KR101173785B1 - A coaxial cable harness - Google Patents

Abstract

Provides high density mounted coaxial cable harnesses while ensuring good electrical properties. The coaxial cable harness 10 includes a relay board 21 to which a plurality of coaxial cables 11 are connected, and a plurality of signal line parts 32 and a ground wire part 33 are arranged on the relay board 21, and the coaxial At the end opposite to the side connected to the cable 11, the signal line part 32 and the grounding wire part 33 are arranged at equal intervals P, and the signal line part at the end of the side connected to the coaxial cable 11 ( 32 and the distance between the ground wire part 33, unlike the equal interval P, the number of signal line parts 32 is m, the number of ground wire parts 33 is n, and the number of coaxial cables 11 is c. When m ≤ c <m + n, the signal line portions 32 are connected to the center conductors 12 of one coaxial cable 11, respectively, and at least one ground line portion 33 is the center conductor 12. The diameter of at least one of the coaxial cables 11 connected to the at least one external conductor 14 and connected to the signal line part 32 is larger than the above equal interval P without being connected to).

Description

Coaxial Cable Harness {A COAXIAL CABLE HARNESS}

The present invention relates to a coaxial cable harness in which a plurality of coaxial cables are connected to a relay substrate.

Background Art In recent years, with the spread of notebook computers, mobile phones, small video cameras, and the like, miniaturization and weight reduction of such electronic devices have been required to increase the speed and quality. Therefore, an extremely thin coaxial cable is used for the connection of the apparatus main body and the liquid crystal display, the wiring in the apparatus, and the like. Further, for ease of wiring, coaxial cable harnesses in which a plurality of coaxial cables are collectively integrated are used. The terminal part of such a coaxial cable harness is connected and fixed to a connector terminal, a board | substrate, etc. by electroconductive bonding, such as soldering.

As a cable for connecting between devices and inside of a device, the thing of the structure which has a connector part in the edge part of the flat cable member for balanced transmission is known (for example, refer patent document 1). The cable member has a configuration in which paired signal transmission paths and ground portions are alternately arranged and balanced transmission is possible, and a pair of signal terminal and ground terminal portions are exposed at the ends. The connector portion is provided at an end portion of the flat cable member for balanced transmission, and the signal terminal portion itself and the ground terminal portion itself of the flat cable member for balanced transmission are used as the terminal portions.

There is also a harness shape in which a plurality of extremely thin coaxial cables are collectively integrated. In this type of cable, a plurality of coaxial cables and an insulated cable are arranged in parallel, and an outer conductor and the insulated cable of the plurality of coaxial cables. Some conductors are electrically conductively bonded to a common ground bar (see Patent Document 2, for example).

Japanese Patent Laid-Open No. 2006-73367 Japanese Patent Publication No. 2007-280772

In addition to miniaturization and weight reduction, electronic devices are being further improved in performance, thereby increasing the amount of information to be processed. For this reason, further improvement of electrical characteristics, such as a transmission characteristic and a noise characteristic, in the terminal of a harness is desired, when connecting a some coaxial cable to harness shape and connecting it with the board | substrate of an apparatus via a relay board.

It is therefore an object of the present invention to provide a high density mounted coaxial cable harness while ensuring good electrical properties.

Coaxial cable harness according to the present invention that can solve the above problems, the inner conductor disposed on the outer circumference of the center conductor, the outer conductor disposed on the outer circumference of the inner insulator and the outer shell disposed on the outer circumference of the outer conductor A coaxial cable harness having a plurality of coaxial cables, and a relay board to which at least one end of the plurality of coaxial cables is connected, wherein the plurality of signal line parts and a plurality of ground wire parts are arranged on the relay board, and connected to the coaxial cable. The signal line portion and the ground line portion are arranged at equal intervals P at the end opposite to the side of the side, and the distance between the signal line portion and the ground line portion at the end of the side connected to the coaxial cable is equal to that of the other end. Unlike the spacing P, the number of signal lines is m, the number of ground lines is n, and the number of coaxial cables is c. Where m < c &lt; m + n, wherein the signal line portions are each connected to one central conductor of the coaxial cable, and all or at least one of the ground lines are all or at least one of which is not connected to the center conductor. The diameter of at least one of the coaxial cables connected to the external conductor and connected to the signal line portion is larger than the equal interval P.

