JPS6244456Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a feeder coupler used in a video signal transmission system for coupling a video signal from a video tape recorder to a television receiver.

Conventionally, in order to display the recorded content of a video tape recorder (hereinafter abbreviated as VTR) on a television receiver (TV), the output signal of the VTR was sent to the television receiver via a parallel feeder or coaxial cable. It was necessary to connect to the signal input terminal each time. This is extremely troublesome and inconvenient in these days when more than one television receiver is present in each household. Connection is also necessary when borrowing a VCR from a neighbor, and since most television receivers are installed in the corners of rooms,
Connecting a VTR often involves moving the television receiver, making the connection not easy and extremely inconvenient.

This idea was made in view of the above circumstances,
The object is to provide a feeder combiner suitable for a video signal transmission system that can easily combine the output signal of a VTR to a television receiver.

This idea connects a feeder line, such as a coaxial cable, that transmits signals from a VTR to a conductive coupling pin, and press-fits this coupling pin into the core wire of a parallel feeder connected to a television receiver. The output signal is coupled to a television receiver.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a video signal transmission system using the feeder coupler of this invention. In the same figure, 1 is a VTR, 2
amplifies the output signal of VTR1 to an appropriate level,
Or a video transmitter that has the function of converting the frequency to the UHF band and selects and outputs either signal.
An example of the configuration is shown in FIG. Reference numeral 3 denotes a coupling means for coupling the output signal of the video transmitter 2 to the television receiver 4. For example, there is a feeder coupler directly connected to a television feed line (parallel feeder) as shown in FIG.

First, the video transmitter 2 will be explained. Generally, the output signal level of VTR1 is about 70dBμV, which is insufficient in terms of signal level for this system as it is, and since the frequency band of this signal is usually the VHF band, it should be converted to the UHF band. It is also necessary. This is because the UHF band has a higher frequency, which makes it easier to couple the signal to the feed line (parallel feeder) of the television receiver. In other words, signal leakage from the parallel feeder is greater in the UHF band than in the VHF band, so this is advantageous when connecting external signals to the parallel feeder via an antenna or the like in a non-contact manner. It means that. Taking these into consideration, the configuration of the video transmitter 2 was designed as shown in FIG.

In the figure, 5 is a signal input terminal, and this terminal 5 is connected to the input end of the first amplifier 6. The first amplifier 6 is a relatively low-noise amplifier that amplifies and outputs the signal (VHF signal) input to the input terminal 5, and its output terminal is connected to the input terminal of the variable attenuator 7. The variable attenuator 7 adjusts the level of the output signal of the first amplifier 6, and its output terminal is connected to the input terminal of the second amplifier 8. The second amplifier 8 amplifies the output of the variable attenuator 7 to a predetermined level, and its output end is connected to the movable contact a of the switch _S1 . switch
One fixed contact b of _S1 is connected to the input end of the bandpass wave generator A9. This bandpass waver A9
is for passing only the VHF band television signal _FV out of the output of the switch _S1 , and its output end is connected to one fixed contact b of the switch _S2 which is interlocked with the switch _S1 . 10 is the local oscillation signal F _L
The output terminal of this oscillator 10 is connected to one input terminal of a mixer 11. At the other input end of the mixer 11 is a switch _S1 .
The other fixed contact c is connected. mixer 1
1 mixes the output signals of the switch S ₁ and the local oscillator 10, and its output end is connected to the bandpass waver B.
12 input terminals. This bandpass waveformer B12 passes only the UHF band television signal _FU out of the output of the mixer 11, and its output end is connected to the other fixed contact c of the switch _S2 . A signal output terminal 13 is connected to the movable contact a of the switch _S2 .

With the above configuration, next we will install this video transmitter 2.
Explain the operation. First, when the movable contact a of the interlocking switches S ₁ and S ₂ is turned on to the fixed contact b side,
The VHF band television signal F _V from the VTR 1 is amplified by a first amplifier 6, level-adjusted by an attenuator 7, further amplified to a predetermined level by a second amplifier 8, and then band-pass filtered. After A9,
The signal is output from the output terminal 13 as a VHF band television signal _FV . Therefore, when the movable contacts a of the interlocking switches S ₁ and S ₂ are switched to the fixed contacts c side, the signal F _V is input to the mixer 11, and the local oscillator 1
is mixed with the local oscillator signal F _L from 0, where
After being frequency-converted to a UHF band signal, the signal passes through a bandpass transducer B12 and is outputted from an output terminal 13 as a UHF band television signal _FU . In this way, the video transmitter 2 has the function of amplifying and adjusting the output signal of the VTR to an appropriate level and outputting it as a television signal in the VHF band or UHF band.

