JPH02223108A - Shield cable - Google Patents

Abstract

PURPOSE:To keep conductor core wires at a constant interval even when an insulating outer film and a shield conductor are peeled and easily press them to a pressure terminal such as a connector by extending an insulating inner film between many conductor core wires, and holding the conductor core wires at a uniform interval with it. CONSTITUTION:Many conductor core wires 11-16 arranged at a uniform interval in parallel with each other in a plane shape and an insulating inner film 17 which is extended between them and holds these many conductor core wires 11-16 at a uniform interval and covers the periphery of other conductor core wires 12-16 except the conductor core wire 11 at one end among these many conductor core wires 11-16 are provided. A shield conductor 18 covering the periphery and an insulating outer film 19 covering this periphery are provided. Even when the insulating outer film 19 and the shield conductor are peeled, the intervals between the conductor core wires are kept constant, and the pressure connection to a connector is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shielded cable in which the periphery of an electric wire is covered with a shielding conductor.

(Prior Art) Conventionally, as a means of connecting a signal transmission wire and a connector, due to the demand for ease of connection, a pressure contact terminal is provided in the connector, and the wire is press-fitted into the opening of the pressure contact terminal, thereby connecting the wire and the connector. Means is used to electrically connect the wires and to hold the wires using the pressure contact terminals. Furthermore, conventionally, in order to prevent noise from entering during signal transmission, shielded cables in which signal transmission wires are shielded have been used. When press-fitting the electric wire inside the shielded cable to the insulation displacement terminal of the connector, the shield around the wire is removed before the wire is press-fitted, so one of the wires inside the shielded cable is electrically connected to the surrounding shield. By press-fitting the wire into the insulation displacement terminal, the shield of the cable and the shield of the connector are electrically integrated to prevent noise from entering.

Furthermore, the shielded cable is not only connected at its end to the connector, but may also be press-connected to the connector in the middle of the shielded cable.

FIGS. 3A and 3B are a sectional view and a perspective view, respectively, of an example of a conventional shielded cable used for such purposes (Utility Model Application Publication No. 50-98264). Moreover, FIG. 4 is a perspective view showing an example of a press-contact terminal of a connector to which the core wire of this cable is press-contacted.

In Figures 3A and 3B, the five core wires 2 of the cable
The four core wires, excluding core wire 2' at one end, are covered with insulating inner sheath 3.
covered in. On the other hand, the core wire 2' at one end is covered with a conductive inner sheath 4. These five core wires are their inner sheath 3
, 4 are covered from above with a shielding conductive foil 5, and further covered with an insulating jacket 6 on the outside. To press each core wire 2, 2' of this cable 1 to the connector,
The insulating outer sheath 6 and shielding conductive foil 5 are removed from the part of the cable 1 to be press-contacted (not necessarily the end), leaving only the inner sheath 3.4 and the core wires 2, 2', and in this state the press-contact terminal 7 of the connector is removed. The opening of? a (Fig. 4), the inner jacket 3.4
is split, and the core wire 2.2' is electrically connected to the pressure contact terminal 7. In addition, the cable shield (conductive foil for shielding 5
) is connected to the connector via the conductive inner sheath 4 and the core wire 2'.

(Problems to be Solved by the Invention) Usually, the pressure contact terminals 7 of the connector are arranged so as to have the same pitch as the pitch of the core wires 2, 2'. on the other hand,
As mentioned above, the core wires 2 and 2' are connected to the pressure contact terminal 7 of the connector.
In order to make pressure contact with the wire, it is necessary to peel off the insulating jacket 6 and the shielding conductive foil 5. Since the cable 1 is usually flexible for convenience of handling, if the inner sheaths 3 and 4 are exposed, the inner sheath 3 and 4 and the core wires 2 and 2' alone have more flexibility. There is a problem in that it is difficult to maintain a constant spacing between the core wires 2, 2', and therefore it is difficult to press them even if the pressure contact terminals 7 are arranged to match the spacing of the core wires 2.degree. 2'.

In view of this problem, the present invention has been developed so that even if the outer sheath and the shielding conductor are peeled off at any position, one of the many core wires is electrically connected to the shielding conductor, and the core wires are arranged at regular intervals. The purpose is to provide a shielded cable that can be protected.

(Means for Solving the Problems) The shielded cable of the present invention includes a large number of conductor core wires arranged parallel to each other and at equal intervals in a plane, and a number of conductor core wires that extend between these many conductor core wires. an insulating inner sheath that holds the conductor core wires at equal intervals and covers the other conductor core wires except for the conductor core wire at one end of the large number of conductor core wires; It is characterized by comprising a shielding conductor surrounding the shielding conductor and an insulating jacket covering the shielding conductor.

(Function) In the shielded cable of the present invention, the conductor core wire at one end is not covered with an insulating inner sheath and is in contact with the shielding conductor. The body core wire and the shielding conductor are electrically connected. In addition, since the insulating inner sheath extends between all conductor core wires, including the conductor core wires that are electrically connected to this shielding conductor, even if the insulating outer sheath and shielding conductor are peeled off. The distance between the conductor core wires is kept constant. Note that the conductor core wire at one end that is electrically connected to the shielding conductor is not covered with the insulating inner sheath, but the other conductor core wires are held at regular intervals by the insulating inner sheath.
The conductor core wires at one end are also maintained at sufficiently constant intervals.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a cross section of a cable according to an embodiment of the present invention.

