JPS6229204A - Flat type electric wire - Google Patents

Abstract

PURPOSE:To obtain the titled wire where the thickness of a conductor is made thin, excellent flexibility and sliding service life are given and it is not easily broken against a tensile strength by arranging plural conductor stripes formed by laminating a reinforcement member to soft copper foil at an interval in parallel and providing a strip insulation layer in common to the conductors. CONSTITUTION:Plural stripes of conductors 1 formed by laminating the reinforcement member 3 to the soft copper foil 2 are arranged in parallel at an interval and the stripe insulation layer 4 is provided in common to the conductor 1. For example, a plastic reinforcement member 3 such as a polyester film is laminated, for example, to one side of the soft copper foil 2 to constitute the flat conductor 1. Plural stripes of the flat conductors 1 as above are arranged in parallel and the plastic film such as a polyester film is arranged along with them from the upper and lower side and they are laminated by melting to form an insulation layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flat electric wire used in sliding parts of printers, magnetic disk storage devices, and the like.

(Prior art and problems to be improved)
Wiring material 01, which has good flexibility and long sliding life, ie, is resistant to repeated bending fatigue, is used in sliding parts of printers, magnetic disk storage devices, etc. as shown in the figure. In the drawings, OD indicates a head rail, and 021 indicates a print head.

However, as electronic equipment becomes smaller, lighter, and especially lower in cost, customers are no longer satisfied with just the two points of flexibility and sliding life mentioned above. As a result, high-performance flat wires using flat conductors have become desired.

In other words, when multiple single-fiber wires are used, the wiring is troublesome, and care must be taken to avoid stress concentration in particular locations.Also, when flexible printed circuits are used, raw materials are expensive. Not only that, but the manufacturing method is complicated and it is quite expensive.

In addition, in the case of flat electric wires using ordinary flat conductors, it is necessary to reduce the thickness of the conductor to reduce bending stress.
There is a problem that the tensile strength decreases as the conductor becomes thinner, and the wire breaks when a tensile force is applied to the wire.

(Means for Solving the Problems) The present invention solves the above-mentioned problems and provides a flat electric wire that meets the needs of customers. Arrange multiple strips in parallel at intervals,
This is a flat electric wire in which a band-shaped insulating layer is commonly provided on these conductors.

(Example) FIG. 1 is a cross-sectional view of an example of the flat electric wire of the present invention.
) is a flat conductor constructed by laminating a plastic reinforcing material (3) such as a polyester film on one side of a mild steel foil (3). A plurality of strips of such flat conductors (+) are arranged in parallel, and a plastic film such as a polyester film is attached from above and below, and laminated by melting or the like to form a wire (2).

In the case of conventional mild steel foils that are not laminated with reinforcing material, if the thickness is less than 50 μm, the wires will break due to the tension applied when laminating the insulating layer, so the thickness was limited to 50 μm. In the case of conductors, it has become possible to reduce the thickness to 50 μm or less.

(Experiment example) Flat type 1 using the following three types of conductors! The wire was subjected to reciprocating sliding motion as shown in Figure 3 (a), and the number of times it took to break was measured. The results are shown in Figure 3 (b). It was confirmed that the laminated material was superior. Note that the conductor width was kept constant at 0.8 mm in all cases.

A: 100 μm mild steel foil B: 50 μm mild steel foil C; Invention product (30 JAm soft copper foil + IS μm plastic film) The results of measuring the tensile strength of the samples A to C above are as shown in Figure 4. It can be seen that although it is thin at 30 μm, its tensile strength is superior to that of conventional 100 μm mild steel foil.

(Effects of the Invention) According to the above-described flat electric wire of the present invention, since a reinforcing material laminated to a mild steel foil is used as a conductor, and the strength is given to the reinforcing material, the mild steel foil can be made extremely thin. . Due to this dimensional effect, a product with a long sliding life can be obtained, and also has the effect of being difficult to break even under tensile force.

[Brief explanation of drawings]

FIG. 1 shows a cross-sectional view of an embodiment of the flat electric wire of the present invention. FIG. 2 shows an explanatory diagram of the sliding section of the printer. FIG. 3(A) is an explanatory diagram of the sliding experiment, FIG. 3(B) is a characteristic diagram of the experimental results, and FIG. 4 is a characteristic diagram of the tensile strength test results. l... Conductor, 2... Mild steel foil, 3... Reinforcement material, 4...
...Insulating layer. Sai1 figure BC

Claims (1)

[Claims] (1) A flat electric wire characterized in that a plurality of conductors made of annealed copper foil laminated with a reinforcing material are arranged in parallel at intervals, and a strip-shaped insulating layer is commonly provided on these conductors.