JPH0591045U - Wiring device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a wiring device capable of simplifying wiring by using a high-frequency signal transmission line and a commercial-frequency power transmission line together on a common transmission line. The purpose is to do. An impedance matching circuit 11 for matching a high frequency signal with the impedance of a transmission line, and a mixing circuit 12 for mixing the high frequency signal with commercial frequency power from a commercial power source.
And a line filter 13 for suppressing the leakage of the high frequency signal to the commercial power source side, and the mixer 1
Transmission line 2 for transmitting commercial frequency power and high frequency signals from
A separation circuit 31 for separating the high frequency signal transmitted by the transmission line 2 from the commercial frequency power; an impedance matching circuit 32 for matching the high frequency signal separated by the separation circuit 31 with the impedance of the transmission path; And a shunt 3 composed of a line filter 33 that suppresses leakage to the power supply circuit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiring device that solves the congestion of a television, a video device such as a video driven by a commercial frequency power, a power cable and a cord of an information terminal device, an antenna cable, a feeder line, and a signal information line. is there.

[0002]

[Prior Art]

 Conventionally, a plurality of cables such as a power cable or a cord for supplying commercial frequency power and an antenna cable or a feeder line for supplying a high frequency signal from an antenna have been used for televisions and videos depending on the purpose.

[0003] With the westernization of living spaces, there are TVs with casters, portable TVs, etc. that move the TV itself to the desired position on a flooring floor. In this case, the power supply cable or cord and the VHF and UHF antenna cables or feeder lines must be aligned and a plurality of congested cables or wires must be laid on the floor.

Similarly, when the information terminal equipment is also moved to a position where it is used and used, a power cable or cord for power supply and a plurality of cables or electric wires of signal information lines must be laid on the floor.

[0005]

[Problems to be solved by the device]

 As described above, conventionally, the transmission line for the high frequency signal and the transmission line for the commercial frequency power have to be separately wired, which has a drawback that the wiring becomes complicated.

The present invention has been made in view of the above circumstances, and a wiring that can simplify wiring by using a transmission line for high-frequency signals and a transmission line for commercial frequency power together in a common transmission line. The purpose is to provide a device.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides an impedance matching circuit that matches a high frequency signal to the impedance of a transmission line, a mixing circuit that mixes the high frequency signal with commercial frequency power from a commercial power source, and a commercial circuit for the high frequency signal. A mixer consisting of a line filter that suppresses leakage to the power supply side, a transmission line that transmits commercial frequency power and high frequency signals from this mixer, and a high frequency signal transmitted by this transmission line and commercial frequency power are separated. A separating circuit, a high-frequency signal separated by this separating circuit, an impedance matching circuit that matches the impedance of the transmission line, and a shunt that consists of a line filter that suppresses leakage of the high-frequency signal to the power supply circuit. It is a feature.

[0008]

[Action]

 By the above means, the high frequency signal and the commercial frequency power are mixed and transmitted through the common transmission line. In this case, the impedance matching circuit matches the high frequency signal to the impedance of the transmission line, and the line filter suppresses the high frequency signal from leaking to the power supply circuit.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. An impedance matching circuit 11 for matching the impedance of a high frequency signal antenna terminal or information terminal in a room with the impedance of a transmission line such as a transmission cable used for transmission, and an indoor impedance matching circuit 11 are provided. Mixing circuit 12 that mixes the commercial frequency power from the power outlet and the high frequency signal from the indoor antenna terminal or information terminal with the difference in impedance due to each frequency, and the line filter that suppresses the leakage of the mixed high frequency signal to the commercial power source side. The mixer 1 is composed of 13. Further, the transmission line 2 for transmitting the commercial frequency electric power and the high frequency signal is constructed from the cable or the cord or the coaxial cable of the two-core metal wire which satisfies the electrical equipment standard. In addition, the separation circuit 31 for separating the commercial frequency power and the high frequency signal by the impedance difference depending on the frequency of the commercial frequency power and the frequency of the high frequency signal is matched with the impedance of the transmission line such as a transmission cable and the input impedance of the device. The impedance matching circuit 32 and the line filter 33 that suppresses the leakage of the high frequency signal to the power supply circuit constitute the shunt device 3.

That is, the input terminal of the impedance matching circuit 11 of the mixer 1 is connected to the indoor antenna terminal or the information terminal, and the input terminal of the line filter 13 is connected to the indoor commercial power supply socket. The high frequency signal output from the impedance matching circuit 11 and the commercial frequency power output from the line filter 13 are mixed in the mixing circuit 12 and supplied to the shunt 3 via the transmission line 2. In the shunt 3, the separation circuit 31 separates the commercial frequency power and the high frequency signal, and the separated high frequency signal is supplied to an antenna input terminal of a television or the like or an input / output terminal of an information terminal device via an impedance matching circuit 32. Be paid. Further, the commercial frequency power separated by the separation circuit 31 is supplied to a power supply circuit such as a television via a line filter 33.

