JP2007280772A - Multicore cable, multicore cable with connector, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multicore cable capable of securing sufficient grounding performance even when the number of cores thereof is further increased; to provide a multicore cable with a connector; and to provide manufacturing methods of them. <P>SOLUTION: A plurality of coaxial cables 11 and an insulated cable 12 are arranged in parallel with one another, and external conductors 11c of the plurality of coaxial cables 11 and a center conductor 12a of the insulated cable 12 are conductively attached to common ground bars 15 and 16. The ground bars 15 and 16 are provided, at both ends thereof, with end grounding parts 15a, an intermediate grounding part comprising a ground pin 17 between the ground bar 15 and the center conductor 12a of the insulated cable 12 is arranged in a part other than both ends of the ground bar 15, and the ground pin 17 is conductively attached to the center conductor 12a and the ground bar 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a multi-core cable having a plurality of coaxial cables arranged in parallel, a multi-core cable with a connector, and a method for manufacturing them.

  In recent years, with the widespread use of notebook computers, mobile phones, small video cameras, and the like, in addition to miniaturization and weight reduction of these electronic devices, high speed and high image quality are required. To meet these requirements, extremely thin coaxial cables are used to connect the device main unit and the liquid crystal display, and wiring in the devices. Also, for ease of wiring, multiple coaxial cables are integrated together. A harness-shaped multi-core cable is used.

  A coaxial cable used for a multi-core cable is configured by sequentially arranging a central conductor, an inner insulator, an outer conductor, and a jacket from the inside in a coaxial manner. The central conductor is formed, for example, by twisting seven copper alloy wires, and the outer surface thereof is covered with an insulating material such as Teflon (registered trademark) resin to form an internal insulator.

  The outer conductor disposed on the outer peripheral surface of the inner insulator is formed by, for example, winding a copper alloy wire in a spiral shape with a horizontal winding, and by wrapping two polyester tapes on the outer surface, for example, and fusing them together. It is covered. In addition, the copper vapor-deposited tape may be wound around the outer surface of the outer conductor with the copper vapor-deposited surface inside, and the outer conductor may be wound in two layers with the winding direction of the copper alloy wire reversed. In addition, a braided structure may be used.

  A multi-core cable is formed by integrating a plurality of such coaxial cables, and the terminal portion of the multi-core cable is connected and fixed to a connector terminal, a substrate or the like having a predetermined pitch by conductive adhesion such as soldering. As such a multi-core cable, what is shown in FIG. 11 is known (for example, refer patent document 1).

  In FIG. 11, 1 is a coaxial cable, 1a is its central conductor, 1b is its internal insulator, 1c is its external conductor, 1d is its jacket, 2 is a ground bar for grounding, 3 is a connector terminal or FPC The connected member which consists of board | substrates, such as.

  In FIG. 11, the common ground bar 2 is integrated by soldering on the upper and lower surfaces (the lower surface side is not shown) of the outer conductors 1c of the plurality of coaxial cables 1 by terminal processing.

  The terminal-processed multi-core cable (coaxial cable 1 and ground bar 2) is connected and fixed to the connected member 3 by soldering. That is, the center conductor 1a of each coaxial cable 1 is soldered to the connected member 3 with the solder S1, and both ends of the ground bar 2 are soldered to the ground pattern of the connected member 3 with the solder S2.

JP 2005-180922 A

  By the way, as described above, electronic devices such as notebook computers, mobile phones, and small video cameras have been improved in performance, and the amount of information to be processed has increased. On the other hand, since there is a demand for reduction in size and weight, high-density mounting is also required for multi-core cables used in such electronic devices, and the number of cores per multi-core cable, that is, the number of coaxial cables increases. There is a tendency. For example, two multi-core cables having 20 cores are used, and one multi-core cable having 40 cores is used.

  However, when the number of cores of the multi-core cable is further increased in this way, the grounding performance near the center of the ground bar becomes unstable and the noise removal effect is insufficient, for example, by grounding at both ends of the ground bar. There was a possibility of becoming.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-core cable, a multi-core cable with a connector, and a method for manufacturing the same, which can ensure stable and sufficient grounding performance even if the number of cores is increased.