In the cable 10, six conductor core wires 11 to 16 are arranged parallel to each other and at equal intervals in a plane. These core wires 1
Other core wires 12 excluding core wire 11 at one end among 1 to 16
16 are covered with an insulating inner jacket 7. Also, this inner cover 7
extend between each core wire 11-16 so that these core wires are kept equidistant from each other. Note that this inner sheath 7 is connected to the core wire 1
1, and the core wires 11 are also arranged at equal intervals. These core wires 11 to 16 and inner sheath 17 are covered with an aluminum coating film 18 for shielding.

The core wire 11 is in contact with the film 18 along its extending direction, and the core wire 11 is also maintained at the same potential as the film 1B. The periphery of the film 18 is covered with an insulating jacket 19.

Even if the insulating inner sheath 17 and the core wires 11 are exposed by peeling off the insulating outer sheath I9 and the film 18 at an arbitrary position of this cable 10, the distance between the many core wires 11 to IB is maintained, so that the insulation displacement terminal It can be easily press-fitted into the open lower a of No. 7 (see Fig. 4).

Furthermore, if perforations are made in the film 18 of this cable 10 at predetermined intervals in a direction perpendicular to its length, it is possible to tear the film 1B along the perforations after peeling off the insulating jacket 19. It is convenient.

FIGS. 2A and 2B are a side sectional view and a perspective view showing the inside of another embodiment of the cable, respectively.

This cable 20 includes a core wire 21, an inner sheath 22, two aluminum coating films 23 and 24, and an outer sheath 25.
It is composed of. Also, these two films 23.
24 is provided with perforations 23a and 24a at predetermined intervals in the length direction of the cable 20, and the perforations of the two films 23 and 24 are slightly shifted so as not to overlap each other.

If perforations are provided in the film 18 in the embodiment shown in FIG. 1, there is a risk that noise will be mixed in from the perforations in an environment where strong noise exists, but in the embodiment shown in FIGS. 2A and 2B, Now, by stacking two films and shifting the positions of the perforations from each other, noise can be prevented from entering, and after peeling off a part of the outer cover 25, as shown in Fig. 2B, By peeling off the film 23, 34 at the portion where the outer sheath 25 has been peeled off, any part of the electric wire (core wire and inner sheath) of this cable 20 can be easily exposed.

Incidentally, in each of the above embodiments, an aluminum coating film is used as the shielding conductor, but it goes without saying that the shielding conductor of the present invention is not limited to this.

In addition, it is also possible to make perforations in the shielding conductor as explained in the embodiment of FIG.
As explained in the example shown in the figure, overlapping two shielding conductors and providing perforations at positions slightly shifted from each other applies not only to cables where the distance between the core wires is fixed by the inner jacket, but also to the core wires and the The present invention can also be applied to a shielded cable that is made of a core wire and an inner sheath that surrounds one or a plurality of independent wires.

(Effects of the Invention) As explained in detail above, in the shielded cable of the present invention, the insulating inner sheath extends between a large number of conductive core wires and holds the large number of conductive core wires at equal intervals. Even if the insulating jacket and the shielding conductor are peeled off, the conductor core wires can be maintained at a constant interval, and therefore can be easily press-connected to a press-contact terminal such as a connector.

In addition, in the shielded cable of the present invention, since the conductor core wire at one end is not covered with an insulating inner sheath and is in contact with the shielding conductor along its length, the shielded cable can be insulated at any position on the shielded cable. Even if the outer sheath and the shielding conductor are peeled off, the conductor core wire at one end and the shielding conductor are maintained at the same potential.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the cable of the present invention, and FIGS. 2A and 2B are a side sectional view and a perspective view showing the inside of other embodiments of the cable of the present invention, respectively. , FIG. 3A and FIG. 3B are a sectional view and a perspective view, respectively, of an example of a conventional shielded cable, and FIG. 4 is a perspective view showing an example of a pressure contact terminal of a connector to which a core wire of a shielded cable is pressure-connected. . 1, 10.20... Shield cable 2, 2',
11 to 18.21 Core wire 3.17.22 Insulating inner sheath 4 Conductive inner sheath 5 Conductive foil for shielding 6 Insulating outer sheath 7 Pressure contact terminal
7a...Openings 18, 23.24...Shielding films 23a, 24a...Perforations of the pressure contact terminals, Figure 2A

Claims (1)

[Claims] A large number of conductor core wires arranged parallel to each other and at equal intervals in a plane, and a wire extending between these many conductor core wires to hold these many conductor core wires at equal intervals, and one of these conductor core wires. an insulating inner sheath that covers the conductor core wires other than the conductor core wire at the end of the conductor core wire, a shielding conductor that covers the periphery of the plurality of conductor core wires and the insulating inner sheath, and the surroundings of the shielding conductor. A shielded cable characterized by comprising an insulating jacket covering the cable.