JPS63144475A - Suspension for floating type magnetic head device - Google Patents

Abstract

PURPOSE:To obtain stable electromagnetic transducing characteristics by providing a swollen part of a plane or rib form to the flat face inbetween the load arm to vary a resonance point and to attenuate the displacement at the resonance point. CONSTITUTION:A gimbal 3 mounted with an electromagnetic element is fixed to the tip of a load arm 1 and a spacer 4a is provided to the base of the load arm 1 fixed to the head arm, in a floating type magnetic head device suspension provided with the spacer 4a, a flat swollen part 1e is provided to a flat face 1d between the tip of the load arm 1 and the base 1a in a direction of a ridge 1b, that is, at the opposite side to the disk to manufacture the suspension. Thus, the resonance point is varied and the resonance level is attenuated to obtain stable electromagnetic transducing characteristics.

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]

For example, as shown in FIG. 3, a suspension for a floating magnetic head device used in a magnetic disk device, etc. has a load arm 1 made of a triangular and tapered metal plate.
A cymbal 3 to which a core slider 2 is mounted is fixed to the tip of the load arm 1, and a spacer 4a is provided at the base 1a on the short side of the load arm 1 fixed to the head arm 4.

The two long edges 1b of the load arm 1, except for the area @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 portion 1a without the bent edge portion 1b serves as a slightly elastic spring portion 1c.

[Problem that the invention seeks to solve]

The core slider 2 of the magnetic head device has a 0.2 to 0.5 μ-
However, if this levitation is stable, the electromagnetic conversion characteristics will also be stable.

However, in reality, vibration occurs during the seek operation in the B top direction and is 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. This may cause functional deterioration of the core slider 2 or the magnetic disk 5.

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.

Furthermore, vibrations are also generated due to the vibration of the disk 5 and the contact between the disk 5 and the core slider 2 when the disk 5 is stopped.

If the resonance point of the load arm 1 coincides with or is located near the resonance point of the vibration generated by the above-mentioned factors, 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 suspension of the device by changing the resonance point of the load arm 1 and attenuating 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 provide the following.

[Means for solving problems]

The present invention has been made to solve the above-mentioned problems, and is characterized by providing a planar or lip-shaped bulge on the flat surface between the tip yIIffS and the base of the load arm. It is something.

[For production]

By providing the bulge on the intermediate flat surface of the load arm, the resonance point changes and the resonance level is reduced, resulting in stable electromagnetic conversion characteristics.

[Example 1] In a floating magnetic head device as shown in FIG.
Length L” 25 am, width a of the short side of base 1a = 6i
Load arm 1 with width W of spring part 1b = 3 mm, about ui
A susbenzitan is provided with a planar bulge 1e as shown in FIG. 1 on a flat surface 1d between the tip and the base 1a in the direction in which the edge 1b is formed, that is, on the opposite side from the disk 5. Manufactured.

As shown in Figure 4(a), this subengitane is
a vibrator 7 that attaches the workpiece 6 and vibrates it;
It consists of a displacement sensor 8, a spectrum analyzer 9, a 7 amplifier 10, and a G meter 11, and these are attached to the workpiece 6 of a resonance measurement device connected by wiring, and the resonance point is measured. A comparison was made with the conventional product that was measured.

That is, as shown in FIG. 4(b), a suspension workpiece 6, in which the core slider 2 was attached to the tip j11 of the load arm 1, was attached to the jig 12, and the resonance point was measured. 11 The fixed position is the spring part 1c as shown in ff13 figure.
The point is marked with an X.

This position 7 is a position away from the center in the longitudinal direction, and is a position where the displacement of vibration in the direction perpendicular to the longitudinal center line appears the largest.

The measurement results are shown in Figures 5(,) and (b).

(a) is a conventional product, and (b) is an inventive product in this example.

As seen in FIG. 5(b), it can be seen that the resonance point of the product of the present invention changes compared to the product of FIG. 5(a), and the displacement at the resonance point is annihilated.

[Example 2] As shown in Fig. fi2, a suspension was manufactured in which two rib-like bulging portions 1e were provided parallel to the edge portion 1b of the load arm 1.

Regarding this suspension, the resonance point was measured in the same manner as in Example 1, and the results shown in pIS5 diagram (e) were obtained.

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

〔Effect of the invention〕

As described above, the suspension of the present invention can change the resonance point and attenuate the displacement at the resonance point by providing a planar or curved bulge on the intermediate flat surface of the load arm. Therefore, a floating magnetic head device using this can have stable electromagnetic conversion characteristics.

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of a suspension showing one embodiment of the present invention, FIG. 1(b) is a sectional view taken along the line A-A in FIG. 1(a), and FIG. A plan view showing an example,
Pt52 figure (b) is a BB sectional view of figure 2 (a), tj
Figure Sa is a perspective view of the floating magnetic head device, Figure 4 (a)
) is an explanatory diagram of the resonance point measuring device, Figure 4(b) is an enlarged view of C in Figure 4(a), fJS5(a), (b)
) and (c) are diagrams of resonance and α measurement results. 1: load arm, 1a: base, 1d: flat surface, 1e: bulge, 2: core slider,
3 Nishin Pal, 4: Heradarm, 4a
Nispacer-15: Disc agent Patent attorney Takashi Honma/Kami! 5 No Figure 2 Figure 3 Figure 5 (a) (b) (C) gL t Huan (KH2)

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, a flat surface in the middle of the load arm is provided with: A suspension for a floating magnetic head device characterized by having a planar or rib-shaped bulge.