JPS5830262Y2 - magnetic head - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic head, and in particular, a core part is supported by a spring with a plurality of conductive spring strips arranged in the same plane, and the rear end of the spring strip is flexible. The present invention relates to a floating magnetic head that is connected to a connector via a magnetic cable, and is applied to, for example, a magnetic head used in a magnetic disk device or magnetic drum device connected as an external storage device of a computer.

FIG. 1 shows a front view and a plan view of a conventional floating magnetic head, and FIG. 2 shows a detailed connection between a spring terminal and a cable terminal.

In FIGS. 1 and 2, 1 is a core portion of a magnetic head;
2 is a support spring, 3 is a support spring terminal, 4 is a flexible cable, 5 is a support spring block, and 6 is a connector.

The support spring 2 is composed of ten or more copper strips arranged in the same plane.

Then, the wire ends of the flexible cables 4 and the soldering at the support spring terminals 3 are electrically connected by operation.

7 indicates solder, and 11 indicates a connecting portion.

However, the beryllium copper strips constituting the conventional support spring 2 have a width of about 0.311L7IL and a pitch of about 0.7vILm, so the distance between adjacent strips is about 0.3L7IL.
4, which is very narrow, and when soldering, there are various inconveniences such as a large amount of work required to tie the wires of the flexible cable 4 to the support spring terminal 3, and short circuits due to incorrect wiring solder bridges. was there.

The purpose of the present invention is to eliminate the above-mentioned disadvantages of the conventional technology and to provide a magnetic head having a structure that does not require the work of tying or soldering the wires of the flexible cable to the support spring terminal. It is something to do.

The feature of the present invention is that a plurality of conductive spring strips are formed on the surface of a flexible insulating film to be used as a flexible cable, and the front portion of these spring strips supports its 11 core portion. The purpose is to create a structure that can be used as a support spring.

The present invention will be explained below with reference to the drawings.

FIG. 3 shows an embodiment of the present invention, and is a side sectional view of a part in which a flexible cable and a support spring are integrally formed, and FIG. 4 shows a magnetic head using the integrally formed part of FIG. 3. They are a side view and a plan view.

An integrally formed product of a flexible cable and a support spring is produced as follows.

As a spring material that satisfies the characteristics of the support spring 2, beryllium copper or stainless steel is used.

In order to ensure the spring constant required by the support spring 2, the thickness of the spring plate is selected to be approximately 501 Im.

Therefore, a strip-shaped spring material having this thickness is divided into a front part that becomes the support spring 2 and a rear part that becomes the flexible cable 4, and the rear part is pasted on the insulating film base 8.

Next, the rear spring material and the front spring material pasted on the insulating film base 8 are etched all at once to form a predetermined number of spring strips having a predetermined width.

After that, an insulating film cover 9 is further attached to the rear part to form a flexible cable part.

In this way, the flexible cable 4 and the support spring 2 can be made all at once, eliminating the need for solder connection, reducing the number of work steps required for connection, and improving reliability.

Flexible cable 4 and support spring 2 obtained according to Fig. 3
To incorporate the integrally formed product into a magnetic head, attach the tip of the support spring 2 to the core part 1 as shown in FIG.
First, the rear end of the flexible cable 4 may be connected to the connector 6.

These installation operations are the same as those for magnetic heads of conventional structure.

FIG. 5 is a sectional view showing another embodiment of the present invention, in which the thickness of the spring strip of the flexible cable 4 and the thickness of the spring strip of the support spring 2 are different.

That is, in the embodiment shown in FIG. 3, each spring strip was etched all at once from the same strip-shaped spring plate, so the thickness of each spring strip was the same.

However, if the thickness of the spring strip of the support spring 2 is used as the thickness of the spring strip of the flexible cable 4, the rigidity of the flexible cable 4 will increase, and the original flexible cable In some cases, the characteristics of the product may be impaired.

According to the embodiment shown in FIG. 5, the above problem is solved.

1. The thickness required for the support spring 2 is, for example, 50 μm.
) is divided into a front part which will become the support spring 2 and a rear part which will become the flexible cable 7'' 4, and this rear part will be pasted on the insulating film base 8, and then the front part and the rear part will be separated. are etched all at once to form a predetermined number of spring strips having a predetermined width.

Furthermore, resist is applied to the front part, which will become the support spring 2, and beryllium copper is coated, and the thickness of the rear part, which will become the flexible cable 4, is etched to a predetermined thickness. .

Thereafter, an insulating film cover 9 is further attached to the flexible cable portion, thereby creating an integrally formed product of the support spring and the flexible cable.

According to the present invention, there is no need for soldering, which was required with conventional products, and the work for tying the wires of the flexible cable to the support spring terminals, which reduces the number of work steps, and also reduces wiring errors. This means that reliability can be improved by eliminating short circuits and short circuits.

[Brief explanation of the drawing]

Figure 1 is a front view and plan view of the conventional product, Figure 2 is a detailed connection diagram of the spring terminal and cable terminal in Figure 1, and Figure 3 is a product with integrated flexible cable and support spring used in the present invention. 4 is a side view and a plan view of one embodiment of the present invention, and FIG. 5 is a sectional view of another embodiment of the present invention. Explanation of symbols, 1... Core part, 2... Support spring, 3.
...Support spring terminal, 4...Flexible cable, 6...
Connector, 8... Insulating film base, 9... Insulating film cover.

Claims (2)

[Scope of utility model registration request] (1) A floating type with a structure in which a core part is supported by a plurality of conductive spring strips arranged in the same plane, and the rear end of the spring strip is connected to a connector via a flexible cable. Facing the magnetic head, a plurality of conductive spring strips are formed on the surface of the flexible insulating film to be used as the above-mentioned flexible cable, and the front portions of these spring strips are connected to the 11 core portion. A magnetic head characterized in that it is used as a support spring to support the magnetic head. (2) Utility model registration In the magnetic head according to claim (1), the conductive spring strip of the flexible cable portion has a thickness such that the cable has a predetermined flexibility. A magnetic head characterized in that it is formed by controlled etching.