JPS63207004A - Metal tape shielded wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pressure-welding connection of metal tape-shielded electric wires, more specifically, wires having a constant conductor spacing, such as in the case of a multi-core tape-shielded electric wire, for example, a two-core configuration. Regarding metal tape shielded electric wire suitable for.

In recent years, shielded wiring for television receivers, radio receivers, audio playback equipment, etc. has been used as a shielding material (shielding tape) to streamline the work.
As shown in the figure, a polymer film tape 1a and a metal tape 1b pasted together are used. Conventionally,
This shielding tape 1 is, for example, as shown in FIG.
The shield is used by being wrapped around an insulated wire 2, and the shield is wired by a drain wire 3 that contacts the metal tape 1b. That is, the insulated wire 2 is a conductor 2a.
and an insulator 2b, a shielding tape 1 is wound around the insulated wire 2, and a sheath 4 is coated thereon. In addition, if a multi-core conductor is required, as shown in Figure 13 (a) is an exploded view of the end, and (b) is an end view), a large number of electrical conductors 161A2 are tied together. A shielding tape 1 is wrapped around the metal tape 1b, and the wiring is connected by a drain wire 3 that contacts the metal tape 1b. Furthermore, for two-core shielded wires, the shielding tape 1 should be attached as shown in Fig. 14 (
(a) Figure is an exploded view of the end, Figure (b) is an end view), 2
There was one in which a book conductor 2 and a drain wire 3 were wound together, and another in which the drain wire 3 was inserted in the center and the conductors were spaced at an appropriate pitch as shown in FIG. In addition, as a method of streamlining connection methods, a pressure contact connection method is becoming increasingly popular in recent years. As shown in FIG. 16(b), this has a connecting contact pin 5 as shown in FIG. 16(a), and an electric wire 2 to be connected as shown in FIG.
16(d) by inserting it and pushing it firmly as shown in FIG. 16(c).

In the state shown in (e) and (f), a part of the insulation coating 2b is torn by the contact pin 5, and the conductor 2a comes into contact with the contact pin 5.

A large number of contact pins 5 are arranged at regular intervals and connected by a large number of electric wires having substantially the same intervals. Generally, the most commonly used pitches are 5mm, 2.5mm, and 2.0mm.

There are 1 mm, 25 mm, etc., and they are used depending on the use and purpose. On the other hand, for shielded wires, which are said to be particularly difficult to connect among wires to be pressure-welded, shield tapes made by laminating polymer films and metal tapes are used, but as shown in Figure 17, It is considered impossible to connect the shield 1 and the center conductor 2a by pressure contact directly on top of the tape because the shield 1 and the center conductor 2a will short-circuit. Therefore, when it is necessary to connect such shielded wires, for example, as shown in FIGS. 18 and 19, only the conductor or conductor 6 coated with conductive plastic is placed in the center, and The shielded wire has a structure in which insulated wires are arranged, and the sheath material and shielding material at the end of the cut surface are peeled off (Figure 18) and the exposed wire (Figure 19).
is used by inserting it into the contact pin 5 for pressure welding connection, as shown in FIG. As an advantage of this method, Shield 1! Automatically cuts and strips wires,
Since it is possible to attach a terminal connector for pressure welding connection, it is possible to save labor and reduce costs. In order to solve this problem, adhesive was applied to the metal surface of the shield tape, as shown in Figure 21, D,
As shown in Figure 2, there was a method of gluing metal surfaces together, but the adhesive acts not only on the metal surfaces but also on the insulator surface, causing the sheath material and shield at the end of the cut surface to peel off, causing the insulator and If an attempt is made to expose the conductor coated with conductive plastic, the shielding tape remains in close contact with the conductor, as shown in FIG. 23, making connection difficult. In this way, when shielding tape is used wrapped around it, it is difficult for the metal surfaces of the tape in the areas Dl and D in Fig. 21, that is, between the center conductor and the left and right insulators, to come into close contact with each other, so bending stress etc. are applied to the whole. In this case, as shown in Fig. 22, D-work.

