JPH073513Y2 - Magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A magnetic head mounted on a magnetic disk device, and more particularly, a magnetic head having an increased rigidity in the access direction, for the purpose of increasing the rigidity of a spring arm against access acceleration. A spring of a spring arm fixed to a highly rigid support arm for elastically supporting a slider holding a gap part for reading or writing and for accessing the gap part by rotating the magnetic disk around a pivot axis. The width of the rotation direction of the portion is gradually increased from the support arm side to the slider side.

[Industrial application field]

The present invention relates to a magnetic head mounted in a magnetic disk device, and more particularly to a magnetic head having increased rigidity in the access direction.

[Conventional technology]

The magnetic head is generally composed of a highly rigid support arm that performs an access operation, and a spring arm that is fixed to the support arm and elastically supports the slider at the tip and the gap portion. When fixing this spring arm to the support arm, there is a holding portion for holding the lead wire from the gap portion at the tip of the support arm. Therefore, the fixing portion at the base of the spring arm is fixed to the support arm. It was often formed smaller than the width of the tip.

[Problems to be solved by the device]

However, recently, there has been a demand for downsizing and high access of the magnetic head, and the spring arm of the magnetic head may not be able to withstand the acceleration during the access.

Therefore, an object of the present invention is to increase the rigidity of the spring arm with respect to the access acceleration in order to solve such a problem.

[Means for Solving the Problems]

In order to solve the above problems, a magnetic head according to the present invention is
A spring arm fixed to a highly rigid support arm that elastically supports a slider that holds a gap portion for reading or writing a magnetic disk and that allows the gap portion to be accessed by rotating the magnetic disk about a pivot axis. The constitutional feature is that the width of the spring portion in the rotation direction is gradually increased from the support arm side to the slider side.

[Action]

Since the rotation direction width of the spring portion of the spring arm is gradually increased from the support arm side to the slider side,
The rigidity in the access direction of the spring arm can be improved while satisfactorily satisfying the size limitation of the support arm.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 2 shows a main part of a magnetic disk device for a four-layer magnetic disk. A plan view of this device as seen from the direction of arrow A is shown in FIG.
A spring arm 18 is fixed to a tip end of a support arm 10 made of a high-rigidity member rotatable about a center axis. This spring arm 18 has a slider 14 at its tip.
Is attached, and the slider 14 is provided with a gap portion 15
Holding

When reading or writing the magnetic disks 24 laminated in multiple layers, as shown in FIG. 2, the magnetic heads having the above-described structure are provided so as to face both surfaces of each magnetic disk 24. A total of eight magnetic heads are fixed to one support arm 10, and all magnetic heads centering on the pivot 12 simultaneously access each surface of each magnetic disk 24. At the time of this access, the slider 14 at the tip of each spring arm 18 and the gap portion 15 can approach and face the surface of each magnetic disk 24, so that the root portion of each spring arm 18 is composed of a spring portion 16 made of a simple plate member, In the free state, each spring arm is bent in the direction of pressing the surface of each magnetic disk 24 from its mounting portion toward the tip. Reference numeral 22 is a flange, and each spring arm 18 is configured such that only the root region 16 attached to the support arm 10 is flexible without flanges on both edges.

The spring arm 18 rotates with the support arm 10 around the pivot 12 to access the magnetic disk 24 in the direction of arrow A in FIG. In the past, this access was used at an acceleration of, for example, about 20 × 9.8 m / s ² , but with the recent miniaturization and higher speed, it is required to use about 60 × 9.8 m / s ² , for example. . At this time, if the spring arm 18 does not have sufficient rigidity with respect to the force in the direction of arrow A, the followability of access is deteriorated due to its inertia, and a situation in which access is impossible may occur. Therefore, in the present invention, by holding a lead wire (not shown) from the gap portion 15 inside the flange 22 of the spring arm 18, the tip portion of the support arm 10 is freed, and the mounting portion of the spring arm 18 is correspondingly freed. It is possible to maximize the width dimension of the root region 16 (dimension in the rotation direction A). In this embodiment, the root region 16 extends from the tip of the support arm 10 into a trapezoidal shape, but may have a rectangular shape. From the viewpoint of the moment of inertia, the spring arm 18 needs to have a smaller mass as it is closer to the tip, so that it has a tapered shape as shown in FIG.

[Effect of device]

According to the present invention, the rigidity of the spring arm in the access direction can be maximized and the moment of inertia can be kept small within the size of the support arm in the demand for miniaturization, and the magnetic strength can withstand high-speed access. The head can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic head according to the present invention, and FIG. 2 is a side view of a magnetic disk device. 10 …… Support arm, 16 …… Spring part, 18 …… Spring arm, 24 …… Magnetic disk.

Claims (1)

[Scope of utility model registration request] 1. A slider (14) holding a gap (15) for reading or writing a magnetic disk (24) is elastically supported, and the gap is centered on a pivot (12) with respect to the magnetic disk. The rotation direction width of the spring portion (16) of the spring arm (18) fixed to the highly rigid support arm (10) is changed from the support arm (10) side to the slider (14) side. A magnetic head characterized by being gradually increased over time.