In the coaxial cable harness of the present invention, it is preferable that both ends of at least one of the signal line portion and the ground line portion are bent so as to be different positions in the width direction of the relay substrate.

In the coaxial cable harness of the present invention, it is preferable that the ground line portion adjacent to the bent signal line portion is changed in width in accordance with the bending of the bent signal line portion.

Further, in the coaxial cable harness of the present invention, the coaxial cable has one end portion of the signal line portion and the ground line portion evenly arranged, a central conductor of the coaxial cable is connected to the signal line portion, and the other end of the coaxial cable It is preferable that the outer conductor or the center conductor of the coaxial cable is connected, the arrangement pitch of the coaxial cable is equal, and the arrangement pitch of the coaxial cable is larger than the arrangement pitch of the signal line portion and the ground line portion.

Moreover, in the coaxial cable harness of the present invention, it is preferable that a plurality of said ground wire parts are connected, and this connection part becomes a connection part connected with the outer conductor of the said coaxial cable.

Moreover, in the coaxial cable harness of this invention, it is preferable that the outer conductor of all the coaxial cables is connected to the said connection part.

According to the present invention, since one or more ground wire portions are connected to the outer conductor without being connected to the center conductor of the coaxial cable, the number of coaxial cables for connecting and grounding the center conductor to the ground wire portion can be reduced. On the side connected to the coaxial cable, the distance between the signal line part and the ground line part is equally spaced (P) because the number of coaxial cables is smaller than the total number of signal line parts and the ground line part, unlike the equal interval P on the opposite side. A coaxial cable having a diameter larger than that of the side can be used, and the diameter of at least one of the coaxial cables connected to the signal line portion is larger than the equal interval P. FIG. By reducing the number of coaxial cables, a coaxial cable connected to the signal line portion having a large diameter of the center conductor can be used, and electrical characteristics such as transmission characteristics and noise characteristics can be greatly improved. That is, according to the present invention, a coaxial cable harness mounted with high density can be obtained while ensuring good electrical characteristics, and it is possible to satisfactorily cope with an increase in the amount of information accompanied by further high performance of electronic equipment.

1 is a cross-sectional view of a coaxial cable used in the coaxial cable harness according to the present invention;
2 is a plan view showing one end side of a coaxial cable harness (first example) according to the present invention;
3 is a schematic diagram showing the arrangement of a coaxial cable in a relay board of a coaxial cable harness according to the present invention;
4 is a plan view showing one end side of a coaxial cable harness (second example) according to the present invention;
5 is a plan view showing one end side of a coaxial cable harness (third example) according to the present invention;
6 is a plan view showing one end side of a coaxial cable harness (fourth example) according to the present invention;
7 is a plan view showing one end side of a coaxial cable harness (a fifth example) according to the present invention;
8 is a plan view showing one end side of a coaxial cable harness (sixth example) according to the present invention;
9 is a plan view showing one end side of a coaxial cable harness (seventh example) according to the present invention;

Hereinafter, the example of embodiment of the coaxial cable harness which concerns on this invention is demonstrated. The coaxial cable harness according to the present invention may take various forms, such as when both ends are connected to the relay board, or only one end is connected to the relay board and the other end is attached to the connector. The connected structure is demonstrated.

As shown in FIG. 1, the coaxial cable 11 constituting the coaxial cable harness includes a center conductor 12, an inner insulator 13 arranged on the outer circumference of the center conductor 12, and an outer circumference of the inner insulator 13. It has the outer conductor 14 arrange | positioned and the insulating outer shell 15 arrange | positioned at the outer periphery of the outer conductor 14, These are arrange | positioned and arrange | positioned in coaxial shape.

In the present invention, the thickness of the coaxial cable 11 does not matter. For example, cables of AWG28 to 46 according to the specification of American Wire Gauge (AWG) can be used. For example, when setting pitch to 0.5 mm, the coaxial cable 11 of AWG28-32 can be used. When making pitch 0.3 mm, the coaxial cable 11 of AWG42 can be used.