The D2 portion is open, which deteriorates the shielding effect, and, for example, when a stereo signal is flowing through the left and right wires, there is a drawback that problems such as crosstalk occur. In order to solve this problem, there was a method of applying adhesive to the metal surface of the shield tape and bonding the metal surfaces of D and D2 together as shown in Fig. When attempting to peel off the sheath material and shield at the end of the cut surface to expose the insulator and conductive plastic-covered conductor, the shielding tape was stuck tightly as shown in Figure 23. I was left with
The drawback was that it was difficult to connect. Furthermore, if the adhesive 7 is provided on the metal surface of the shield tape in the longitudinal direction as shown in FIG. 24, the adhesive force may be slightly inferior because the metal tape 1b and the adhesive 7 are bonded in a later process. ,
Since the tape width is large, it is difficult to accurately place the adhesive portion at a desired position, and the adhesive portion hits the surface of the bonded material, making it difficult to peel off. It seems like it would be a good idea to apply a release agent to prevent this, but on the other hand, the entire circumference is a metal surface, which causes problems such as the area where the adhesive is not applied uniformly. The drawback was that accurate terminal processing was not possible.

The present invention was made in view of the above-mentioned circumstances.
In particular, this invention was made with the aim of solving the above-mentioned problems that occur when shielding two-core or multi-core electric wires using shield tape.

Structure FIG. 1 is a cross-sectional view for explaining one embodiment of the shielded wire according to the present invention, and parts having the same function are given the same reference numerals throughout.

As mentioned above, the conventional shielding tape is wound in two layers as shown in FIG. 21, but the shielding tape of the present invention is not wound in two layers as shown in FIG. Rather, both ends of the tape in the short diameter direction have a structure in which an insulated wire is wound around the circumference of the tape. The metal surface contacts the conductor coated with conductive plastic in the center, forming a drain wire for shielding. As shown in FIG. 2, the drain wire in the center may be constructed using only a conductor, but in that case, the strength may be slightly inferior when making pressure contact connections. In addition, as shown in Figure 3, wrapping the short-diameter end of the shield tape around the insulator by about 75% of its circumference can provide a shielding effect, but the sheath material and the insulator come into close contact, so the ends must be treated. Although some problems remain, some improvement can be made by applying a small amount of release agent. In this case, since the contact portion of the surface is not a metal surface all around, the complete removal does not result in development. In addition, as shown in Figure 4, the end of the short diameter of the shielding tape is wrapped around the insulator at 1 part of the circumference of the wire.
When it is wrapped around 00% or more, it has the highest shielding effect and is good in terms of the characteristics aimed at by the present invention. or,
As shown in Figure 5, when the ends of the shielding tape in the short diameter direction are wrapped around the insulator and the tapes overlap, it can be used for practical purposes if the overlapped portion is less than 50% of each of the widths of Dl and D2. be. Alternatively, a polymer film tape 1a and a metal tape 1b are pasted together as shown in FIG. 6, but an adhesive layer 8 is applied to the opposite side of the polymer film from the metal tape.

It may be configured as shown in FIG. Furthermore, as shown in Fig. 8, an adhesive layer is formed in stripes on the metal tape surface of the shielding tape shown in Fig. 6 in the longitudinal direction at width positions that do not contact the insulated wires or contact the conductor. 8, this shield tape may be used to construct the shield as shown in FIG.

10(a) is a cross-sectional view showing a typical example of a shielded wire according to the present invention, and FIG. 10(b) is a cross-sectional view showing an example of a shielded wire according to the prior art, where ■ is the top surface; ■ is the bottom surface, but the adhesion between the top and bottom surfaces is different from that of the conventional technology (Fig. 10).
In b)), the metal surfaces were bonded to each other and were weak, whereas in the present invention (Fig. 10(a)), the metal surfaces are molded with heated resin, so the adhesion is strong, and the top and bottom surfaces are separated. This is unlikely to occur, and the situation shown in FIG. 22 will not occur. Furthermore, when the adhesive layer 7 is applied to the opposite side of the polymer film to the metal surface as shown in FIG.
Since only a small amount of the shielding material remains at the end portion during the cutting sheath peeling operation (see FIG. 19) when processing the product, workability can be improved. Furthermore, the eighth
As shown in Figures 9 and 9, when an adhesive layer is provided in stripes on a metal surface, the upper and lower surfaces of the sheath material and tape are completely adhered (see Figure 10 (, )), and the adhesive effect is increases. However, in this case, although there is a risk that the tape may swing left or right and become misaligned, the tape width is narrower than conventional tapes, so it can be set to a desired position relatively easily.

