JP2015053194A - Multiconductor cable and method of producing multiconductor cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiconductor cable which keeps stability of impedance by reducing the removal length of e.g. a coating without enlargement of a connector and facilitates work of connecting one end of each wire to a connector.SOLUTION: A multiconductor cable 1 includes a plurality of wires 3, 5, 7 and 9 in which a coating 15, 17, 19 or 21 is removed in one longitudinal-direction end part to expose a core wire 23, 25, 27 or 29, a connector 11 having a plurality of core wire connection parts 31, 33 and 35 to which the core wire exposed in one longitudinal-direction end of the individual wires is connected and an insulation outer coat 13 which bundles the wires after connection of the individual wires to the individual core wire connection parts of the connector.

Description

  The present invention relates to a multi-core cable and a method for manufacturing the multi-core cable, and particularly relates to a cable in which a connector is provided at one end of a plurality of electric wires.

  Conventionally, a cable (connector installation cable) 201 as shown in FIG. 7 is known (see, for example, Patent Document 1). The cable 201 includes a signal line (electric wire) 203 and a connector 205. The signal line 203 includes a core wire 207, an inner covering body 209 covering the core wire 207, a shield conductor 211 covering the inner covering body 209, and an outer covering body 213 covering the shield conductor 211. Has been.

  The connector 205 includes an inner conductor insertion member 215, an outer conductor 217, an inner conductor 219, a core wire holding member 221, and a shell frame 223.

  In the cable 201, the inner conductor insertion member 215, the core wire holding member 221, and the shell frame 223 are installed inside the outer conductor 217, and the inner conductor 219 is installed in the inner conductor insertion member 215. The core wire 207 at one end in the longitudinal direction of the signal line 203 is connected to the inner conductor 219, and the shield conductor 211 at one end in the longitudinal direction of the signal line 203 is connected to the shell frame 223.

  Conventionally, a multicore cable (connector-installed multicore cable) 301 as shown in FIG. 8 is known (see, for example, Patent Document 2). The multi-core cable 301 includes a plurality of signal lines (electric wires) 303, a shield conductor 305 covering these signal lines 303, a covering 307 covering the shield conductor 305, and a connector 309.

  The connector 309 includes an inner housing 311 and a shell 313. The inner housing 311 is provided with a terminal portion 317 to which the core wire 315 of the signal line 303 is connected. Note that the core wire 315 of the signal line 303 is covered with the inner covering body 319.

  At one end in the longitudinal direction of each signal line 303, the inner cover 319 is removed to expose the core wire 315, and the cover 307 and the shield conductor 305 are removed to expose the signal line 303.

  The core wire 315 exposed at one end portion in the longitudinal direction of the signal line 303 is connected to the terminal portion 317 of the inner housing 311, one end portion in the longitudinal direction of the inner housing 311 and the shield conductor 305, and the length of the covering body 307. One end of the direction is covered with a shell 313. The shield conductor 305 and the shell 313 are electrically connected to each other.

Japanese Patent Laid-Open No. 2002-42987 JP 2012-160481 A

  Incidentally, in the cable 201 shown in FIG. 7, it is desirable that the length of removal of the shield conductor or the like is as short as possible in order to maintain the stability of the impedance.

  Further, in the multicore cable 301 shown in FIG. 8, in order to connect the signal line arranged inside the shield to the connector (terminal part), it is necessary to arrange each signal line according to the arrangement of the terminal part of the connector. There is. For this reason, the length of removal of the shield conductor and the covering is increased to some extent.

  However, in the case of a differential cable used for transmitting a signal having a frequency in the gigahertz band in particular, the length of removal of the shield conductor and the covering is set in order to maintain the stability of the impedance in the same manner as shown in FIG. It is required to make it as short as possible.

  That is, there is a contradiction between arranging each signal line in accordance with the arrangement of the terminal part of the connector and shortening the length of removal of the shield conductor etc., so that one end of each electric wire is connected to the terminal part. There is a problem that the workability when connecting to is poor.

  This will be described in more detail with reference to FIGS. A multicore cable 351 shown in FIG. 10 includes a multicore cable body 353 and a connector 355.