  The multi-core cable according to the present invention capable of solving the above-mentioned problems is a center conductor, an inner insulator disposed on the outer periphery thereof, an outer conductor disposed on the outer periphery of the inner insulator, and an outer periphery of the outer conductor. A plurality of coaxial cables having a jacket disposed on the central conductor and an insulated cable having a central conductor and a jacket disposed on the outer periphery thereof, and the outer conductors of the plurality of coaxial cables and The central conductor of the insulated cable is conductively bonded to a common ground bar, the ground bar has end grounding portions at both ends thereof, and the central conductor of the insulated cable is conductively bonded to the ground bar. An intermediate grounding portion is provided from the position.

In the multi-core cable according to the present invention, the intermediate ground portion is preferably a ground pin that is conductively bonded to the ground bar.
Alternatively, it is preferable that the intermediate ground portion is a center conductor of the insulated cable.

  In the multi-core cable according to the present invention, it is preferable that the outer diameters of the jackets of the plurality of coaxial cables and the outer diameters of the jackets of the insulated cables are equal.

  Further, the multi-core cable with a connector according to the present invention uses the multi-core cable according to the present invention, and a central conductor of the plurality of coaxial cables and the end grounding portion and the intermediate grounding portion are respectively connected to the connector. It is characterized by being.

  The manufacturing method of the multi-core cable according to the present invention that can solve the above-described problems includes a center conductor, an inner insulator disposed on the outer periphery thereof, an outer conductor disposed on the outer periphery of the inner insulator, and the outer conductor. A plurality of coaxial cables having a jacket disposed on the outer periphery of the conductor and an insulated cable having a central conductor and a jacket disposed on the outer periphery thereof are arranged in parallel, and the ends of the coaxial cable and the insulated cable The lead bars are exposed so that each part is exposed stepwise, and a ground bar having end grounding portions at both ends is conductively bonded to the outer conductor of the plurality of coaxial cables and the central conductor of the insulated cable. An intermediate grounding portion is provided from a position where the central conductor of the insulated cable is conductively bonded to the ground bar.

In the method for manufacturing a multi-core cable according to the present invention, the intermediate grounding portion is a ground pin that is conductively bonded to the ground bar, the ground pin is disposed on a central conductor of the insulated cable, and the ground It is preferable to conduct conductive bonding together with the bar.
In this case, the lead-out process includes a first step of cutting and removing the outer sheath of the plurality of coaxial cables and the outer sheath of the insulated cable, the outer conductor of the plurality of coaxial cables, and the central conductor of the insulated cable. It is preferable to have a second step of cutting and removing the third step and a third step of cutting and removing the inner insulators of the plurality of coaxial cables.

In the method for manufacturing a multi-core cable according to the present invention, the intermediate grounding portion is a central conductor of the insulated cable, and the central conductor of the insulated cable is connected to the ground bar with its tip protruding from the ground bar. Conductive bonding is preferable.
In this case, the lead-out process includes a first step of cutting and removing the outer cover of the plurality of coaxial cables and the outer cover of the insulated cable, and a second step of cutting and removing the outer conductors of the plurality of coaxial cables. And the third step of cutting and removing the internal insulators of the plurality of coaxial cables.

  Moreover, the manufacturing method of the multi-core cable with a connector according to the present invention includes a step of connecting a central conductor of the plurality of coaxial cables to the connector after performing the manufacturing method of the multi-core cable according to the present invention, And a step of connecting the partial grounding portion and the intermediate grounding portion to the connector.

  According to the present invention, the ground bar can be conductively bonded to the outer conductor of the coaxial cable and the center conductor of the insulated cable to ground the end ground portions at both ends, and the position where the center conductor of the insulated cable is conductively bonded. Since the grounding can be performed even at the intermediate grounding portion provided from the grounding point, grounding is possible not only at both ends of the ground bar but also at a position closer to the center, and the number of grounding points can be increased. Therefore, even if further increase in the number of cores is achieved, sufficient grounding performance can be stably secured.

Hereinafter, the example of embodiment of the multi-core cable which concerns on this invention, the multi-core cable with a connector, and those manufacturing methods is demonstrated.
(First embodiment)
First, the multi-core cable according to the first embodiment, the multi-core cable with connector, and the manufacturing method thereof will be described below with reference to FIGS.
The multi-core cable according to the present invention may take various forms, such as a connector attached to both ends, a case where only one end is attached, and the other end is connected to a substrate. In the core cable, the configuration on one end side will be described together with the manufacturing method.