Next, the coaxial cable harness using the coaxial cable 11 is demonstrated.

First example

As shown in FIG. 2, the edge part of the coaxial cable 11 which comprises the coaxial cable harness 10 is exposed, and the center conductor 12, the inner insulator 13, and the outer conductor are sequentially exposed from the front end side. Each of 14 is exposed by predetermined length step by step. The plurality of exposed coaxial cables 11 are connected to the relay board 21. Although the coaxial cable 11 is the aggregate arrange | positioned in planar shape so that it may be easily connected to the relay board 21 at the edge part, it may be tied other than an edge part.

The relay board 21 has a connection surface 31, and a plurality of coaxial cables 11 are connected to the connection surface 31. This relay board 21 is comprised with the flexible board and hard board which have wiring patterns, such as metal foil, for example.

On the connection surface 31, a plurality of signal line portions 32 and a plurality of ground line portions 33 constituting a plurality of strip-shaped wiring patterns are alternately formed in the width direction of the relay substrate 21. The distal end portion of the signal line portion 32 and the ground line portion 33 are the contacts 32a and 33a. These contacts 32a and 33a are arranged at parallel pitches P at predetermined equal intervals.

The ground wire part 33 arranged on one side side (lower side in FIG. 2) of the relay board 21 is the rear end side (the side to which the coaxial cable is connected (right side in FIG. 2)) of the relay board 21. It extends and is bent beyond the point where the signal line part 32 is connected with the center conductor 12, and it is formed so that it may extend in the extending direction of a wiring pattern. The portion extending in the stretching direction of the wiring pattern is the connecting portion 33b. And the outer conductor 14 of the coaxial cable 11a arrange | positioned at the one side part side (lower side in FIG. 2) of the relay board 21 is connected to the connection part 33b of this ground wire part 33. As shown in FIG.

The other ground wire part 33 which is not connected to the external conductor 14 is soldered and connected to the center conductor 12 of the coaxial cable 11. The coaxial cable 11 to which the center conductor 12 is connected to the ground wire part 33 functions as a ground wire. On the other hand, each signal line part 32 is soldered and connected to the center conductor 12 of the coaxial cable 11, and these function in order to carry and transmit a signal. If m is the number of signal line portions 32, n is the number of ground line portions 33, and c is the number of coaxial cables 11 and 11a, then a relationship of "m ≤ c <m + n" is established.

In this way, the ground wire portion 33 disposed on one side portion (bottom of FIG. 2) side of the relay board 21 is not connected to the center conductor 12 of the coaxial cable 11, Since it is connected to the outer conductor 14 of the coaxial cable 11a arrange | positioned at the same one side part, it connects only to the ground wire part 33 arrange | positioned at the one side part (bottom of FIG. 2) side of the relay board 21. The number of coaxial cables 11 can be reduced by omitting the coaxial cables 11. Thereby, the diameter of all or any one or more of the coaxial cables 11 which comprise the coaxial cable harness 10 can be enlarged.

For example, when all the ground lines and the signal lines are respectively connected to the center conductor of the coaxial cable, the same number of coaxial cables as the all ground lines and the signal lines are required, and the relationship is "c = m + n". In the present invention, the number of the coaxial cables is smaller than this, and the diameter of all or one or more center conductors of the coaxial cables 11 can be increased as the number is smaller.

In this embodiment, as for the coaxial cable 11a arrange | positioned at one side part of the relay board 21, the diameter of the center conductor 12 is larger diameter than the other coaxial cable 11, and the external diameter of the whole outer diameter is also large diameter. It is used.

In this case, when the parallel pitch of the other coaxial cable 11 is set to the same parallel pitch P as the signal line part 32 and the ground line part 33, the coaxial cable 11a disposed at one side of the relay board 21. The center conductor 12 of () is not arranged in the same straight line shape as the corresponding signal line part 32. Therefore, in the large diameter coaxial cable 11a arrange | positioned at one side part of the relay board 21, the front-end | tip part is arrange | positioned and connected to the corresponding signal line part 32 by bending the center conductor 12. FIG. . That is, the arrangement | positioning space of the signal line part 32 and the ground line part 33 on the side to which the coaxial cables 11 and 11a are connected in the relay board 21 differs from the parallel pitch P of equal intervals on the opposite side.

