JP2002184485A - Multi-core wiring member with connecting member and manufacturing method for multi-core wiring member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-core wiring member connectable directly to a connector as the mating party without installing any connector at the connecting ends of a number of coaxial electric wires and furnished with a connection piece which is in shield connection. SOLUTION: The multi-core wiring member is equipped with connection piece 2 connected with at least one-side ends of a number of coaxial electric wires 1, wherein the connection piece 2 is formed by joining a number of connecting conductors 3 onto a hard resin film 6 through a heat resistant resin film 5 in the specified arrangement pattern, and one-side ends of the connecting conductors 3 are exposed so that they touch the terminal of another connection piece to generate electric connection while the other ends are connected with the inner conductors 1a of the coaxial wires 1, and the outer conductors 1c of the coaxial wires 1 are put in common connections by a grounding bar conductor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core wiring member with a connecting portion used as a wiring material for information equipment products such as notebook personal computers, portable telephones, and medical equipment and electronic equipment products, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Electronic information devices, such as notebook personal computers and mobile phones, have been reduced in cost and cost.
Lightening is demanded. For wiring in these electronic information devices, a large number of signal lines are printed or taped as much as possible to reduce the wiring space and to simplify the assembly.

[0003] Connections with circuit components and printed circuits in the machine are usually made via a multi-terminal connector. The multi-terminal connector is provided on both the circuit component and the printed circuit side and the signal line side.For example, when a male connector is provided on the printed circuit side, a female connector is provided on the signal line side, and both connectors are provided. The electrical connection is formed by fitting.

[0004] A large number of signal lines to be wired inside the device can be reduced in wiring space by bundling the signal lines or arranging them in a line to form a tape. However, a multi-terminal connector requires insulation between terminals and a space between terminals for connection of electric wires, which limits the miniaturization of the connector. Therefore, as long as a wiring member using a connector is used for the internal wiring, there is a limit in reducing the space in the device, and it is difficult to significantly reduce the size of the electronic device itself.

Therefore, there is known a wiring member in which the male side of the connector is formed by a printed wiring board and a tape wire or the like is connected by soldering (for example, see Japanese Utility Model Application Laid-Open No. 53-133181). FIG. 11 is a view schematically showing the above-described wiring member, which is configured by connecting and fixing one end of a tape electric wire 23 to a printed wiring board 22. The printed wiring board 22 has a wiring conductor 22b formed on a rigid or flexible insulating substrate 22a, and one end of the conductor is connected to the connector connection portion 2a.
2c, and the other end of the conductor is a connection 22d with the tape wire 23. By using this wiring member,
It is possible to reduce the wiring space of an electronic device, reduce the weight, and the like.

[0006] However, multifunctional electronic information devices,
There is an increasing demand for higher functionality, and it is essential to prevent crosstalk between transmission signals. For this reason, coaxial electric wires having a shield conductor layer in the internal wiring are frequently used. When a coaxial electric wire is wired in a machine via a connector, the electric shield at the connector is easily broken. In the multi-terminal connector using the above-described printed wiring board, although the connector can be reduced in size, it is difficult to form an electrical shield structurally, and a sufficient shield connection cannot be performed.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can be directly connected to a mating connector without providing a connector at a connection end of a large number of coaxial wires, and is shielded. It is an object to provide a wiring member provided with a connection portion.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a multi-core wiring member with a connecting portion connected to at least one end of a large number of coaxial electric wires, wherein the connecting portion includes a plurality of connecting conductors having a predetermined shape. It is configured to be joined on a hard resin film via a heat-resistant resin film in an array pattern, and one end of the connection conductor is exposed so as to be in contact with the contact terminal of the other connection portion and to be electrically connected. The other end is connected to the inner conductor of the coaxial cable, and the outer conductors of many coaxial cables are commonly connected by a ground bar conductor.

