JPS63144472A - Suspension for floating magnetic head device - Google Patents

Abstract

PURPOSE:To obtain stable electromagnetic transducing characteristics by drilling a hole of proper size and shape to a part of a flat face of a load arm to change a resonance point and attenuating the displacement at the resonance point. CONSTITUTION:A gimbal 3 mounted with an electromagnetic transducing element is fixed to the tip of the load arm 1 and a spacer 4a is provided to the base of the load arm 1 fixed to the head arm, and in a suspension for the floating magnetic head device provided with the spacer 4a, a long hole 1e with proper size and shape is drilled to a part of the flat face 1d inbetween the side of the load arm 1 opposed to the disk for the manufacture of the suspension. Thus, the resonance point is changed and the resonance level is attenuated to obtain a stable electromagnetic transducing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a suspension for a floating magnetic head device used in a magnetic disk device or the like.

[Conventional technology]

A suspension for a floating magnetic head device used in a magnetic disk device, etc., for example, as shown in PIS 3, has a core slider 2 attached to the tip of a load arm 1 consisting of a triangular and tapered wing plate. A spacer 4att@ is provided at the base 1a on the short side of the load arm 1 to which the gimbal 3 to be attached is fixed and which is fixed to the head arm 4.

The two long edges 1b of the load arm 1, except for the width W near the base 1a fixed to the head arm 4,
The others are bent almost at right angles to the opposite side of the disk 5,
It maintains rigidity against bending.

Therefore, the base 1a without the bent edge 1b is
The spring part IC has some elasticity.

[Problem that the invention seeks to solve]

The core slider 2 of the magnetic head device has a thickness of 0.2 to 0.5 μm as the magnetic disk 5 rotates (in the direction of the arrow A).
However, if this levitation is stable, the electromagnetic conversion characteristics will also be stable.

However, in reality, vibrations occur during the seek operation in the direction of arrow B and are transmitted to the core slider 2 through the load arm 1, making the characteristics unstable, and in the worst case, the core slider 2 hits the magnetic disk 5. , core slider 2
Alternatively, the functionality of the magnetic disk 5 may deteriorate.

Further, the vibration of the core slider 2 is caused not only by the above-mentioned seek operation but also by factors such as vertical movement due to warping of the disk 5, load due to wind generated when the disk 5 rotates, and the like.

Further, vibrations are also generated due to contact between the disk 5 and the core slider 2 when the disk 5 is started or stopped.

If the resonance point of the load arm 1 coincides with the frequency of the vibration caused by the above-mentioned factors or is located near it, the load arm 1 will swing significantly and the electromagnetic conversion characteristics will become unstable.

The present invention provides a suspension that suppresses vibration interference with the device by changing the resonance point of the load arm 1 and destroying the displacement at the resonance point, thereby making it possible to obtain a magnetic head device with stable electromagnetic conversion characteristics. The purpose is to

[Means for solving problems]

The present invention has been made to solve the above problems, and is characterized in that a hole of an appropriate size and shape is formed in a part of the flat surface between the tip and the base of the load arm. It is something.

[For production]

By drilling holes in the flat surface, the resonance point changes and the resonance level is attenuated, resulting in stable electromagnetic conversion characteristics. .

[Example 1] In a floating magnetic head device as shown in Fig. MS3,
A flat surface in the middle of the side facing the disk 5 of the load arm 1 (lower surface side in figure pt'S3) with length L''25 mm, width a of the short side of the base 1a = about 6 m + s, and width W of the spring part IC = 3 mm. A long hole 1 as shown in FIG. 1 is formed in a part of the surface 1d.
I made Suspense 1, which was released after e.

As shown in Figure 4 (&), this Susbenzidine is
The part of the workpiece 6 of the resonance measuring device, which consists of an excitation 8!7 that attaches the workpiece 6 and gives it vibration, a displacement sensor 8, a spectrum analyzer 9, an amplifier 10, and a G meter 11, and connects these with wiring. The resonant point was measured by attaching it to a conventional product and compared with a conventional product whose resonant point was measured in the same way.

That is, as shown in FIG. 4(b), a suspension workpiece 6 with a core slider 2 attached to the tip of the load arm 1 was attached at 4:12 p.m., and the resonance point was measured. The measurement position is X of the spring IC as shown in Figure 153.
It was marked as a dot.

This point is a position away from the center in the longitudinal direction, and is a position where the vibration displacement +S''Nk in the direction perpendicular to the longitudinal center line also appears large.

The measurement results are shown in FIGS. 5(a) and 5(b), where (a) is the conventional product and (b) is the inventive product in this example.

As seen in Figure tj & 5 (b), the product of the present invention has (a
), it can be seen that the resonance point has changed and the displacement at the resonance point has been attenuated.

[Example 2] As shown in Figure ttS2, the flat surface 1d of the load arm 1
We made a suspension with a circular hole IC in a part of it.

Regarding this suspension, the resonance point was measured in the same manner as in Example 1, and the results shown in FIG. 5(e) were obtained.

Comparing this with FIG. 5(a) above, it can be seen that the resonance point changes and the displacement at the resonance point is attenuated, as in the case of Example 1.

〔Effect of the invention〕

As mentioned above, the suspension of the present invention can change the resonance point and attenuate the displacement at the resonance point by making a hole of an appropriate size and shape in a part of the flat surface of the load arm. Therefore, a floating magnetic head device using this can be made to have stable electromagnetic conversion characteristics.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a suspension showing one embodiment of the present invention, FIG. 2 is a plan view showing another embodiment, FIG. 3 is a perspective view of a floating magnetic head device, and pIS4 (a) is An explanatory diagram of the resonance point measuring device, Fig. 4(b) is similar to Fig. 4(a).
) Enlarged view of C in Figure 5 (a), (b), (e)
is a diagram of resonance point measurement results. 1: Load arm, 1a: Base, 1d: Flat surface, 2: Core slider, 3 Nishin Pal,
4: Head arm, 4a varnish spacer-15:
Disc agent Patent attorney Takashi Honma Figure 1/e light (multiplication table)

Claims (1)

[Claims] In a suspension for a floating magnetic head device in which a gimbal for mounting an electromagnetic conversion element is fixed to the tip of a load arm, and a spacer is provided at the base of the load arm fixed to the head arm, one of the intermediate flat surfaces of the load arm is fixed. A suspension for a floating magnetic head device, characterized in that a hole of an appropriate size and shape is formed in the suspension.