The signal line portion 32 or the ground line portion 33 and the center conductor 12 may be connected by a conductive adhesive or the like instead of soldering.

The outer conductor 14 of each coaxial cable 11, 11a is provided with a ground bar 38. The ground wire part 33 disposed on one side (bottom of FIG. 2) side of the relay board 21 is connected to the outer conductor 14 of the coaxial cable 11a and is also conducted by the ground bar 38. It is grounded at the other end side via the outer conductor 14 of the other coaxial cable 11. Moreover, each ground wire part 33 other than the ground wire part 33 arrange | positioned at the one side part side of the relay board 21 is grounded at the other end side of the center conductor 12 of the connected coaxial cable 11.

The relay board 21 is connected by inserting it into the receptacle of the connector provided in the circuit boards, such as an electronic device, from the front end side (left side of FIG. 2). As a result, the contacts 32a and 33a of the relay board 21 are in conductive contact with the terminal on the receptacle side, and are in electrical communication with the wiring on the circuit board side where the receptacle is provided. In addition, each ground wire portion 33 is connected to the ground circuit on the circuit board side via a receptacle.

In addition, a connector may be provided at the distal end of the relay board 21 and connected to a connector provided on a circuit board side such as an electronic device. In addition, the connection direction to a circuit board may be either a direction orthogonal to the surface of a circuit board, or the direction along the surface of a circuit board.

In addition, the coaxial cable harness 10 has an L-shaped structure in which the arrangement of the connection positions of the coaxial cables 11 in the relay board 21 is along the longitudinal direction of the coaxial cable 11 (see FIG. 3 (a)). You may. Alternatively, the T-type structure (see FIG. 3B) in which the arrangement of the connection positions of the coaxial cables 11 in the relay board 21 is orthogonal to the longitudinal direction of the coaxial cable 11 may be used.

According to this embodiment, since one of the ground wire portions 33 is connected to the outer conductor 14 of one coaxial cable 11a without being connected to the center conductor 12 of the coaxial cable 11, the ground wire The number of coaxial cables 11 and 11a for connecting the center conductor 12 to the part 33 and grounding can be reduced. By reducing the number of coaxial cables 11, the coaxial cables 11 and 11a connected to the signal line part 32 can be used for the large diameter of the center conductor 12, and can be used for electrical characteristics such as transmission characteristics and noise characteristics. Can be improved.

For example, in the case of increasing the diameter of one coaxial cable 11a, when the diameter W of the coaxial cable 11 which is not enlarged is made into the pitch P or less (W≤P), the coaxial cable which enlarges The diameter Wa of 11a can be made larger than pitch P (Wa> P).

In addition, since at least one of the ground wire portions 33 of the relay board 21 is connected to the outer conductor 14 of the coaxial cables 11 and 11a and grounded through the outer conductor 14, the feedback current path is It becomes a small loop and can improve an electrical characteristic. That is, the coaxial cable harness 10 mounted with high density can be obtained while ensuring good electrical characteristics, and it can cope well with the increase in the amount of information accompanying higher performance of electronic devices.

In addition, in this embodiment, although it connected to the outer conductor 14 of one coaxial cable 11a, without connecting the center conductor 12 of the coaxial cable 11a with respect to one ground wire part 33, The number of grounding wire portions 33 connected to the external conductor 14 without being connected to the conductor 12 and the number of coaxial cables 11 connecting the grounding wire portions 33 to the external conductor 14 may be one or more. .

In addition, any of the ground wire part 33 connected to the outer conductor 14 without connecting the center conductor 12 and the coaxial cable 11 to which the ground wire part 33 is connected to the outer conductor 14 are relayed. It is not limited to the one side part of the board | substrate 21.

In addition, although it is preferable to provide a ground bar 38 to align and fix each coaxial cable 11 and to equalize the ground potential of the outer conductor 14, a coaxial cable ( This ground bar 38 may be absent as long as 11) can be fixed well.

Next, another embodiment of the present invention will be described.

2nd example

In the example shown in FIG. 4, the both ends of some signal line part 32 and the ground line part 33 are different positions in the width direction of the relay board 21. As shown in FIG.