  The multi-core cable main body 353 includes a plurality of electric wires 357, a shield conductor 359 covering these electric wires, and an outer covering body 361 covering the shield conductor 359. The electric wire 357 includes a core wire 363 and a covering body 365 that covers the core wire 363.

  The connector 355 includes a metal shell 367, an inner housing 369 provided with a core wire connection portion 371, and a boot 373.

  When connecting the multi-core cable body 353 to the connector 355, as shown in FIG. 9, the coverings 361 and 365 and the shield conductor 359 are connected to a predetermined length L at one end in the longitudinal direction of the multi-core cable body 353. (Approx. 10 mm) is removed as appropriate. And according to arrangement | positioning of each core wire connection part 371 as shown in FIG. 10, each electric wire 357 is arranged, and each of the core wire 363 of each electric wire 357 is connected to each of each core wire connection part 371, respectively.

  However, it is difficult to arrange the electric wires 357 at a distance of only 10 mm as shown in FIG. 9, and workability when connecting one end of each electric wire to the connector is deteriorated.

  Therefore, the size of the connector 355 is increased (for example, the length of the metal shell 367 is increased), and the removal length of the coverings 361 and 365 and the shield conductor 359 is ensured to some extent to maintain impedance stability. However, it is conceivable to arrange the signal lines so that they can be easily connected to the connector, but it is desirable to avoid increasing the size of the connector as much as possible.

  The present invention has been made in view of the above problems, and without reducing the size of the connector, the removal length of the covering or the like is shortened to maintain stable impedance, and one end of each electric wire is connected to the connector. It is an object of the present invention to provide a multi-core cable and a method for manufacturing the multi-core cable that are easy to perform when connecting.

  According to the first aspect of the present invention, a plurality of electric wires in which the covering is removed at one end in the longitudinal direction and the core wire is exposed, and a core wire exposed at one end in the longitudinal direction of each electric wire are connected. A multi-core cable comprising: a connector having a plurality of core wire connection portions; and an insulating sheath that bundles the wires after the core wires of the wires are connected to the core wire connection portions of the connector. .

  The invention according to claim 2 is the multi-core cable according to claim 1, further comprising a shield conductor covering each of the electric wires, and the connector is connected to one end of the shield conductor in the longitudinal direction. A multi-core cable comprising: a metal shell that is provided; and an inner housing that is provided with the core wire connecting portion and is disposed on the metal shell, and wherein the insulating sheath covers the shield conductor It is.

  According to a third aspect of the present invention, there is provided a covering body removing step of removing a covering body at one end portion in the longitudinal direction of a plurality of electric wires to expose a core wire, and a core wire exposed by the covering body removing step comprising a plurality of connectors. A core wire connecting step of connecting to the core wire connecting portion, and an insulating sheath installation step of bundling the electric wires with an insulating sheath after connecting in the core wire connecting step.

  According to the present invention, without increasing the size of the connector, the removal length of the covering or the like is shortened to maintain the stability of the impedance, and the multi-core is easy to work when connecting one end of each electric wire to the connector. There is an effect that a cable can be provided.

It is a figure which shows the external appearance of the multicore cable which concerns on embodiment of this invention. It is a figure which shows the electric wire which comprises the multi-core cable which concerns on embodiment of this invention. It is a figure which shows the state in the middle of connecting the electric wire to the connector among the manufacturing processes of the multicore cable which concerns on embodiment of this invention. It is a figure which shows the state in the middle of installing the shield conductor in the electric wire among the manufacturing processes of the multicore cable which concerns on embodiment of this invention. It is a figure which shows the state in the middle of covering the shield conductor in the manufacturing process of the multi-core cable which concerns on embodiment of this invention with the insulation outer skin. In the multicore cable which concerns on embodiment of this invention, it is a figure which shows the state which installed the end part of the electric wire in the connector, installed the shield conductor, covered the shield conductor with the insulation outer cover, and installed the boot. It is a figure which shows the conventional cable. It is a figure which shows the conventional multicore cable. It is a figure which shows the conventional multicore cable. It is a figure which shows the conventional multicore cable.

