JPH0773931A - Connector for coaxial ribbon cable - Google Patents

Abstract

PURPOSE:To obtain a connector for coaxial ribbon cable which makes in a high density between signal terminals, and generating no cross talk. CONSTITUTION:A substrate side connector B has a shield terminal 6 and gland terminal 7, and the shield terminal 6 of the substrate side connector B is connected to the shield terminal 2 of a cable side connector A. And the gland terminal 7 of the substrate side connector B is composed to be placed and connected between the gland terminal 3 and the gland terminal pin 11 of the cable side connector A, and two sets of shield terminals 2 and 6 of the substrate side connector A and the cable side connector B corresponding to two signal terminal pins 10 and 10 making a pair neighboring each other surround the two signal terminal pins 10 and 10 from all directions. And the system is formed to partition this surrounding space by the gland terminals 3 and 7 between the signal terminal pins 10 and 10, and furthermore, the gland terminal 3 is to be connected to the other neighboring pair of shield terminal 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial ribbon cable connector.

[0002]

2. Description of the Related Art In order to connect a coaxial ribbon cable and a terminal pin mounted on the backside of a board, a cable side connector is connected to the above coaxial ribbon cable, a board side connector is connected to the board, and the board is held in the board side connector. The signal terminal pin and the ground terminal pin of the board are connected to the signal terminal and the ground terminal of the cable side connector, respectively, by coupling the cable side connector and the board side connector.

A cable side connector and a board side connector of this type are disclosed in Japanese Utility Model Laid-Open No. 4-108882. In this known connector, further, by providing a shield terminal connected to the ground terminal between the adjacent signal terminals of the cable side connector, by correspondingly coupling it with the shield terminal of the board side connector. We are trying to reduce the ground noise.

[0004]

However, in the above-mentioned conventional connector for coaxial ribbon cable, when the board-side connector is joined to the board, the signal terminal () formed as a post pin on the back side of the board ( And the ground terminal) are exposed in a wide range between the board and the board-side connector, which causes crosstalk between the signal terminals. Furthermore, the arrangement pitch of the terminal pins on the substrate is usually fixed, and every other pin is used as a signal terminal pin and a ground terminal pin, which makes it difficult to implement higher density mounting.

The present invention solves the above problems, can greatly reduce the crosstalk between the signal terminals with a simple structure, can control the impedance, and can realize a high-density mounting for a coaxial ribbon cable. It is intended to provide a connector.

[0006]

According to the present invention, the above-mentioned object is to receive signal terminal pins and ground terminal pins, which are projected in the back side of the substrate and are arranged in the form of post pins, from one side of the through space and to fix them. A board-side connector to be held, a signal terminal and a shield terminal to which a signal line and a drain wire of the cable are respectively connected, and a ground terminal connected to the shield terminal are provided to the through space of the board-side connector. A cable side connector that is inserted from the side, and when the cable side connector is inserted into the board side connector, the signal terminal pin and the ground terminal pin of the board correspond to the signal terminal and the ground terminal of the cable side connector, respectively. The connector on the board side includes a shield terminal and a ground terminal. Shield terminal of the substrate-side connector is connected to the shield terminal of the cable-side connector,
Also, the board-side connector is configured so that the ground terminal of the board-side connector is interveningly connected between the ground terminal and the ground terminal pin of the cable-side connector, and corresponds to two adjacent signal terminal pins that make a pair. And two sets of shield terminals of the cable-side connector surround the two signal terminal pins from four sides, and a ground terminal is formed so as to partition the surrounding space between the two signal terminal pins, and further, the ground. This is achieved by the fact that the terminal is adapted to connect with another pair of adjacent shield terminals.

