JPH0126052Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal attachment device for coaxial cables, shielded wires, etc., and particularly to a device for effectively connecting coaxial cables, etc. to a printed circuit board.

A shielded wire or a coaxial cable includes a core wire and a ground wire portion disposed coaxially surrounding the insulating coating of the core wire.

When attaching and tangentially connecting this shielded wire to a printed circuit board, a predetermined length of the outer sheath from the end of the shielded wire is usually removed to expose the grounding wire, and the exposed grounding wire forms a grounding lead. Then, a part of the core wire insulation coating exposed during the earth lead formation process is removed to form a core wire lead,
Solder the ground lead and core wire lead to predetermined parts of the printed circuit board. In this case, due to the flexibility of the ground lead formed by multiple wires in the ground wire section, it is impossible to attach the shield wire to the board at the same time as other circuit elements, resistors, capacitors, etc. in one step. . Therefore, the attachment of the shield wire to the board often constitutes a process in itself, posing a major obstacle to automation and labor saving.
Furthermore, the contact of the ground lead with other circuit elements and the contact of the ground lead with the core wire become major problems, and it is clear that the work is more careful and tedious when it comes to connecting coaxial cables etc. to the board. be.

Therefore, the purpose of the present invention is to provide a method for attaching shielded wires, coaxial cables, etc. to printed circuit boards.
The object of the present invention is to provide a connection means that allows the connection process to be easily performed simultaneously with circuit elements such as resistors and capacitors.

Another object of the present invention is to provide such a connection means which prevents the possibility of the ground lead coming into contact with the core or hot side.

Still another object of the present invention is to provide the above-mentioned connecting means that prevents shielded wires from easily coming off during the process in an automatic soldering bath when soldering shielded wires and other circuit elements to a circuit board.

Yet another object of the present invention is to prevent thermal damage to the hot lead sheathing caused by soldering the ground lead to the connection.

Another purpose of the present invention is to prevent interference with other circuits on the board due to signal leakage at the connection point of the coaxial cable on the board when transmitting high frequency signals using coaxial cables, etc. The purpose of this invention is to provide a terminal connection device for coaxial cables, etc.

The figure shows a connecting device 10 according to an embodiment of the present invention. As shown in FIG. 1, a connecting device 10 is attached in advance to the terminal of a coaxial cable, shielded wire, etc. 12. The cable 12 includes a jacket 14, a ground wire portion 16,
It consists of a core wire 18 and an insulating coating 20 between the ground wire portion 16 and the core wire 18. The ground wire portion 16 is the core wire 1
It is formed as a coaxial layer consisting of a number of wires wrapped around 8. Of course, two or more core wires 1
The present invention can be applied even to a multi-shielded wire provided with 8.

As is clear from FIGS. 1 and 2, the connection device 10 includes a cable connection ring 22 and a board connection foot 2.
4, which is fabricated from a single sheet of copper or brass. The ring portion 22 mates with the coaxial ground wire portion 16 and is secured both electrically and mechanically by crimping means 26. Typically, the two legs 24 exhibit a resiliency that allows them to move relative to the annulus, and this resiliency can be used to insert them into corresponding holes 30 in the base plate 28 of FIG. Each leg 24 has a dogleg-shaped bend 32, which serves to prevent it from coming off the substrate 28. Therefore, the cable can be simultaneously soldered to the board 28 together with other circuit elements, and "falling out" is prevented at this time.

The connecting device 10 is attached to the cable 12 in advance in a separate process, and then the core wire 18 is inserted into the hole 3 of the board 28.
4, the foot part 24 is inserted into the hole 30 and soldered from the back side of the board, for example, in an automatic soldering bath. Later, the protruding portions of the legs 24 and the core wire leads 18 are cut out together with those of other circuit elements, for example with an automatic cutter.

Furthermore, in particular according to the invention, the ring part 22 of the connecting device 10 has a plurality of legs 23, which partially surround the core wire 18, so that, in particular, the cable 12 can be connected to the circuit on the substrate 28. When transmitting high-frequency signals to other circuits, it prevents the signal from leaking to other circuits, does not require special consideration as in the past, and can be advantageously achieved in conjunction with the various purposes mentioned above. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the cable connecting device of the present invention in relation to cables to be connected;
The figure shows a state in which a cable equipped with the connecting device of the present invention is connected to a printed circuit board. 10... Connection device, 12... Cable, 14...
...Outer cover, 16...Ground wire section.

Claims (1)

[Scope of utility model registration request] An annular portion that is electrically and mechanically connected to a coaxial ground wire such as a coaxial cable or shielded wire, and a plurality of legs extending approximately axially from the annular portion and having bent portions are formed into a single conductive plate. The annular portion extends downward from the end of the coaxial ground wire portion, and partially surrounds the core wire of the coaxial cable when connecting the core wire to a printed circuit board, etc. A terminal connection device for a coaxial cable, etc., characterized by comprising a hem portion having the following structure.