In this arrangement, the signal line portion 32 and the ground line portion 33 are bent between the connection point with the center conductor 12 and the contacts (left end in Fig. 4) 32a, 33a. In addition, the ground wire portion 33 connected to the outer conductor 14 of the coaxial cable 11a has a width dimension changed in accordance with the bending of the adjacent signal wire portion 32.

In this second example, the wiring patterns of the signal line portion 32 and the ground line portion 33 are bent in the middle or the width dimension of the wiring pattern is changed so that the pitch P of the contacts 32a and 33a is not changed. In all the coaxial cables 11 including the large diameter coaxial cable 11a, the center conductor 12 can be connected to the signal line portion 32 or the ground line portion 33 without bending.

According to this coaxial cable harness 10, the bending work at the time of connection of the center conductor 12 can be eliminated, and the operation which connects the coaxial cable 11 and the relay board 12 can be made easy. . In addition, when each coaxial cable 11 is equally large diameter, for example, the pitch of the coaxial cable 11 can be equalized without changing the pitch P of the contacts 32a and 33a. .

Third example

The example shown in FIG. 5 is a modification of the example shown in FIG. 4, and is the example which enlarged the diameter of each coaxial cable 11. As shown in FIG. Also in this third example, by bending the wiring patterns of the signal line part 32 and the ground line part 33 on the way, in all the coaxial cables 11 without changing the pitch P of the contacts 32a and 33a, The center conductor 12 is connected to the signal line portion 32 or the ground line portion 33 without bending.

Also in the case of the coaxial cable harness 10 of this structure, the bending work at the time of connection of the center conductor 12 can be eliminated, and the operation which connects the coaxial cable 11 and the relay board 12 is easy. can do. Further, by equalizing large diameters of the coaxial cables 11, for example, the electrical characteristics can be improved by the large diameter of the central conductor 12.

4th example

In the example shown in FIG. 6, each ground wire part 33 is formed so that it may extend to the rear end (right side of FIG. 6) side of the relay board 21, and it may extend to the side (width direction of a relay board), respectively, and the connection part ( 33b). The ground line portion 33 is longer than the signal line portion 32. The outer conductor 14 of each coaxial cable 11 is connected to each connecting portion 33b of the ground wire portion 33. The ground wire portion 33 is not connected to the coaxial cable 11 for the ground wire, but is grounded via the outer conductor 14 of the coaxial cable 11 for the signal line. When all the outer conductors 14 are connected to the ground bar 38, the coaxial cable 11 for each ground wire is grounded to the ground circuit on the coaxial cable side via all the outer conductors 14, and each ground wire portion 33 The potential of can be equalized.

According to the coaxial cable harness 10 of this structure, the number of coaxial cables 11 is reduced, and the electrical characteristics are improved by the large diameter of the center conductor 12 of the coaxial cable 11 connected to the signal line part 32. Can be planned.

5th example

In the example shown in FIG. 7, each of the ground wires 33 is formed so as to extend toward the rear end (right side of FIG. 7) of the relay board 21 and is formed to extend laterally (the width direction of the relay board) at the rear end ( 33b) is connected and it is set as the integral connection part 33c. The outer conductor 14 of each coaxial cable 11 is connected to this integrated connection part 33c.

In the coaxial cable harness 10 of this structure, the ground wire part 33 is grounded via the outer conductor 14 of the coaxial cable 11 for signal lines, without connecting to the coaxial cable for the ground wires. By reducing the number of coaxial cables 11, it is possible to improve the electrical characteristics by the large diameter of the center conductor 12 of the coaxial cable 11 connected to the signal line portion 32. In addition, if each external conductor 14 is connected to the integral connection part 33c by soldering or the like, the potential of each ground wire part 33 can be equalized without using the ground bar 38.

6th example

In the example shown in FIG. 8, each ground wire part 33 is formed so that it may extend to the rear end (right side of FIG. 8) side of the relay board 21, and the connection part formed so that it may extend to the side (width direction of a relay board) from a rear end. 33b is connected for every arbitrary unit number, and it is set as the integral connection part 33c. The outer conductor 14 of each coaxial cable 11 is connected to this integrated connection part 33c.