Further, the present invention is a method for manufacturing a multi-core wiring member with a connecting portion, wherein a connecting portion is connected to at least one end of a large number of coaxial wires, wherein the connecting portion is formed by partially removing a strip-shaped conductor foil. After punching and leaving a portion where a large number of connection conductors are formed in a predetermined arrangement pattern, a heat-resistant resin film is joined to hold the arrangement pattern of the connection conductors, and thereafter, the hard resin film is joined and rigidified, and then The connecting portion is formed by punching out the connecting portion from the strip-shaped conductor foil, and one end of the connecting conductor is exposed so as to be in contact with the contact terminal of the other connecting portion to be electrically connected, and the other end of the coaxial electric wire. After the connection with the inner conductor, the outer conductors of a large number of coaxial wires are commonly connected by a ground bar conductor.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. 1A and 1B are diagrams showing an outline of a connecting portion, FIG. 1A is a plan view, FIG. 1B is a bb side view, and FIG. 1C is an enlarged view of a portion c. Note that in FIG. 1B, the thickness of components is partially exaggerated for clarity of the configuration. In the figure, 1 is a coaxial wire, 2 is a connection body, 3 is a connection conductor, 4,
Reference numeral 5 denotes a heat-resistant resin film, 6 denotes a hard resin film, 7 denotes a shield conductive layer, 8 denotes a ground bar conductor, and 9 denotes a punched hole. The coaxial cable 1 has a configuration in which the inner conductor 1a is covered with an insulator 1b, the outside is covered with an outer conductor 1c, and the outer surface is further covered with a jacket 1d made of a colored insulating material.

The connecting portion 2 is formed by holding and fixing the connecting conductor 3 to heat resistant resin films 4 and 5 such as a polyamide film and a polyimide film by heat fusion.
A rigid resin film 6 made of PET (polyethylene terephthalate) or the like is attached to the side to increase rigidity. Also, a conductive foil or the like is stuck on the outer surface of the hard resin film 6 to form the shield conductive layer 7, and the portion of the coaxial electric wire 1 from which the outer conductor 1 c has been removed is electrically shielded. Further, the outer conductor 1c of the coaxial cable 1 is commonly connected using a ground bar conductor 8, and the outside thereof is covered with a protective film or tape or the like (not shown) to be electrically insulated, and the coaxial cable 1 is connected. Detain in part 2.

A large number of connection conductors 3 are punched out from a conductive foil having good conductivity and plated with tin or solder, and are thermally fused to the heat-resistant resin film 4 or 5. The connection conductor 3 is formed in a parallel arrangement pattern corresponding to the arrangement pitch of the contact terminals of the mating connector to be connected. In order to obtain a good electrical connection with the contact terminal of the mating connector, the conductor width of the connection conductor 3 should be as large as possible. However, the arrangement pitch of the contact terminals on the connector side is small, and the space between the adjacent connection conductors 3 may not be sufficient on the wire connection side as it is. In such a case, as shown in FIG. 1C, the width of the conductor portion 3b on the electric wire connection side is reduced with respect to the conductor portion 3a on the connector connection side of the connection conductor 3 so that the signal conductor can be used for solder connection or the like. Ensure that necessary spacing and electrical insulation are obtained.

The connecting conductor 3 is connected to the common conductor portion 3c during the manufacturing process, and is bonded to the heat-resistant resin film 5 by heat fusion, and then partially connected with the heat-resistant resin film 5 as shown by a punched hole 9. And cut off from the common conductor portion 3c to form a signal conductor. The connection conductors that are commonly connected without being divided are used as conductors for ground connection or shielding. Although not shown in FIG. 1, the conductor portion 3a on the connector connection side is also connected to the common conductor portion 3c in the manufacturing process, and after the hard resin film 6 is attached, the respective conductor portions 3a are punched or the like. Is divided as