[0007]

In the present invention having such a structure, when the board-side connector into which the cable-side connector of the present invention is fitted is coupled with the terminal pin of the board, the signal terminal pin of the board is the same as that of the conventionally exposed cable-side connector. The area up to the connection position with the signal terminal is completely surrounded by the shield terminal and the ground terminal of the cable side connector and the board side connector. The shield terminal is connected to the ground terminal pin via the ground terminal of the cable connector and the ground terminal of the board-side connector. Since the tip of the ground terminal pin extends only in the longitudinal direction to the position where the tip is connected to the lower part of the ground terminal of the board-side connector, the board-side connector and the cable are placed in a space above them, that is, in the same arrangement position. The ground terminal of the side connector can be arranged. As a result, all the signal terminal pins of the substrate arranged at the pitch conventionally used can be used as the signal terminals, and a short pin may be planted between the signal terminal pins as the ground terminal. Thus, high-density mounting is realized.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the cable side connector, the board side connector and the respective terminals of the board taken out,
2 is a perspective view showing the terminal of the cable side connector and the ground terminal of the board side connector among the terminals of FIG. 1, and FIG.
III-III line cross-sectional view of the cable side connector, board side connector and board, FIG. 4 shows the state in which the connector of FIG. 3 is incorporated, FIG. 5 is a sectional view taken along line VV of FIG.
6 is a sectional view taken along line VI-VI of FIG. 4, FIG. 7 is a sectional view taken along line VII-VII of FIG. 4, and FIG. 8 is a connection system diagram of the connector of FIG.

(A) The cable side connector A has a signal terminal 1, a shield terminal 2 and a ground terminal 3 which are formed by punching and bending a metal plate member.

As shown in FIG. 1, two signal terminals 1 are arranged facing each other in the X direction and are alternately arranged in the Y direction with shield terminals 2 described later. One signal terminal 1 has a pressure contact groove 1 that extends downward from the V-shaped groove at the top.
A pressure contact portion 1B having A is formed, and a contact portion 1C that is bent and extends downward is formed at a lower portion of the pressure contact portion 1B. The contact portion 1C has an elastic tongue shape, and is curved in an arc shape at the lower end portion to facilitate elastic contact.

A shield terminal 2 is arranged between two signal terminals 1 and 1 arranged in the Y direction and facing each other. The shield terminal 2 is connected in the X direction, and has pressure contact portions 2B having pressure contact grooves 2A similar to the signal terminal 1 at both ends in the same direction. The portion connecting the press contact portions 2B to each other forms a reverse U leg-shaped shield portion 2C extending downward in the XZ plane. The outer lower edge of the shield portion 2C is rounded to obtain a smooth contact.

A ground terminal 3 is arranged between the contact portions 1C, 1C of the two signal terminals 1, 1 arranged opposite to each other in the X direction. The ground terminal 3 extends downward in the YZ plane so as to be substantially parallel to the contact portion 1C, has connection leg portions 3A in the lower portion, and is bent in the X direction after protruding in the Y direction on both upper side portions. It has a contact finger portion 3B. The contact finger portion 3B is the shield portion 2C of the shield terminal 2 adjacent to each other.
Has elastic contact with the upper part of.

As shown in FIG. 3, the cable-side connector A has the contact portions so that the pressure contact portions 1B and 2B of the signal terminal 1, the shield terminal 2 and the ground terminal 3 project into the upper recess of the insulating housing 4 as shown in FIG. 1C, shield part 2C
And the supporting wall portion 4A in which the connecting leg portion 3A projects into the lower concave portion
Holds to be supported by.

(B) The board-side connector B has a shield terminal 6 and a ground terminal 7 held by an insulating housing 5, and a cap 8 is attached to the insulating housing 5 from below.

The shield terminals 6 are arranged so as to correspond to the respective signal terminals 1 of the cable side connector A and to be located therebelow. That is, the two shield terminals 6 are provided so as to face each other in the X direction. The shield terminal 6 has a shield portion 6A having a U-shaped cross section in the lower portion, and a flat tongue piece 6B and a "ku" shape from the upper end of the shield portion 6A.
A bent tongue 6C having a letter shape extends upward. The flat tongue piece 6B is inserted from below into the support groove of the housing 5 to hold the shield terminal 6, and the bent tongue piece 6C is used when the cable side connector A and the board side connector B are assembled. In addition, it is for contacting the edge of the shield portion 2C of the cable side connector A. The shield terminal 6 has a U-shaped cross section 6A.
Has a contact finger portion 6D that projects obliquely upward from the lower portion of the.

