JP2004071384A - Transmission cable and method of connecting transmission cable and connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission cable eliminating useless ground wiring by eliminating the necessity of connection of each ground on a connector, having electrically effective ground wiring, not requiring precise cutting of shielding material, eliminating the scatter of the end surface of the shielding material, with improved cross-talk property. <P>SOLUTION: The transmission cable is formed by covering the external periphery of a pair of signal wires 3, 5 made of conductor of which outer periphery is covered by covering material 9, by a shielding material 11. The end part of the shielding material 11 and the pair of signal wires are cut up and the signal wires 3, 5 are exposed, and a conductive member is put on the end part of the shielding member 11 and the pair of signal wires. A drain wire 7 is arranged in the shielding material 11, and a part of the drain wire 7 is made to contact the conductive member, and the conductive member is formed by a metal pipe 13 by which the shielding material 11 and the end part of the pair of signal wires are mounted. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transmission cable and a method for connecting a transmission cable and a connector.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a collective cable as a transmission cable used between servers such as computers, and is used when reception and transmission are performed instantaneously or simultaneously smoothly even when a large amount of communication signals are transmitted instantaneously. The above-mentioned collective cable is configured by arranging a large number of signal lines or signal line pairs in a plurality of layers from the inner side to the outer side. Note that the signal line is formed by coating the outer periphery with a covering material made of a low-density insulator, and the signal line pair is a two-core coaxial cable (Twinax) holding a pair of signal lines in parallel.
[0003]
In this two-core coaxial cable 101, for example, as shown in FIG. 7, central conductors 103A and 103B as signal lines are arranged in parallel, and coating materials 105A and 105B cover the outer periphery of the central conductors 103A and 103B. At the same time, the outer circumference is covered with a shield material 109 made of an Al-pet tape together with the drain wire 107.
[0004]
The center conductors 103A and 103B and the drain wire 107 of the two-core coaxial cable 101 are connected to the signal line tabs 113A and 113B and the ground tab 115 of the connector 111, for example, as shown in FIGS. Are connected by soldering or welding.
[0005]
[Problems to be solved by the invention]
By the way, when connecting the center conductors 103A and 103B and the drain wire 107 of the conventional two-core coaxial cable 101 to the signal line tabs 113A and 113B and the ground tab 115 of the connector 111 by soldering or welding, It is necessary to output the two-core coaxial cable 101.
[0006]
Further, in the conventional assembly of the two-core coaxial cable 101, the ground (GND) of each of the two-core coaxial cables 101 is individual, and the continuity of each GND is established inside the connector or on the board beyond the receptacle. When the shield material of each two-core coaxial cable 101 is exposed, cutting by various lasers or cutters has been performed.
[0007]
In order to establish the continuity of each GND on the connector 111, it is necessary to route the wiring on the board using the board. When a laser is used to cut the shield material, burrs are formed on the cut surface, and cross-talk characteristics (crosstalk) may be deteriorated and a short circuit may occur with the signal line. In the case of cutting with a cutter, there is a possibility that the coating insulation may be damaged. In each case, it took a lot of effort to align the end surfaces of the shield members 109 (shield tape) of each pair, and it was difficult to actually control them, and it was difficult to improve the crosstalk resistance. And, the longer the distance between the end surface of the shield material 109 (shield tape) and the connection portion of the central conductors 103A and 103B, the larger the tendency.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to eliminate the need to conduct each ground on a connector, eliminate the need to uselessly route grounds, and provide an efficient ground in terms of electrical characteristics. A transmission cable that enables wiring, does not require precision in cutting the shield material, eliminates variations in the end surface of the shield material, and improves crosstalk characteristics, etc. To provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a transmission cable according to the present invention according to claim 1 is a transmission cable in which the outer periphery of a pair of signal lines in which the outer periphery of a signal line made of a conductor is covered with a covering material is covered with a shield material. An end of the shield material and the signal line pair is cut off to expose the signal line, and an end of the shield material and the signal line pair is covered with a conductive member.
[0010]
Therefore, it is necessary to cut off the ends of the shield material and the signal line pair, expose the signal lines, and cover the ends of the shield material and the signal line pairs with conductive members, thereby conducting each ground on the connector. This eliminates the need to uselessly route the ground. In addition, conduction between the conductive member and the shield material can be obtained, and the portion without the shield material is reduced, thereby improving crosstalk resistance (crosstalk resistance) and noise resistance.
