JPH05144207A - Mounting structure for magnetic head slider and magnetic head slider using same - Google Patents

Abstract

PURPOSE:To eliminate loss of an operation of a gimbal spring as a suspension by preventing bridging between a central tongue on the side of the gimbals spring and a peripheral mount of the spring with excess adhesive in the case of adhering the tongue of the spring to a magnetic head slider. CONSTITUTION:When a magnetic head slider 2A is adhered fixedly to a gimbal spring 6 formed of a central tongue 14 by a cutout hole 13, a groove 17 corresponding to the hole is formed at least partly at the slider. Excess adhesive is introduced into the groove thereby to prevent bridging between the tongue 14 and a peripheral mount 11 of the gimbal spring with the excess adhesive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head slider mounting structure which can be used for mounting a floating magnetic head of a hard disk device used as an external storage device of a computer and a magnetic head slider used for the same.

[0002]

2. Description of the Related Art FIGS. 4 to 6 show a conventional magnetic head slider mounting structure. However, FIG. 4 is a view in which the magnetic head support arm is lifted above the magnetic head slider for the sake of clarity. In these figures, 1 is a flying magnetic head for a hard disk drive, and 2 is a magnetic head slider made of a non-magnetic material such as ceramics. Here, the floating magnetic head is one in which a head piece 3 having a head gap facing a hard disk is fixedly integrated in a groove of a slider 2 made of a non-magnetic material, and a winding 4 is provided.

There is also a flying magnetic head in which a head gap is formed by joining a core piece to a slider made of a magnetic material such as ferrite.

Such a magnetic head 1 includes a load spring 5 which applies a predetermined load toward the hard disk surface to the slider 2, and a gimbal spring 6 which is fixed to the tip of the load spring 5 and elastically supports the slider 2. Is supported by a magnetic head support arm 7 having a.

The load spring 5 and the gimbal spring 6
Are each made of a thin elastic metal plate. The load spring 5 has a slender substantially triangular shape with a tapered tip, and a guide 8 for guiding a lead wire 4A drawn from a winding wire 4 provided on the head piece 3 of the magnetic head 1 toward the main body of the hard disk drive at the tip. Are formed by bending, and ribs 9 are formed at both ends by substantially L-shaped bending for strength reinforcement. The rear end of the load spring 5 is
It is a mounting portion 10 to the main body of the hard disk device.
The gimbal spring 6 has a substantially rectangular shape with a semi-circular rear end, and a substantially U-shaped cutout hole 13 is formed to form a central tongue portion (a portion that acts as a suspension) 14 from the vicinity of the tip toward the center. At the center of the central tongue portion 14, a hemispherical convex pivot 15 is formed upward. Positioning holes 16 having the same diameter are formed in a portion near the tip of the load spring 5 and a portion near the rear end of the gimbal spring 6, respectively, and the gimbal spring 6 and the positioning holes 16 are aligned with each other. The magnetic head support arm 7 is configured by welding the peripheral mounting portion 11 on the rear end side of the central tongue portion 14 to integrate the load spring 5 and the gimbal spring 6. It should be noted that a step 12 is formed on the connecting portion between the central tongue portion 14 of the gimbal spring 6 and the peripheral mounting portion 11 by pressing or the like, so that the peripheral mounting portion 1
The central tongue 14 is slightly lower than 1.

The floating magnetic head 1 is attached to the magnetic head supporting arm 7 by adhering and fixing the upper surface of the slider 2 to the lower surface of the central tongue portion 14 of the gimbal spring 6 at the tip of the supporting arm 7. At this time, the head piece 3 is arranged so as to be located on the tip side, and the upward pivot 15 at the center of the central tongue portion 14 is arranged at the center of the upper surface of the slider 2 and is bonded using the adhesive 33 as shown in FIG. .. As shown in FIG. 6, it is preferable that the adhesive 33 extends not only to the lower surface portion of the central tongue portion 14 but also to the side surface in the thickness direction of the peripheral edge portion in terms of improving the adhesive strength.

When the magnetic head 1 and the magnetic head support arm 7 are integrated, the upper end of the convex portion of the pivot 15 is in contact with the lower surface of the tip of the load spring 5, and the central tongue portion 14 of the gimbal spring 6 is in contact. Is not directly fixed to the load spring 5, the upper surface of the magnetic head 1 is pressed downward at one point of the pivot 15 of the central tongue 14 to which the magnetic head 1 is adhered. With the above configuration, a predetermined load can be applied to the magnetic head 1.