  1 is a plan view showing a multi-core cable according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of a coaxial cable used for the multi-core cable, FIG. 3 is a cross-sectional view of an insulated cable used for the multi-core cable, 4 is a cross-sectional view taken along line BB in FIG. 1 showing a multi-core cable, FIG. 5 is a cross-sectional view taken along line CC in FIG. 1 showing a multi-core cable, and FIG. It is.

  As shown in FIG. 1, the multi-core cable 10 includes a plurality of (for example, 40) coaxial cables 11 of the same type and the same size, and a predetermined number (for example, one) of insulated cables 12, and these are They are arranged in parallel. Here, the insulated cable 12 is provided at a position where the plurality of coaxial cables 11 are equally divided or at a predetermined position in the vicinity thereof.

  As shown in FIG. 2, the coaxial cable 11 is arranged on the outer periphery of the center conductor 11a, the inner insulator 11b disposed on the outer periphery thereof, the outer conductor 11c disposed on the outer periphery of the inner insulator 11b, and the outer conductor 11c. An insulating outer cover 11d is provided, and these are arranged coaxially.

  As the coaxial cable 11, for example, a cable corresponding to the AWG 42 based on the standard of AWG (American Wire Gage) is used. In the coaxial cable 11 of the AWG 42, the central conductor 11a is formed by twisting seven strands 11a 'of tin-plated copper alloy having an outer diameter of 0.025 mm, for example. Further, the inner insulator 11b is made of a fluororesin such as PFA, which covers the outer peripheral surface of the central conductor 11a, and has an outer diameter of 0.17 mm. Further, the outer conductor 11c is formed to have an outer diameter of 0.23 mm by winding a strand 11c ′ of, for example, a tin-plated copper alloy having an outer diameter of 0.03 mm in a spiral manner around the outer peripheral surface of the inner insulator 11b. Yes. In addition, the outer cover 11d is made of a fluororesin such as PFA that covers the outer peripheral surface of the outer conductor 11c. In the case of the AWG 42, the outer cover 11d has an outer diameter of 0.31 mm. Further, a cable corresponding to the AWG 44 may be used.

  The end portion of the coaxial cable 11 is subjected to lead processing, and the center conductor 11a, the inner insulator 11b, and the outer conductor 11c are exposed in a predetermined length in order from the tip side.

  As shown in FIG. 3, the insulated cable 12 has a center conductor 12a and an insulating jacket 12b disposed on the outer periphery thereof, and these are arranged coaxially.

  For example, when the coaxial cable 11 has a size corresponding to the AWG 42, the insulated cable 12 is a cable corresponding to the AWG 36 according to the AWG standard, and the center conductor 12a has an outer diameter of 0.05 mm, for example. Seven strands 12a ′ of tin-plated copper alloy are twisted to form an outer diameter of 0.15 mm, and the jacket 12b is made of a fluororesin such as PFA covering the outer peripheral surface of the center conductor 12a. .31 mm. Here, the jacket 12 b of the insulated cable 12 is formed to have the same outer diameter as the jacket 11 d of the coaxial cable 11.

  The end portion of the insulated cable 12 is also subjected to lead processing, and the center conductor 12a is exposed to a predetermined length on the end side in the length direction.

  As shown in FIG. 4, the multi-core cable 10 includes two coaxial cables 11 and insulating cables 12 arranged in parallel, and two common outer conductors 11 c and center conductors 12 a that are aligned with each other. It is sandwiched between ground bars 15 and 16.

  These ground bars 15 and 16 have such a length that they can contact over the outer conductors 11c of all the coaxial cables 11 and the central conductors 12a of the insulated cables 12 that are in contact with each other or arranged in parallel at a predetermined interval. It is formed in a square plate shape with a constant thickness, and is formed from, for example, a conductive metal plate such as a copper plate.

  A ground pin 17 that constitutes an intermediate grounding portion is provided between the central conductor 12 a of the insulated cable 12 and the ground bar 15. As shown in FIG. 1, the ground pin 17 has a shape having a rectangular wide portion 17b wider than the linear portion 17a at one end in the length direction of the narrow linear portion 17a. The thickness is formed to 0.08 mm, for example. A ground pin 17 is provided so as to extend in the axial direction of the insulated cable 12 from a position where the central conductor 12 a of the insulated cable 12 is conductively bonded to the ground bar 15.

  A solder portion S10 is provided between the ground bars 15 and 16. The solder portion S10 allows the ground bars 15 and 16, the outer conductor 11c of all the coaxial cables 11, and the center conductor 12a of the insulated cable 12. The ground pin 17 is conductively bonded.

