JP2770519B2 - Magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for a magnetic disk drive used for recording and reproducing data of a computer or the like.

2. Description of the Related Art Recently, a floating magnetic head used for a fixed disk for recording data of a computer, which has rapidly progressed, has two cores made of an oxide magnetic material or the like provided with a minute gap serving as a magnetic gap. A core slider is used in which a floating surface is formed by machining or the like for obtaining a lift in which an air flow is generated by rotation of a magnetic disk after fusion with a glass for use.

 Hereinafter, a conventional magnetic head will be described.

FIG. 4 is a plan view of a conventional magnetic head, and FIG. 5 is a plan view of a conventional magnetic disk drive.

As shown in these figures, a supporting spring 3 is bonded and fixed to a core slider 2 having a recording / reproducing gap 1 with an epoxy resin or the like. The support spring 3 has a supporting portion (flexure) 13 having a portion (tong) for bonding the core slider 2 and a portion (outrigger) for giving a degree of freedom to the core slider 2, and an air flow generated by rotation of the magnetic disk 11 is used as a floating surface. (Load beam) 5 that gives a load that balances the lift given to the vehicle
And a mounting portion (mounting portion) 6 to an arm (carriage arm) that moves to a predetermined recording track position. In this case, the center line of the flexure 13 coincides with the center line 9 of the support spring 3, as shown in FIG.

In the conventional magnetic disk drive shown in FIG. 5, as a seek method for moving to a predetermined recording track position, a linear seek method for linearly moving in a radial direction, and a swing method for moving in an arc around a fulcrum. There are two types of arm seek methods. Both have their strengths and weaknesses, but recently the swing arm seek method has been increasing to shorten the access time.

However, in the above-mentioned conventional configuration, as can be seen from FIGS. 4 and 5, when the recording / reproducing gap 1 is located above the innermost recording track 12 of the magnetic disk 11, Despite the fact that the relative speed with respect to the magnetic disk 11 becomes the slowest and the output of the magnetic head decreases, the recording / reproducing gap 1
However, there is a problem in that the output is further reduced because it is not perpendicular to the tangent to the recording track 12.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic head whose output does not decrease so much even when the magnetic head is located on the innermost recording track 12 of the magnetic disk 11. It is the purpose.

Means for Solving the Problems In order to achieve this object, a magnetic head according to the present invention has a flexure of a support spring having a U-shape, and a core slider adhered in parallel to an adhesion portion (tongue) of the flexure. The angle formed between the center line of the flexure and the center line of the support spring is set so that the recording / reproducing gap is perpendicular to the tangent to the recording track on the innermost recording track of the magnetic disk.

Operation With this configuration, when the magnetic head is positioned on the innermost recording track of the disk, the recording / reproducing gap is perpendicular to the tangent to the recording track, so that the magnetic head is positioned at the innermost circumference of the disk. In this case, good characteristics can be obtained without a significant decrease in the output of the magnetic head.

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

FIG. 1 is a plan view of a magnetic head according to an embodiment of the present invention, FIG. 2 is a detailed view of the flexure, and FIG. 3 is a plan view of a magnetic disk drive using the magnetic head. In FIG. 1, a core slider 2 formed by fusing a core made of an oxide magnetic material or the like with a small gap serving as a recording / reproducing gap 1 and bonding glass with a bonding glass is bonded to a flexure 4 with an epoxy resin or the like. Flexure 4 and core slider 2
The support spring 3 including the load beam 5 for applying a load for balancing the lift generated by the rotation of the magnetic disk and the mount 6 for fixing are laser-welded. Second
The figure shows a detailed view of the flexure 4. The flexure 4 has a U-shape, and is formed with a tongue 7 which is a portion to which the core slider 2 is bonded, and an outrigger 8 which gives the core slider 2 a degree of freedom. Core slider 2 parallel to tongs 7
Is adhered with a resin or the like, as shown in FIG.
And the center line 10 of the core slider 2 is inclined at a certain angle θ. As shown in FIG. 3, when the magnetic head is positioned over the innermost recording track 12 of the magnetic disk 11, the recording / reproducing gap 1 provided on the core slider 2 is tangent to the innermost recording track 12. By setting the angle θ so as to be perpendicular to the output, it is possible to prevent the output from decreasing. This angle takes a value between approximately 1 ° and 50 ° in consideration of the size of the magnetic disk device and the amount of the core slider 2 floating above the magnetic disk 11.

As described above, in the magnetic head of the present invention, even when the magnetic head is positioned on the innermost recording track of the magnetic disk, the recording / reproducing gap provided in the core slider is positioned with respect to the tangent of the recording track. Since the flexure has a V-shape so that it becomes a right angle, the output of the magnetic head does not decrease so much even when it is located at the innermost circumference where the relative speed with the magnetic disk is the slowest, and good characteristics are obtained. Can be withdrawn.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic head in one embodiment of the present invention, FIG. 2 is a detailed view of the flexure, FIG. 3 is a plan view of a magnetic disk drive using the magnetic head, and FIG. FIG. 5 is a plan view of a magnetic head, and FIG. 5 is a plan view of a conventional magnetic disk drive. 1 ... Recording / playback gap, 2 ... Core slider, 3 ...
Support spring, 4 ... flexure.

Claims (2)

(57) [Claims] A magnetic head having a floating core slider, a flexure for giving at least a degree of freedom to the core slider, and a support spring composed of a load beam for applying a head load to the core slider, wherein the flexure is in the shape of a dogleg. 2. An angle between a portion of the flexure to which the core slider is bonded and the load beam, the recording / reproducing gap provided in the core slider at the innermost circumference of the magnetic disk being tangential to the recording track at the innermost circumference of the magnetic disk. 2. The magnetic head according to claim 1, wherein the magnetic head is at right angles.