JPH0145948B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows a group of contacts to penetrate the insulation coating of a flat cable, and as a result of the penetration, conductive groups within the insulation coating are captured by the group of contacts to obtain an electrical connection and connect each conducting wire. Regarding a connector for connecting a flat cable that forms signal lines according to To provide a connector for connecting a flat cable that makes it possible to form a ground line group.

A multicore flat cable is a cable that has a flat portion in which a large number of parallel conducting wires are enclosed in a band-shaped insulating coating over at least a portion of the entire length of the cable.

For example, flat ribbon cables include flat ribbon cables in which the conductors are arranged parallel to each other along the entire length of the cable and covered with an insulating sheath, and flat ribbon cables in which the conductors are arranged in parallel over the entire length of the cable, and flat ribbon cables are made up of many pairs of conductors in parallel and covered with a band-shaped insulating sheath. There is a type of twist-flat cable in which each pair of conductor wires is untwisted and rearranged into parallel conductors for connection in the connector mounting area.

The connector according to the present invention can be applied to a multi-core flat cable as exemplified above.

If the multiple conductors of the above flat cable are used alternately as signal conductors and ground conductors, and the ground conductor is placed adjacent to each signal conductor, electrical interference between the signal conductors, that is, crosstalk, can be avoided. It is known to prevent this and improve the transmission characteristics in each signal conductor.

The present invention makes it possible to form a first signal line at one end of the same cable and a second signal line at the other end using a single uncut flat cable, and at the same time form a ground line adjacent to the signal line. We provide a new connector that enables

Furthermore, the present invention provides a connector that enables the above-mentioned line configuration with the same simple work as the conventional method of attaching a single connector to a single cable terminal.

6A to 6D are embodiment diagrams showing the principles of the connector structure according to the present invention and the patterns of the first and second signal lines and the ground line achieved by the connector, and FIG. 5 to 5 show a specific example of the connector illustrated in FIG. 6C as a representative example. In each figure, the same number indicates the same part.

In the figure, 1 is a connector, 2A is a large number of first signal contacts arranged in the width direction of the flat cable, 2B is a second signal contact, and 3 is a grounding contact.
4 shows a multicore flat cable connected to the same connector 1, and all three groups of grounding contacts are integrally erected in double rows or single rows from a common grounding motherboard 3A and are attached to the connector base. Furthermore, all the two groups of signal contacts are each independently installed on the connector base 1a.

In order to facilitate understanding, the explanatory diagrams in FIGS. 6A to 6D show fewer cores of the flat cable 4, and the first and second signal contacts 2A and 2B are shown as white circles, and the grounding contact 3 is shown as a black circle. In order to clearly distinguish between the signal conductor and the ground conductor in the drawings, the ground conductor is shown with a satin pattern.

the first and second signal contacts 2A, 2B;
The grounding contact 3 has at least a pair of contact pieces 2a, 3a with sharp tips, and U-shaped slots 2b, 3b are formed between both the sharp contact pieces. In the first and second signal contacts 2A and 2B, a male terminal 2c is further provided hanging from the lower end of the double-pointed contact piece 2a, the male terminal 2c protrudes below the connector board 1a, and the contact piece 2a extends above the board. It is planted on the same base 1a so as to protrude.

On the other hand, in the ground contact 3, the lower end of the sharp contact piece 3a is integrally connected to the common ground base plate 3A, and the common ground base plate 3A is fixed in the center of the base plate 1a, and the sharp contact piece 3a is placed above the base plate. 6A to D in the pattern shown in FIG.
The second signal contacts 2A, 2B and the ground contact 3 are arranged in parallel.

The first signal contact 2A group is connected to the second signal contact 2A in the left side area of the connector base 1a.
Group B is arranged on the right side area of the board, and the ground motherboard 3A is located in the center of the board 1a, that is, the first signal contact 2A group and the second signal contact 2B group.
The mounting hole 3 is fitted into the recess 1g formed between the rows of the groups in the cable width direction, and is drilled in the mother plate 3A.
c into the protrusions 1h set on the bottom wall of the recess 1g, and a large number of rack-shaped protrusions 1i at the same pitch as the spacing of the grounding contacts 3 in the cable width direction on the left and right inner walls of the recess 1g. arranged in parallel, each of the protrusions 1i
is fixed in place by intervening in the spacing between the respective grounding contacts 3.