In the coaxial cable harness 10 of this structure, the ground wire part 33 is grounded via the outer conductor 14 of the coaxial cable 11 for signal lines, without connecting to the coaxial cable for the ground wires. By reducing the number of coaxial cables 11, it is possible to improve the electrical characteristics by the large diameter of the center conductor 12 of the coaxial cable 11 connected to the signal line portion 32. In this case, if each external conductor 14 is connected to the integral connecting portion 33c by soldering or the like, the potential of each grounding wire portion 33 can be equalized for each unit number without using the grounding bar 38. .

7th example

The example shown in FIG. 9 shows the structure where the signal line parts 32 adjoin. Moreover, each ground wire part 33 is formed so that it may extend to the rear end (right side of FIG. 9) side of the relay board 21, and may connect the connection part 33b extended to the side (width direction of a relay board) from the rear end, and integrally connects them The outer conductor 14 of each coaxial cable 11 is connected to this integral connection part 33c. This wiring can be used when differential transmission is made to the adjacent signal line portion 32 without having the ground line portion 33 interposed therebetween.

According to the coaxial cable harness 10 of this structure, the ground wire part 33 is grounded via the outer conductor 14 of the coaxial cable 11 for signal lines, without connecting to the coaxial cable for ground wires.

Also in this case, the number of coaxial cables 11 can be reduced, and the electrical characteristics can be improved by the large diameter of the center conductor 12 of the coaxial cable 11 connected to the signal line part 32. In addition, when each external conductor 14 is connected to the integral connection part 33c by soldering or the like, the potential of each ground wire part 33 can be equalized without using the ground bar 38.

10: coaxial cable harness 11, 11a: coaxial cable
12: center conductor 13: internal insulator
14: outer conductor 15: sheath
21: relay board 32: signal line portion
32a, 33a: contact 33: ground wire
33b: connection part 33c: integral connection part (connection part)
P: Parallel pitch (equal interval)

Claims (6)

A plurality of coaxial cables having a center conductor, an inner insulator disposed on the outer circumference of the center conductor, an outer conductor disposed on the outer circumference of the inner insulator, and an outer shell disposed on the outer circumference of the outer conductor, and at least one end of the plurality of coaxial cables In the coaxial cable harness having a relay board connected to the side,
A plurality of signal line portions and a plurality of ground line portions are arranged on the relay board, and at the ends opposite to the side connected to the coaxial cable, the signal line portions and the ground line portions are arranged at equal intervals (P) and connected to the coaxial cable. The distance between the signal line portion and the ground line portion at the end of the side to be different is different from the equal interval P at the other end,
M is the number of the signal line portions, n is the number of the ground line portions, and c is the number of the coaxial cables, &quot; m ≦ c <m + n &quot;
Each of the signal line portions is connected to a center conductor of one of the coaxial cables, and the ground line portion is connected to all or at least one external conductor without all or at least one being connected to the center conductor,
A diameter of at least one of the coaxial cables connected to the signal line portion is larger than the equal interval P.
Coaxial cable harness. The method of claim 1,
Both ends of at least one of the signal line portion and the ground line portion are bent such that they are at different positions in the width direction of the relay substrate.
Coaxial cable harness. The method of claim 2,
The ground wire portion adjacent to the bent signal line portion has a width dimension changed in accordance with the bending of the bent signal line portion.
Coaxial cable harness. The method according to any one of claims 1 to 3,
One end of the signal line portion and the ground line portion are evenly arranged, a center conductor of the coaxial cable is connected to the signal line portion, an outer conductor or a center conductor of the coaxial cable is connected to the other end of the ground line portion, the coaxial cable The arrangement pitch of the coaxial cable is larger than the arrangement pitch of the signal line portion and the ground line portion.
Coaxial cable harness. The method according to any one of claims 1 to 3,
A plurality of said ground wire part is connected, This connection part becomes a connection part connected with the outer conductor of the said coaxial cable, It is characterized by the above-mentioned.
Coaxial cable harness. The method of claim 5, wherein
Outer conductors of all coaxial cables are connected to the connecting portion.
Coaxial cable harness.

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