JPS6345706A - Round signal cable - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a round signal cable, and in particular to a flat cable used for connections within and between electronic devices.
This invention relates to a round signal cable formed into a round shape.

[Background of the invention]

In recent years, as electronic equipment has become smaller and lighter, it has become a means of rationalizing wiring, mounting, and maintenance inspection work.
Wiring materials tend to become flat. Flat cables meet these requirements, and are made by arranging a plurality of conductors in a flat shape in parallel, insulating them, and fusion-bonding them in the radial direction. Flat cables have many advantages, including improved packaging density, ease of maintenance and inspection without worrying about incorrect wiring, and the ability to use one-touch connectors to reduce the number of terminal processing steps.

However, such flat cables are also used to connect electronic devices, and when the installation route for cable trays, ducts, conduits, etc. Wiring is difficult. In addition, flat cables are formed by directly extruding or coating an insulating coating on a conductor, and the insulating coating also serves as a jacket. For this reason, flat cables have disadvantages such as poor impact resistance and friction resistance, and are easily damaged during the installation or wiring process.

- There is also a multi-core coaxial cable for connecting force quantum devices, but this is made by twisting multiple conductors and inserting them into a circular jacket, and has advantages and disadvantages opposite to those of the flat cable.

[Purpose of the invention]

The present invention has been made in view of the above points, and has the advantages of flat cables such as easy differentiation of wiring and reduction of the number of man-hours required for terminal processing, compatibility with complex installation routes, and impact resistance. It is an object of the present invention to provide a round signal cable that has the advantages of a circular cable such as excellent friction resistance and excellent abrasion resistance.

[Summary of the invention]

In order to achieve the above object, the present invention is characterized in that a flat cable is folded into a 99-fold shape, and the periphery of the folded flat cable is covered with an insulating jacket to form a round shape. It is characterized by

[Embodiments] Hereinafter, preferred embodiments of the round signal cable according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the process of forming a round signal cable according to a first embodiment of the present invention and the entire structure. Figure 1 (D
) is a perspective view of a round signal cable 10, and the round signal cable 10 is composed of a flat cable 12, an inclusion 14 that covers the flat cable 12, and a jacket 16 formed around the inclusion 14. ing.

As shown in FIG. 1(A), the flat cable 12 has a plurality of conductors 18 arranged flat and in parallel, and an insulator 20 such as Teflon (FEP) extruded onto the conductors 18. covered by law. In the flat cable 12, a plurality of conductors 18 are connected in the radial direction by an insulator 20. The flat cable 12 is then regularly folded into a 99-fold shape in the radial direction of the conductor 18 as shown in FIG. 1(B), and later in the extending direction as shown in FIG. 1(C). It is gently worn out. As shown in FIG. 1(D), the periphery of the tied flat cable 12 is covered with an inclusion 14, and the flat cable 12 is covered with an inclusion 14.
2 and the inclusion 14 have a circular cross-sectional shape. An insulating jacket 16 made of polyvinyl chloride (PVC) or the like is formed around the inclusion 14. That is, the first
The round signal cable 10 according to the embodiment is constructed by using the flat cable 12 as described above in FIG. 1 (A) → (B) - (C
)-(D>).

Next, the operation of the round signal cable according to the first embodiment constructed as described above will be explained. The round signal cable 10 has both ends spread out into a fan shape, and is connected to an electronic device or the like directly or via a one-touch connector, and is used for transmission between the electronic devices.

Incidentally, the round signal cable 10 is also used to connect devices disposed within electronic equipment.

In this case, since the round signal cable 10 has the flat cable 12 provided therein, when both ends are expanded into a fan shape, the conductors 18 become parallel. Therefore, the conductors 18 can be easily distinguished, there is no fear of incorrect wiring, and a one-touch connector or the like can be used, reducing the number of steps required for terminal processing.

Further, since the round signal cable 10 has a round shape like a coaxial cable, it can be bent freely in the entire circumferential direction, and can be applied to installation routes with complicated shapes.

Further, in the round signal cable 10, the conductors 18 are covered with the jacket 16 via the insulator 20 and the inclusion 14, so that the conductors 18 are protected from external impact and friction, and are not damaged. .

Next, in FIG. 2, a round signal cable 2 according to a second embodiment is shown.
In the following drawings, the same members as those of the round signal cable 10 of the first embodiment shown in FIG. A round signal cable 22 of the second embodiment has a conductive shield 24 disposed between the inclusion 14 and the jacket 16 in the round signal cable 10 of FIG.

The conductive shield 24 is formed into a rope shape as shown in FIG. 2, and covers the periphery of the inclusion 14. Shield electrical signals. Furthermore, by grounding one end or both ends of the conductive shield 24, the capacitance between the conductors 18 wired in the same path is reduced, and the conductors 18 and
...Since mutual electrostatic induction is reduced, harmful electrically induced signals are effectively shielded.

Therefore, the round signal cable 22 of the second embodiment has a conductor 1
Conductive shield 24 prevents harmful electrical signals induced into 8...
Since the round signal cable 22 is shielded by the round signal cable 22, it is possible to prevent noise from entering the equipment connected to the round signal cable 22.

In the second embodiment, instead of the net-like conductive shield 24, a tape-shaped conductive shield 24 made of aluminum foil or the like may be wound around the inclusion 14 as shown in FIG. good. Furthermore, in the second embodiment, when the flat cable 12 is folded, a conductive shield 26 may be interposed between each layer of the folded flat cable 12 as shown in FIG. In this case, since the conductive shields 24 and 26 are double-configured for the conductors 18...
Harmful electrical signals induced in conductors can be reliably shielded.

〔Effect of the invention〕

As explained above, the round signal cable according to the present invention is made into a round shape by folding the flat cable into ninety-nine folds and forming a jacket around it, so it combines the advantages of the flat cable and the round cable. The wires can be easily distinguished, the number of man-hours required for terminal processing can be reduced, and the conductor can be bent freely in the radial direction to be applied to complicated wiring routes. It has excellent impact resistance and abrasion resistance.

[Brief explanation of drawings]

FIGS. 1(A) to (C) are perspective views of a flat cable showing the process of forming a round signal cable according to the first embodiment of the present invention, and FIG. 1(D) is a perspective view of the same round signal cable. , FIG. 2 is a perspective view of a round signal cable according to the second embodiment, and FIGS. 3 and 4 are perspective views of round signal cables showing modifications of the second embodiment. 10.22...Round signal cable, 12...Flat cable, 16...Jacket, 18
...Conductor, 20...Insulator.

Claims (2)

[Claims] (1) A round signal cable characterized in that a flat cable is folded into a ninety-nine fold shape and the periphery of the folded flat cable is covered with an insulating jacket to form a round shape. (2) A round signal cable according to claim 1, characterized in that a conductive shield is disposed between the inclusion and the jacket to shield harmful electrical induction signals induced in the conductor. .