  As described above, the multi-core cable 10 in which the end portions are integrated and integrated is connected to the pair of grounded connected portions 30a provided on the connected member 30 and is positioned at both ends of the ground bars 15 and 16. The partial grounding portions 15a are soldered with the solder portions S11. In addition, the case where the to-be-connected member 30 is a board | substrate is shown here.

Further, as shown in FIG. 5, the multi-core cable 10 has a central conductor 11 a of the coaxial cable 11 that is appropriately bent, and corresponds to one of a plurality of connected portions 30 b provided on the connected member 30. Soldering is performed by the solder part S13.
Further, as shown in FIG. 6, the linear portion 17a of the ground pin 17 constituting the intermediate ground portion is also appropriately bent and soldered to the grounded connected portion 30c provided on the connected member 30 by the solder portion S14. Has been.

  When the connected member 30 is not a board but a connector, that is, when the multi-core cable 10 is a multi-core cable with a connector, as shown in FIG. A metal plate shell 18 is placed and soldered. In addition, a hole for introducing solder is provided on the upper surface of the shell 18, and solder is put from there to solder the shell 18 and the ground bar 15. The ground bar 15 is grounded by connecting both ends of the shell 18 to the grounded connection portion 30d of the connector.

Next, the manufacturing method of the said multi-core cable 10 is demonstrated with reference to FIG.
First, the coaxial cable 11 and the insulated cable 12 are processed. Note that the plurality of coaxial cables 11 and the insulated cables 12 are subjected to lead processing together.

  First, as shown in FIG. 8A, all the plurality of coaxial cables 11 and insulating cables 12 constituting the multi-core cable 10 are arranged in parallel and held by a jig or tape (not shown). However, the insulated cable 12 is disposed at a predetermined intermediate position other than both ends (holding step). At this time, the positions of the end portions of all the plurality of coaxial cables 11 and insulated cables 12 are matched. At this time, since the outer diameter of the outer sheath 11d of the plurality of coaxial cables 11 and the outer diameter of the outer sheath 12b of the insulated cable 12 are the same, when holding them at a constant pitch using a jig or the like. Holding becomes easy.

Then, the end portions of the plurality of coaxial cables 11 and the insulated cables 12 are subjected to an extraction process (an extraction process). This lead-out process is performed using a laser processing machine such as a YAG laser or a CO ₂ laser. First, as shown in FIG. 8B, a plurality of coaxial cables are adjusted by adjusting the wavelength and intensity of the CO ₂ laser. The outer cover 11d of 11 and the cover 12b of the insulated cable 12 are cut at the position X1, and the end side is pulled out and removed (first step).

  Next, as shown in FIG. 8C, the wavelength and intensity of the YAG laser are adjusted, and the outer conductor 11c of the plurality of coaxial cables 11 and the center conductor 12a of the insulated cable 12 are cut at the position of X2 to end portions. The external conductor on the side is pulled out and removed (second step). In this process, the lead-out process of the insulated cable 12 ends.

Thereafter, as shown in FIG. 8D, the wavelength and intensity of the CO ₂ laser are adjusted, the internal insulator 11b of the plurality of coaxial cables 11 is cut at the position X3, and the internal insulator on the end side is pulled out. Remove (third step). In this process, the lead-out process of the plurality of coaxial cables 11 is also completed. As described above, since the plurality of coaxial cables 11 and the insulated cables 12 are processed together, the lead-out process can be efficiently performed.

  When the holding step and the lead-out step are performed, the outer conductor 11c of all the coaxial cables 11 and the center conductor 12a of the insulated cable 12 are brought into contact with the ground bar 16, and the ground bar of the center conductor 12a of the insulated cable 12 is contacted. The ground pin 17 is brought into contact with the side opposite to 16 so that the wide portion 17 b is mainly in contact with the insulated cable 12. That is, the ground pin 17 serving as an intermediate grounding portion is disposed so as to extend in the axial direction of the insulated cable 12 from the position of the central conductor 12a of the insulated cable 12.

  Then, the ground bar 15 is brought into contact with the outer conductor 11c of all the coaxial cables 11 and mainly the wide portion 17b of the ground pin 17 provided on the center conductor 12a of the insulated cable 12 (a clamping process). Here, each of the ground bars 15 and 16 is provided with a solder layer formed by applying solder on one surface, and when sandwiching the outer conductor 11c, the center conductor 12a and the ground pin 17, Arrange with the layer side inside.