[0011]
According to a second aspect of the present invention, there is provided the transmission cable according to the first aspect, wherein a drain wire is provided in the shield material, and a part of the drain wire is in contact with the conductive member. Is what you do.
[0012]
Therefore, a part of the drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line is established. As a result, the same operation as the first aspect is achieved.
[0013]
According to a third aspect of the present invention, in the transmission cable according to the first or second aspect, the conductive member is formed of a metal pipe to which the shield member and an end of the signal line pair are attached. It is a feature.
[0014]
Therefore, since the conductive member is formed of a metal pipe for attaching the ends of the shield material and the signal line pair, the outer circumference of the shield material and the end of the signal line pair is covered with the metal pipe, Thus, the portion having no symbol is reduced, and the crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0015]
According to a fourth aspect of the present invention, there is provided a transmission cable in which a plurality of coaxial cables, in which the outer circumference of a pair of signal lines covered with a covering material is covered with a covering material and the outer circumference of a signal line made of a conductor is covered with a shielding material, are arranged in parallel. Wherein the shield member of each of the coaxial cables and the end of the signal line pair are cut off to expose the signal line, and the shield member and the end of the signal line pair of each coaxial cable are covered with a conductive member. It is characterized by the following.
[0016]
Therefore, the shield member of each of the coaxial cables and the end of the signal line pair are cut off to expose the signal line, and the shield member and the end of the signal line pair of each of the coaxial cables are covered with a conductive member. Common ground on the cable. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0017]
According to a fifth aspect of the present invention, there is provided the transmission cable according to the fourth aspect, wherein a drain wire is provided in a shield member of each of the coaxial cables, and a part of each of the drain wires is in contact with the conductive member. It is characterized by having.
[0018]
Therefore, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line is established. As a result, the same operation as the fifth aspect is achieved.
[0019]
According to a sixth aspect of the present invention, in the transmission cable according to the fourth or fifth aspect, the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel. At a constant pitch, holes for mounting the shield material of each of the coaxial cables and the ends of the signal line pairs are formed.
[0020]
Therefore, the conductive member is formed of a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the ends of the shield material and the signal line pair of each of the coaxial cables are arranged in the holder at a constant pitch. Since the hole for mounting is formed, it becomes a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0021]
According to a seventh aspect of the present invention, there is provided the transmission cable according to the fourth or fifth aspect, wherein the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holder has an upper portion. And a groove for mounting the ends of the shield material and the signal line pair of each of the coaxial cables is formed in the upper and lower portions at a constant pitch opposite to each other. Is what you do.
[0022]
Therefore, the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holder is divided into an upper part and a lower part, and the upper part and the lower part are opposed to each other at a fixed position. Since a groove is formed at the pitch for mounting the shield material of each of the coaxial cables and the end of the signal line pair, it becomes a common ground on the plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0023]
According to an eighth aspect of the present invention, there is provided the transmission cable according to the fourth or fifth aspect, wherein the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel. , Lower portions are provided with openings alternately at a constant pitch, and a shield member of each coaxial cable and an end of a signal line pair are attached to each of the openings.
[0024]
Therefore, the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holder has upper and lower portions provided with openings alternately at a constant pitch opposite to each other. Since the shield material of each of the coaxial cables and the end of the signal line pair are attached to each of the openings, a common ground is formed on the plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0025]
The method for connecting a transmission cable and a connector according to the present invention according to the ninth aspect of the present invention provides the transmission cable, wherein the outer periphery of a pair of signal lines covered with a covering material is covered with a shielding material. The end of the material and the signal line pair is cut off to expose the signal line, and the shield member and the end of the signal line pair are covered with a conductive member. Is connected to a pair of signal lines.
[0026]
Therefore, the ends of the shield member and the signal line pair are cut off to expose the signal lines, and the shield member and the end portions of the signal line pair are covered with a conductive member, and the conductive member is substantially adhered to the end of the connector. Thus, since one pair of signal lines is connected to the connector, it becomes a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0027]
According to a tenth aspect of the present invention, in the method for connecting a transmission cable and a connector according to the ninth aspect, a drain line is provided in the shield material, and a part of the drain line is provided in the shield material. It is characterized by being in contact with a conductive member.
[0028]
Therefore, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line is established. As a result, the same operation as the ninth aspect is achieved.
