JP2003346987A - Cable assembly with connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable assembly with a connector having a stable electric characteristic. <P>SOLUTION: This cable assembly with a connector has a cable assembly of a plurality of cables 5, and a connector connected with the cables. Each cable has at least two signal wires 15, 17 comprising a core wire and an insulator, a drain wire 21, and a shield. When the orthogonal direction of an extension axis is designated as an X-axis direction in an XY plane defined by the extension axis of the signal wire, the drain wire is arranged between the signal wires in the X-axis direction. At a cable end with the shield removed, each signal wire has insulating parts 43, 45 coated with the insulator, and exposure parts 47, 49 with core wires exposed. Each drain wire has a crossing part 51 crossing the insulating part of the adjacent signal wire and extending in the X-axis direction, and a parallel part 53 extending in a Y-axis direction from the crossing part towards tip end. Each exposure part and the parallel part are connected with corresponding terminals of the connector. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective cable with a connector, and more particularly to a collective cable with a connector in which a plurality of cables each having two signal lines and a drain wire are connected to a connector.

[0002]

2. Description of the Related Art Conventionally, a collective cable having a plurality of cables has been used as a display cable for transmitting an image signal between a CPU of a personal computer and a display. 2. Description of the Related Art In recent years, liquid crystal displays have become widespread, the number of pixels and the number of colors have increased, and the volume of image information handled has also increased. Accordingly, a high-speed transmission cable capable of transferring a large amount of image data at a required data rate has been used as a display cable.

As a general high-speed transmission cable, a twin-ax cable compatible with high-speed differential transmission is known.
Twin-ax cables are arranged side by side in parallel with each other.
It has a signal line, a shield covering the outer periphery thereof, and a drain wire arranged in parallel with the two signal lines and in contact with the inside of the shield. The twin-ax cable has a feature that the drain wire is provided at a position where the distance from the two signal lines is substantially equal, so that the balance is very good. Further, it can be easily manufactured by attaching a drain wire to a groove formed by contacting two signal lines. However, such a positional relationship between the signal line and the drain wire does not correspond to an arrangement of terminals of a general connector.

[0004]

FIG. 8 shows the structure of the Twin-a
1 shows a conventional method of connecting an x-cable to a connector terminal. As shown, the drain wire 21 is connected to the cable 5.
In the shield 19 between the two signal lines 15 and 17. On the other hand, a drain wire terminal 39 for connecting the drain wire 21 is connected to each signal line 15, 1
7 are located outside the signal line terminals 35 and 37 (the right side in the figure) for connection. Therefore, it is necessary to cross the drain wire 21 and the adjacent signal line 17 in order to connect each to the corresponding terminal.

[0005] However, when the drain wire 21 crosses the adjacent signal line 17 in an oblique direction, the core wire 23 of the adjacent signal line 17 approaches or comes into contact with the drain wire 21 as shown in FIG. The impedance of the core of the signal line is reduced by approaching the drain wire, and a short circuit is caused by the contact. In order to avoid such approach or contact, it is conceivable to remove the shield 19 at the ends of the signal lines 15 and 17 to extend the length covered by only the insulator 25. However, the portion not covered by the extended shield 19 has a higher magnetic field strength than the portion covered by the shield 19, and the induced voltage becomes larger, so that there is a problem that crosstalk occurs.

An object of the present invention is to provide a collective cable with a connector which is effective in solving the above-mentioned problems.

[0007]

An object of the present invention is to provide a collective cable with a connector having a collective cable having a plurality of cables and a connector connected to the collective cable, wherein each of the cables has at least two cables. At least two signal lines, each of which is a signal line, each including a core wire and an insulator covering the core wire, a drain wire, and a shield that bundles and covers each of the signal lines and the drain wire in parallel, When a direction orthogonal to the stretching axis in an XY plane defined by a stretching axis of at least two signal lines arranged in parallel is an X-axis direction,
The drain wire is arranged between the signal lines in the X-axis direction, each of the cables has a cable end from which the shield is removed, and each of the signal lines is an insulator at the cable end. And an exposed portion where the core wire is exposed, and each of the drain wires crosses the insulating portion of the adjacent signal line at the end of the cable and extends in the X-axis direction. And a parallel portion extending in the Y-axis direction from the intersection to the distal end side, wherein each of the signal lines is connected to a corresponding terminal of the connector at the exposed portion, and each of the drain wires is This is achieved by a collective cable with a connector connected to the corresponding terminal of the connector at the parallel portion.