Here, when the antenna terminal or the information terminal circuit is an unbalanced circuit and the transmission line such as a transmission cable is a balanced circuit, the impedance matching circuits 11 and 32 are circuits having both a balanced / unbalanced conversion circuit. And

Actually, the mixer 1 is housed in an embedded outlet box, and the shunt 3 is housed in a device such as a television, a video, etc. or an information terminal device, and both ends thereof are transmitted via a connector. You can also connect with line 2.

FIG. 2 shows an example of the mixing circuit 12 or the separation circuit 31 of FIG. That is, the first terminal T1 and the second terminal T2 are connected to the impedance matching circuit 11 or the impedance matching circuit 32, and the third terminal T3 and the fourth terminal T4 are connected to the line filter 13 or the line filter 33. The fifth terminal T5 and the sixth terminal T6 are connected to the transmission cable 2. Capacitors C1 and C3 are connected between the first terminal T1 and the fifth terminal T5, a capacitor C2 is connected between the second terminal T2 and the sixth terminal T6, and capacitors C1 and C3 are connected. Is connected to the sixth terminal T6 via the inductor L1. The third terminal T3 is connected to the fifth terminal T5 via the inductor L2, and the fourth terminal T4 is connected to the sixth terminal T6 via the inductor L3.

That is, the frequency band of the high-frequency signal is 91 to 217 MHz for VHF televisions, 471 to 765 MHz for UHF televisions, and the information signal is several tens of megahertz or more with respect to the frequency of the commercial frequency power source of 50 to 60 Hz. Since the frequencies are widely separated, the inductors L2 and L3 of a predetermined value show low impedance when viewed from the frequency of the commercial power source, and high impedance when viewed from the frequencies of VHF, UHF and the high frequency signal of the information signal. Show.

On the contrary, the capacitors C1 to C3 having a predetermined value show a high impedance when viewed from the frequency of the commercial power source, and a low impedance when viewed from the frequencies of the high frequency signals of VHF, UHF and the information signal. Utilizing these contradictory characteristics, the mixing circuit 12 and the separation circuit 31 are formed.

Here, the high frequency signal mixed in the transmission line 2 does not leak to the commercial power source side due to the difference in impedance of the mixing circuit 12 and the action of the line filter 13. Similarly, the mixed high frequency signal does not leak to the commercial frequency power supply circuit due to the difference in impedance of the separation circuit 31 and the action of the line filter 33.

Further, the commercial frequency power mixed in the transmission line 2 does not leak to the circuit side of the high frequency signal due to the high impedance characteristics seen from the commercial frequencies of the mixing circuit 12 and the separation circuit 31.

A TV, video, etc. that operate on a commercial power supply need a line that supplies a minimum amount of power, and use the line for this to connect between the power outlet in the room and the antenna terminal to devices such as the TV. , Or between the power outlet in the room and the information terminal to the information terminal equipment, both the commercial frequency power and the high frequency signal can be transmitted with a single cable or cord to simplify the cables or cords to be used. ..

Further, if the information signal is a high frequency signal separated from the frequency of the commercial frequency power, it can be used as a signal for synchronization, a signal for data transmission, an upstream circuit or a downstream circuit.

[0021]

[Effect of the device]

 As described above, according to the present invention, it is possible to provide a wiring device capable of simplifying wiring by using a transmission line for high frequency signals and a transmission line for commercial frequency power together on a common transmission line. You can

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an example of a mixing circuit or a separation circuit of FIG.

[Explanation of symbols]

1 ... Mixer, 2 ... Transmission line, 3 ... Shunter, 11 ... Impedance matching circuit, 12 ... Mixing circuit, 13 ... Line filter, 31 ... Separation circuit, 32 ... Impedance matching circuit,
33 ... Line filter.

Claims (1)

[Scope of utility model registration request] 1. An impedance matching circuit for matching a high-frequency signal with the impedance of a transmission line, and a mixing circuit for mixing the high-frequency signal with commercial-frequency power from a commercial power supply,
A mixer including a line filter for suppressing the leakage of the high frequency signal to the commercial power source side, a transmission line for transmitting the commercial frequency power and the high frequency signal from the mixer, and the high frequency signal and the commercial frequency transmitted by the transmission line. A separating circuit for separating electric power, an impedance matching circuit for matching the high-frequency signal separated by the separating circuit with the impedance of the transmission line, and a shunt device consisting of a line filter for suppressing leakage of the high-frequency signal to the power supply circuit. A wiring device characterized by: