JPH0212388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible multicore flat cable connector comprising a large number of parallel conducting wires covered with a band-shaped insulating coating.

Multi-conductor flat cables include flat ribbon cables in which each conductor is arranged in parallel, and a flat ribbon cable in which each conductor wire is arranged in parallel.It is also made up of many pairs of conductors in parallel, and each pair of conductors is untwisted at the connector mounting part and rearranged into parallel conductors. There are twist flat cables that can be used for connection.

As a connection means for the above-mentioned multi-core flat cable, a press-contact connector is generally used. As shown in Fig. 1, this pressure welding connector allows a contact 1 to penetrate the insulation sheath of a multicore flat cable 2, and as it penetrates, the conductor 3 inside the insulation sheath is captured, thereby creating an electrical connection (pressure welding). connection). Such a pressure welding connector includes a connector base 4 on which the contacts 1 are planted, and a cover 5 that presses the multicore flat cable 2 onto the connector base 4 to allow the contacts 1 to pass through and create a pressure weld connection. becomes essential. In the above pressure welding, the multicore flat cable 2 is held by the connector cover 5 and positioned, and then the above pressure welding is performed. Alternatively, a positioning means is added, such as by providing wave-shaped grooves in parallel on the holding surface of the multicore flat cable 2 and aligning the insulating coating portions of the conductive wires 3 with each groove. However, the above-mentioned positioning means is mainly aimed at preventing displacement of the multicore flat cable 2 in the short width direction, and cannot effectively deal with displacement of the multicore flat cable 2 in the longitudinal direction. First, it is not possible to solve problems such as the bending of the intermediate portion, which is a characteristic of multi-core flat cables, and the problems caused by this, such as press-connection errors.

The present invention makes it more effective to prevent displacement in the short width direction of the cable, and also effectively prevents displacement in the longitudinal direction of the cable and bending of the cable, thereby making it possible to perform accurate pressure welding connections. This makes it possible to accurately maintain a press-connected state against external forces such as tension applied to the multi-core flat cable 2 after press-connecting.

In particular, the present invention is characterized in that a multi-core flat cable is provided with a hole for cutting the conductor, and a split conductor extending toward one end of the cable and a split conductor extending toward the other end of the cable are separated from each other using the conductor cutting hole as a boundary. To provide a connector that is effective when implemented in a connection mechanism adapted for pressure-welding connection by the connector.

Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

10 is the multicore flat cable described above.
The cable 10 is provided with a plurality of holes 11 for dividing the conducting wires 12 in a perforation pattern to be described later. By dividing the conductor by the conductor dividing hole 11, a divided conductor 12a extending toward one end of the multicore flat cable 10 and a divided conductor 12b extending toward the other end are formed.

The two divided conductive wires 12a and 12b are captured by separate contacts and used for press-connection. Therefore, the conducting wire dividing hole 11 is bored in the middle of a multicore flat cable having a required length, for example, in the middle part. The drawing shows both ends of the cable cut out and the conductor dividing hole 11
The middle part of the cable with the hole drilled is shown.

An insulation displacement connector 13 is provided for the insulation displacement connection of the perforated multicore flat cable 10. The insulation displacement connector 13 has a connector base 16 on which insulation displacement contacts 14 and 15 are installed as described above.
and a connector cover 17 which is stacked on the connector base 16 and into which the multi-core flat cable 10 is pushed in to achieve penetration and pressure connection of the pressure contacts 14 and 15.

Similarly to the above, the connector cover 17 has cable width regulating walls 17a along both ears of the multi-core flat cable 10, and a corrugated shape is formed on the inner wall surface (cable attachment surface) of the connector cover between the cable width regulating walls 17a. The conducting wire alignment grooves 17b are formed in parallel with the conducting wire pitches at the same pitch.

Furthermore, while implementing the cable positioning means, a key 1 is placed on the cable intervening surface of the connector cover 17, that is, on the inner surface of the cover where the conductor alignment groove 17b is formed.
8 is installed protrudingly. A plurality of keys 18 are protruded to correspond to any one, preferably a plurality of, of the conductor dividing holes 11 of the multi-core flat cable 10, and are inserted into the conductor dividing holes 11 for pressure welding connection. The inserted state of both 11 and 18 is maintained even after the pressure welding connection.

As shown in the figure, the conductor cutting hole 11 for cutting the conductor 12 is rectangular, and a key 18 is inserted into it.
It is also preferable to use a rectangular key that fits this.

That is, as shown in FIG. 4A, the key 18 has a pair of side surfaces 18a that abut against the end surfaces of the conductor exposed by the conductor dividing hole 11, and another pair of side surfaces 18a that face insulating surfaces parallel to the adjacent conductors. It has a side surface 18b.

As described above, each side surface of the key 18 and each inner surface of the conductor dividing hole 11 are placed in a fitted state with almost no play, and the multi-core flat cable 10 is fitted in the short width direction or longitudinal direction (conductor axial direction).