  Here, as described above, the outer diameter of the central conductor 12a of the insulated cable 12 is 0.15 mm and the thickness of the ground pin 17 is 0 with respect to 0.23 mm of the outer diameter of the coaxial cable 11 to the outer conductor 11c. Therefore, the height of the outer conductor 11c of the coaxial cable 11 and the height of the ground pin 17 disposed on the center conductor 12a of the insulated cable 12 match each other. Therefore, these can be favorably clamped by the ground bars 15 and 16. In addition, as long as these contact states are finally obtained, they may be contacted in any order.

  As described above, heating is performed via the ground bars 15 and 16 with the ground conductors 15 and 16 sandwiching the outer conductor 11c of all the coaxial cables 11, the center conductor 12a of the insulated cable 12, and the ground pin 17 (see FIG. Soldering process). Then, the solder layers of the ground bars 15 and 16 are melted, and the outer conductor 11c of all the coaxial cables 11 and the center conductor 12a of the insulated cable 12 are conductively bonded to the ground bars 15 and 16, and the ground bar 15 and the insulated cable are also bonded. The wide portion 17b of the ground pin 17 between the 12 central conductors 12a is conductively bonded.

  That is, when the solder layers of the ground bars 15 and 16 are melted and integrated, the solder portion S10 formed between the ground bars 15 and 16 becomes the ground bars 15 and 16, the external conductors 11c of all the coaxial cables 11, the insulated cables. The 12 center conductors 12a and the ground pins 17 are conductively bonded. Note that a solder layer may be formed on the side of the center conductor 12a of the insulated cable 12 in the wide portion 17b of the ground pin 17, and in this way, the conductive bonding by soldering between the center conductor 12a and the ground pin 17 is improved. can do.

In this way, the multi-core cable 10 whose ends are assembled and integrated is connected to the connected member 30 such as a connector terminal or a board such as an FPC as described above.
When connecting to the connected member 30 which is a substrate, first, the end grounding portions 15a located at both ends of the ground bars 15 and 16 are respectively soldered with the solder portions S11, and the grounded connected portions 30a are connected. Connect electrically.

  Then, the central conductor 11a of the coaxial cable 11 is appropriately bent and soldered to the corresponding connected parts 30b by the solder part S13, and the central conductor 11 and the connected part 30b are electrically connected. Further, the linear portion 17a of the ground pin 17 is appropriately bent and soldered to the grounded connected portion 30c by the solder portion S14, and the ground pin 17 and the grounded connected portion 30c are electrically connected.

  When the above connection state is finally reached, the step of connecting the end grounding portions 15a of the ground bars 15 and 16 to the pair of connected portions 30a, and the center conductors 11a of the plurality of coaxial cables 11 for grounding. The step of connecting to the other connected portion 30b and the step of connecting the ground pin 17 to the connected portion 30c for grounding may be performed in any order.

  When the connected member 30 is a connector, as shown in FIG. 7, a metal plate shell 18 is placed on one ground bar 15 and soldered. Then, the shell 18 is connected to the connected portion 30d for grounding the connector, and the ground bar 15 is grounded. Further, both end portions 15a and 16a of the ground bars 15 and 16 are soldered by the solder portion S15, and the both end portions 15a and 16a are electrically connected. Thereby, the multi-core cable 10 is in the form of a multi-core cable with a connector.

  Thus, according to the multi-core cable 10 according to the first embodiment, the ground bars 15 and 16 are conductively bonded to the outer conductor 11c of the coaxial cable 11, and the end grounding portions 15a at both ends thereof are connected to the solder portions S11. In addition, grounding is also performed by ground pins 17 that are provided at locations other than both ends of the ground bar 15 and are conductively bonded to the central conductor 12a of the insulated cable 12, so that the number of grounding locations can be increased. Therefore, even if the number of cores is further increased, sufficient grounding performance can be stably secured.

Furthermore, since the outer diameter of the jacket 11d of the plurality of coaxial cables 11 and the outer diameter of the jacket 12b of the insulated cable 12 are the same, holding is easy when holding them at a constant pitch using a jig or the like. It becomes.
In addition, if the above-described manufacturing method is used, the above multi-core cable 10 can be manufactured satisfactorily.

