JP2005322462A - Micro coaxial cable and its assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrafine coaxial cable that can reduce a load applied to a cable, suppress occurrence of disconnection, and can be easily passed, for example, through a hole of a hinge portion of a portable device and an assembly of the cable.
An insulator 5 is provided on the outer periphery of a very thin center conductor 3, a laterally wound shield 7 made of an extremely thin outer conductor is provided on the outer periphery of the insulator 5, and further, the outer periphery of the laterally wound shield 7 is provided. An ultra-fine coaxial cable 11 configured by arranging a plurality of micro-coaxial wires 1 provided with an outer sheath 9 in parallel, arranged so that the winding directions of the side-winding shields alternate, and each left-handed and right-handed sideways The coiled shield 7A, 7B has a very fine coaxial cable 11 with almost the same twisting pitch. The microcoaxial cable 11 is used as a warp and woven with wefts to make it flat, or the microcoaxial cable 11 is bundled and stopped. It is stopped by a member.
[Selection] Figure 1

Description

  The present invention tends to improve the resolution of a liquid crystal screen used for a display unit in recent mobile phones, digital cameras, notebook computers, and the like, and a micro coaxial cable particularly used for a wiring material of the liquid crystal screen and its Related to cable assembly.

  For example, an FPC (flexible print circuit) has been mainly used so far as a wiring material for connecting a liquid crystal screen such as a mobile phone, a digital camera, and a notebook personal computer to a device body. For example, referring to FIG. 6, a notebook personal computer 101 and a mobile phone are composed of a device main body 103 and a liquid crystal monitor (LCD) 105 for storing a substrate, a mother board, etc., and the device main body 103 and the liquid crystal monitor (LCD) 105. Is provided to be foldable via a hinge portion 107.

  Conventionally, as shown in FIG. 6, a wiring material 109 used to send power and signals between the device main body 103 and a liquid crystal monitor (LCD) 105 crosses the hinge portion 107 in its axial direction. Wiring material 109 such as an FPC (flexible printed circuit) 113 or a shielded FPC, which is passed through a thin insertion hole 111 provided so as to be mostly used, is used.

  However, recently, for example, the form of a mobile phone has changed, and for example, a liquid crystal screen part that rotates or slides by 360 ° has appeared, and the conventional FPC wiring material 113 has such a mechanical bending. I can no longer withstand rotation. Further, as the resolution of the liquid crystal screen is improved, the influence of noise on the wiring material caused by the FPC cannot be ignored, and it is necessary to provide a shield.

  Therefore, there has been a movement to use a micro coaxial assembly as the wiring material 109 for the liquid crystal screen instead of the FPC. In addition, as for the ultrafine coaxial assembly, the wire size tends to be reduced with the miniaturization of the mobile phone.

For example, Patent Documents 1 and 2 are known as conventional micro coaxial cables and cable assemblies thereof. That is, in the conventional ultra-fine coaxial cable, an insulator is provided on the outer periphery of the ultra-fine center conductor, and a laterally wound shield made of an ultra-fine outer conductor is provided on the outer periphery of the insulator. Further, an outer skin is provided on the outer periphery of the horizontally wound shield. In a state in which a plurality of the micro coaxial cables are arranged in parallel, the micro coaxial cable assembly is configured by sticking the both surfaces of each micro coaxial cable with a tape in a flat shape. It is known that the winding directions of the laterally wound shields constituting the micro coaxial cable assembly are alternately arranged.
JP 2001-229742 A JP 2002-133951 A

  By the way, as described above, in order to manufacture the micro coaxial cable assembly, a plurality of micro coaxial cables are arranged in parallel, and are affixed to both surfaces of each micro coaxial cable with a tape in a flat shape. Moreover, since the winding directions of the horizontal winding shields are arranged alternately, they are suppressed from being bent due to the influence of twisting of individual cables, but this micro coaxial cable and micro coaxial cable assembly are High mechanical properties are required when used in a rotating hinge part of a portable device, but as the hinge part becomes smaller, the bending radius becomes smaller, the load on the micro coaxial cable becomes larger, and disconnection occurs. It is easy to do.

  The present invention has been made to solve the above-described problems.

  The ultrafine coaxial cable of the present invention is provided with an insulator on the outer periphery of a very thin center conductor, and a laterally wound shield made of an extremely thin outer conductor is provided on the outer periphery of the insulator. A micro coaxial cable constructed by arranging a plurality of micro coaxial cables arranged in parallel, wherein the winding directions of the horizontal winding shields are alternately arranged and each of the left winding and right winding horizontal winding shields The twist pitch is substantially the same.

  The micro coaxial cable of the present invention is characterized in that in the micro coaxial cable, the micro coaxial cable is used as a warp and woven with the warp and weft to be flat.

  A micro coaxial cable assembly according to the present invention is characterized in that the micro coaxial cables according to claim 1 or 2 are bundled and stopped at appropriate positions in the longitudinal direction of the micro coaxial cables by a stopper member. It is.

  As will be understood from the description of the means for solving the problems as described above, according to the present invention, the twist of the micro coaxial cable as a whole is prevented from occurring and smoothly straightened. Wiring is easy. In addition, the load applied to the micro coaxial cable can be reduced, and the occurrence of disconnection can be suppressed.