A ground terminal 7 is arranged between the two shield terminals 6 and 6 arranged to face each other in the X direction.
The ground terminal 7 is provided with a thin connecting portion 7B extending upward from the upper end of a flat plate portion 7A extending in the Z direction on the YZ plane. The connecting portion 7B is 90 ° about the Z axis at the base.
It is twisted. The connecting portion 7B is inserted into the groove of the connecting leg portion 3A formed in the ground terminal 3 of the cable-side connector A when the cable-side connector A and the board-side connector B are assembled, and is connected. . Further, an inverted T-shaped leg portion 7C extends from the lower end of the flat plate portion 7A. Both ends of the leg portion 7C in the Y direction extend in opposite directions while being bent in a crank shape, and a contact portion 7D extending obliquely upward from the tip thereof is provided. The ground terminal 7
The contact portion 7D of the contact terminal 6D of the shield terminal 6 in the X direction.
It is located at a position facing D, and its extension height (length in the Z direction)
Is lower than the contact portion 6D.

The shield terminal 6 and the ground terminal 7 formed in this manner have a contact portion 6 provided at their lower ends.
The other contact portions 6D and 7 that D and 7D face each other.
Together with D, the throat portions 6E and 7E are formed at two upper and lower positions.

The shield terminal 6 and the ground terminal 7 are
Above the insulating housing 5 that receives the cable-side connector A, the bent tongue piece 6C and the connecting portion 7B are arranged so as to be exposed, and the portion below the shield portion 6A and the flat plate portion 7A projecting downward of the insulating housing 5. However, it is covered with a cap 8 having a window hole 8A at the bottom for inserting and guiding the signal terminal pin and the ground terminal pin of the substrate described later.

(C) A signal terminal pin 10 and a ground terminal pin 11 are planted on the substrate 9. Signal terminal pin 1
0 is at a constant pitch position in the form of a lattice, and this pitch is, for example, 2.54 mm as widely used in the past. The ground terminal pin 11 is located at the center position of the four signal terminal pins 10 adjacent to each other in the XY directions, and is shorter than the signal terminal pins 10.

The signal terminal pin 10 is located in the XY direction at a position corresponding to the contact portion 1C of the signal terminal of the cable side connector A, and the ground terminal pin 11 is the shield terminal 6 and the ground terminal 7 of the board side connector B. Contact part 6
It is located at a position corresponding to the throat portions 6E and 7E formed by D and 7D. The ground terminal pin 11 is connected to the throat 6
The length is limited to reach E, 7E.

A connector 12 for connection is attached to the lower surface of the substrate 9.

(D) The coaxial ribbon cable connector of this embodiment having such a configuration is assembled and functions as follows.

A signal wire (not shown) of the ribbon cable is pressure-connected to the pressure-contact portion 1B of the signal terminal 1 of the cable-side connector A, and the core wire thereof is pressure-contacted with the edge of the pressure-contact groove 1A. The drain wire (not shown) of the ribbon cable is also pressure-bonded at the pressure-contact portion 2B of the shield terminal 2.

After the above-mentioned pressure connection, the cable side connector A is incorporated into the board side connector B and is connected to the board 9. The combined state is as shown in FIG.

The contact portion 1C of the signal terminal 1 of the cable side connector A is a signal terminal pin 1 penetrating the board side connector B.
0 comes into elastic contact with the upper end portion of 0, and the shield portion 2C of the shield terminal 2 of the cable side connector A receives the elastic contact of the bending tongue piece 6C of the shield terminal 6 of the board side connector B at its side edge. Like Further, the connection portion 7B of the ground terminal 7 of the board-side connector B is inserted into the connection leg portion 3A of the ground terminal 3 of the cable-side connector A and connected to each other.