[0029]
According to a eleventh aspect of the present invention, in the method for connecting a transmission cable and a connector according to the present invention, a plurality of coaxial cables in which the outer circumference of a pair of signal lines covered with a covering material is covered with a shielding material is arranged in parallel. In the transmission cable arranged in the above, the shield material of each of the coaxial cables and the end of the signal line pair are cut off to expose the signal lines, and a conductive member is provided on the shield material of each of the coaxial cables and the end of the signal line pair. The conductive member is placed almost in close contact with the end of the connector, and a pair of signal lines is connected to the connector.
[0030]
Therefore, the shield member of each coaxial cable and the end of the signal line pair are cut off to expose the signal line, and the shield member of each coaxial cable and the end of the signal line pair are covered with a conductive member. Since one pair of signal lines is connected to the connector almost in close contact with the end of the connector, it becomes a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance are improved.
[0031]
According to a twelfth aspect of the present invention, in the method for connecting a transmission cable and a connector according to the tenth aspect, a drain line is provided in a shield material of each of the coaxial cables. Are in contact with the conductive member.
[0032]
Therefore, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line is established. As a result, the same operation as the eleventh aspect is achieved.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0034]
As the transmission cable according to the embodiment of the present invention, a collective transmission cable (generally referred to as a collective cable) configured by arranging a plurality of signal lines or signal line pairs in a plurality of layers from the inner peripheral side to the outer peripheral side. ), And the transmission cables are assembled while twisting the signal lines or signal line pairs formed of a large number of conductors in order to impart flexibility to the transmission cables. The signal line pair holds a pair of signal lines substantially in parallel, and for example, there is a two-core coaxial cable.
[0035]
For example, as shown in FIG. 6A, a two-core coaxial cable 1 as a transmission cable includes signal lines 3 and 5 and drain lines 7 made of substantially parallel conductors, and the outer periphery of the signal lines 3 and 5. Is covered with a coating material 9 made of resin. The signal lines 3 and 5 and the drain line 7 are covered with a shield material 11 made of an Al-pet tape on the outer periphery in the longitudinal direction. As shown in FIG. 6B, the two-core coaxial cable 1 does not include the drain wire 7. Then, as shown in FIGS. 1A and 1B, the ends of the two-core coaxial cable 1 are cut off by a laser or a cutter, for example, with a coating material 9 and a shielding material 11, so that the signal lines 3, 5, and Tapping is performed so that the end of the drain line 7 is exposed. The ends of the signal lines 3 and 5 and the drain line 7 are connected to the connector by soldering or welding.
For example, as shown in FIG. 1A, a metal pipe 13 made of, for example, copper as a conductive member is provided at the end of the two-core coaxial cable 1, that is, at the ends of the covering material 9 and the shielding material 11. Cover, the shield material 11, the drain wire 7, and the metal pipe 13 are brought into conduction. The material of the metal pipe 13 may be not only copper but also other metals such as aluminum which is not a magnetic material.
[0036]
As shown in FIG. 1B, the ends of the signal lines 3 and 5 and the drain line 7 are connected to the signal line connection tabs 17 and 19 and the ground tab 21 of the connector 15, respectively. Then, the metal pipe 13 is slid upward in FIG. Another plurality of two-core coaxial cables 1 are arranged in parallel in the left-right direction in FIG. 1B and connected in the same manner, and the metal pipe 13 is slid upward in FIG. By keeping the end faces of the shield material 11 at the same position for all signal line pairs, it is possible to reduce the portion without the layer of the shield material 11 and improve crosstalk resistance. .
[0037]
FIGS. 2A and 2B show another embodiment that replaces FIGS. 1A and 1B. 2A and 2B, the same components as those in FIGS. 1A and 1B are denoted by the same reference numerals, and redundant description will be omitted. 2A and 2B, the conductive member comprises a holder 23 extending in a direction in which a plurality of coaxial cables 1 are arranged in parallel in the left-right direction. A hole 25 for mounting the shield member 9 and the end of the signal line pair 3, 5 of each coaxial cable 1 is formed penetrating in the front-rear direction.
