JPH02273314A - Magnetic head for floppy disk device - Google Patents

Abstract

PURPOSE:To reduce manufacturing costs without degrading performance by forming a gimbal spring of a plastic material, and applying an electrostatic eliminating conductive coating on the surface of the spring. CONSTITUTION:The plastic material is used for a gimbal spring 4A. On the surface of the plastic gimbal spring 4A, electrostatic eliminating conductive coating 7 is applied. As the plastic material for the spring 4A, Polyarelate(R) (made by Unitika Ltd.) with high mechanical strength is used, a silver filler is coated by 10mum coating film width by a spray method as a coating 7, and dried by an extreme infrared heating. Thus the manufacturing costs can be reduced without degrading the performance.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic head for a floppy disk device.
In particular, it relates to improvements in gimbal springs.

[Conventional technology]

Figure 2 shows National Technical Re.
Port, 31-2.144 (1985) is a side view showing a conventional magnetic head for a floppy disk. In Fig. 99, (1) is a slider, (2) is a magnetic core, (3) is a pack core, (4) is a gimbal spring equipped with these, which is made of Bθ-Cu alloy or stainless steel. (5) is an FPC (6) is a conductive adhesive that connects the magnetic core (2), back core (3) and FPC! (5
This is for establishing mutual continuity with 1.

That is, static electricity is accumulated in the magnetic core (2) due to contact between the magnetic head and the flexible medium, which causes noise, so the static electricity is removed by the above-mentioned conduction.

[Problem to be solved by the invention]

As mentioned above, conventional magnetic heads for floppy disk drives use Bθ-Ou or stainless steel as the gimbal spring material, so special processing such as etching is required to obtain the desired shape, which increases the cost. There was a problem in that it became high.

The present invention was made to solve the above problems, and an object of the present invention is to obtain a magnetic head for a floppy disk device at low cost.

[Means to solve the problem]

The magnetic head for a floppy disk device according to the present invention has the following features:
The gimbal spring (4A) is made of plastic, and its surface is coated with conductive paint (7) for removing static electricity.

[Effect]

The production cost of the gimbal spring in this invention is low due to the use of plastic, and static electricity and energy are removed by the conductive paint on the surface of the gimbal spring.

〔Example〕

An embodiment of this invention will be described below. That is, in Fig. 1, the same parts as those in Fig. 2 are given the same reference numerals, and the duplicate explanation will be omitted.
) is a plastic gimbal spring of this invention, the surface of which is coated with conductive paint (7) for removing static electricity.
is coated.

Specifically, the plastic used is polyarylate (manufactured by Unitika Co., Ltd.), which has high mechanical strength, and the conductive paint +71 uses silver as a filler.
The coating was applied by a spray method to a coating thickness of 10 μm, and dried by far-infrared heating.

Table 1 shows a performance comparison between a conventional gimbal spring using a Be-(!u gold alloy) and a gimbal spring of the present invention using plastic. This is a comparison of the error rate when

Table 1 As can be seen from Table 1 above, there is no difference in performance between the two, but in the case of the gimbal spring of this invention made of plastic, the manufacturing cost is lower.

〔Effect of the invention〕

Plastic is used for the gimbal spring in the magnetic head for floppy disk drives invented by Kono.

Moreover, since the surface is coated with a conductive paint for eliminating static electricity, it has the effect of reducing manufacturing costs without reducing performance.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the magnetic head for a floppy disk device of the present invention, and FIG. 2 is a side view showing a conventional magnetic head for a floppy disk device. In the figure, (4A) is a gimbal spring, and (7) is a conductive paint. In other figures, the same reference numerals indicate the same parts. Figure 1

Claims (1)

[Claims] A magnetic head for a floppy disk device, characterized in that a gimbal spring is made of plastic, and a conductive paint for removing static electricity is applied to the surface of the gimbal spring.