  The extra-fine coaxial cable is a warp and is woven with a weft to form a flat shape, so that it can be rounded. Also, the extra-fine coaxial cable is bundled into an appropriate number of locations in the longitudinal direction of the extra-fine coaxial cable. Since it is in a rounded state, it can be easily passed through, for example, a hole in a hinge portion of a portable device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  Referring to FIG. 2, an ultrafine coaxial line 1 is provided on the outer periphery of an ultrafine diameter central conductor 3 in which seven silver-plated copper alloy wires having a diameter of, for example, 0.025 mm are twisted at the center. An outer conductor formed by twisting 20 of a fluorine resin insulator 5 having a diameter of 0.20 mm, for example, and 20 tin-plated copper alloy wires having a diameter of 0.03 mm provided on the outer periphery of the insulator 5 And a sheath (jacket) 9 having an outer diameter of 0.30 mm made of, for example, a fluorine resin, which is coated on the outer periphery of the horizontally wound shield 7.

  As shown in FIG. 1, a plurality of the micro coaxial cables 1 are arranged in parallel to form a micro coaxial cable 11. In FIG. 1, the horizontal winding shield 7A and the left-hand horizontal winding shield 7B of the micro coaxial cable 1 constituting the micro coaxial cable 11 are alternately arranged in FIG. In addition, the twist pitches of the right-handed horizontal winding shield 7A and the left-handed horizontal winding shield 7B are wound at substantially the same, that is, the conventional horizontal winding shield is simply a right-handed horizontal winding shield and a left-handed horizontal winding shield. However, in this embodiment, the twist pitch of the right-handed horizontal winding shield 7A and the left-handed horizontal winding shield 7B is made as small as possible and substantially the same.

  As a result, the micro coaxial cable 11 as a whole is not twisted, and can be smoothly and easily installed in the device. Moreover, the load on the micro coaxial cable 1 can be reduced as compared with the conventional one, and the occurrence of disconnection can be suppressed.

  As shown in FIG. 3, the micro coaxial cable 1 is stretched in the warp direction (vertical direction in FIG. 3) in FIG. 3 to form warps, and a plurality of micro coaxial cables 1 are arranged at appropriate intervals in the weft direction. . Then, for example, a weft 13 made of polyester of thermoplastic fiber is woven by plain weaving, and the right end is sewn so that another thread 15 is not frayed by the needle 17, so that the micro coaxial cable 19 as shown in FIG. Is produced. A connector (not shown) is connected to both ends of the micro coaxial cable 19.

  As a result, the elongated fine coaxial cable 19 can be easily rolled up and down in FIG. 4 and becomes like a single round bar. For example, the hole of the hinge portion of the portable device has the fine coaxial cable 19 shown in FIG. It is possible to easily pass through even smaller ones.

  Further, as shown in FIG. 5, for example, 30 micro-coaxial cables 1 are bundled, for example, at appropriate positions in the longitudinal direction of the micro-coaxial cable 1, for example, an appropriate number of, for example, two stop members on both sides. It can be rounded by stopping with tape 21. Then, the bundled micro coaxial cable 19 is manufactured, and the connectors 23 and 25 are connected to both ends of the micro coaxial cable 19.

  As a result, since the micro coaxial cable 1 is bundled and fixed at a suitable number of locations in the longitudinal direction of the micro coaxial cable 1 with a tape 21 as a stop member, it is in a rounded state. It can be easily passed through the hole in the hinge part of the device.

  In addition, this invention is not limited to embodiment mentioned above, It can implement in another aspect by making an appropriate change.

It is a perspective view which shows an example of the micro coaxial cable of this invention. It is an expanded sectional view of a very fine coaxial line. It is explanatory drawing which showed the weaving method which manufactures the micro coaxial cable of this invention. It is a top view which shows an example of the micro coaxial cable manufactured by the weaving method of FIG. It is a top view which shows an example of the micro coaxial cable assembly of this invention. It is a perspective view of the notebook personal computer which shows the usage example of conventional FPC.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Micro coaxial cable 3 Center conductor 5 Insulator 7 Horizontal winding shield 7A Right-handed horizontal winding shield 7B Left-handed horizontal winding shield 9 Outer (jacket)
11 Fine Coaxial Cable, Warp 13 Weft 15 Yarn 17 Needle 19 Fine Coaxial Cable 21 Tape (Stopping Member)
23, 25 connector

Claims (3)

  An insulator is provided on the outer periphery of the ultra-thin center conductor, a laterally wound shield made of an extremely thin outer conductor is provided on the outer periphery of the insulator, and an extra-fine coaxial line having an outer skin provided on the outer periphery of the laterally wound shield is arranged in parallel. Are arranged in such a manner that the winding directions of the horizontal winding shields alternate, and the twist pitches of the left-handed and right-handed horizontal winding shields are substantially the same. Ultra-fine coaxial cable characterized by   2. The ultra-fine coaxial cable according to claim 1, wherein the ultra-fine coaxial cable is a warp, and is woven with the warp and the weft to form a flat shape. 3. The micro coaxial cable assembly according to claim 1, wherein the micro coaxial cable according to claim 1 or 2 is bundled and stopped by a stop member at an appropriate number of locations in the longitudinal direction of the micro coaxial cable.

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