The inner conductor 1a of the coaxial cable 1 is made of an insulator 1b
Of the connection conductor 3 and is fixed to the conductor portion 3b of the connection conductor 3 by soldering or thermocompression bonding. The outer conductor 1c of the coaxial electric wire 1 is removed from the insulator 1b by a predetermined length for insulation from the inner conductor 1a. A large number of coaxial wires 1 are arranged in a line, and an end portion of the outer conductor 1 c is connected to the common conductor portion 3.
At the position c, it is suppressed by the ground bar conductor 8 at once. Both ends of the ground bar conductor 8 are connected and fixed to the common conductor portion 3c by soldering. Thereby, the outer conductor 1c of many coaxial wires
The ground connection can be formed by the common conductor portion 3c and the ground bar conductor 8. Further, by providing the grounding bar conductor 8 with a clamping function, the coupling force between the coaxial cable 1 and the connecting portion 2 can be increased. The outer jacket 1d of the coaxial electric wire is bonded and fixed to the heat-resistant resin film 5 with an adhesive.

FIG. 2 is a diagram showing another embodiment.
1 is different from the configuration shown in FIG. 1 only in that the arrangement pitch and the conductor width of the conductor portions 3a 'on the connector connection side are changed, and the other configuration is the same, so that detailed description is omitted. The connecting part 2 'in FIG. 2 opens the wiring pattern of the connecting conductor 3' in a fan shape at an intermediate portion, and makes the arrangement pitch of the conductor parts 3a on the connector connection side larger than the arrangement pitch of the conductor parts 3b 'on the electric wire connection side. I have. Further, the conductor width of the conductor portion 3a is made larger than the conductor width of the conductor portion 3b 'on the electric wire connection side so as to match the configuration of the contact terminal of the mating connector to be connected.

FIG. 3 shows a final form of the wiring member according to the present invention. After the connection between the connecting portion 2 and the many coaxial wires 1 is performed, the connection portion of the coaxial wire 1 and the ground bar conductor 8
Is covered with a protective film 20 so as to cover the portion, and an electrical insulation process is performed. A large number of coaxial electric wires 1 connected to the connection portion 2 are arranged in a line and taped or bound by a heat-shrinkable tube 21. FIG. 3 shows only one end of the coaxial cable, but the other end is connected to the connecting portion 2 in the same manner. In addition, the other end may be in a form for connecting a conventional connector or another form of connecting portion as necessary.

The connecting portion 2 constructed as described above is a very small edge type (male type) connecting portion having a width and a thickness when a large number of coaxial wires 1 are arranged in a line and taped. It can be formed as Therefore, FFC (flexible flat cable)
(Female-type) small connector used for connection for FPC (flexible print cable) or FPC (flexible printed cable) can be used, and wiring space can be reduced. In addition, wiring time in the equipment assembling process can be reduced, wiring can be performed without skill dependence, and high-quality assembly can be performed.

Next, a specific example of the connecting portion according to the present invention will be described with reference to a manufacturing flowchart shown in FIG. Details of each step of the manufacturing flow chart will be sequentially described with reference to FIGS. 5 to 10 showing respective manufacturing steps for the connection unit 2 shown in FIG.

Step S1 is a first stage for obtaining the connection conductors 3 described with reference to FIG. 1, in which a large number of connection conductors 3 are firstly punched in an array pattern having a uniform pitch. FIG.
FIG. 4 is a view showing this primary punching state, in which a strip-shaped conductive foil 11 is shown.
Is a copper foil having a thickness of 35 μm (another 50 μm or 100 μm is used), and the surface thereof is plated with 1 μm solder or tin. Strip conductor foil 1
Pilot holes 12 for intermittently transporting the strip-shaped conductor foil 11 are formed at predetermined intervals on both sides. The upper side of the strip-shaped conductor foil 11 shown in the figure is a connector connection side for forming a connection with a connector, the lower side is a wire connection side for connecting a coaxial wire, and the same applies to FIGS.