Preferably, the length of the insulating portion in the Y-axis direction is 0.5 mm to 1.0 mm.

Preferably, the collective cable is 2.5
This is a high-speed transmission cable capable of transmitting high-speed differential signals of Gbps or more.

The cable is, for example, Twin-ax
Cable.

It is preferable that the intersection has a bent portion in a predetermined XZ plane defined by a Z axis perpendicular to the XY plane and the X axis.

It is preferable that the parallel portion is disposed in a predetermined XY plane on which the exposed portion is disposed.

It is preferable that the exposed portion and the parallel portion are arranged at the same interval as the corresponding terminal of the connector in the X direction.

The intersection may have a curved portion that curves along the outer peripheral curved surface of the insulating portion in the predetermined XZ plane.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a collective cable with a connector according to the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is an external view showing a terminal portion of the cable with connector of the present invention. FIG.
FIG. 2 is a sectional view taken along line II-II of FIG. 1. FIG. 3 is a sectional view taken along the line III-III in FIG.
It is a line sectional view. FIG. 4 is a partial detailed view of a range IV in FIG. FIG. 5 is a side view seen from the direction of arrow V in FIG. FIG. 6 is a side view as seen from the direction of arrow VI in FIG.
FIG. 7 is a side view showing a second embodiment of the drain wire intersection.

As shown in the figures, this embodiment generally includes a collective cable 1 having a plurality of cables 5;
A collective cable with a connector having a connector 3 connected to the collective cable 1;
Represents at least two signal lines 15 and 17, each of which comprises a core wire 23 and an insulator 25 covering the core wire 23, and a drain wire 2
1, each of the signal lines 15, 17 and the drain wire 2
At least two signal lines 15 and 17 arranged in parallel with each other.
When the direction orthogonal to the stretching axis in the XY plane defined by the stretching axis is defined as the X-axis direction, the drain wire 21 is connected to the signal lines 15 and 1 in the X-axis direction.
7, each cable 5 has a cable end 41 from which the shield 19 has been removed, and each signal line 15, 17 is covered with an insulator 25 at the cable end 41. The drain wires 21 straddle the insulating portions 45 of the adjacent signal lines 17 at the cable end portions 41. And a crossing portion 51 extending in the X-axis direction and a parallel portion 53 extending in the Y-axis direction from the crossing portion 51 toward the distal end.
7 is connected to the corresponding terminals 35 and 37 of the connector 3 at the exposed portions 47 and 49, and the drain wires 21 are connected to the corresponding terminals 39 of the connector 3 at the parallel portions 53. It is a collective cable with.

Preferably, the length of the insulating portion 45 in the Y-axis direction is 0.5 mm to 1.0 mm.

Preferably, the collective cable 1 comprises:
This is a high-speed transmission cable capable of transmitting high-speed differential signals of 5 Gbps or more.

The cable 5 is, for example, Twin-a
x cable.

The intersection 51 preferably has a bent portion 55 in a predetermined XZ plane defined by the Z axis perpendicular to the XY plane and the X axis.

The parallel portion 53 is provided with the exposed portions 47 and 49.
Are preferably arranged in a predetermined XY plane in which is arranged.

The exposed portions 45 and 47 and the parallel portion 5
3 indicates a corresponding terminal 3 of the connector 3 in the X direction.
It is preferable to be arranged at the same interval p as 5, 37, 39.

The crossing portion 51 may have a curved portion 61 which curves along the outer peripheral curved surface of the insulating portion 45 in the predetermined XZ plane.

More specifically, it is as follows.

As shown in FIG. 1, the collective cable with a connector includes a collective cable 1 and a connector 3 connected to the collective cable 1.

As shown in FIG. 2, the collective cable 1 has a plurality of cables 5 and an outer covering layer 7 for covering the outer periphery of the plurality of cables 5. The plurality of cables 5 are bundled in a parallel or twisted manner inside the outer coating layer 7. In the illustrated example, the outer coating layer 7 includes a bind tape 9, a braided shield 11, and a jacket 13 from the inside.