[0038]
When the shield material 9 of each coaxial cable 1 and the ends of the signal line pairs 3 and 5 are fitted into the holes 25 as shown in FIG. The ends of the signal lines 3 and 5 and the drain line 7 are connected to 17, 19 and the ground tab 21, respectively. Then, the holder 23 is slid upward in FIG. 2 (B) and brought into close contact with the end face of the connector 15, so that the end face of the shield material 11 is kept at the same position with respect to all the signal line pairs, so that the shield material is The portion without the eleventh layer can be reduced, and the crosstalk resistance can be improved.
[0039]
In addition, since the shield material 11 of each coaxial cable 1 is located in the holder 23 while being a common ground on the plurality of coaxial cables 1, cutting of the shield material 11 does not require high accuracy. Since the end surface of the shield member 11 becomes the end surface of the holder 23, the end surface of the shield member 11 of each coaxial cable 1 can be made uniform, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved. be able to.
[0040]
FIGS. 3A and 3B show another embodiment that replaces FIGS. 1A and 1B. 3 (A) and 3 (B), the same components as those in FIGS. 1 (A) and 1 (B) are denoted by the same reference numerals, and redundant description will be omitted. 3A and 3B, the conductive member comprises a holder 27 extending in the left-right direction in which a plurality of coaxial cables 1 are arranged in parallel, and the holder 27 is divided into an upper part 27U and a lower part 27D. At the same time, the upper surface 27U and the lower surface 27D are opposed to each other at a constant pitch P, and the shield material 11 of the coaxial cable 1 and the grooves 29U and 29D for mounting the ends of the signal line pairs 3 and 5 are opposed to each other. It is formed.
[0041]
As shown in FIG. 3B, the shield material 9 of each coaxial cable 1 and the ends of the signal line pairs 3 and 5 are fitted into the grooves 29D of the lower portion 25D, and the grooves 29U of the upper portion 25U. When the upper portion 27U is put on the lower portion 27D in accordance with the groove 29D, the ends of the signal lines 3, 5 and the drain line 7 are connected to the signal line connection tabs 17, 19 and the ground tab 21 of the connector 15, respectively. You. Then, the holder 27 is slid upward in FIG. 3 (B) and brought into close contact with the end face of the connector 15 to form a common ground on the plurality of coaxial cables 1. 27, the cutting of the shield member 11 does not require high precision. Further, since the end surface of the shield member 11 of each coaxial cable 1 becomes the end surface of the holder 25, the end surface of the shield member 11 of each coaxial cable 1 And the crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0042]
FIGS. 4A and 4B show another embodiment that replaces FIGS. 1A and 1B. 4 (A) and 4 (B), the same components as those in FIGS. 1 (A) and 1 (B) are denoted by the same reference numerals, and redundant description will be omitted. 4 (A) and 4 (B), the conductive member comprises a holder 31 extending in the left-right direction in which a plurality of coaxial cables 1 are arranged in parallel, and the holder 31 is opposed to the upper part and the lower part, respectively. For example, U-shaped openings 31D and 31U are alternately provided at a constant pitch P, and each of the openings 31D and 31U has a shield material 11 and a signal line pair of the coaxial cable 1 shown in FIG. 3, 5 ends are attached
Therefore, it becomes a common ground on the plurality of coaxial cables 1, and since the shield member 11 of each coaxial cable 1 is located in each of the openings 31 </ b> D and 31 </ b> U of the holder 31, there is no need for precision in cutting the shield member 11. Further, since the end surface of the shield material 11 of each coaxial cable 1 becomes the end surface of the holder 27, the end surface of the shield material 11 of each coaxial cable 1 can be made uniform, and crosstalk resistance (crosstalk resistance) can be eliminated. In addition, noise resistance can be improved.
[0043]
FIGS. 5 (A) and 5 (B) show a modification which is an alternative to FIGS. 4 (A) and 4 (B). 5 (A) and 5 (B), the same components as those in FIGS. 4 (A) and 4 (B) are denoted by the same reference numerals, and redundant description will be omitted. 5A and 5B, a recess 35 into which the drain line 7 enters is formed in each of the openings 33D and 33U of the holder 33. Otherwise, it is the same as FIGS. 4 (A) and 4 (B).
[0044]
Other operations and effects are the same as those shown in FIGS. 4A and 4B, except that each drain line 7 enters only each recess 35.
[0045]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.