Alternatively, as shown in FIG. 4B, the prevention of movement in the short width direction is left to other positioning means, and the conductor end surfaces of the conductor dividing hole 11 are butted only at the pair of side surfaces 18a to prevent movement in the long width direction. In some cases, it may be regulated.

The key 18 has side surfaces 18a and 18b as described above.
As a means to ensure this, one conductor dividing hole 11 is divided into a plurality of key pieces 18' along the inner surface of the conductor dividing hole 11, as shown in FIG.
It is also possible to form an insulating gap between 8'.
Further, the key 18 has a height that at least penetrates the conductor dividing hole 11. As a preferred example, the key 18 is inserted into the conductor dividing hole 11 as described above, passing the multicore flat cable 10 through it, and then inserting the tip of the key into the hole 19 drilled in the compression contact planting surface of the connector base 16. insert.

That is, the hole 19 is bored so as to be paired with the key 18, and placed in communication with the conductor dividing hole 11. The key 18 is inserted into the conductor dividing hole 11 and the closing hole 19 to determine the relative position of the multicore flat cable 10, connector base 16, and connector cover 17.

As mentioned above, the multicore flat cable 10
The hole 11 for cutting off the conductor 12 can be used to use one conductor as two conductors in one cable to form separate signal lines at one end and the other end of one multicore flat cable 10, or This is intended to prevent crosstalk by forming separate signal lines and forming a ground line adjacent to each signal line. The Examples illustrate the latter.

In order to achieve the above object, the perforation pattern of the conductor dividing holes 11 in the multi-core flat cable 10 is exemplified as shown in FIGS. 6A to 6D. Correspondingly, the pressure contact 1 of the connector base 16
4.15 planting patterns are determined. In the connector board 16, the contacts 14 are pressure contacts for signals, and the contacts 15 are pressure contacts for grounding, and a row of grounding contact groups is arranged between rows of signal contact groups, and for example, the conductor is separated at the left signal contact 14 group. The split conductor 12a extending toward one end of the cable separated by the hole 11 is captured, and the split conductor 12 extends toward the other end of the cable.
b is captured by the group of 14 signal contacts on the right side, and different signal lines are formed at one end and the other end of the cable, and the divided conductor or undivided conductor (non-perforated conductor) adjacent to the divided conductor of each signal line is A grounding line is formed by capturing the grounding contacts 15 arranged in the middle.

In this embodiment, the conductor dividing hole 11 is used for the above purpose, and at the same time is used as a positioning means for a multi-core flat cable or a connector element to provide tensile strength against tensile force in the cable axis direction (longitudinal direction) and maintain pressure contact. do.

In FIG. 6A, conductor dividing holes 11 are alternately bored in the conductor wires 12 arranged in parallel, and at both ends of the conductor dividing holes 11, signal pressure contacts 14 (indicated by white circles in the figure) capture each divided conductor wire 12a, 12b and signal. A ground line (conductor wire shown in white in the figure) and a non-perforated conductor adjacent to each perforated conductor are captured by the grounding pressure contact 15 (indicated by a black circle in the figure) to form a ground line (conductor wire shown in a matte pattern in the figure). , a key 18 protruding from the connector cover 17 is inserted into any or all of the conductor dividing holes 11 to function as means for preventing movement of the cable relative to the connector 13;
Alternatively, it is provided with a function of indicating the pressure contact position with respect to the cable 10, that is, the attachment position of the connector 13 with respect to the cable 10, and causing the pressure contact to be performed at the correct position of the cable.

In Fig. 6B, the conductor dividing holes 11 in Fig. 6A are drilled for each conductor, whereas the conductor dividing holes 11 are drilled for each conductor in two adjacent conductors. Left and right divided conductor wires 12a, 12 with conductor dividing holes 11 bored so that the non-perforated conductors are adjacent to each other.
b is a signal conductor, a non-perforated conductor is a ground conductor, and pressure contacts 14 and 15 for signal and ground are arranged in a pattern corresponding to the conductor, and the conductor 12 is straddled over the plurality of conductors 12. This figure shows a case where a key 18 of the same size is inserted into a wide conducting wire dividing hole 11.

In addition, in Figure 6 C, the conductor 12 is the same as in Figures A and B.
In contrast to the case in which one conductor dividing hole 11 is drilled for one conductor, a plurality of conductor dividing holes 11 are bored in parallel for one conductor. Pressure contact for other signals 1
4 and the grounding contact 15 are the same as in the case of Fig. A, except that keys 18 are inserted into the two conductor dividing holes 11 in each line, and the connector is attached to the multicore flat cable 10. This is an example of strengthening the same effect by securing the position or imparting tensile strength against pulling in the direction in which the conductor extends.

Furthermore, in FIG. 6D, the conductor dividing holes 11 are arranged in a staggered manner.
It is possible to form the signal line and the ground line by drilling holes in adjacent conductive wires, and it is also possible to distribute the keys 18 over a wide range, substantially the same as in FIG. 6C.