As shown in FIG. 3, each cable 5
The signal line 15, the second signal line 17, and the shield 19 covering the outer periphery of the first and second signal lines 15, 17 together
And a drain wire 21 for connecting the shield 19 to the ground.

Each of the first and second signal lines 15 and 17 has a core 23 and an insulator 25 that individually covers the core 23. The core wire 23 has, for example, a conductor size of AWG2.
6 (0.40 mm in diameter) made of a single AgA conductor. The insulator 25 has, for example, a thickness of 0.36 mm and an outer diameter of 1.12 m.
m of expanded polyethylene. Drain wire 21
Is made of, for example, a single AgA conductor having a conductor size of AWG28 (diameter 0.32 mm). The shield 19 is made of, for example, aluminum mylar tape.

The two signal lines 15 and 17 of each cable 5
Are arranged in the shield 19 so as to be parallel and in contact with each other. Hereinafter, the direction of the extension axis of the first and second signal lines 15 and 17 arranged in parallel is defined as the Y-axis direction,
A plane defined by the stretching axes is an XY plane. That is, the X-axis direction is a direction orthogonal to the extension axis of the first and second signal lines 15 and 17 in the XY plane. The Z-axis direction is a direction perpendicular to the XY plane.

As shown, the drain wire 21 is arranged in parallel with the first and second signal lines 15 and 17 and at the same distance from the first and second signal lines 15 and 17. That is, the drain wire 21 is arranged between the first and second signal lines 15 and 17 in the X-axis direction.

The cable 5 is, for example, a Twin-ax cable. Twin-ax cables have low skew (difference in delay time) and good balance. Therefore, the collective cable 1 is a high-speed transmission cable capable of transmitting a high-speed differential signal of, for example, 2.5 Gbps or more.

Referring to FIG. 1 again, the connector 3 has a connector board 31 and a connector housing 33 that houses the connector board 31. The connector board 31 has a plurality of first signal line terminals 35, a plurality of second signal line terminals 37, and a plurality of drain wire terminals 39. First and second
The signal line terminals 35 and 37 correspond to the first and second signal lines 15 and 17 of each cable 5, respectively. The drain wire terminals 39 correspond to the drain wires 21 of each cable 5, respectively.

As shown in FIG. 1, the first and second signal line terminals 35 and 37 and the drain wire terminal 39 are arranged in a predetermined order for each corresponding cable 5. At this time, the first and second signal line terminals 35 and 37 are adjacent to each other. Further, the drain wire terminal 39 is provided outside the position of the first and second signal line terminals 35 and 37. For example, the terminals 35, 37, 39 in FIG.
Are the first signal line terminal 35, the second signal line terminal 37,
Drain wire terminals 39 are arranged in the order of each cable 5. The terminals 35, 37, and 39 are usually provided on the connector board 31 at equal intervals p. The interval p is preferably between 1.0 mm and 1.5 mm.

As shown in FIG. 4, the cable 5 has a cable end 41 with the shield 19 removed. Each signal line 15, 17 is connected to the insulator 25 at the cable end 41.
And the exposed portions 47 and 49 where the core wire 23 is exposed. First and second signal lines 1
5 and 17 are connected to corresponding first and second signal line terminals 35 and 37 at the exposed portions 47 and 49, respectively.

On the other hand, the drain wire 21 is connected to the insulating portion 45 of the adjacent second signal line 17 at the cable end 41.
Crossing part 51 extending in the X-axis direction,
And a parallel portion 53 extending in the Y-axis direction toward the distal end side of the signal lines 15 and 17 from. The drain wire 21 is connected to the corresponding drain wire terminal 39 at the parallel portion 53. Thereby, the first and second signal lines 15, 17 and the drain wire 21 are joined to the corresponding terminals 35, 37, and 39 without bringing the drain wire 21 into contact with the core wire 23 of the second signal line 17. Can be.

Preferably, the length L in the Y-axis direction of the insulating portions 43, 45 of the signal lines 15, 17 is 0.5 mm or more. Thereby, the drain wire 21 can be extended in the X direction so as not to contact or approach the adjacent signal line 17. Preferably, Y of the insulating portions 43 and 45 is used.
The length L in the axial direction is 1.0 mm or less. As a result, it is possible to prevent crosstalk between the first and second signal lines 15 and 17 even in high-speed transmission of 2.5 Gbps or more by the collective cable 1.

