JPS5926543Y2 - antenna connector terminal - Google Patents

Description

[Detailed description of the invention] This invention uses a mixture of a dielectric material and a high-resistance material to create a capacitor for connecting the antenna lead-in coaxial cable of a wireless receiver such as a television receiver and the coaxial cable inside the receiver. and an antenna connection terminal which is equivalent to a resistor and constitutes an electrical voltage protection circuit.

In wireless receivers such as television receivers, a coaxial cable is used as a feeder introduced from an external antenna, and a coaxial cable is used as a feeder between the receiver's antenna terminal and the high frequency input of the device. There are many.

The coaxial cable for the external antenna feeder and the internal coaxial cable to the antenna terminal are connected with a plug, making it easy to remove.

However, conventionally, there has been a connection between an external antenna feeder and an internal feeder for purposes such as transmitting high frequencies such as those used in television, matching the impedance of the feeder inside and outside the receiver, and insulation to prevent damage from abnormal voltages inside and outside the receiver. 1st
The circuit shown in the figure is connected.

As shown in Fig. 1, a high frequency transmission capacitor 4 and a withstand voltage resistor 5 are connected between the shield coating 2 of the external antenna coaxial cable 1 and the shield coating 2' of the internal feeder coaxial cable 3. A capacitor 7 and a resistor 8 are connected between the antenna coaxial cable core wire 6 and the feeder coaxial cable core wire 6' of the coaxial cable, as in the case of the shield coating.

Further, for electrostatic shielding and prevention of danger due to contact, etc., the entire portion of the capacitor and resistor including the terminals of both coaxial cables is covered with a shielding case 9.

When connecting one of both coaxial cables with a plug, connect the antenna coaxial cable 1 to the plug 10 side of the plug as shown in FIG.
It is also practiced to connect to the jack 12 side of the plug of the shield case 11 including the shield case 11.

Generally, in the example of a television receiver, capacitors 4 and 7
The resistor 5.8 has a value of about 100 to 1000 picofarads (pF), and the resistor 5.8 has a value of about 1 to 10 megohms (MΩ).

However, conventional methods require circuit components such as capacitors and resistors, as well as mechanical components such as shield cases, and require man-hours to manage, assemble, and inspect these components, making them expensive and lacking in product reliability. It has some shortcomings.

The present invention eliminates the drawbacks of the conventional method by inserting a dielectric material with high resistance between each layer of several layers of concentric cylindrical metal bodies to form a capacitor and a resistor, and an insulating material between the layers. The present invention relates to an antenna connector terminal which is used as a coaxial cable jack by inserting the same to perform impedance matching of the coaxial cable.

Hereinafter, the present invention will be explained by way of examples with reference to the drawings.

FIG. 3 is a cross-sectional view of an embodiment of the present invention and a diagram showing connection relationships.

In FIG. 3, a metal cylindrical first tube which is slightly tapered toward the inside of the device is attached to the insulating plate 13 for attachment to the device so that it can be easily connected to the shield coating 2' of the feeder coaxial cable 3 inside the device. Fix the electrode 14.

Also, a second electrode 15 is formed concentrically inside the first electrode 14.
is arranged, and a part of the cylinder 17 of the cylindrical second electrode 15 is exposed through the insulator 16 toward the inside of the device, and outside the insulating plate 13 toward the outside of the device.

Between the first electrode 14 and the second electrode 15 is a dielectric material 18 made of a synthetic resin with high insulation and a dielectric constant that is almost the same as that of the insulator of the coaxial cable and carbon mixed therein as a resistor.
or incorporate a ceramic with equal dielectric constant and high resistance.

This dielectric 18 or ceramic is connected to the first electrode 14 and the second electrode.
Electrical capacitance and electrical resistance are formed between the electrode 15 and the electrode 15 .

Here, the first electrode 14 is caulked or soldered with the shield coating 2' of the feeder coaxial cable 3 from inside the device, and the shield coating 2 of the antenna coaxial cable 1 is attached to the cylinder 17 extending outside the second electrode 15. If you connect with something like
A circuit configuration equivalent to the capacitor 4 and high resistor 5 shown in FIG. 1 is formed between the shield coatings 2 and 2' of the coaxial cables 1 and 3.

