JPS5885214A - multicore cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for connecting core wires to contacts on the connector side by quickly press-welding the core wires to the contacts on the connector side, even when the number of core wires is less than the number of contacts on the connector side. This relates to core cables.

When connecting a multicore cable to a connector, various connection methods have been used in the past, such as wrapping and connecting individual insulating coating materials to the connector side contacts, soldering, t-bonding, or crimp connections. However, as the insulated core wires become thinner and the number of them increases, the actual situation is that it is becoming difficult to connect by such a connection method. As the number of thin wires increases, the connection work becomes more complicated, and the connection position can be easily determined. Therefore, in recent years, there has been a demand for a connection method using bulk pressure welding with excellent work efficiency, and this is actually becoming mainstream, and it can be said that flat cables exactly meet that demand. However, it is difficult to apply this connection method to a multicore cable with a round outer jacket. Normally, the core wires exposed to the outside at the ends of multicore cables are left in a free state.
If you want to perform a batch pressure welding connection, you must align the core wire sides with the connector side contacts) before making the batch pressure welding connection, which makes the alignment work complicated and takes a lot of time. It is.

Further, even if the core wires exposed to the outside are fused in a flat shape in advance, it may not be possible to make a pressure-welded connection all at once, depending on the case. If the number of contacts on the connector side matches that of the core wire, and the core wire is fused and formed in a flat shape, alignment can be completed by simply aligning both ends.
This is because alignment is generally not easy when connecting so-called tooth extraction. Note that the connection here refers to a connection state in which the number of core wires is smaller than the number of connector-side contacts, and therefore there are connector-side contacts to which core wires are not connected. Whether positioning is relatively easy or not depends on the manner of the missing teeth, but in general, the more complex the manner of the missing teeth, the more difficult it is to perform a one-shot pressure weld connection.

Therefore, it is an object of the present invention to provide a multi-core cable that allows the core wires to be quickly press-connected to the contacts on the connector side in a good alignment state when the tooth extraction is performed.

For this purpose, in the present invention, the core wires exposed to the outside from the cable ends are fused and formed into a flat shape. It was designed to be mixed. Since the number of core wires including dummy wires matches the number of contacts on the connector side, alignment of the core wires to the contacts on the connector side can be performed extremely easily and quickly.

Hereinafter, before explaining the present invention with reference to FIGS. 3 to 5, the principle of pressure welding connection will be explained with reference to FIGS. 1 and 2.

FIGS. 1(a) and 1(b) show the front and side views of a contact mounting member that constitutes a part of the connector.

As shown in the figure, U-shaped contacts 2 are installed in a row at a predetermined pitch on a contact mounting member 1, and a core wire is press-connected to each of the contacts 2.

FIG. 2 shows the principle of the pressure welding connection, and the pressure welding connection is performed by pushing the core wire into the contact 2. That is, the core wire, in which the electric wire 1i13 is insulated by the insulation coating 4, is located at the middle upper part of the elastic clamping pieces 2m and 2b before pressure welding, and when the core wire is pushed in from above, the core wire is subjected to the force from the elastic clamping pieces 2a and Qb. While gradually descending while resisting 1
The elastic clamps 2a and 2b gradually bite into the insulation coating 4 as the core wire descends. When lowering the core wire appropriately, use the wire 3 and elastic clamping pieces 2m and 2b.
are pressed against each other, thereby establishing an electrical connection between the stain line 3 and the contact 2. In addition, it costs $3 and 2 elastic clamping pieces.

Thereafter, the core is pressed down from above by another member in order to maintain the press-contact state with 2b.

Now, the present invention will be explained with reference to FIGS. 3 to 5.

FIGS. 3(a) and 3(b) show the structure of an example of a multicore cable according to the present invention and its cross section taken along line AA'. As shown in the figure, the core wires 6 exposed to the outside from the ends of the multicore cable 5 are fused into a flat shape over the length with their tips aligned, and the fused portion is further fused. A predetermined number of dummy wires 7 are also added by fusion bonding. Core II6 of dummy wire 7
The fusion position and the number of fused wires depend on the type of tooth extraction, but in any case, the number of core wires 6 including the dummy wires 7 must match the number of contacts on the connector side. Dummy wire 7F! , whose diameter must match that of the core wire 6, but an electric wire is not necessarily required at its center. This is because the purpose can be sufficiently achieved by constructing the insulation coating 4 from the same or similar material.

However, in general, the dummy wire 7 is the same as the core wire 6, that is, it is easily obtained by cutting a part of the core wire 6.

By the way, it is easy to fuse and form the core wire 6 and the dummy wire 7 into a flat shape by high frequency dielectric heating.

As shown in FIG. 4, for example, dielectric heating is performed with the core wire 6 and the dummy wire 7 placed on the lower electrode B. If a high frequency voltage of, for example, 40 MHS is applied to the upper electrode 9 and the lower electrode 8 by the high frequency power source 10 while the insulation coating bare surface is in contact with the adjacent core @ 6 or die wire 7, the insulation coating will be removed by the high frequency electric field. The core wire 6 and the dummy wire 7 are heated, and thereby the core wire 6 and the dummy wire 7 are fused together into a flat shape.

Finally, another example of the multicore cable according to the present invention will be explained with reference to FIG. In this example, the tooth extraction has a connection part of 4.
This is the case when the two liquids are present in the same place, and no matter how complicated the form, both liquids can easily be used to obtain a nine-core cable. The multicore cable thus obtained can be handled in the same way as a cable in which the number of contacts on the connector side matches that of the core wires.

Both liquids are aligned as if there were no connection, and therefore the pressure welding connection can be easily and quickly performed at once. It goes without saying that both ends of the cable may be fused into a flat shape as in the present invention. Furthermore, the present invention is also applicable to flat cables.

As explained above, the present invention mixes a predetermined number of dummy wires with a plurality of core wires exposed to the outside from the end of the cable, and arranges these core wires and dummy wires in a flat shape according to the shape of the teeth, and also in one piece. It is designed to be fused to. Therefore, in the case of the present invention, since both liquids can be connected in a good position, the core wire can be easily and quickly pressure-welded to the connector-side contact all at once. is obtained.

[Brief explanation of the drawing]

Figure 1 (b) shows the front and side views of the contact mounting member that constitutes a part of the connector, Figure 2 is a diagram for explaining the principle of pressure welding connection between the core wire and the contact, 3(a) and 3(b) are diagrams showing the configuration of an example of the multicore cable according to the present invention and its cross section along line A-A';
The figure is a diagram for explaining a flat-shaped fusion method for core wires and dummy wires, and FIG. 5 is a diagram showing the structure of another example of the multicore cable according to the present invention. 5... Multicore cable, 6... Core wire, 7... Dummy wire. Agent Patent Attorney Masami Akimoto Single Figure Figure 7 Figure 3

Claims (1)

[Claims] 1. A predetermined number of dummy wires having the same diameter as the skeleton core wire and at least similar insulation covering material are intermixed with a plurality of core wires exposed to the outside from the end of the cable, # A multi-core cable characterized by a structure in which a wire rod and the above-mentioned core wire are integrally fused in a flat shape over a length that is parallel to each other.