On the other hand, the ground terminal pin 11 of the board 9 is inserted into the throat portions 6E, 7E formed by the shield terminal 6 and the ground terminal 7 of the board-side connector B, and is connected to the shield terminal 6 and the ground terminal 7. It

FIG. 8 is a schematic diagram showing the connection between the terminals. In FIG. 8, the signal line of the ribbon cable is indicated by S and the drain line is indicated by D.

In this way, the connector of this embodiment, which is assembled and the terminals are connected, is shown in FIGS.
As can be seen, the two signal terminal pins 10, 10 forming a pair adjacently are surrounded on all sides by the shield terminals 2, 6 at any cross-section position, and the two signal terminal pins 10, 10 are also surrounded. Since the ground terminals 3 and 7 exist between them, each signal terminal pin 10 is shielded completely independently. 5 to 7, the arrow shows FIG.
The position corresponding to the cross section at is shown.

Moreover, since the ground terminal pin 11 is formed to be short and there is no problem in disposing the ground terminals 3 and 7 above the ground terminal pin 11, an additional space is required for disposing the ground terminal. Instead, all the signal terminal pins 10, which have been conventionally used as ground terminal pins for every other line, can be used as signal terminal pins.

Further, as shown in the figure, the terminals form a microstrip line, impedance matching is performed, and the signal terminals are almost completely shielded, so that crosstalk is drastically reduced.

The invention is not limited to the illustrated embodiment. For example, without enclosing the signal terminal pin from the three sides with a shield terminal having a U-shaped cross section from the three sides and covering the other one with a ground terminal, the shield terminal and the ground terminal have an L-shaped cross section. As a thing, you may make it enclose two each.

[0033]

As described above, according to the present invention, it is possible to use all the terminal pins implanted in the conventional board at a predetermined pitch as the signal terminal pins, so that the high density mounting can be achieved. Further, since the ground terminal can be arranged between the two signal terminals which are paired adjacent to each other, a microstrip line structure is formed and impedance matching is performed. Also, the crosstalk will be drastically reduced.

Further, since each ground terminal and the shield terminal are connected to the ground pin as well, these terminals form a feedback circuit, and the effect of reducing the ground inductance and the earth noise is also obtained. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention in a state where a cable-side connector, a board-side connector, and each terminal of a board are taken out.

FIG. 2 is a perspective view showing a terminal of a cable side connector and a ground terminal of a board side connector among the terminals of FIG.

3 is a diagram of a cable-side connector, a board-side connector, and a board shown in a cross section taken along line III-III in FIG.

FIG. 4 is a diagram showing a state in which the connector of FIG. 3 is incorporated.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a connection system diagram of the connector of FIG.

[Explanation of symbols]

 1 signal terminal 2 shield terminal 3 ground terminal 6 shield terminal 7 ground terminal 9 board 10 signal terminal pin 11 ground terminal pin A cable side connector B board side connector D drain wire S signal wire

Claims (1)

[Claims] 1. A board-side connector that receives a signal terminal pin and a ground terminal pin, which are arranged in the form of post pins and project from the back side of the board, from one side of the through space and hold them, and a signal line and a drain of a cable. A signal side and a shield terminal to which the wires are respectively connected, and a cable side connector having a ground terminal connected to the shield terminal and inserted from the other side into the through space of the board side connector, A connector in which the signal terminal pin and the ground terminal pin of the board and the signal terminal and the ground terminal of the cable side connector are electrically connected to each other when the cable side connector is fitted into the board side connector, respectively. The connector has a shield terminal and a ground terminal, and the shield terminal of the board-side connector is the above-mentioned case. Of the board-side connector, and the ground terminal of the board-side connector is connected between the ground terminal of the cable-side connector and the ground terminal pin. Two sets of shield terminals of the board-side connector and the cable-side connector corresponding to the signal terminal pins surround the two signal terminal pins from four sides, and a ground terminal surrounds the surrounding space between the two signal terminal pins. A coaxial ribbon cable connector, characterized in that it is formed so as to be partitioned, and that the ground terminal is connected to another pair of shield terminals adjacent to each other.