(Second Embodiment)
Next, the multi-core cable 10 according to the second embodiment will be described below with reference to FIGS. 9 and 10 focusing on differences from the first embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment, and the description is abbreviate | omitted.

  In the first embodiment, the number of ground locations is increased by using the ground pin 17 as the intermediate ground portion. However, in the second embodiment, the central conductor 12a of the insulated cable 12 is connected to the intermediate ground portion without using the ground pin 17. Used as That is, as shown in FIG. 9, the central conductor 12a of the insulated cable 12 is not cut, and the central conductor 12a extends in the axial direction of the insulated cable 12 from the ground bars 15 and 16 and protrudes. 12a is electrically bonded to the ground bars 15,16.

  In the multi-core cable 10 according to the second embodiment, it is preferable to use an insulated cable 12 in which the outer diameter of the central conductor 12a is equal to the outer diameter of the coaxial cable 11 to the outer conductor 11c.

  In the manufacturing method of the multi-core cable 10 in the second embodiment as described above, first, the above holding step is similarly performed. Thereafter, when the end portions of the plurality of coaxial cables 11 and the insulated cables 12 are subjected to the lead processing, in the second step, the YAG laser does not hit the center conductor 12a of the insulated cable 12 as shown in FIG. The outer conductor 11c of the coaxial cable 11 is cut with a YAG laser, and the outer conductor on the end side is pulled out and removed. Then, the insulated cable 12 is extended and arranged in the same row as the coaxial cable to the tip. Thereby, the end portion of the insulated cable 12 is in a state in which the outer sheath 12b having a predetermined length is removed, and the end of the central conductor 12a extends to the same position as the central conductors 11a of the plurality of coaxial cables 11. Become. The first step and the third step are performed in the same manner as in the first embodiment.

  Then, the outer conductor 11c of all the coaxial cables 11 and the central conductor 12a of the insulated cable 12 are brought into contact with the ground bar 16, and the outer conductor 11c of all the coaxial cables 11 and the center of the insulated cable 12 are brought into contact with the ground bar 15. The conductor 12a is brought into contact. At this time, the center conductor 12a of the insulated cable 12 has a tip projecting from the ground bars 15 and 16 in the axial direction of the insulated cable 12.

  Next, heating is performed through the ground bars 15 and 16 in a state where the outer conductors 11c of all the coaxial cables 11 and the center conductor 12a of the insulated cables 12 are sandwiched between the ground bars 15 and 16. Then, the solder layers of the ground bars 15 and 16 are melted, and the outer conductors 11c of all the coaxial cables 11 and the center conductor 12a of the insulated cables 12 are conductively bonded to the ground bars 15 and 16.

  In this way, the multi-core cable 10 of the second embodiment in which the end portions are assembled and integrated is similar to the first embodiment in that the ground bars 15 and 16 are connected to the pair of connected portions 30a of the connected member 30. The end grounding portions 15a and 16a are soldered by the solder portion S11, and the central conductors 11a of the plurality of coaxial cables 11 are appropriately bent and soldered to the corresponding one of the connected portions 30b by the solder portion S13. Will be. On the other hand, the central conductor 12a of the insulated cable 12 is also appropriately bent and soldered to the grounded connected portion 30c of the connected member 30 by the solder portion S14.

  According to the multi-core cable 10 according to the second embodiment described above, it is possible to ensure a sufficient grounding performance even if the multi-core cable 10 according to the first embodiment is further increased. In addition, since the intermediate grounding portion is formed by the central conductor 12a of the insulated cable 12, the number of parts can be reduced.

  In either of the first embodiment and the second embodiment, it is possible to perform conductive bonding with a conductive adhesive or the like instead of solder. Further, in any of the first embodiment and the second embodiment, the number of the insulated cables 12 may be plural instead of one, and in that case, the number of intermediate grounding portions is matched to the same number as the insulated cables 12.

It is a top view which shows the multi-core cable which concerns on 1st Embodiment of this invention. It is sectional drawing of the coaxial cable used for a multi-core cable. It is sectional drawing of the insulated cable used for a multi-core cable. It is BB sectional drawing of FIG. 1 which shows a multi-core cable. It is CC sectional drawing of FIG. 1 which shows a multi-core cable. It is DD sectional drawing of FIG. 1 which shows a multi-core cable. It is sectional drawing which shows the multicore cable with a connector. It is a top view which shows the lead-out process process in the manufacturing method of the multi-core cable which concerns on 1st Embodiment of this invention in order of (A)-(D). It is a top view which shows the multi-core cable which concerns on 2nd Embodiment of this invention. It is a top view which shows a part of opening process process in the manufacturing method of the multi-core cable which concerns on 2nd Embodiment of this invention. It is a top view which shows the conventional multi-core cable.