As shown in FIG. 5, preferably, the parallel portion 53 of the drain wire 21 is connected to the first and second signal lines 1.
5 and 17 are arranged on the same plane as the exposed portions 47 and 49.
In addition, as shown in FIG.
The exposed portions 47 and 49 of the signal lines 15 and 17 and the parallel portions 53 of the drain wires 21 are arranged at the same interval p as the corresponding terminals on the connector board 31. Thereby, the first and second signal lines 15 and 17 and the drain wire 21 can be connected to the corresponding terminals 35, 37 and 39 at once.

As shown in FIG. 6, a crossing portion 51 of the drain wire 21 has an inverted V-shape having a bent portion 55 as an apex in an XZ plane crossing the insulating portions of the first and second signal lines 15 and 17. It preferably has the shape of a mold. Accordingly, the intersection 51 and the parallel portion 53 can be easily formed on each drain wire 21 by a simple operation of bending the bent portion 55 and both ends 57 and 59 of the intersection 51 with tweezers or the like.

As shown in FIG. 7, the intersection 51 of the drain wire 21 is located on the XZ plane intersecting the insulation of the first and second signal lines 15 and 17, and the insulation of the second signal line 17 adjacent thereto. Bending portion 6 that curves along the outer peripheral curved surface of 45
It may have one.

As described above, the collective cable with the connector has the following effects.

It is possible to prevent adverse effects on electrical characteristics due to contact or approach between the drain wire and the core of the signal line.

In a high-speed transmission cable, occurrence of crosstalk can be prevented.

By forming the drain wire, the end of the drain wire can be positioned at a position where it can be connected to the connector board together with the signal line.

The drain wire can be easily formed.

[0045]

Therefore, according to the embodiment of the present invention, it is possible to provide a collective cable with a connector having stable electric characteristics.

[Brief description of the drawings]

FIG. 1 is an external view showing a terminal portion of a cable with a connector according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a partial detailed view of a range IV in FIG. 1;

FIG. 5 is a side view as seen from the direction of arrow V in FIG. 4;

FIG. 6 is a side view as seen from the direction of arrow VI in FIG. 5;

FIG. 7 is a side view showing a second embodiment of a drain wire intersection.

FIG. 8 is a partial detailed view showing a conventional example of a cable end connected to a connector terminal.

[Explanation of symbols]

1 Collective cable 3 Connector 5 Cable 7 outer coating layer 9 Bind tape 11 Braided shield 13 jacket 15, 17 signal line 19 Shield 21 Drain wire 23 core wire 25 Insulator 31 Connector board 33 Connector housing 35, 37 signal line terminal 39 Drain wire terminal 41 Cable end 43, 45 insulation 47, 49 Exposed part 51 intersection 53 parallel part 55 Bend 57, 59 Both ends of intersection 61 curved part

Claims (3)

[Claims] 1. A collective cable with a connector, comprising: a collective cable having a plurality of cables; and a connector connected to the collective cable, wherein each of the cables is at least two signal wires, each of which is a core wire. And at least two signal lines made of an insulator covering the same, a drain wire, and a shield that bundles and covers each of the signal lines and the drain wire in parallel, wherein the at least two signal lines and the drain wire are arranged in parallel. When the direction connecting the center lines of the signal lines is the X-axis direction, the drain wire is disposed between the signal lines in the X-axis direction, and each of the cables is a cable end from which the shield is removed. Wherein each of the signal lines has, at the end of the cable, an insulating portion covered with an insulator, and an exposed portion from which a core wire is exposed; Inwaiya, in the cable end,
A crossing portion extending in the X-axis direction across the insulating portion of an adjacent signal line; and a parallel portion extending in the Y-axis direction from the crossing portion toward the distal end, wherein each of the signal lines includes the exposed portion and And the drain wire is connected to a corresponding terminal of the connector at the parallel portion. 2. The length of the insulating portion in the Y-axis direction is 0.5
The collective cable with a connector according to claim 1, which has a thickness of 1.0 mm to 1.0 mm. 3. The collective cable with a connector according to claim 1, wherein the collective cable is a high-speed transmission cable capable of transmitting a high-speed differential signal of 2.5 Gbps or more.