The connector 1 is composed of the connector base 1a and the connector cover 1b, each of which has an insulating board as its base, and the flat cable 4 is tightly sandwiched between the base 1a and the cover 1b.
By assembling the contacts a and 1b integrally, the first and second signal contacts 2A, 2B groups and the third group of grounding contacts penetrate the insulation coating 4c of the cable 4, and their tips are connected to the contacts 2A, 2B, 3. The contact insertion holes 1c are inserted into the groups of contact insertion holes 1c of the cover 1b corresponding to the arrangement of each group.

In the same state, locking means 1e and 1f are engaged with each other on the outside of both ears of the cable to integrate the cover 1b and the base 1a.
It is provided at both ends of a.

As shown in each of the embodiments shown in FIGS. 6A to 6D, the connector 1 is attached to one end of the flat cable 4 in the middle of the length of the flat cable 4.
a and the other end 4b are respectively extended outside the connector mounting area 4d.

As described above, the flat cable 4 has a large number of parallel conductors 4e arranged at regular intervals, and each parallel conductor 4e
extends inside the strip-shaped insulating coating 4c.

A plurality of punch holes 5 are bored in the insulation coating 4c of the flat cable 4 in the connector mounting area 4d to cut a plurality of conductive wires.

The punching hole 5 is formed by cutting out the insulation coating 4c and the conductor 4e in a certain area in the length direction of the conductor (press punching) in the pattern shown in FIGS. 6A to 6D.
Alternatively, although not shown, a cut may be made and an insulating spacer raised or lowered from the connector base 1a or the cover 1b may be inserted into the cut.

As described above, all or part of the conductive wire 4e is inserted into the insulation coating 4 through each hole 5 penetrating the insulation coating 4c.
A state is formed in which the conductive wire is cut while being extended into the flat cable 4, and the conductive wire is separated from the one end conductor extending toward the one end 4a side of the flat cable 4 with the cutout hole 5 as a border, and the other end toward the 4b side. It is separated into a single-lead conductor that extends toward.

Each of the thus formed one-way single-pulled conductor wire, the other-direction single-pulled conductor wire, and each non-perforated conductor wire is connected to the first signal contact 2A group and the second signal contact group of the connector 1 attached to the connector mounting area 4d. A capture connection is made using the contact 2B group and the grounding contact 3 group.

The signal conductor separated by the punch hole 5 by the above
A bidirectional signal line is completed by developing the first signal line group in the Sa group and the second signal line in the Sb group in a pattern as shown in FIGS. 6A to 6D.

As mentioned above, with this connector structure, it is possible to form two different signal line groups at one end and the other end of a single flat cable 4, and at the same time, it is possible to form two different signal line groups at one end and the other end of the flat cable 4. Conductor Sa,
It is possible to form a pattern in which Sb and ground conductive wires G, Ga, and Gb are adjacent to each other.

The first and second signal contacts 2A and 2B groups and the three groups of grounding contacts are all of the type that pierce through the insulation coating 4c of the flat cable 4 and tightly pinch the conductor wire inside the coating to make a connection. used. A fork-shaped contact is generally known as such a contact.

Contacts 2 and 3 indicated by black circles and white circles in FIGS. 6A to 6D represent the fork-shaped contacts described above.

Due to the above contact structure, the connector is firmly attached to the connector attachment area 4d of the flat cable 4, and the connection state of the above-mentioned signal line and ground line conductors Sa, Sb, G, Ga, and Gb is maintained. .

The connector mechanism shown in each of the embodiments shown in FIGS. 6A to D above is specifically illustrated in the embodiment shown in FIGS. 1 to 5 above, which corresponds to the embodiment shown in FIG. 6C, which is shown as a representative example. This can be understood by referring to the connector mechanism.