[0046]
【The invention's effect】
As understood from the above description of the embodiment of the invention, according to the invention of claim 1, the ends of the shield material and the signal line pair are cut off to expose the signal line, and the shield material and the signal are removed. By covering the ends of the wire pairs with the conductive member, it is not necessary to conduct the grounds on the connector, and it is possible to eliminate the need to uselessly route the grounds. In addition, the conductive member and the shield material can be conducted, and the portion without the shield material can be reduced, so that the crosstalk resistance (crosstalk resistance) and the noise resistance can be improved.
[0047]
According to the second aspect of the present invention, a part of the drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line can be established. As a result, the same effect as the first aspect can be obtained.
[0048]
According to the third aspect of the present invention, since the conductive member is formed of a metal pipe for mounting the ends of the shield material and the signal line pair, the outer periphery of the end portions of the shield material and the signal line pair is formed of metal. The portion covered with the pipe and having no shield material can be reduced, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0049]
According to the invention of claim 4, the shield member of each of the coaxial cables and the end of the signal line pair are cut off to expose the signal line, and the conductive member is provided on the shield member of each of the coaxial cable and the end of the signal line pair. And become a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located within the conductive member, the cutting of the shield material does not require high precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable can be eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0050]
According to the fifth aspect of the present invention, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line can be established. As a result, the same effect as the fourth aspect can be obtained.
[0051]
According to the invention of claim 6, the conductive member is formed of a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel. Since the holes for attaching the ends of the signal line pairs are formed, the holes serve as a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located within the conductive member, the cutting of the shield material does not require high precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable can be eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0052]
According to the invention of claim 7, the conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holder is divided into an upper part and a lower part, and the upper part and the lower part Since a groove for mounting the shield material of each of the coaxial cables and the end of the signal line pair is formed at a constant pitch opposed to each other, it becomes a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable can be eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0053]
According to the invention of claim 8, the conductive member is formed of a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holders are opposed to each other at an upper portion and a lower portion at a constant pitch. In each of the openings, the shield material of each of the coaxial cables and the end of the signal line pair are attached, so that the common ground is formed on the plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end face of the shield material of the coaxial cable can be eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0054]
According to the ninth aspect of the present invention, the ends of the shield member and the signal line pair are cut off to expose the signal lines, and the shield member and the end portions of the signal line pair are covered with a conductive member. And a signal line pair is connected to the connector, so that it becomes a common ground on a plurality of coaxial cables. In addition, since the shield material of each coaxial cable is located in the conductive member, the cutting of the shield material does not require precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end face of the shield material of the coaxial cable are eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0055]
According to the tenth aspect of the present invention, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line can be established. As a result, the same effect as the ninth aspect can be obtained.
[0056]
According to the eleventh aspect of the present invention, the shield member of each coaxial cable and the end of the signal line pair are cut off to expose the signal line, and a conductive member is provided on the shield member of each coaxial cable and the end of the signal line pair. This conductive member is placed almost in close contact with the end of the connector, and a pair of signal lines is connected to the connector. In addition, since the shield material of each coaxial cable is located within the conductive member, the cutting of the shield material does not require high precision, and further, since the end surface of the shield material of each coaxial cable becomes the end surface of the conductive member, Variations in the end surface of the shield material of the coaxial cable can be eliminated, and crosstalk resistance (crosstalk resistance) and noise resistance can be improved.
[0057]
According to the twelfth aspect, a part of each drain line is brought into contact with the conductive member, and conduction between the conductive member and the drain line can be established. As a result, the same effect as the eleventh aspect can be obtained.
[Brief description of the drawings]
FIG. 1A is a perspective view of a two-core coaxial cable as a transmission cable covered with a metal pipe as a conductive member at the end, and FIG. 1B is a diagram in which the two-core coaxial cable of FIG. 1A is connected to a connector. FIG.
FIG. 2A is a perspective view in which an end of a two-core coaxial cable as a transmission cable is attached to a hole of a holder as a conductive member, and FIG. 2B is a connector using the two-core coaxial cable of FIG. It is a top view of the state where it was connected.
FIG. 3A is a perspective view in which an end of a two-core coaxial cable as a transmission cable is mounted in a groove of a holder as a conductive member, and FIG. 3B is a perspective view in which the two-core coaxial cable of FIG. It is a top view of the state where it was connected.
4A is a perspective view in which an end of a two-core coaxial cable as a transmission cable is attached to an opening of a holder as a conductive member, and FIG. 4B is a connector of the two-core coaxial cable of FIG. FIG. 4 is a plan view of a state in which the device is connected to the device.