[0008]

By the way, when the lower surface of the central tongue portion 14 of the gimbal spring 6 and the upper surface of the slider of the magnetic head 1 are fixed by the adhesive agent 33 as in the above-mentioned conventional example, the adhesive agent 33 is applied to the central tongue portion 14. Not only the bottom part of
In order to improve the adhesive strength, it is desirable that the adhesive is spread over the side surface in the thickness direction of the peripheral edge portion, but when the amount of the adhesive 33 is larger than the required amount, as shown by a virtual line F in FIG. The adhesive 33A extends beyond the width of the cutout hole 13 beyond the adhesive area where the lower surface of the central tongue portion 14 contacts the lower surface of the central tongue portion 14.
There is a risk that it penetrates to 1 and bridges the central tongue portion 14 and the peripheral mounting portion 11. In this way, if the central tongue portion 14 and the peripheral mounting portion 11 are attached to each other with an excess adhesive,
The degree of freedom between the central tongue portion 14 and the peripheral mounting portion 11 is limited, and the function of the gimbal spring 6 as a suspension is reduced, resulting in a defective product and a reduction in yield.

In view of the above points, the present invention bridges the central tongue portion of the gimbal spring and the peripheral mounting portion with an extra adhesive when bonding the central tongue portion on the gimbal spring side to the magnetic head slider. The present invention provides a magnetic head slider mounting structure and a magnetic head slider used for the same, which reliably realizes the function of a gimbal spring as a suspension, improves the yield of products, and further improves reliability. The purpose is to

[0010]

In order to achieve the above object, the magnetic head slider mounting structure of the present invention has a magnetic head slider formed on a central tongue portion of a gimbal spring having a central tongue portion formed by a notch hole. In the structure in which the magnetic head slider is bonded to the magnetic head slider, at least a part thereof is provided with a groove corresponding to the cutout hole.

Further, the magnetic head slider of the present invention has a structure in which a concave groove, at least a portion of which corresponds to the cutout hole, is formed on the upper surface to which the central tongue portion formed in the gimbal spring by the cutout hole is bonded.

[0012]

According to the present invention, when the magnetic head slider is bonded to the central tongue portion of the gimbal spring which is formed by forming the central tongue portion which is separated from the peripheral mounting portion by the notch hole, the bonding surface of the magnetic head slider ( By forming a concave groove corresponding to the cutout hole in the periphery of the central tongue on the upper surface), even if the excess adhesive sticks out from the bonding area where it contacts the lower surface of the central tongue, Since it flows down into the surrounding groove, it is possible to prevent bridging between the central tongue portion and the peripheral mounting portion due to excess adhesive. Therefore, the magnetic head slider can be bonded to the gimbal spring without impairing the degree of freedom of movement of the central tongue portion with respect to the peripheral mounting portion, and the function of the gimbal spring as a suspension can be reliably realized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic head slider mounting structure according to the present invention and a magnetic head slider used therein will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. In these figures, 1A is a floating magnetic head for a hard disk drive, 2A is a magnetic head slider of the magnetic head 1A, and 6 is a gimbal spring of a thin elastic metal plate. On the bonding surface (upper surface) of the magnetic head slider 1A to which the gimbal spring 6 is bonded, a concave portion at least a part of which corresponds to the cutout hole 13 around the central tongue 14 is arranged. Groove 17
Is provided. In the groove 17, the pivot 15 at the center of the central tongue portion 14 is adhered to the magnetic head slider 1 at the time of bonding.
Since it is arranged so as to be located at the center of the upper surface, it is formed so as to correspond to the cutout hole 13 in the arranged state,
As shown in FIG. 3, it is formed in a square shape with the same width as the cutout hole 13.

The central tongue portion 14 of the gimbal spring 6 elastically supports the magnetic head slider 2A, and is fixed to the tip of a load spring 5 that applies a predetermined load to the magnetic head slider 2A to form a magnetic head support arm. That the step 12 is formed at the connecting portion between the central tongue portion 14 of the gimbal spring 6 and the peripheral mounting portion 11 so that the central tongue portion 14 is slightly lower than the peripheral mounting portion 11; The headpiece 3 is provided in 2A, etc., as in the conventional configuration shown in FIGS. 4 to 6.