Further, an insulating plate 19 is provided inside the second electrode 15 toward the outside of the device, and a cylindrical electrode 20 is placed concentrically inside the second electrode 15.
Further, a rod-shaped third electrode 21 extends toward the inside of the device of the cylindrical electrode 20.
are made into one piece, penetrate through the center of the insulation 0116, and protrude toward the inside of the device.

The gap between the second electrode 15 and the cylindrical electrode 20 is filled with an electrical insulator 22 such as polyethylene.

Further, a rod-shaped or tubular fourth electrode 23 is made to penetrate through the center of the insulator 19 and protrude to the outside so as not to touch the cylindrical center of the cylindrical electrode 20.

A dielectric material 1 is provided in the gap between the cylindrical electrode 20 and the fourth electrode 23.
If the same material as 8 is filled or ceramic is inserted, electrical capacitance and high electrical resistance will be formed between the two electrodes.

Therefore, when the core wire 6' of the feeder coaxial cable 3 is connected to the third electrode 21 and the core wire 6 of the antenna coaxial cable 1 is connected to the fourth electrode 23, there is a gap between the core wires of both coaxes as shown in FIG. The circuit configuration is equivalent to that in which the capacitor 7 and the high resistance 8 are connected.

Therefore, by assembling the plug terminal in the configuration shown in FIG.
If the cylinder 17 protruding from the second electrode 15 is connected to the shield coating 2 of the antenna coaxial cable 1, and the fourth electrode 23 is connected to the core wire 6, the circuit configuration is completely equivalent to the conventional circuit configuration. It becomes a terminal.

In addition, the cylinder 17 outside the second electrode 15 and the fourth electrode 23
The terminal plug of the present invention can be connected to the various plugs mentioned above by making the terminal plug of the present invention compatible with various plugs such as the plug of the International Electricity Commission standard or the plug called F plug. Jack can be used.

As described above, according to the present invention, there is no need for electrical parts such as capacitors and resistors, and mechanical parts such as shield cases as in the past, and the capacitance and resistance values can be adjusted to the conventional values by selecting the dielectric material. Not only does it require less man-hours to install parts, it does not cause parts to fall off, move, or come into contact with each other due to vibrations, and it provides a highly reliable connector with good alignment between both coaxial cables.

Furthermore, it is possible to apply a high voltage and to obtain a connection that is safe for the human body.

[Brief explanation of drawings]

Figure 1 is a circuit diagram for connecting a coaxial cable between a conventional antenna and a device feeder, Figure 2 is a perspective view of a conventional antenna connector terminal, and Figure 3 is a structural cross-section of an embodiment of the connector terminal of the present invention. FIG. The symbols used in the drawings indicate the following. 1...Antenna coaxial cable, 2, 2'...
...Shield coating, 3...Feeder coaxial cable, 4,7...Container, 5,8...
...Resistance, 6,6'... Core wire, 9...
・Shield, 10...Plug, 11...
・Shield case, 12...Jack, 13・
...Insulator, 14...First electrode, 15.
...Second electrode, 16...Insulator, 17.
...Cylinder, 18...Dielectric, 19...
... Insulating plate, 20 ... Cylindrical electrode, 21 ...
...Third electrode, 22...Insulator, 23...
...Fourth electrode.

Claims (1)

[Scope of utility model registration request] An antenna terminal in which a parallel circuit consisting of a capacitor and a high resistance is connected between the shield coating and the core wire of the coaxial cable for the antenna and the coaxial cable for the feeder into the equipment, and this part is further shielded. Each cylinder is arranged concentrically in a cylindrical shape, and the ends of each cylinder are electrically insulated by an insulating plate, and a dielectric material having high resistance and the same permittivity as the coaxial cable insulation is filled in between. An electrical insulator is filled between the first electrode on the outside and the second electrode on the inside, and the second electrode.
A cylindrical electrode integrally configured with an electrode, and a rod-shaped fourth electrode placed at the center of the cylindrical part of the cylindrical electrode and filled with a dielectric material having the same performance as the above. The antenna connection is characterized in that the shield coating of the coaxial cable is connected to the first electrode and the second electrode, and the core wire is connected to the third electrode and the fourth electrode. Plug terminal.