The conductor 3 on the connector side is used as the connection conductor 3.
Assuming that the width h1 of a is 0.35 mm and the arrangement pitch of the connection conductors is 0.5 mm, the interval h2 between the conductor portions 3a is 0.1
5 mm. On the other hand, the width h3 of the conductor 3b on the wire connection side is set to 0.2 mm, and the interval h4 of the conductors 3b is set to 0.3 in order to secure the interval for connecting the coaxial wires and the electrical insulation.
mm. The conductor width is changed at an intermediate position where the conductor portions 3a and 3b are substantially equal, but an appropriate position may be selected. In the step of FIG. 5, a slot hole 13 having a width h2 on the connector side and a width h4 on the wire connection side is punched.

In step S2, the connection conductor pattern is subjected to secondary punching in order to determine the number of connection conductors necessary for one connection portion and to unitize the connection conductor. FIG. 6 is a diagram showing this secondary punching state. One connecting conductor is punched out and removed for each required number of connecting conductors.
To form In the specific example of FIG. 6, the 23rd connection conductor is thinned out with 22 connection conductors as one unit.

In step S3, a heat resistant resin film is attached. FIG. 7 shows a state in which the heat-resistant resin films 4 and 5 are attached, and FIG.
(B) shows the back view. As shown in FIG. 7A, a heat-resistant resin film 4 having a width of about 3 mm is attached to the front side so as to cross the center of the connection conductor. A heat-resistant resin film 5 is attached to the back side shown in FIG. 7B so as to cover the entire surface of the connection conductor. As the heat-resistant resin films 4 and 5, a film made of a polyimide having a thickness of 25 μm and an adhesive layer having a thickness of 30 μm is used, and is joined to the connection conductor by heat fusion.

In step S4, tertiary punching for dividing the connection conductor into the signal conductor and the ground conductor is performed. FIG.
FIGS. 8A and 8B show the tertiary punching state, in which FIG. 8A is a front view and FIG. 8B is a back view. The connection conductor portion on the wire connection side is partially divided by the punched hole 9, the divided connection conductor is used for signal, and the undivided connection conductor is used for grounding.

In step S5, a hard resin film is stuck to harden the connecting portion. FIG. 8 shows a state in which a hard resin film is attached, and FIG.
(B) shows the back view. The hard resin film is divided into two parts, 6a and 6b. As shown in FIG. 9B, the hard resin film is separately attached to the connector connection side and the electric wire connection side from above the heat-resistant resin film 5 on the back side. . The hard resin film 6a is made rigid for attachment and detachment to and from the mating connector, and the hard resin film 6b is made rigid for forming and clamping the ground connection of the coaxial electric wire. The hard resin films 6a and 6b have a thickness of 188 μm or 15 μm.
A film made of PET having a thickness of 0 μm and an adhesive layer having a thickness of 30 μm is used, and is bonded to the heat-resistant resin film 5 by heat fusion. In addition, the hard resin film 6a and 6b
Needless to say, they may be formed as one piece without being divided into two pieces.

In step S6, the connection portion continuously formed on the strip-shaped conductor foil 11 is punched as a single piece into a predetermined shape. FIG. 10 is a diagram showing a punched state of the connecting portion body.
10A is a diagram showing a punching range, FIG. 10B is a front view after punching, and FIG. 10C is a back view after punching. The punching line is inserted so as to cross the slot hole 13 on the connector side, and is inserted so as to partially include the main body portion to which the slot hole 13 does not reach on the wire connection side. It is stamped into a shape. By this punching, the connection conductor on the connector side is cut off from the strip-shaped conductor foil 11 and divided into the signal and ground connection conductor 3 and the shield connection common conductor 3c.

The connection of the coaxial cable in step S7, the connection of the ground bar conductor in step S8, and the processing of the connecting portion in step S9 are the same as those described with reference to FIG. Further, the connecting portion 2 'shown in FIG. 2 is formed by a similar manufacturing method except that the shape of the connection conductor is different.