  A multicore cable (connector installation cable; terminal installation cable) 1 according to an embodiment of the present invention is used as, for example, a cable for USB 3.0 (Universal Serial Bus 3.0). As shown, a plurality of electric wires 3, 5, 7, 9, a connector (terminal) 11, and an insulating sheath 13 are provided.

  As shown in FIG. 2 and the like, each of the electric wires 3, 5, 7, and 9 has the coverings 15, 17, 19, and 21 removed at one end portion in the longitudinal direction to expose the core wires 23, 25, 27, and 29. Yes. The removal of the coverings 15, 17, 19, and 21 is performed using a dedicated jig or equipment (not shown).

  The connector 11 includes a plurality of core wire connection portions 31, 33, and 35, and the core wires 23, 25, 27, and 29 exposed at one end in the longitudinal direction of each of the electric wires 3, 5, 7, and 9. Are connected to each of the core wire connecting portions 31, 33, 35, respectively.

  The insulating sheath 13 is connected to the core wire connecting portions 31, 33, 35 of the connector 11 in a state where the core wires 23, 25, 27, 29 of the electric wires 3, 5, 7, 9 are connected (each electric wire 3 , 5, 7 and 9 after connecting the core wires 23, 25, 27 and 29 to the core wire connecting portions 31, 33 and 35 of the connector 11, respectively, with the shield conductor 39 in between. 5 and 7 and 9 are bundled and covered.

  In the multicore cable 1, the core wires 23, 25, 27, and 29 of the electric wires 3, 5, 7, and 9 and the core wire connection portions 31, 33, and 35 are electrically connected to each other. On the other hand, the core wires 23, 25, 27, 29 and the core wire connecting portions 31, 33, 35 are insulated from each other. Moreover, in FIGS. 3-6, the display of the core wire connection part to which the core wire 29 of this electric wire 9 and the electric wire 9 is connected is abbreviate | omitted.

  The multicore cable 1 includes a shield conductor 39, and the shield conductor 39 covers the electric wires 3, 5, 7, and 9. The shield conductor 39 is connected to each core wire connection portion 31, 33, 35 of the connector 11 after each of the core wires 23, 25, 27, 29 of the respective wires 3, 5, 7, 9 is connected to each of the wire 3, Covers 5, 7, and 9.

  The connector 11 includes a metal shell 41 and an inner housing 43. One end of the shield conductor 39 in the longitudinal direction is connected to the metal shell 41. Core wire connection portions 31, 33, and 35 are provided in the inner housing 43, and the inner housing 43 is integrally installed on the metal shell 41 inside the metal shell 41. The metal shell 41 and the shield conductor 39 are electrically connected to each other, and the metal shell 41 and the core wires 23, 25, 27, 29 and the core wire connecting portions 31, 33, 35 are insulated from each other. It is in a conductive state.

  The insulating sheath 13 covers the shield conductor 39 by covering each of the electric wires 3, 5, 7, 9 with the shield conductor 39 and then wrapping around the shield conductor 39.

  Alternatively, the shield conductor 39 may be omitted, and the insulating outer sheath 13 may be wound around the electric wires 3, 5, 7, 9 to cover the electric wires 3, 5, 7, 9.

  Moreover, the insulation outer skin 13 is comprised with the insulating tape currently wound around the outer periphery of each electric wire 3, 5, 7, 9.

  Here, the multicore cable 1 will be described in more detail.

  As the electric wires 3, 5, 7, 9, for example, a power line 3, a GND line (ground line) 5, a shielded twisted pair cable (STP) 7 adjusted to a characteristic impedance of 90 ± 7Ω and a twisted pair cable (UTP) ; Unshielded Twisted Pair) 9 is employed.

  The power supply line 3 is composed of a core wire 23 and a covering 15. The core wire 23 is composed of, for example, a plurality of elongated strands of metal such as copper. The covering 15 is formed in, for example, an insulating synthetic resin into a cylindrical shape (for example, a cylindrical shape), and covers the core wire 23 from the vicinity of one end in the longitudinal direction of the core wire 23 to the other end of the core wire 23. Thereby, the core wire 23 is exposed at one end portion in the longitudinal direction of the signal line (between one end in the longitudinal direction of the core wire 23 and a portion slightly separated from the one end to the other end side in the longitudinal direction).