That is, based on the mechanism explained in FIGS. 1 to 5 above, a connector 1 is prepared in which the arrangement of contacts 2A, 2B, and 3 corresponds to each embodiment shown in FIGS. 6A, B, and D, Each contact 2A, 2B, 3
The sharp contact pieces 2a, 3a of the group pierce the insulation coating 4c of the cable 4, and the U-shaped slots 2b, 3b are inserted.
By press-fitting and capturing conductive wires Sa and Sb for signal lines or conductive wires G, Ga, and Gb for ground lines and obtaining pressure contact, bidirectional signal lines of each pattern are formed at both ends of the cable.

In each of the embodiments shown in FIGS. 6A, B, and C, a unidirectional single-lead conductor extending toward one end of a flat cable 4 separated by a punch hole 5 is used as a signal conductor.
This is captured and connected by the first signal contact 2A group inserted into the end of the punched hole side to form the first signal line, and the other direction single-lead conductor extending toward the other end. A case is shown in which a signal conducting wire Sb is captured and connected by a group of second signal contacts 2B that are pierced to the end on the side of the punched hole to form a second signal line.

Therefore, in each embodiment, the first signal contact 2A and the second signal contact 2B are connected to the through hole 5.
Face directly with

Further, in each of the above embodiments, different signal lines are formed at one end and the other end of the single flat cable 4, and at the same time, the conductor Sa for the first signal line and the conductor Sb for the second signal line are formed. (FIG. 6A, C) or adjacent to one side (FIG. 6B) with a non-perforated conductor, and an insulating coating extending between the holes of the non-perforated conductor. The grounding contact 3 provided on the connector 1
The first signal line group on one end of the flat cable 4 is formed by the group of signal conductors Sa, and the second signal line on the other end is formed by the group of signal conductors Sb. A ground line G group is formed which is shared by the line group. The arrangement of the signal and ground contact groups described in each embodiment is not limited to the arrangement between all of the many conductive wires.

In the embodiment shown in FIG. 6C, the grounding contact 3 connected to the free conducting wire portion 4f existing between the two parallel holes does not contribute to the formation of the signal line and the grounding line. The same figure shows the conductor Sx terminal being extended to the position of the grounding contact 3x without drilling one of the through holes of an arbitrary signal conductor terminal, for example, one of the through holes 5x indicated by the dotted line in the figure. By making a capture connection with the contact 3x, the same contact 3x and the signal contact 2x are short-circuited, and all the other 3 groups of grounding contacts that are in a conductive state by the common grounding motherboard 3A and connected thereto. Connect all the grounding conductors G to the conductor Sx (common ground bus) which should originally be used for signals through the grounding contact 3x selected above, and
A case is shown in which collective grounding is performed via contact 2x (common ground contact) connected to Sx, which should originally be used for signals.

The grounding contacts 3 in one row arranged at the position where the free conducting wire portion 4f is to be formed are effective in the case of collectively grounding as described above.

Furthermore, the embodiment shown in FIG. 6C is provided with a preliminary grounding contact 3y that is not connected to any conducting wire at the end of the common grounding motherboard 3A, and another conducting wire Gz is connected to the preliminary grounding contact 3y. , shows a configuration in which this is used as a common ground bus bar and is collectively grounded to a printed circuit board, etc.

The common ground bus Gz is led out of the connector through a passage 1j formed on the inner surface of the cover 1b.

In addition, in FIG. 6D, the punching holes 5 are arranged at different positions on each conductor so that they are not adjacent to each other, and the punching holes 5 of one of the adjacent conductors are separated by the punching hole 5 in the left direction in the figure. The single-lead conductor is captured and connected to the first signal contact 2 and the right-hand single-lead conductor is caught and connected to the contact 3 forming the ground line, and the left-hand single-lead conductor is separated by the punch hole 5 of the next adjacent conductor. Contrary to the above, the same right-handed single-lead conductor is captured and connected by the second signal contact 2 which forms the second signal line, and the same is done in the same manner. A case is shown in which signal contacts and ground contacts are alternately connected to each single-lead conductor wire separated by a punch hole.

