JPH05303857A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To prevent the deformation of a flexure caused by the contraction of adhesive agent and the projection of the end surface of the medium opposite surface side of a core slider at a floating type magnetic head assembling body where a floating type magnetic head and the fluxure are stuck with the adhesive agent. CONSTITUTION:A U-shaped slider attaching member 14 is attached to a flexure 3 welded to the tip part of a load arm 1 for holding a core slider 7 and the both side surfaces of the core slider 7 are attached to this slider attaching member 14 by an adhesive agent 8. Since the projection of the end surface of the medium opposite surface side of the core slider is prevented by the generation of a bending moment only on both side surfaces of the core slider by the contraction of the adhesive agent, the floating type magnetic head having excellent electromagnetic transformation characteristic is provided without giving any damages to a magnetic recording medium and a magnetic gap section even when a CSS is carried out for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head supporting device for a floating magnetic head used in a fixed magnetic disk device used for recording / reproducing data in a computer or the like.

[0002]

2. Description of the Related Art In recent years, fixed magnetic disk devices have tended to be smaller and thinner, and accordingly, floating magnetic heads have also been required to be smaller and thinner.

A conventional magnetic head supporting device will be described below. FIG. 7 is a side view of a main part of a conventional magnetic head supporting device. In FIG. 7, 1 is a load arm made of a non-magnetic metal material, 2 is a claw formed by cutting and raising a part of the load arm 1, 3 is a flexure welded to the tip of the load arm 1, and flexure 3 is It is made of a non-magnetic metal plate and is provided with a cutout so that a tongue-shaped portion 3a is movably formed in the central portion. 4 is a floating magnetic head, and the floating magnetic head 4 includes a C-shaped core 5a and an I-shaped core 5
The core chip 5 is formed of a magnetic circuit that abuts with b to form a magnetic gap 6, and a non-magnetic material in which the core chip 5 is embedded and bonded so that the magnetic gap 6 faces the bottom side. It consists of a core slider 7. Reference numeral 8 denotes an adhesive agent that joins the floating magnetic head 4 to the tongue-shaped portion 3a. The adhesive agent 8 is a thermosetting epoxy resin or the like. Reference numeral 9 is a read / write coil wire wound around the I-shaped core 5b, and 10 is an insulating tube for covering the coil wire 9 fixed to the claw 2. Reference numeral 11 is a magnetic recording medium.

The operation of the floating magnetic head 4 constructed as described above will be described below. Magnetic recording medium 1
The load that balances the lift force and the balance force applied to the floating magnetic head 4 by the air flow 12 generated by the rotation of the load arm 1
Is applied to the floating magnetic head 4 via the flexure 3,
The floating posture of the floating magnetic head 4 is held by the flexure 3 attached to the load arm 1. As the magnetic gap 6 of the floating magnetic head 4 is closer to the magnetic recording medium 11, a higher recording density and a larger output can be obtained. Is arranged as. And
The minimum spacing position of the air bearing surface of the core slider 7 is determined by the shape of the air bearing surface of the core slider 7, the load, the position of the load acting point, and the like.

[0005]

However, as shown in FIG. 7, in the above-mentioned conventional structure, the bending moment M is caused by the shrinkage of the adhesive 8 made of thermosetting epoxy resin or the like.
Occurs, and the flexure 3 is deformed, and the deformation of the flexure 3 pushes the core slider 7 of the floating magnetic head 4 with a load F, and the core slider 5 facing the magnetic recording medium on the side where the core chip 5 is inserted. The end surface on the surface side is projected from the air bearing surface by d (for example, about 100 nm). In this state, contact the floating magnetic head for a long time.
When start / stop (hereinafter abbreviated as CSS) is performed, the surface of the magnetic recording medium is damaged and the recorded information is destroyed, and the magnetic gap located on the air bearing surface side of the core chip is also damaged, resulting in electromagnetic conversion characteristics of the magnetic head. Had a problem of deteriorating.