  The GND wire 5, the twisted pair cable 9, and the shielded twisted pair cable 7 include core wires 25, 27, and 29 and covering bodies 17, 19, and 21 and are configured in substantially the same manner as the power line 3. Note that the power supply line 3, the GND line 5, the twisted pair cable 9, and the shielded twisted pair cable 7 have flexibility.

  The metal shell 41 is formed in a cylindrical shape (for example, a rectangular cylindrical shape). The inner housing 43 includes an inner housing main body 45 and a plurality of core wire connectors 47.

  The inner housing main body 45 is made of an insulating material such as a synthetic resin, and each core wire connector 47 is made of a conductive material such as a metal and is provided integrally with the inner housing main body 45. ing. The core wire connection portions 31, 33, and 35 are formed at one end portions of the respective core wire connection bodies 47.

  The rigidity of the metal shell 41 and the inner housing 43 is higher than that of the electric wires 3, 5, 7, and 9, and the electric wires 3, 5, 7, and 9 are easily deformed by a force applied by a human finger or hand. On the other hand, the metal shell 41 and the inner housing 43 are hardly deformed.

  In a state where the inner housing 43 is installed on the metal shell 41, the inner housing 43 is positioned inside the metal shell 41 and the core wire connection portions 31, 33, and 35 are one ends of the metal shell 41 as shown in FIG. The other end of the core wire connector 47 is located at the other end side of the metal shell 41 (the other end side in the extending direction of the central axis of the metal shell 41). It is located on the left side in FIG. The central axis of the metal shell 41 connects the center of one rectangular opening of the cylindrical metal shell 41 and the center of the other rectangular opening of the cylindrical metal shell 41 to each other. It consists of straight lines.

  In the power supply line 3, the core wire 23 exposed at one end portion in the longitudinal direction is connected to one core wire connection portion 31 of the inner housing 43 by, for example, solder. In the state where the core wire 23 exposed at one end portion in the longitudinal direction of the power supply line 3 is connected to the core wire connection portion 31 of the inner housing 43 installed on the metal shell 41 (inner housing / core wire installation state), The core wire 23 exposed at one end portion in the longitudinal direction of the wire 3 is accommodated in the metal shell 41, and the power source wire 3 from which the covering 15 is not removed is one end of the metal shell 41 (right end in FIG. 3). It extends from.

  Similarly to the power supply line 3, the GND line 5 and the signal lines 7 and 9 are also connected to the core wire connection portions 33 and 35 of the inner housing 43 installed on the metal shell 41. The connection of each core wire 23, 25, 27, 29 to each of the core wire connection portions 31, 33, 35, instead of using solder, press contact, insertion after terminal crimping, ultrasonic waves, etc. Other connection methods may be used.

  The shield conductor 39 is formed in a circular shape or the like by knitting a metal wire such as copper (covered with a braided wire), and covers each of the electric wires 3, 5, 7, and 9, thereby Each of the electric wires 3, 5, 7, and 9 passes through the cylindrical shield conductor 39. The shield conductor 39 may be made of a metal foil, and the electric wires 3, 5, 7, 9 may be covered with the metal foil.

  As shown in FIG. 5, one end in the longitudinal direction of the shield conductor 39 is longer than one end in the longitudinal direction of the coverings 15, 17, 19, 21 of the wires 3, 5, 7, 9. 9 is located on the other end side in the longitudinal direction (right side in FIG. 5), but in a state where the inner housing / core wire is installed, the shield conductor 39 is further installed on the metal shell 41 (inner housing / core wire / shield). In the conductor installation state, one end of the shield conductor 39 in the longitudinal direction is located in the metal shell 41. The shield conductor 39 is folded at one end in the longitudinal direction, and the folded portion is located inside the metal shell 41.