FIG. 5A is a perspective view in which an end of a two-core coaxial cable as a transmission cable is mounted with a concave portion provided in an opening of a holder as a conductive member, and FIG. 5B is a two-core cable of FIG. It is a top view in the state where a coaxial cable was connected to a connector.
FIGS. 6A and 6B are perspective views showing states of ends of a two-core coaxial cable as a transmission cable.
FIG. 7 is a cross-sectional view of a two-core coaxial cable as a conventional transmission cable.
8 (A) and 8 (B) are a perspective view and a plan view showing a state where an end of a conventional two-core coaxial cable as a transmission cable is connected to a connector.
[Explanation of symbols]
1 2-core coaxial cable (transmission cable)
3 signal lines
5 signal lines
7 Drain wire
9 Coating material
11 Shielding material
13 Metal pipe (conductive member)
15 Connector
17, 19 Tab for signal line
21 Ground tab
23 Holder (conductive member)
25 holes
27 Holder (conductive member)
27U upper part
27D lower part
29U, 29D groove
31 Holder (conductive member)
31U, 31D opening
33 Holder (conductive member)
33U, 33D opening
35 recess

Claims (12)

A transmission cable in which the outer periphery of a pair of signal lines is covered with a shield material and the outer periphery of a signal line made of a conductor is covered with a shield material, and the ends of the shield material and the signal line pair are cut off to expose the signal lines. A transmission cable, wherein a conductive member is placed over the shield material and the end of the signal line pair. The transmission cable according to claim 1, wherein a drain wire is provided in the shield material, and a part of the drain wire is in contact with the conductive member. 3. The transmission cable according to claim 1, wherein the conductive member is formed of a metal pipe to which the shield member and an end of the signal line pair are attached. A transmission cable in which a plurality of coaxial cables in which the outer periphery of a pair of signal lines in which the outer periphery of a signal line made of a conductor is covered with a covering material is covered with a shielding material are arranged in parallel, wherein the shielding material of each of the coaxial cables is provided. A transmission cable characterized in that the end of the signal line pair is cut off to expose the signal line, and the shield member of each of the coaxial cables and the end of the signal line pair are covered with a conductive member. The transmission cable according to claim 4, wherein a drain wire is provided in a shield material of each of the coaxial cables, and a part of each of the drain wires is in contact with the conductive member. The conductive member is formed of a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the shield material of each of the coaxial cables and the end of the signal line pair are mounted at a constant pitch in the holder. The transmission cable according to claim 4, wherein a hole is formed. The conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel, and the holder is divided into an upper part and a lower part, and the upper part and the lower part are opposed to each other at a constant pitch. 6. The transmission cable according to claim 4, wherein a groove is formed for mounting the shield member of each of the coaxial cables and an end of the signal line pair. The conductive member comprises a holder extending in a direction in which a plurality of coaxial cables are arranged in parallel. The holder has upper and lower portions which are provided with openings alternately at a constant pitch opposite to each other. 6. The transmission cable according to claim 4, wherein a shield member of each of the coaxial cables and an end of the signal line pair are attached to the portion. In a transmission cable in which the outer periphery of a pair of signal lines covered with a covering material covers the outer periphery of a signal line formed of a conductor, the ends of the shielding material and the pair of signal lines are cut off to expose the signal lines. A transmission cable, wherein a conductive member is put on the ends of the shield member and the signal line pair, and the conductive member is substantially adhered to the end of the connector to connect the signal line pair to the connector. How to connect with the connector. The method according to claim 9, wherein a drain wire is provided in the shield material, and a part of the drain wire is in contact with the conductive member. A transmission cable in which a plurality of coaxial cables in which the outer periphery of a pair of signal lines is covered with a shield material and the outer periphery of a signal line made of a conductor is covered with a covering material is arranged in parallel, the shield material and signal of each of the coaxial cables are arranged. Torn off the ends of the wire pairs and expose the signal lines and cover the shield material of each of the coaxial cables and the ends of the signal line pairs with conductive members, and bring the conductive members into close contact with the ends of the connectors, A connection method between a transmission cable and a connector, wherein one pair of signal lines is connected to the connector. The method of connecting a transmission cable and a connector according to claim 11, wherein a drain wire is provided in a shield material of each of the coaxial cables, and a part of each of the drain wires is in contact with the conductive member.

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