[0027]

As is apparent from the above description, according to the present invention, the connecting portion has a very small edge type (width and thickness when a large number of coaxial wires are arranged in a line and taped). Male) can be formed as a connection body. Therefore, the socket type (female type) used for the connection for the FFC (flexible flat cable) or FPC (flexible printed cable) to the mating connector
Can be used, and the wiring space can be reduced. In addition, since the outer conductors of a large number of coaxial wires are commonly connected by a ground bar conductor, shield connection can be effectively performed, and the coaxial wires can be clamped using the ground bar conductor. Is not required, the configuration can be simplified, and workability is good.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a view showing a final form of the wiring member of the present invention.

FIG. 4 is a view showing a manufacturing flow of a connecting portion body in the present invention.

FIG. 5 is a diagram showing a primary punched state of a connection conductor pattern according to the present invention.

FIG. 6 is a diagram showing a secondary punched state of the connection conductor pattern in the present invention.

FIG. 7 is a view showing a state in which a heat-resistant resin film according to the present invention is attached.

FIG. 8 is a diagram showing a tertiary punching state of the connection conductor pattern in the present invention.

FIG. 9 is a view showing a state in which a hard resin film according to the present invention is attached.

FIG. 10 is a diagram showing a punched state of a connector according to the present invention.

FIG. 11 is a view showing a conventional wiring member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Coaxial electric wire, 2 ... Connection part, 3 ... Connection conductor, 4, 5 ...
Heat-resistant resin film, 6: hard resin film, 7: shield conductive layer, 8: ground bar conductor, 9: punched hole.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // H01B 13/00 525 H01R 17/04 Q H01R 103: 00 23/02 K 107: 00 23/68 E F term (reference) 5E023 AA01 AA10 AA16 BB04 BB23 CC23 EE22 FF03 GG11 GG15 HH06 HH12 HH17 HH28 5E063 GA01 GA10 5E077 BB06 BB32 BB38 DD01 DD03 HH07 JJ16 JJ17 JJ21

Claims (6)

[Claims] 1. A multi-core wiring member with a connecting portion, wherein a connecting portion is connected to at least one end of a large number of coaxial wires, wherein said connecting portion is formed by forming a plurality of connecting conductors on a heat-resistant resin film in a predetermined arrangement pattern. One end of the connection conductor is exposed so as to be in contact with the contact terminal of the other connection portion to be electrically connected, and the other end is Connected to the inner conductor of the coaxial wire,
A multi-core wiring member with a connection portion, wherein the outer conductors of the plurality of coaxial wires are commonly connected by a ground bar conductor. 2. The multi-core wiring member with a connection part according to claim 1, wherein a shield conductor layer is provided on an outer surface of the hard film. 3. The conductor width of the other end of the connection conductor to which the electric wire is connected is formed to be narrower than the conductor width of the one end on the side electrically connected to another connection portion. The multi-core wiring member with a connecting portion according to claim 1 or 2, wherein 4. A conductor arrangement pitch of the one end on the side electrically connected to another connection portion of the connection conductor is larger than a conductor arrangement pitch on the other end on the side to which an electric wire is connected. 3. The device according to claim 1, wherein
5. A multi-core wiring member with a connection portion according to claim 1. 5. The method according to claim 1, wherein the heat-resistant resin film is formed of polyimide or polyamide, and the hard resin film is formed of polyethylene terephthalate (PET). Multi-core wiring member with connecting body. 6. A method for manufacturing a multi-core wiring member with a connection portion, wherein a connection portion is connected to at least one end of a large number of coaxial wires, wherein the connection portion is formed by partially punching a strip-shaped conductor foil. After leaving a portion where a large number of connection conductors are formed in the arrangement pattern, a heat-resistant resin film is joined to hold the arrangement pattern of the connection conductors, and then the hard resin film is joined to be rigid, and then the belt-like shape is formed. One end of the connection conductor is formed by stamping the connection portion from a conductive foil, and one end of the connection conductor is exposed to be in contact with a contact terminal of another connection portion to be electrically connected, and the other end is coaxial. A method for manufacturing a multi-core wiring member with a connection portion, wherein after connecting with an inner conductor of an electric wire, outer conductors of the plurality of coaxial wires are commonly connected by a ground bar conductor.