The connector according to the present invention is installed midway along the length of a single flat cable to form different signal lines at one end and the other end of the same cable, and also forms a ground line adjacent to each signal line. This is preferably carried out when

That is, a bidirectional signal line can be formed with a single connector.

The connector according to the present invention is effective when a signal conducting wire and a grounding conducting wire are alternately formed in a flat cable. When signal conductors and ground conductors are arranged alternately in a conventional flat cable, the number of signal conductors is reduced to one-half of the total conductors.

The connector according to the present invention can alternately form the first and second signal line groups and the ground line group on one end side and the other end side with one connector, and by implementing this, it is possible to form substantially one line. Similar results can be obtained when all conductors of the flat cable are used as signal lines. In other words, the work of preparing multiple connectors to secure the required number of signal lines and connecting them individually is improved, and the resulting increase in costs can be avoided, and the commercial and industrial benefits are extremely large. There is something.

Further, the present invention can form an adjacent pattern of signal lines and ground lines while securing the required number of signal lines in a small space without increasing the mounting space of the connector or complicating the connection mechanism. When completing a large number of signal lines using a multi-core flat cable, it can be carried out very suitably, especially when forming a circuit that prevents crosstalk and noise between each signal line.

[Brief explanation of drawings]

1 to 5 show the detailed mechanism of the connector according to the third embodiment of the present invention, which is schematically shown in FIG. 6C,
Figure 1 is an exploded perspective view of the connector base, Figure 2 is an assembled perspective view of the connector base, Figure 3 is an exploded perspective view of the connector base and connector cover showing the state of connection with the flat cable, and Figure 4 is a perspective view of the connector base and connector cover. FIG. 3 is an assembled perspective view, FIG. 5 is an enlarged perspective view showing the connected state of contacts and cables, and FIG. 6A is a flat cable and a basic embodiment of the connector according to the present invention. FIG. 6B is a plan view schematically explaining the relationship with the contacts, FIG. 6B is a plan view schematically explaining the second embodiment, and FIG. 6C is a plan view schematically explaining the third embodiment. Plan view, Fig. 6D is the same No. 4
FIG. 2 is a plan view schematically illustrating the embodiment. 1... Connector, 1a... Connector base,
1b...Same cover, 2...Signal contact, 3
...Grounding contact, 3A...Common grounding motherboard, 4...Multicore flat cable, 4a...One end of the same cable, 4b...Other end of the same cable, 4c...
Same insulation coating, 4d... Connector mounting area, 4e
... Core wire, 1g ... Recess for fitting ground mother plate, 1i
...Rack-shaped protrusion, Sa...Signal conductor on one end of the cable, Sb...Signal conductor on the other end of the cable, G
...Common grounding conductor, Ga...Grounding conductor at one end of the cable, Gb...Grounding conductor at the other end of the cable,
5...Extraction hole.

Claims (1)

[Scope of Claims] 1. A flat cable in which a group of contacts is made to penetrate through an insulating coating of a flat cable, and a group of conducting wires within the insulating coating are captured by the group of contacts as a result of the penetration, thereby obtaining an electrical connection. The connector is a connection connector, and includes a first signal contact group and a second signal contact group arranged side by side in the width direction of the flat cable, and a common ground ground terminal also arranged in the width direction of the flat cable. Three groups of grounding contacts are installed on the connector base, and the first signal contact group is on the left side of the connector base, and the second signal contact group is on the left side of the connector base. The grounding contacts are arranged parallel to each other on the right side area, and the grounding contacts are arranged between the first signal contact group array and the second signal contact group array with their common grounding base plate, and The ground contact group and the second signal contact group are arranged to capture each conductor group of the flat cable electrically isolated from each other to form a first signal line group and a second signal line group. A connector for connecting a flat cable, characterized in that the row group is arranged to capture conductive wires adjacent to the conductive wires forming the first signal line group and the second signal line group to form a ground line group. 2 The grounding contact group has its grounding mother plate fitted into a recess extending in the width direction of the flat cable formed between the rows of the first signal contact group and the second signal contact group of the connector base. 2. The flat cable connector according to claim 1, wherein a rack-like protrusion formed on the inner wall of the recess is inserted between the grounding contacts.