  More specifically, when the inner housing, the core wire, and the shield conductor are installed, one side from the other opening (left end in FIG. 5) of the metal shell 41 in the extending direction of the central axis of the metal shell 41 inside the metal shell 41. Toward the opening (the right end in FIG. 5), one end in the longitudinal direction (the left end in FIG. 5) of the core wires 23, 25, 27, 29 of the wires 3, 5, 7, 9 and the wires 3, 5, 7, 9 One end (the left end in FIG. 5) in the longitudinal direction of the coverings 15, 17, 19, and 21 and one end in the longitudinal direction of the shield conductor 39 (the left end in FIG. 5) are arranged in this order.

  When the inner housing, the core wire, and the shield conductor are installed, the shield conductor 39 and the electric wires 3, 5, 7, and 9 are located on the right side of FIG. 5 from one opening (right end in FIG. 5) of the cylindrical metal shell 41. The shield conductor 39 is in contact with the metal shell 41 and is electrically connected to the metal shell 41, and the shield conductor 39 and the core wires 23, 25, 27, 29 of the electric wires 3, 5, 7, 9 are mutually connected. Is in a non-conducting state.

  The insulating tape 13 is formed in an elongated strip shape having a predetermined width, and an adhesive or an adhesive is applied to one surface in the thickness direction. In the state where the inner housing, the core wire, and the shield conductor are installed, the insulating tape 13 is spirally wound around the outer periphery of the shield conductor 39. Note that, at a portion where the insulating tape 13 is wound, the shield conductor 39 is covered with the insulating tape 13 and the shield conductor 39 is in an unexposed state.

  By installing the insulating tape 13, the shield conductor 39 is insulated from the outside, and noise mixing due to contact with the surroundings is prevented, and the shield conductor 39 is prevented from being damaged.

  Note that one end (left end in FIG. 5) of the insulating tape 13 around which the shield conductor 39 is wound is positioned at one opening (right end in FIG. 5) of the metal shell 41, for example.

  The multicore cable 1 is provided with a boot 49. The boot 49 is formed in a cylindrical shape with an insulator such as a synthetic resin having flexibility. In the state where the inner housing, the core wire, and the shield conductor are installed, the multi-core cable 1 is generated by installing the boot 49.

  The boot 49 is installed on the metal shell 41 and the insulating tape 13. More specifically, one side in the extending direction of the central axis of the cylindrical boot 49 covers the metal shell 41 so that one end of the metal shell 41 enters inside, and the central axis of the cylindrical boot 49 is The other side of the extending direction of the wire is such that the insulating tape 13 covering each of the electric wires 3, 5, 7, 9 and the shield conductor 39 enters inside (a part of the insulating tape 13 (beginning to extend from the metal shell 41). The metal shell 41 in the vicinity).

  Note that one side in the extending direction of the central axis of the cylindrical boot 49 may be installed on the metal shell 41 so as to be inside the one end of the metal shell 41.

  In the multi-core cable 1, the other end portion (left end portion in FIG. 6) of the metal shell 41 is inserted into a port of an information device such as a computer. Further, at the other end in the longitudinal direction of the multi-core cable 1, for example, as shown in FIG. 1, a connector 51 similar to the connector described above is installed.

  Next, the manufacturing procedure of the multicore cable 1 will be described.

  First, as shown in FIG. 2, the coverings 15, 17, 19, and 21 are removed at one longitudinal end of each of the electric wires 3, 5, 7, and 9 to expose the core wires 23, 25, 27, and 29.

  Subsequently, the core wires 23, 25, 27 of the electric wires 3, 5, 7, 9 are respectively connected to the core wire connection portions 31, 33, 35, such as connecting the core wire 23 of the power supply line 3 to the core wire connection portion 31 of the connector 11. , 29 are connected (see FIGS. 3 and 4).

  Subsequently, in order to reduce the influence of external noise, the electric wires 3, 5, 7, and 9 are covered with the shield conductor 39 (see FIGS. 4 and 5), the insulating tape 13 is wrapped around the shield conductor 39, and the boot 49 is installed. To do.