Explanation of symbols

10 Multi-core cable (Multi-core cable with connector)
11 coaxial cable 11a center conductor 11b inner insulator 11c outer conductor 11d jacket 12 insulated cable 12a center conductor (intermediate grounding portion)
12b Jacket 15,16 Ground bar 15a End grounding part 17 Ground pin (intermediate grounding part)
30 Connected member (connector)

Claims (11)

A plurality of coaxial cables having a central conductor, an inner insulator disposed on the outer periphery thereof, an outer conductor disposed on the outer periphery of the inner insulator, and a jacket disposed on the outer periphery of the outer conductor;
An insulated cable having a central conductor and an outer sheath disposed on the outer periphery thereof are arranged in parallel,
The outer conductor of the plurality of coaxial cables and the central conductor of the insulated cable are conductively bonded to a common ground bar,
The ground bar has end grounding portions at both ends thereof,
The multi-core cable is characterized in that an intermediate grounding portion is provided from a position where the central conductor of the insulated cable is conductively bonded to the ground bar. The multi-core cable according to claim 1,
The multi-core cable, wherein the intermediate grounding portion is a ground pin that is conductively bonded to the ground bar. The multi-core cable according to claim 1,
The multi-core cable, wherein the intermediate ground portion is a central conductor of the insulated cable. The multi-core cable according to any one of claims 1 to 3,
The multi-core cable, wherein an outer diameter of the outer cover of the plurality of coaxial cables is equal to an outer diameter of the outer cover of the insulated cable. Use the multi-core cable according to any one of claims 1 to 4,
A multi-core cable with a connector, wherein a center conductor of the plurality of coaxial cables and the end grounding portion and the intermediate grounding portion are connected to a connector, respectively. A plurality of coaxial cables having a central conductor, an inner insulator disposed on an outer periphery thereof, an outer conductor disposed on an outer periphery of the inner insulator, and an outer sheath disposed on the outer periphery of the outer conductor; And an insulated cable having a jacket disposed on the outer periphery thereof in parallel,
The end portions of the coaxial cable and the insulated cable are squeezed so that each part is exposed stepwise,
A ground bar having end grounding portions at both ends is conductively bonded to the outer conductor of the plurality of coaxial cables and the central conductor of the insulated cable, and the central conductor of the insulated cable is conductively bonded to the ground bar. A method for manufacturing a multi-core cable, characterized in that an intermediate grounding portion is provided from a position. It is a manufacturing method of the multi-core cable according to claim 6,
The intermediate grounding portion is a ground pin that is conductively bonded to the ground bar,
A method of manufacturing a multi-core cable, wherein the ground pin is disposed on a central conductor of the insulated cable and is conductively bonded together with the ground bar. It is a manufacturing method of the multi-core cable according to claim 7,
In the lead-out process, a first step of cutting and removing the outer sheath of the plurality of coaxial cables and the outer sheath of the insulated cable, and the outer conductor of the plurality of coaxial cables and the central conductor of the insulated cable are cut. And a third step of cutting and removing internal insulators of the plurality of coaxial cables. A method of manufacturing a multi-core cable, comprising: It is a manufacturing method of the multi-core cable according to claim 6,
The intermediate ground portion is a central conductor of the insulated cable,
A method of manufacturing a multi-core cable, characterized in that the central conductor of the insulated cable is conductively bonded to the ground bar in a state in which a distal end protrudes from the ground bar. It is a manufacturing method of the multi-core cable according to claim 9,
The lead-out process includes a first step of cutting and removing the jackets of the plurality of coaxial cables and the jacket of the insulated cables, and a second step of cutting and removing outer conductors of the plurality of coaxial cables. And a third step of cutting and removing the inner insulators of the plurality of coaxial cables. After implementing the manufacturing method of the multi-core cable as described in any one of Claims 6-10,
A method of manufacturing a multi-core cable with a connector, comprising: connecting a central conductor of the plurality of coaxial cables to a connector; and connecting the end grounding portion and the intermediate grounding portion to the connector.

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