JPH03216878A - Magnetic head supporting body - Google Patents

Abstract

PURPOSE:To avoid an accident of contact between a head and a rotating disk by keeping a load arm end part and a slider contactless. CONSTITUTION:A gimbals 3 has the left end fixed to a load arm 4 by spot welding and has the right end adhered to a slider 2, and a slice-shaped permanent magnet 7 is stuck to an about center of the slider 2. Another slice-shaped permanent magnet 6 which has magnetic poles arranged to repel the permanent magnet 7 is stuck to a part, which corresponds to the center of the slider, in the front end part of the load arm 4. The repulsive power of these two magnets acts as the force with which the slider is pressed to the disk surface, and its magnitude is determined by the spring property of the load arm 4. The slider is supported without positional deviation and is elastically supported to follow up waving and disk oscillation of the disk surface in this manner, and the pressing force is given. Thus, the accident of contact between the head and the rotating disk is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head support device, and more particularly to a head support device that is used for heads of magnetic disks and floppy disks and has a large damping effect against external vibrations. .

[Conventional technology]

2. Description of the Related Art Supporting devices for heads that record and reproduce information using rotating media such as magnetic disks and floppy disks are required to have a vibration damping effect. In other words, in order to maintain the head position for accurate recording and playback by reducing the effects of wind pressure caused by high-speed rotation of the rotating disk and disturbances caused by external vibrations, the head support device must have a damping effect. There is a need.

A conventional head support device is, for example, disclosed in Japanese Utility Model Application No. 60-128.
As described in Japanese Patent No. 64, a block member filled with an adhesive is used to provide a damping effect to the base of the load arm.

[Problem to be solved by the invention]

However, these are not effective against load arm vibration caused by wind pressure. Furthermore, due to the mounting position, a slight deformation in this portion will be greatly magnified at the head position, which is undesirable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hanging head support device that avoids accidental contact between the head and a rotating disk.

[Means to solve the problem]

The above problem is achieved by maintaining a non-contact state between the end of the load arm and the slider.

[Effect]

The conditions for supporting the slider are to prevent positional displacement, provide elastic support so that it can follow the undulations and vibrations of the disk surface, and provide pressing force.

Therefore, the gimbal section rigidly supports the slider in a plan view and has a degree of freedom in rotation. Further, the structure is such that the pressing force is applied to the center point of the slider by a load arm.

In this structure, since the force applied to the slider is the magnetic force provided at the tip of the load arm, most of the mechanical vibration of the load arm is attenuated. In particular, high frequency components can be removed. Although a transmission component remains through the gimbal section, the gimbal section itself is originally a flexible elastic thin plate, and the amount of transmission is extremely small.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a sectional view of the vicinity of the cymbal part of the present invention, FIG. 2 is a perspective view of the magnetic head support including FIG. 1, and FIG. 3 is a result showing the damping effect of the head support of the present invention. .

In FIG. 2, 1 is a magnetic head, 2 is a slider equipped with the magnetic head 1 and flies above the rotating disk surface, 3 is a gimbal that elastically supports the slider 2, and 4 is the slider 2.
5 is a head arm portion to which the load arm 4 is fixed. FIG. 1 is a sectional view of the mounting portion of the slider 2. FIG. The left end of the gimbal 3 is spot welded to the load arm 4, and the right end is bonded to the slider 2. Further, a permanent magnet 7 in the form of a flake is attached to the slider 2 at approximately the center thereof. On the other hand, another thin permanent magnet 6 is attached to the tip of the load arm 4 at a portion corresponding to the center of the slider, the permanent magnet 6 being polarized so as to repel the permanent magnet. The repulsive force of these two magnets becomes a pressing force on the disk surface of the slider, and its magnitude (approximately 10 gf) is determined by the springiness of the load arm 4.

In order to demonstrate the effect of vibration isolation according to the above embodiment, the guide arm 5 was vibrated in the vertical direction at a random frequency, and the range of variation in the flying height of the slider with respect to the vibration amplitude was measured. In Figure 4,
The experimental results are shown below.

FIG. 4 shows the results of an experiment comparing the damping effect between a conventional head support device that does not use viscoelastic rubber and the first embodiment of the present invention. The horizontal axis is frequency (Hz). The vertical axis shows the amplitude ratio. As a result, the resonant frequency is 1920
Although the Hz decreases to approximately 1700Hz, the amplitude ratio significantly decreases to 26dB, and the frequency decreases from 800 to 2200Hz.
10 to 20 dB in the high frequency region above z! Reduced by 3 and
In the high frequency region of 2200 Hz or higher, almost complete attenuation was observed.

As described above, according to this embodiment, the vibration isolation of the support is achieved by eliminating contact parts such as the load arm and the slider, which not only allows highly accurate positioning of the magnetic head but also allows the head to float stably, thereby preventing crash accidents. It has a great effect on prevention.

Another effect is that in the conventional pivot part, the characteristics deteriorated due to wear and deformation at the contact point, but in this example, the non-contact structure eliminates aging deterioration, which has a large effect on improving reliability. be.

〔Effect of the invention〕

According to the present invention, when recording and reproducing data on a rotating disk medium with a head, the influence of external vibrations and disturbances due to fluid is reduced, accurate head position is maintained, and contact accidents between the head and the rotating disk can be avoided. It is possible to provide a head support device that can prevent this.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the vicinity of the gimbal part of a head support according to an embodiment of the present invention, FIG. 2 is a perspective view of the entire head support including the gimbal part shown in FIG. 1, and FIG. FIG. 2 is a diagram obtained by measuring vibration transmission of the head support shown in FIG. 1; 2... Slider, 3... Gimbal, 4... Load arm, 6... Thin piece permanent magnet, 7... Thin piece permanent magnet.

Claims (1)

[Claims] 1. A floating slider equipped with a magnetic head, a gimbal part connected to the slider and elastically supported, and a gimbal part that fixes a part of the gimbal and resists the buoyancy of the slider. A head support device comprising a load arm support section that applies a pressing force to the slider in the direction of the medium disk, wherein magnets that repel each other are disposed on each of the load arm section that applies the pressing force and the upper part of the slider. . A magnetic head support, wherein the load arm and the slider are configured to maintain a non-contact state.