Also, in the case of FIGS. 6A to 6C, the one end side divided conductor and the other end side divided conductor of the same conductor dividing hole 11 are used as signal conductors, whereas in the case of FIG. 6D, the signal conductor and the ground conductor are used as signal conductors. A case is shown in which divided conductive wires on one end side and divided conductive wires on the other end side of different conductor dividing holes 11 are alternately formed, and signal lines and ground lines are respectively formed in a staggered manner.

In addition to rectangular, the conductor cutting hole 11 for cutting the conductor may be made circular, and a cylindrical post raised from the cover may be inserted into the hole.

The number of cores in the multi-core flat cable 10 has been increasing in recent years, and the cables have accordingly tended to become wider. It is difficult to correct the bending behavior of the cable by restricting both ears of the flat cable 10 or simply aligning the outer sheath of the cable conductor with a shallow corrugated groove as in the past. It can be said that it has almost no tensile effect, and even more so, it has almost no tensile effect. When the cable bends, which is the most noticeable phenomenon, it inevitably causes a slight deviation in the one-to-one correspondence between the insulation displacement contact and the conductor, causing the conductor to penetrate into a different outer sheath, or being pressed in an abnormal posture. Misconnections, poor connections, etc. may occur, and highly reliable pressure welding connections cannot be expected.

In the present invention, conductor alignment grooves are formed in parallel on the cable attachment surface of the connector cover of the connector 13 to the conductor dividing hole 11 drilled in the middle part of the cable, which tends to bend even with a wider multicore flat cable. By putting the key 18 protruding from the key 18 into the inserted state, the bending can be canceled and a flat state can be created, which can be used for pressure welding. Therefore, it is possible to effectively cope with the increase in the number of cores and width of flat cables.
Ensures highly reliable pressure welding.

As mentioned above, it also has the function of indicating the pressure welding position for the flat cable, allowing the connector to be installed and connected in the proper position.In addition, even after pressure welding, the key 18 and the conductor separation hole 11 are maintained in engagement, and the conductor A good tensile strength against the tensile force in the axial direction can be obtained, and the pressed state can be maintained appropriately.

In particular, in the present invention, the conductor dividing hole 11 is made to function as an insulating hole for the divided conductor, and a key is inserted into the conductor dividing hole 11 to determine the position. Penetrated key 1
The end face of the split conductor wire, which is highly rigid in the compression direction, is abutted against the side surface of the cable 8, exerting a large counterforce against the tension applied to the flat cable, and ensuring a good pressure-welding state. That is, by inserting and positioning the key 18 into the conductor dividing hole 11, the divided conductor can be effectively utilized as a tensile strength member against external forces.

Furthermore, by passing the key 18 protruding from the connector cover side through the conductor dividing hole 11 and inserting the tip of the key into the hole drilled in the pressure contact planting surface of the connector base 16, the multicore flat cable 10 and the connector are connected. By effectively positioning the base 16 and the connector cover 17 relative to each other, the pressure welding can be properly performed.

[Brief explanation of drawings]

Fig. 1 is an enlarged sectional view showing the state of pressure welding of a multi-core flat cable by a pressure welding connector, Fig. 2 is a perspective view of the connector before pressure welding of a multi-core flat cable showing an embodiment of the present invention, and Fig. 3 is the same pressure welding state. FIG. 4A is a perspective view showing the rear connector with a part cut away, and FIG. Embodiment 2, and Figure C shows Embodiment 3. Each figure shows the key in cross section, and Figure 5 shows the state of insertion of the key and the conductor dividing hole with the cover, the key, and the multi-core flap. Figures 6A to 6D, which are vertical cross-sectional views of the flat cable and the connector base, respectively show the perforation patterns of the multicore flat cable, and the pressure-welding connection state and key insertion state according to each perforation pattern. FIG. 10... Multicore flat cable, 11... Conductor dividing hole, 12... Conductor, 12a, 12b... Division conducting wire, 13... Pressure contact connector, 14... Pressure contact for signal, 15... Grounding Pressure contact, 16... Connector base, 17... Connector cover, 18... Key, 19... Hole.

Claims (1)

[Claims] 1. A multi-core flat cable is interposed between the connector base and the connector cover, the conductors of the multi-core flat cable are positioned by the conductor alignment grooves arranged in parallel on the inner surface of the connector cover, and the insulation displacement contacts planted on the connector base are connected. In a multi-core flat cable connector that penetrates the conductor sheath of the multi-core flat cable and makes pressure contact with the conductor, a hole is made in the multi-core flat cable to separate the conductor, and a hole is made in the multi-core flat cable to separate the conductor, and a hole is formed in the multi-core flat cable to separate the conductor from the conductor alignment groove of the connector cover. A key is provided protrudingly, the key is inserted into the conductor dividing hole, the tip of the key is inserted into the hole formed in the press contact planting surface of the connector base, and the divided conductor is inserted into the opposite side of the key. A multi-core flat cable connector characterized by abutted end faces.