JPS5847837B2 - Pressure bonding method between discrete wire and connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved pressure bonding method for connecting individual discrete wires to multi-connectors.

So-called multi-connectors are widely used for complex wiring processing of various electronic devices.

In this case, in order to connect wires to a large number of wire connection terminals of a connector, instead of soldering each one individually, it is also widely used to make the tips of the connection terminals into a fork shape and press-fit the connection wires between them. has been done.

At this time, the pronged end of the terminal breaks a part of the wire coating and bites into the side of the wire core, so that it is firmly held not only electrically but also mechanically.

In this method, by using a so-called flat cable in which a large number of core wires are arranged in parallel in an orderly manner and coated with insulation in the form of a strip, the connection process can be performed accurately and firmly using relatively simple tools.

This is because, of course, the core wire pitch (the spacing between core wires) of the flat cable is likely to change during the connection process, and a multi-connector with connection terminals arranged at a pitch equal to the pitch is used. be.

However, since this convenient flat cable has many core wires arranged in parallel in an orderly manner, the electrostatic and electromagnetic coupling between the core wires is lower than when using discrete wires. There is a disadvantage that there are relatively many cables, and if the connecting wire is relatively long or the circuit to be connected is a high frequency circuit, it is necessary to use a discrete wire instead of a flat cable.

In this case, the individual wires must be arranged in accordance with the pitch between the connecting terminals of the connector, cut, and then pressed together with the connector.

Fig. 1 shows this process in the order of steps with schematic side views, showing the left and right 2 comb-like grooves 1, 1' formed at the same pitch as the connection pitch of the connectors to be connected to the top surface.
First, a tool consisting of a board 6 that holds the wire mounting plates 2, 3, the receiving blade 4, and the connector cover 5 in the correct position is attached.
As shown in FIG. Press down to cut the wire 7 as shown in Figure 1, and then pull it up and move one wire mounting plate 3 to the right while holding the wire 7, as shown in Figure 1 C, to accurately cut the wire. cover 5
After aligning the connector 10 with the side of the wire 7, place the connector 10 in the correct position on top using a suitable guide, push down the pressure contact plate 9 again, and break the coating of the wire 7 and connect the connection terminal 11. It bites into the sidewall of the wire to complete the electrical and mechanical bonding process.

At this time, the wire mounting plate 3 is moved to the right as shown in FIG.
This is because at least the width of the cutting edge 8 is formed at a position away from the edge of the cover 5 due to the relationship.

Once the wires 7, which were arranged at regular pitches in the comb-like grooves 1 and 1' on the wire mounting tables 2 and 3, are cut, their free ends 7' are no longer arranged at regular pitches. Therefore, it is extremely difficult to match the free ends 7' of the cut wires to the pitch of the lower connecting terminals 11 of the connector 10 to be placed on top of the connector 10 and to be pressure-welded, and it takes a considerable amount of man-hours. Become.

The object of the present invention is to provide a new press-fitting method which obviates this drawback, and this object is achieved by utilizing the edge of the connector cover as a receiving edge for the cutting edge.

The edges of the cover 5, which are molded with a resin mold, have sharp edges even if they are not shaped with special care. Since the diameter is less than 1 millimeter, it can fully serve as a receiving blade for the cutting blade for cutting.

Furthermore, the present invention has the advantage that cutting the wire and press-fitting the connector can be completed in one step.

FIG. 2 shows a pressure bonding process according to the present invention with a schematic side view, similar to FIG. Wire mounting plates 2, 3 with 1, 1' are integrally formed.

First, as shown in FIG. 2A, the cover 5 is placed in the housing groove of the board 6.
Next, the wire 7 is placed between the comb-teeth grooves 1 and 1', and the connector 10 is placed on top of it in its proper position.
The pressure contact plate 9 with the cutting blade 8 on the side is pushed down, and as shown in the opening of the same figure, the connection terminal 11 of the connector 10 penetrates into the surface coating of the wire 7, and as the pressure contact plate 9 is pushed down, the cutting blade 11 serves as a receiving blade for the edge 12 of the cover 5 to cut the wire 7 exactly at the same position as the edge, and the connecting terminal 11 also bites into the core side wall of the wire 7 to prevent electrical and mechanical damage. firmly fixed.

After that, all you have to do is push up the pressure contact plate 9 and take out the connected connector.

FIG. 3 shows a perspective view of a tool advantageously used in the pressure welding method according to the invention, partially in section for ease of understanding.

A board block 22 has a housing groove 20 for the connector cover in the center and comb-like grooves 21, 21' on the upper surface along the housing groove, and springs 23.
24 is fixed, and a suppression plate 28 having a cutting blade 27 fixed to its side surface is removably attached to this guide shaft.

Guide blocks 29 and 30 are fixed on the substrate 22 by screws 31 and 31' across the comb-shaped groove 21', depending on the length of the connectors to be pressure-connected.

Since the length of the connector is already determined depending on the type, it is sufficient to provide several female threaded holes 32, 32' on the board 22.

The pressure welding process of the present invention shown in FIG. 2 will be explained below using this tool.

First, remove the pressing plate 28 and remove the guide block 29.30.
The connectors and covers are fixed on the board 22 at intervals of

Next, a cover (5 in FIG. 2) is placed between the blocks 29, 30 and in the housing groove 20, and a predetermined number of wires (7 in FIG. 2) are placed on top of the cover in the comb-shaped grooves 21, 21'. Line them up and put them in the closet.
Next, place the connector (10 in FIG. 2) on top of it, using the guide blocks 29 and 30 as guides at both front and rear ends, and the side walls of the housing groove 20 as guides, and then attach the suppressing plate 28. When pressed from above by a suppressor, the cutting blade 27
At the same time, the side edges of the cover placed in the housing groove 20 serve as receiving blades to cut the wires 7 (openings in Figure 2) that are arranged in parallel at the bottom of the connector. The terminal (11 in FIG. 2) and wire clamp complete the electrical and mechanical connection.

At this time, since the upper surfaces of the guide blocks 29 and 30 are made lower than the upper surfaces of the connectors to be pressed, the connectors that have been press-connected can be easily taken out by removing the suppressing plate 28.

[Brief Description of the Drawings] Fig. 1 shows a conventional connector pressure welding process, Fig. 2 shows a process according to the present invention, and Fig. 3 shows a schematic side view of the process order. An example of a tool is shown below. In the figure, 2 and 3 are wire mounting plates with comb-like grooves on the top, 4 is a receiving blade, 5 is a connector cover, 6 is a cover mounting plate, 7 is a wire, 8 is a cutting blade, and 9 is a suppression plate. , 10
is a connector, 20 is a cover accommodation groove, 22 is a comb-shaped groove 2
1 and 21', 28 is a pressing plate with a cutting blade 27 on its side, and 29 and 30 are guide blocks.

Claims (1)

[Claims] 1. A discrete wire characterized in that, when the discrete wire is press-connected to the forked terminal of the connector between the connector and the connector cover, a receiving blade for the wire cutting cutting blade is an edge edge of the connector cover. Pressure bonding method between the connector and the connector.