That is, the flexure mounting surface 62 of the slider 54
To form a groove along the longitudinal direction at the center of the slider 54,
Further, the ridges 56, 56 are provided on the flexure mounting surface 62 other than the groove.
Was attached by adhesion, and the position of the pivot 38 of the flexure 32 and the center of gravity 58 of the slider 54 were aligned. Therefore, the depth of the groove and the ridges 56, 5 are formed so that the center of gravity 58 of the slider 54, on which the ridges 56, 56 are installed by forming the groove, coincides with the position of the pivot 38 of the flexure 32.
It is necessary to prepare 6 heights. Ridges 56, 56
The material is not limited, but a high specific gravity material is preferable. If the material has a high specific gravity, the ridges 56,
56 can be of any desired size and shape, and the slider 5
The flying posture can be easily controlled by the shape of No. 4.

Either of the processing of the groove and the formation of the ridges 56, 56 may be performed first, and even if the ridges 56, 56 are formed in the place where the groove is not formed after forming the groove, Alternatively, the high specific gravity material may be integrally attached to the flexure mounting surface 62, and then the groove may be processed to form both the convex stripes 56, 56 and the concave portion 60.

Also in the floating magnetic head having this structure,
Since the protrusions 56, 56 are formed on the slider 54, the center of gravity 58 of the slider 54 is attached to the pivot 38 of the flexure 32.
Can be located. Therefore, in this floating magnetic head in which the position of the center of gravity 58 of the slider 54 and the position of the pivot 38 are the same, a stable flying state can be obtained even at the time of high speed seek, so that the slider 54 does not come into contact with the magnetic recording medium. ..

(Embodiment 4) FIG. 5 shows a floating magnetic head of Embodiment 4. This floating magnetic head is a two-rail slider in which two flying rails 66, 66 are formed on the air bearing surface.

In the floating magnetic head of the fourth embodiment, this
The recess 68 is formed by forming a groove along the length direction at the center of the flexure mounting surface 70 of the rail slider 64. The convex portion 7 is formed by forming the concave portion 68.
2, 72 were formed. The flexure 32 was attached to the bottom surface of the formed recess 68.

Also in the floating magnetic head of this embodiment, the convex portions 72, 72 and the concave portion 68 are formed on the flexure mounting surface 70.
It is possible to make the position of the center of gravity 74 of the entire slider 64 and the position of the pivot 38 of the flexure 32 coincide with each other. Therefore, in this floating magnetic head in which the position of the center of gravity 74 of the slider 64 and the position of the pivot 38 are the same, a stable flying state can be obtained even at the time of high speed seek, so that the slider 64 does not come into contact with the magnetic recording medium. ..

Further, in order to position the pivot 38 at the center of gravity of the slider 64, not only a groove may be formed, but also a method of providing a convex strip as in the second and third embodiments may be used.

(Fifth Embodiment) FIG. 6 shows a floating magnetic head according to a fifth embodiment. This floating magnetic head is a three-rail slider having three flying rails 86, 86, 88 on the air bearing surface.

In the floating magnetic head of the fifth embodiment, this
The recess 84 is formed by forming a groove along the length direction at the center of the flexure mounting surface 80 of the rail slider 76. Then, by forming the concave portion 84, the convex portion 7
Formed 8,78. The flexure 32 was attached to the bottom surface of the formed recess 84.

Also in the floating magnetic head of this embodiment, the projections 78, 78 and the recesses 84 are formed on the flexure mounting surface 80.
The center of gravity 82 of the entire slider 76 and the position of the pivot 38 of the flexure 32 can be aligned by forming the. Therefore, in this floating magnetic head in which the position of the center of gravity 84 of the slider 76 and the position of the pivot 38 are the same, a stable flying state can be obtained even at the time of high-speed seek, so that the slider 76 does not come into contact with the magnetic recording medium. ..

Further, in order to position the pivot 38 at the center of gravity of the slider 76, not only a groove may be formed but also a method of providing a ridge as in the second and third embodiments may be used.

(Embodiment 6) FIG. 7 shows a floating magnetic head of Embodiment 6. In this floating magnetic head, a flexure 94 is attached to the tip of a load beam 90 via an adapter 92. A slider 96 is attached to the flexure 94, and the slider 96 floats while maintaining a minute space with the magnetic recording medium 100 when the floating magnetic head is operated.

In the floating magnetic head of this embodiment, too,
A convex portion 102 and a concave portion are provided on the flexure mounting surface of the slider 96, and the flexure 94 is attached to the bottom surface of the concave portion. By forming the convex portion 102 and the concave portion on the flexure mounting surface, the center of gravity of the entire slider 96 and the position of the pivot 98 of the flexure 94 can be matched. Therefore, the center of gravity of the slider 96 and the pivot 9
Since the floating magnetic head having the same position 8 can obtain a stable flying state even at the time of high speed seek, the slider 96 and the magnetic recording medium 100 do not come into contact with each other.

In order to position the pivot 98 at the center of gravity of the slider 96, not only the groove is formed as in the first embodiment, but also the protruding line is formed as in the second and third embodiments. I don't care.

[0031]

In the floating magnetic head of the present embodiment, the flexure mounting surface of the slider is provided with the concave portion, and the flexure is attached to the bottom surface of the concave portion. Therefore, the flexure pivot is positioned at the center of gravity of the slider. You can In this floating magnetic head in which the center of gravity of the slider and the position of the pivot are the same, a stable flying state can be obtained even during a high-speed seek in which a large acceleration is applied, so that the slider does not come into contact with the magnetic recording medium. ..

In particular, even a floating magnetic head adopting CSS (Contact Start stop) can improve the stability at the time of starting or stopping. Furthermore, the surface wobbling of the magnetic recording medium and the followability to protrusions due to dust or texture are improved.

[Brief description of drawings]

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

FIG. 2 is a front view of a slider and a flexure portion of the floating magnetic head of the first embodiment.

FIG. 3 is a front view of a slider and a flexure portion of a floating magnetic head according to a second embodiment.

FIG. 4 is a front view of a slider and a flexure portion of a floating magnetic head according to a third embodiment.

FIG. 5 is a front view of a slider and a flexure portion of a floating magnetic head according to a fourth embodiment.

FIG. 6 is a front view of a slider and a flexure portion of a floating magnetic head according to a fifth embodiment.

7A and 7B show a floating magnetic head of Example 6, FIG. 7A being a plan view and FIG. 7B being a side view.

FIG. 8 is a perspective view of a conventional floating magnetic head.

FIG. 9 is an exploded perspective view around a flexure of a conventional floating magnetic head.

[Explanation of symbols]

 10, 11 load beam 14 magnetic core 16, 30, 46, 54, 64, 76 slider 18, 32, 94 flexure 24, 38, 98 pipot 28, 44, 52, 70, 80 flexure mounting surface 34, 48, 60, 68,84 concave part 36,72,78,102 convex part 40,41,58,74,82 center of gravity 42 air bearing surface 50,56 convex stripe

Claims (1)

[Claims] 1. A floating magnetic head having a slider having a magnetic core mounted on the tip of a load beam via a flexure, wherein a recess is formed on a flexure mounting surface of the slider, and the flexure is mounted on a bottom surface of the recess on the flexure mounting surface. Is mounted, and the center of gravity of the slider is located at a position equal to the tip of the load beam or a pivot provided on the flexure, or closer to the opening of the recess than the pivot. ..