  According to the multi-core cable 1, the respective wires 3, 5, 7 that are not bundled or integrated with each other and are freely extended to each of the core wire connecting portions 31, 33, 35 of the connector 11. , 9 core wires 23, 25, 27, 29 are connected, and then the wires 3, 5, 7, 9 are bundled and covered together with the shield conductor 39 by the insulating sheath 13, thereby ensuring stability of impedance. Accordingly, the lengths of the coverings 15, 17, 19, 21 and the shield conductor 39 can be shortened and the connector 11 can be made larger without changing the size of the connector 11 according to the arrangement of the core wire connecting portions 31, 33, 35 of the connector 11. The electric wires 3, 5, 7, 9 are arranged, and the core wires 23, 25, 27, 29 of the electric wires 3, 5, 7, 9 are connected to the core wire connecting portions 31, 33, 35, respectively. It becomes easy. And the cost reduction of the multi-core cable 1 is made | formed by workability | operativity improving.

  Further, according to the multicore cable 1, when connecting each of the core wires 23, 25, 27, 29 of the electric wires 3, 5, 7, 9 that are not integrated with each other, to each of the core wire connection portions of the connector 11. Since the removal of the coverings 15, 17, 19, and 21 at one end in the longitudinal direction of each of the electric wires 3, 5, 7, and 9 can be performed independently for each of the electric wires 3, 5, 7, and 9. In addition to the improvement of difficult work in a limited space as in the prior art and the reduction of work time, the quality is expected to be stable.

  Moreover, according to the multi-core cable 1, since the shield conductor 39 covers each electric wire 3, 5, 7, 9 and is further connected to the metal shell 41, each electric wire 3, 5, 7, 9 extends over the entire length. It is covered with a shield conductor 39 and a metal shell 41, and the electric wires 3, 5, 7, and 9 are shielded over the entire length. Thereby, the influence of the external noise in each signal line 7 and 9 can be reduced.

  Moreover, according to the multicore cable 1, since the insulating sheath 13 is made of an insulating tape, it is easy to install the insulating sheath 13 on each electric wire. Moreover, it can respond flexibly even if the kind, number, and length of the electric wires 3, 5, 7, and 9 change.

  In the above description, the USB cable has been described as an example of the multicore cable. However, the present invention is not limited to this, and the configuration described above may be applied to other types of multicore cables.

  The multi-core cable includes a covering body removing step of removing the covering body at one end in the longitudinal direction of each of the plurality of electric wires to expose the core wire, and each of the core wires exposed in the covering body removing step of the connector. What was manufactured by the manufacturing method of the multi-core cable which has the core wire connection process connected to each of a plurality of core wire connection parts, and the insulation sheath installation process of bundling each electric wire with the insulation sheath after connecting by the core wire connection process It is an example.

DESCRIPTION OF SYMBOLS 1 Multi-core cable 3, 5, 7, 9 Electric wire 11 Connector 13 Insulation sheath 15, 17, 19, 21 Cover body 23, 25, 27, 29 Core wire 31, 33, 35 Core wire connection part 39 Shield conductor 41 Metal shell 43 Inner housing

Claims (3)

A plurality of wires in which the covering is removed at one end in the longitudinal direction and the core wire is exposed;
A connector having a plurality of core wire connection portions to which the core wires exposed at one end in the longitudinal direction of each electric wire are connected;
After the core wire of each electric wire is connected to each core wire connecting portion of the connector, an insulating sheath that bundles the electric wires, and
A multi-core cable characterized by comprising: The multi-core cable according to claim 1,
Comprising a shield conductor covering each of the electric wires,
The connector comprises a metal shell to which one end portion in the longitudinal direction of the shield conductor is connected, and an inner housing provided with the core wire connection portion and installed in the metal shell, The multi-core cable, wherein the insulating sheath covers the shield conductor. A covering removing step of removing the covering at one end in the longitudinal direction of the plurality of electric wires to expose the core wire;
A core wire connecting step of connecting the core wire exposed by the covering body removing step to a plurality of core wire connecting portions of the connector;
After the connection by the core wire connection step, the insulation outer shell installation step of bundling the electric wires by the insulating outer sheath,
A method for producing a multi-core cable, comprising:

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