Now, the mounting of the magnetic head slider 2A on the gimbal spring 6 will be described. First, the adhesive 18 is applied to the area S surrounded by the groove 17 on the adhesive surface (upper surface) of the magnetic head slider 2A. Then, as shown in FIG. 1, the pivot 15 at the center of the central tongue portion 14
However, the entire lower surface of the central tongue portion 14 is arranged in contact with the area S so as to be located at the center of the upper surface of the magnetic head slider 2A.
The entire lower surface of the central tongue portion 14 is directly attached to the magnetic head slider 2
A region S on the upper surface of A is closely adhered and adhered. At this time, the excess adhesive 18 protrudes from the region S that is in contact with the lower surface portion of the central tongue portion 14 and flows down into the concave groove 17 corresponding to the cutout hole 13 on the outer periphery of the central tongue portion 14 as shown in FIG. .

According to the structure of the above embodiment, the notch hole 13 on the outer periphery of the central tongue portion 14 is formed on the bonding surface of the magnetic head slider 2A.
By forming the concave groove 17 corresponding to
4 and the magnetic head slider 2A, since excess adhesive flows out from the adhesive surface (region S) facing the lower surface of the central tongue portion 14 to the concave groove 17 surrounding the central tongue portion 14, excessive adhesive agent It is possible to prevent bridging between the central tongue portion 14 and the peripheral mounting portion 11 due to the agent. Therefore, the magnetic head slider 2A can be bonded to the gimbal spring 6 without impairing the freedom of movement of the central tongue portion 14 with respect to the peripheral mounting portion 11.

In the above embodiment, when the magnetic head slider 2A and the gimbal spring 6 are bonded, the adhesive 18 is applied to the region S surrounded by the groove 17 of the magnetic head slider 2A. Of course, it does not matter if the adhesive 18 is applied to the lower surface of the tongue portion 14 for adhesion. Further, the concave groove 17 formed on the adhesive surface (upper surface) of the magnetic head slider 2A has a square shape as shown in FIG. 3 which surrounds the adhesive area of the central tongue portion 14 corresponding to the notch hole 13.
It may be U-shaped or the like corresponding to.

[0019]

As described above, according to the present invention,
When a magnetic head slider is bonded to the central tongue of a gimbal spring having a central tongue formed by a notch hole, at least a part of which is provided with a concave groove corresponding to the notch hole around the central tongue. By using the magnetic head slider formed in), even if the excess adhesive flows out from the adhesive area that contacts the lower surface of the central tongue, it will flow down into the concave groove surrounding the central tongue, so It is possible to prevent bridging between the peripheral mounting portion and. Therefore, in comparison with the conventional magnetic head slider mounting structure,
There is no risk of the central tongue sticking to the peripheral mounting part due to excess adhesive, and the magnetic head slider can be bonded to the gimbal spring without impairing the freedom of movement of the central tongue. The function as a suspension can be surely realized, and the yield and reliability of products can be improved. In addition, when the slider is formed by injection molding, it is easy to form the groove.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a magnetic head slider mounting structure according to the present invention and a magnetic head slider used therein.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view showing a magnetic head slider used in the embodiment.

FIG. 4 is a perspective view showing a conventional magnetic head slider mounting structure.

FIG. 5 is a plan view of the same.

6 is a cross-sectional view taken along the line VI-VI of FIG.

[Explanation of symbols]

 1, 1A Magnetic head 2, 2A Slider 6 Gimbal spring 11 Peripheral mounting portion 13 Notch hole 14 Central tongue portion 15 Pivot 17 Recessed groove 18 Adhesive

Claims (2)

[Claims] 1. A mounting structure of a magnetic head slider in which a magnetic head slider is adhered to the central tongue portion of a gimbal spring having a central tongue portion formed by a notched hole, at least a part of which is a groove corresponding to the notched hole. Is provided on the magnetic head slider. 2. A magnetic head slider characterized in that a concave groove, at least a portion of which corresponds to the cutout hole, is formed on an upper surface to which a central tongue portion formed in the gimbal spring by the cutout hole is adhered.