The present invention solves the above-mentioned conventional problems, and prevents the flexure from being deformed by a bending moment due to the contraction of an adhesive or the like to form a protrusion on the core slider, and allows CSS to be used for a long time. Another object of the present invention is to provide a magnetic head supporting device excellent in electromagnetic conversion characteristics without damaging a magnetic recording medium or a magnetic gap portion.

[0007]

In order to achieve this object, the magnetic head supporting device of the present invention has a flexure that is welded to the tip of a load arm, and only the side surfaces of the core slider of the magnetic head are bonded with an adhesive material. It has a configuration in which a slider mounting member for holding is provided.

[0008]

With this configuration, the adhesive surface for holding the core slider becomes the side surface of the core slider, and the flexure is deformed by the bending moment due to the contraction of the adhesive and the end surface of the core slider on the side facing the magnetic recording medium is changed. It is possible to prevent it from protruding.

[0009]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a magnetic head support device according to a first embodiment of the present invention, and FIG. 2 is an enlarged perspective view of a main part of the magnetic head support device according to the first embodiment. FIG. 3 is a side view of a main part of the magnetic head support device according to the first embodiment.

In FIGS. 1 to 3, 1 is a load arm, 2 is a claw, 3 is a flexure, 4 is a floating magnetic head, 5 is a core chip, 6 is a magnetic gap, 7 is a core slider, 8 is an adhesive, and 9 is an adhesive. Is a coil wire for read / write, 1
Reference numeral 0 is an insulating tube, 11 is a magnetic recording medium, and 12 is an air flow. Since these are the same as in the conventional example, the same reference numerals are given and description thereof is omitted. Reference numeral 13 denotes a mount, which mounts the load arm 1 and the floating magnetic head 4 to the magnetic recording medium 11
The load arm 1 is welded to a portion to which an actuator (not shown) for moving to the designated recording / reproducing position is coupled with a screw or caulking. Reference numeral 14 denotes a U-shaped slider mounting member. The U-shaped slider mounting member 14 is welded to the tongue portion 3a of the flexure 3, and the width of the U-shaped space portion is the core slider 7.
It is made equal to or narrower than the width of. The material of the U-shaped slider mounting member 14 is made of, for example, flexible non-magnetic stainless steel. Also, a flexible non-magnetic metal or another flexible material may be used.

The function of the magnetic head supporting device of the present invention constructed as described above will be described with reference to FIG. Since the core slider 7 is adhesively fixed to the two side surfaces of the U-shaped slider mounting member 14 via the adhesive 8 such as thermosetting epoxy resin, the bending moment M due to the contraction of the adhesive 8 is It acts on the side surface of the slider 7, and it is possible to prevent the flexure from being deformed by the bending moment M and the end surface of the core slider 7 facing the magnetic recording medium from protruding.

As described above, according to the present embodiment, by providing the U-shaped slider mounting member 14 for holding the core slider 7 on the flexure 3 welded to the tip of the load arm 1, the core is provided. The adhesive surface for holding the slider 7 becomes the side surface of the core slider 7, and the flexure 3 is caused by the bending moment M due to the contraction of the adhesive 8.
Can be prevented from protruding and the end surface of the core slider 7 on the side facing the magnetic recording medium protruding. Therefore, it is possible to provide the floating magnetic head 4 which is excellent in electromagnetic conversion characteristics and does not damage the magnetic recording medium 11 or the magnetic gap 6 even if CSS is applied for a long time. In addition, the bonding surface between the core slider 7 and the slider mounting member 14 is 2
The adhesive strength is also increased in places, and the core slider 7 and the slider mounting member 14 are less likely to come off.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is an enlarged perspective view of a main part of a magnetic head supporting device according to the second embodiment of the present invention. FIG. 5 is the second
FIG. 7 is a front view of the main part of the magnetic head support device in the example of FIG. In FIGS. 4 and 5, a flexure 3 has the same structure as that of FIG. The difference from the configuration of FIG. 1 is that a recess 16 is formed in the U-shaped slider mounting member 15. The recesses 16 are provided on both side surfaces of the U-shape that face each other so as to have a convex portion on the outer side and a concave portion on the inner side.