[Brief explanation of the drawing]

1 to 6 are cross-sectional views for explaining embodiments of the shielded wire according to the present invention, FIG. 7 is a diagram showing an example of the shield tape used in carrying out the present invention, and FIG.
The figures are a sectional view showing an example of a shielded wire using the shielding tape shown in FIG. 7, FIG. 8 is a diagram showing another example of a shielded wire used in carrying out the present invention, and FIG. 8 is a sectional view showing an example of a shielded wire using the shielded tape wire shown in FIG. 8, and FIG.
((b) figure) Cross-sectional view for explaining the difference from the 11th
The figure shows an example of a conventional shielding tape, FIGS. 12 to 15 each show an example of a conventional shielded wire, and FIG. 16 shows an example of a conventional shielded wire fixing operation. 17 is a diagram showing a fixed state of a contact pin and a shielded wire, FIG. 18 is a diagram showing an example of a sheath, and FIG. 19 is a diagram for explaining an example of a conventional terminal treatment of a shielded wire. , FIG. 20 is a diagram showing an example of a fixed state, FIGS. 21 to 23 are diagrams for explaining an example of a conventional shielded wire, and FIG. 24 is a diagram showing an example of a shielding tape. 1... Shield tape, la... Polymer film. 1b...Metal tape, 2...Insulated wire, 2a...
conductor. 2b...Insulator, 3...Drain wire, 4...
sheath. 5... Contact pin, 6... Conductor, 7... Adhesive. 8...Adhesive layer. Ward Ward - to Castle Ko Ward Ward Ward r, -) Dimensions 0 (Jaku Figure 10 (a) Figure 11 Figure 13 @ Figure 14 @ Figure 21 Figure 22 Procedure Ne ID Seiko F March 27, 1988 Commissioner of the Japanese Patent Office Kuro 1) Mr. Yu Akira■, Indication of the case 1986 Patent Application No. 40688 2 Name of the invention Metal tape shield electric wire 3 Relationship with the case by the person making the amendment Patent applicant Address of Setagayaku Okusawa 5-28-16 Okusawa, Setagaya-ku, Tokyo Taishoden Kikogyo Name: Daisho Electric Industry Co., Ltd. Sakai Tadashi Representative: Tadashi Sakai 4, Agent address: 1-2-7 Furocho, Naka-ku, Yokohama, 231 Japan
Shear Train Yokohama No. 807 Voluntary Issue 6, Subject of Amendment 7, Contents of Amendment (1), and Claims of the Specification are amended as shown in the attached sheet. (2) "Such a problem... there was a drawback" stated on page 5, line 13 to page 6, line 2 of the specification.
Delete. (3), “D-engineering, D2-no” stated on page 6, line 12 of the same
is corrected to "as shown by Dl and D2". (4) "On the surface of the insulating material" written in the fourth line of page 7 is corrected to "on the surface of the insulating material." Claim (1): A conductor or a conductor whose surface is coated with a conductive polymer material is arranged in the center, and insulated wires are arranged on the left and right to sandwich the conductor in the center. A tape in which an insulating tape and a metal tape are bonded together, or an adhesive is applied to the insulating tape surface of the tape, or an adhesive is applied to the insulating tape surface of the tape and the longitudinal length of the metal surface of the tape is A tape coated with adhesive in a width and position that does not touch the kite 42 or a conductor is applied so that the metal tape surface at both ends of the tape in the short diameter direction % or more, and its ends should not protrude between the center conductor and the left and right insulators by more than 50% of the distance between the center conductor and the insulators, and the wire should be placed in the center. A metal tape shielded electric wire with a two-core parallel drain wire, characterized in that the tape is arranged so that the surface of the conductor and the metal tape surface are in contact with each other, and the entire surface is covered with an insulating material. (2) Claim No. (1) characterized in that the insulated wire portion uses a plurality of wires each having a substantially round shape.
Metal tape-shielded electric wire with multi-core drain wire as described in .

Claims (2)

[Claims] (1) With a conductor or a conductor whose surface is coated with a conductive polymer material placed in the center, and insulated wires placed on the left and right to sandwich the conductor in the center, A tape made by laminating an insulating tape and a metal tape, or an adhesive is applied to the insulating tape surface of the tape, or an adhesive is applied to the insulating tape surface of the tape and an insulated power source is applied in the longitudinal direction of the metal surface of the tape. The tape is coated with adhesive in a width and position that does not touch the electrical conductor and does not touch the electrical conductor, so that the metal tape surfaces at both ends of the tape in the short diameter direction cover 75% or more of the circumference of the insulated wire. The surface of the conductor arranged in the center should be wrapped around the center conductor and the left and right insulators so that its ends do not protrude more than 50% of the distance between the center conductor and the insulators. A metal tape shield electric wire with a two-core parallel drain wire, characterized in that the tape is arranged so that the metal tape surface is in contact with the metal tape surface, and the whole is covered with an insulating material. (2) Claim No. (1) characterized in that the insulated wire portion uses a plurality of wires each having a substantially round shape.
Metal tape-shielded electric wire with multi-core drain wire as described in .