JPS6313608Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shielded plastic multicore flat cable with improved peeling characteristics of the shield portion.

As shown in FIG. 1, cables in which a plurality of conductors 1 are integrally extruded with plastic insulators 2 or plastic films 2 are bonded together and formed into a flat shape have been widely used in recent years.

In order to provide this cable with an electrical shielding effect, a cable with metal foil 3 (for example, aluminum foil) bonded to one or both sides is used, as shown in FIG. This kind of cable is for connection,
The terminal portion is press-connected by a bulk press-connect type connector, but it is necessary to peel off the shield layer 3 at this portion.

It is desirable that the portion of the shield layer 3 that is peeled off or removed has the minimum necessary dimensions;
is a thin metal foil (e.g. 0.05 mm thick aluminum foil) and is well adhered to the plastic 2, making it difficult to remove as desired. In particular, it is extremely difficult to make the boundaries of the peeled parts straight.

If a straight cut is made in the shield layer 3 with a knife or the like, the separation boundary will be a straight line, but
This damages the plastic 2 (insulator) and causes problems such as poor insulation.

The purpose of the present invention is to provide a shielded flat cable in which the shield layer can be easily stripped off without causing the above-mentioned disadvantages, and the boundary of the peeled part is straight. In a flat cable with metal foil adhered to one or both sides, non-adhesive parts of the metal foil are provided at predetermined intervals along the length, and perforations are made in order to peel off the metal foil in the non-adhesive parts. Provide a thin part of
Alternatively, a tear string may be inserted.

Next, an embodiment according to the present invention will be explained with reference to FIG. 2.As explained in FIG. In the example by
At the same time, insert the metal foil 3 between the two perforations 4.
is not bonded to the plastic insulator 2. In such a flat cable with metal foil 3 adhered, when peeling the metal foil 3, the metal foil 3 can be easily peeled off by cutting from the perforation 4, and the perforation 4 can be placed in a direction perpendicular to the cable. If this is done, the cut surface of the metal foil 3 will be close to the connector mounting part and will be perfectly perpendicular, so that the shielding effect will be less likely to be impaired.

The aforementioned effects can also be obtained in other embodiments of the present invention described below.

That is, FIG. 3 shows a metal foil 3 in which locally thinner portions 5 are provided at regular intervals.

Further, as shown in Fig. 4, threads 6 (fibers, plastics, metal wires, etc.) for pulling the metal foil are embedded at regular intervals and both ends or one end thereof is exposed outside the metal foil 3 to facilitate pulling. It's fine if you did it.

In this case, there is a length that allows the metal foil 3 to be cut and peeled more easily.

The present invention described above provides the following effects regarding the shielded flat cable.

1. The shield peeling work becomes easier and the time required for the peeling work can be shortened.

2 No more damage to the cable when removing the shield.

3. The shield can be cut cleanly at right angles to the cable, making it easy to attach the connector, and the shielding effect is less likely to be impaired.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional shielded flat cable, Figure 2 is an explanatory diagram of an embodiment of the present invention in which perforations are made in the shield metal foil, and Figure 3 is a linearly thinner portion of the local thickness. FIG. 4 is an explanatory diagram showing an embodiment in which a linear material for cutting is embedded. 1... Conductor, 2... Insulator, 3... Shield metal foil, 4... Perforation, 5... Thin thickness part,
6... Linear material for cutting.

Claims (1)

[Scope of utility model registration request] In a plastic multicore flat cable with metal foil adhered to one or both sides, two perforations are made in the metal foil at regular intervals along the length of the cable in a direction perpendicular to the cable, or two thinner parts are made. 1. A shielded flat cable, characterized in that a shielded flat cable is provided with a wire or two cutting wires are embedded, and a metal foil portion between the two wires is configured to be non-adhesive to a plastic insulator.