The function of the U-shaped slider mounting member 15 of the support spring constructed as described above will be described below. The core slider is a U-shaped slider mounting member 1 through an adhesive such as a thermosetting epoxy resin.
5 is adhered and fixed on the two side surfaces of the slider 5. At this time, excess adhesive accumulates in the recess 16 and has a U-shaped slider mounting member 15
It does not stick out from the side of. As described in the first embodiment, it is possible to prevent the flexure 3 from being deformed by the bending moment caused by the contraction of the adhesive and the end face of the core slider facing the magnetic recording medium from protruding.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 6 is an enlarged perspective view of a main part of a magnetic head supporting device according to the third embodiment of the present invention. In FIG. 6, reference numeral 3 is a flexure having the same structure as that of FIG. The difference from the configuration of FIG. 1 is that a protrusion 18 is attached to a U-shaped slider mounting member 17. The protrusion 18 is
It is provided on both opposite sides of the U-shape so that the inside is a protrusion. Although the number of the protrusions 18 is four on one side in this embodiment, it may be two or more on one side.

The function of the U-shaped slider mounting member 17 of the support spring constructed as described above will be described below. Since the core slider is fixed by the protrusions 18 of the U-shaped slider mounting member 17, there is no deviation or play between the core slider and the U-shaped slider mounting member 17 until the adhesive is solidified. The mounting position is stable. As described in the first embodiment, it is possible to prevent the flexure 3 from being deformed by the bending moment caused by the contraction of the adhesive and the end face of the core slider facing the magnetic recording medium from protruding.

Although the slider mounting member 14 is U-shaped in the first embodiment, the slider mounting member 1
4 may be U-shaped, pentagonal, or the like. Moreover, it can be easily understood that the respective effects can be expected even in the combination of the second and third embodiments.

[0021]

As described above, according to the present invention, the flexure, which is welded to the tip of the load arm of the magnetic head supporting device, is provided with the slider mounting member for bonding and holding only both side surfaces of the core slider of the magnetic head with the adhesive material. As a result, the adhesive surface for holding the core slider becomes the side surface of the core slider, and the flexure is deformed by the bending moment due to the contraction of the adhesive and the end surface of the core slider on the side facing the magnetic recording medium protrudes. Therefore, it is possible to realize a floating magnetic head having excellent electromagnetic conversion characteristics, which does not damage the magnetic recording medium or the magnetic gap portion even if CSS is applied for a long time.
In addition, since the bonding surface between the core slider and the slider mounting member is at two places, the bonding force is increased and the removal of the core slider and the slider mounting member is reduced. Further, by providing the recesses or protrusions on the inner surface of the slider mounting member, it is possible to prevent the adhesive from protruding and to stabilize the mounting position of the core slider.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic head support device according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the magnetic head support device according to the first embodiment.

FIG. 3 is a side view of a main part of the magnetic head support device according to the first embodiment.

FIG. 4 is an enlarged perspective view of a main part of a magnetic head supporting device according to a second embodiment of the invention.

FIG. 5 is a front view of a main part of a magnetic head support device according to a second embodiment.

FIG. 6 is an enlarged perspective view of a main part of a magnetic head support device according to a third embodiment of the invention.

FIG. 7 is a side view of a main part of a conventional floating type magnetic head supporting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 load arm 2 claw 3 flexure 3a tongue 4 floating type magnetic head 5 core chip 5a C type core 5b I type core 6 magnetic gap 7 core slider 8 adhesive 9 coil winding 10 insulating tube 11 magnetic recording medium 12 air flow 13 Mount 14 Slider mounting member 15 Slider mounting member 16 Recess 17 Slider mounting member 18 Protrusion

Claims (3)

[Claims] 1. A flexure is provided on a load arm, and a slider mounting member for holding a magnetic head is provided on the flexure, and the slider mounting member holds only both side surfaces of a slider of the magnetic head by an adhesive material. Characteristic magnetic head support device. 2. The magnetic head supporting device according to claim 1, wherein the slider mounting member has recesses on both side surfaces of the magnetic head facing the slider. 3. The magnetic head supporting device according to claim 1, wherein protrusions are provided on both side surfaces of the slider mounting member facing the slider of the magnetic head.