Next, the feeder coupler 14 shown in FIG. 3 will be explained as the coupling means 3. This feeder combiner 1
4 is composed of a coupling pin mounting base 15 and a receiving base 16 made of a resin material such as ABS resin, and has a structure in which a parallel feeder 17 is sandwiched between them. The parallel feeder 17 is
It connects an ordinary television receiver 4 and its receiving antenna. Connection pin mounting base 1
5 has an opening on its upper surface, and two conductive coupling pins 18 and 19 are fixed in parallel to each other by driving or the like on the lower surface thereof in accordance with the distance between the core wires of the parallel feeder 17. These coupling pins 18,1
The tip of 9 is formed at a somewhat acute angle. Further, an opening is provided in the side surface of the coupling pin mount 15, and the other end of the coaxial cable 20, one end of which is connected to the output terminal 13 of the video transmitter 2, is inserted into this opening and connected with adhesive. Fixed. The center conductor 2 of this coaxial cable 20
1 is connected and fixed to one coupling pin 19, and the outer conductor 22 is connected and fixed to the other coupling pin 18, for example, by soldering. Further, a lid 23 is fastened and fixed to the upper surface of the coupling pin mount 15 with screws 24.
On the other hand, the side surface of the receiving stand 16 is formed into a horizontal U-shape, and the coupling pin mounting stand 15 is housed in the recessed portion thereof together with the parallel feeder 17.
The upper ends of the vertical pieces 25, 25 at both ends of the pedestal 16 are provided with protrusions 26, 26 that extend inward in the horizontal direction. It is designed to hold. Furthermore, this pedestal 16
Holes 27 and 28 for receiving the coupling pins 18 and 19 of the coupling pin mount 15 are formed in the bottom of the parallel feeder 17 in accordance with the core wire spacing of the parallel feeder 17.

Since this feeder coupler 14 has the above-described configuration, the parallel feeder 17 is inserted between the coupling pin mount 15 and the cradle 25 like a sanderch, and by applying a certain amount of force, the coupling pin 18 , 19 sticks into the parallel feeder 17,
Coaxial cable 20 and parallel feeder 17 are directly electrically connected. Coupling pin mounting base 15 and cradle 2
5 is firmly fixed by the protrusions 26, 26, but can be easily removed by applying a certain amount of force.

In this way, according to the present feeder coupler 14, it is possible to couple the parallel feeder 17 in a so-called one-touch operation by simply inserting the parallel feeder 17 and applying a certain amount of force.
There is no need for complicated work such as changing feeder connections.
Extremely convenient. Furthermore, this method is effective even when the levels of the signals to be combined are low because there is almost no coupling loss. In addition, the connecting pin 18, 1
By making the tip shape of 9 somewhat acute,
Can be bonded with weaker force.

In the above embodiment, the coaxial cable 20 is connected between the coupling pin mount 15 and the video transmitter 2.
In this embodiment, a parallel feeder may be used instead. or,
The coupling pin mounting base 15 is integrally formed by molding after connecting the coupling pins 18 and 19 to the coaxial cable 20.
8 and 19 may be fixed.

As mentioned above, the feeder coupler of this invention can be coupled to a television feeder with a single touch with almost no coupling loss, so when used in conjunction with a video transmitter, the output signal of a VTR can be transmitted to a television receiver extremely easily. Can be combined.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
2 is a block diagram showing the structure of a video signal transmission system, FIG. 2 is a block diagram showing the structure of a video transmitter, and FIG. 3 is a perspective view showing the structure of a feeder combiner. DESCRIPTION OF SYMBOLS 1...video tape recorder, 2...video transmitter, 3...coupling means, 4...television receiver, 14...feeder coupler, 15...coupling pin mounting base, 16...cradle, 17 ...Parallel feeder, 18, 19...Coupling pin, 20...Coaxial cable.

Claims (1)

[Scope of utility model registration request] Two electrically conductive connections arranged parallel to each other at the same spacing as the core spacing of the parallel feeder connected to the first device, and electrically connected to a feeder line that transmits a signal from the second device. A pin, a coupling pin mount to which the coupling pin is fixed, and a cradle having means for accommodating and holding the coupling pin mount and the parallel feeder; With the parallel feeder sandwiched between the bases, the two coupling pins are inserted into the core wires of the feeder, respectively, and the parallel feeder and the feeder line that transmits the signal from the second device are connected. A feeder coupler characterized by electrical connection.