JPH1092132A - Magnetic head supporting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic head supporting apparatus which can replace one by one HGA(head gimbal assembly) and assures high reliability for tempera ture change. SOLUTION: This magnetic head supporting apparatus comprises HGA combining a head spacer 2a or 2b having a load spring 3a or 3b loading a magnetic head and an arm 1 for fixing HGA. Positioning is made depending on a boss having the same diameter as the positioning through hole of the arm 1 and fixing is then made by bonding the HGA and arm 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head support device for a magnetic disk drive, and more particularly, to a magnetic head support device having a structure in which a position is determined by a head spacer and a load spring is fixed to an end of an arm.

[0002]

2. Description of the Related Art In recent years, as the capacity of magnetic disk devices has increased and their size has been reduced, it has become necessary to mount a large number of magnetic recording media within a limited thickness of the device housing. As a result, the distance between the magnetic recording media becomes narrower. As a result, the thickness of an arm member for fixing a load spring on which a magnetic head for reading and writing data from and to the magnetic recording medium is mounted becomes thinner. I have. In response to such a reduction in thickness, the shape of a head spacer constituting a magnetic head supporting device has also changed as described below.

FIG. 2 is a cross-sectional view of a conventional magnetic head supporting device, and shows an arm 1 and an upper head spacer C2c.
A lower head spacer D2d, an upper load spring A3a on which a magnetic head (not shown) is mounted,
Similarly, a lower load spring B3b is provided. Head spacer C2c, head spacer D2d
Has a boss c and a boss d, respectively.

In such a configuration, the outer diameter of the boss d of the head spacer D2d is determined by the inner diameter of the positioning through hole of the arm 1, and the outer diameter of the boss c of the head spacer C2c is determined by the inner diameter of the boss d of the head spacer D2d. The boss c and the boss d are engaged with each other, and the head spacer C2c and the head spacer D2d are fixed to the arm 1 by an interlock structure.

By employing such an interlock structure, the thickness of the arm 1 can be made smaller than the total thickness of the boss c of the head spacer C2c and the boss d of the head spacer D2d. Thinner.

[0006]

A first problem in the above-mentioned prior art is that a head gimbal assembly (hereinafter referred to as an HGA) in which a load spring having a magnetic head and a head spacer having a boss are integrated. Written as
Is that one HGA cannot be replaced because it is fixed to the tip of the arm by an interlock structure. That is, one HGA is attached to one arm on the upper surface and one lower surface of one arm.
Since the head spacers of GA are engaged with each other,
Even if a problem occurs only in the HGA of the book and you want to replace it,
Both pieces come off as a set, which is uneconomic in both materials and man-hours.

The second problem is that since the upper and lower head spacers are not the same shape, the arm is thermally deformed due to a change in environmental temperature or a change in the temperature of the magnetic disk drive itself, and the head attitude changes, resulting in a large thermal off-track. This leads to reduced device performance and reliability.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a magnetic head supporting device which can replace HGAs one by one and which is highly reliable against temperature changes.

[0009]

A first magnetic head supporting apparatus according to the present invention comprises a head spring in which a load spring having a magnetic head mounted thereon and a head spacer having a boss are integrated.
A magnetic head support device comprising a gimbal assembly and an arm for fixing the head gimbal assembly, wherein the head gimbal assembly is positioned by a boss having the same diameter as a positioning through hole of the arm. And the arm are fixed by bonding.

According to a second magnetic head supporting device of the present invention, in the first magnetic head supporting device of the present invention, the boss has a notch.

The third magnetic head support device of the present invention is the same as the first or second magnetic head support device of the present invention,
The integration of the load spring and the head spacer is performed by welding or bonding.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
A head spacer A2a attached to the load spring A3a by welding or adhesion; a head spacer B2b attached to the load spring B3b by welding or adhesion; a load spring A3a attached to the upper surface of the arm 1 by adhesion; And a load spring B3b that is attached by bonding.

Head spacer A2a, head spacer B
2b is provided with a boss a and a boss b, respectively, and the boss a and the boss b have notches. The head spacer A2a and the head spacer B2b have the same shape, and are combined so that the notch of one boss fits the non-notch of the other boss. Further, a magnetic head (not shown) is mounted on the distal ends of the load springs A3a and B3b.

In the above configuration, the boss a of the head spacer A2a and the boss b of the head spacer B2b
Are respectively inserted into the holes of the arm 1 from above and below, and are separately positioned at the positions where the notches of the boss a and the boss b are fitted. Thereafter, a jig spacer is inserted between the head spacer of the HGA fixed to the upper and lower arms (not shown) and the head spacer of FIG. 1, and a constant load is continuously applied from above and below, so that the load spring A3a and the load When the springs B3b are individually adhered and fixed to one end surface of the arm 1, the jig spacer is removed, and H
GA bonding is completed.

At this time, the head spacer A2a having the boss a or the head spacer B2b having the boss b is
Thin load spring A3a or load spring B
3b is prevented from being deformed by adhesion.

As described above, the boss a or the boss b is used for positioning and preventing deformation due to the adhesion of the load spring, and is used for fixing the HGA by caulking the arm 1 or engaging the bosses. HGA,
Load spring A3a or load spring B3b
The arm 1 is fixed only by the adhesive. Therefore, the replacement of the HGA when a defect relating to the magnetic head occurs can be individually replaced by removing the adhesive between the load spring A3a or the load spring B3b and the arm 1.

In the above description, a boss having a notch is described. However, a boss having no notch may be used.

[0019]

The first effect of the present invention is that since the HGAs are individually bonded and fixed to the arms, it is possible to easily replace only one HGA without affecting the opposing HGAs across the arm. Is now possible.

The second effect is that since the upper and lower head spacers have the same shape, the arm is not thermally deformed due to a change in environmental temperature or a change in the temperature of the magnetic disk device itself, thereby preventing a reduction in device performance and reliability. is there.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional magnetic head support device.

[Explanation of symbols]

 1 Arm 2a Head spacer A 2b Head spacer B 3a Load spring A 3b Load spring B a, b Boss

Claims (3)

[Claims] 1. A head integrated with a load spring having a magnetic head and a head spacer having a boss.
A magnetic head support device comprising a gimbal assembly and an arm for fixing the head gimbal assembly, wherein the head gimbal assembly is positioned by a boss having the same diameter as a positioning through hole of the arm. A magnetic head supporting device, wherein the arm and the arm are fixed by bonding. 2. The magnetic head supporting device according to claim 1, wherein the boss has a notch. 3. The magnetic head supporting device according to claim 1, wherein the load spring and the head spacer are integrated by welding or bonding.