JPS5848836Y2 - TV reception amplifier - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a television reception amplifier that amplifies a television signal received by an antenna and supplies the amplified signal to a television receiver.

This type of television receiving amplifier generally includes an antenna connection terminal 7k in one case 30, as shown in FIG.
TV connection terminal 8k, amplifier circuit 9k, power transformer 17
On the other hand, a plug 16k for plugging into an outlet is connected to a power transformer 17k via a connection cord 31.

If such a configuration is used for a long period of time, if the high voltage power that has just been drawn from the plug 16k leaks to the connection terminal 7 and 8k,
If these terminals 7 touch 8k, there is a risk of electric shock.

In addition, the configuration described above has the disadvantage that the heat emitted from the power transformer 17k reaches the amplifier circuit 9k, deteriorating its characteristics, and in order to eliminate such a disadvantage, a large number of heat dissipation holes are provided in the case 30. If such holes are provided to improve their heat dissipation properties, there is another problem in that dust may enter through the holes and deteriorate the characteristics of the amplifier circuit 9.

Therefore, the present invention aims to provide a television receiving amplifier having a structure that maintains high safety even in the above-mentioned cases and also maintains good characteristics of the amplifier circuit.

The drawings showing the embodiments of the present application will be described below.

In FIGS. 1 to 3, reference numeral 1 indicates a television receiver placed in a corner of the room, reference numeral 2 indicates a commercial power outlet provided on the wall of the room, and reference numeral 3 indicates a television antenna.

4 indicates a television reception amplifier. In this amplifier 4,
Reference numeral 5 indicates a first case, and reference numeral 6 indicates a second case, both of which have a sealed structure.

Note that the first case 5 is formed using polyvinyl chloride, for example.

Further, heat radiation holes may be formed in the second case 6.

Furthermore, the second case 6 is preferably formed using a heat-resistant, self-extinguishing material such as tetrafluoroethylene or PPO.

Next, first, the members arranged in the first case 5 will be explained.

Reference numeral 7 denotes an antenna connection terminal, and 8 denotes a television connection terminal, both of which are constructed so that a coaxial cable connector can be connected using a connector seat.

Reference numeral 9 indicates an amplifier circuit disposed within the case 5, which has a well-known circuit configuration as shown in FIG. 3 as an example.

That is, in FIG. 3, 10 is a branching circuit, 11.12 is an amplifying section, 13 is a mixing circuit, and 14 is a rectifying and smoothing circuit.

Reference numeral 15 denotes a power switch, which is mounted so as to be exposed outside the case 5, as shown in FIG.

Note that this amplifier circuit 9 may be any other well-known or publicly known circuit.

Next, the power supply device provided in the second case 6 will be explained.

Reference numeral 16 denotes a plug, which is configured to be inserted into the outlet 2.

17 is a power transformer that converts 100 V AC power to 30 V.
It is configured to step down the voltage to the following low voltage.

18 is a capacitor for high frequency passage.

Next, reference numeral 19 denotes a connecting electric wire cord, which is configured to connect the low voltage side of the power transformer 17 and the amplifier circuit 9, as clearly shown in FIG.

For those with the above configuration, from outlet 2 to plug 1
When the high voltage power supply is received by 6, it is immediately stepped down by the power transformer 17.

The step-down low voltage power supply is sent to the amplifier circuit 9 in the first case 5 via the electric wire cord 19.

Then, the amplifier circuit 9 performs a well-known operation.

As a result, the television signal received by the antenna 3 is input to the amplifier circuit 9 from the connection terminal 7, where it is amplified to a sufficient level compared to the input level of the television receiver 1, and then the television signal is received from the connection terminal 8. Sent to machine 1.

Next, FIG. 4 shows a different embodiment of the present application.

In the figure, the antenna connection terminal 21 is configured so that a coaxial cable used as a power supply line can be directly connected, and the TV connection terminal is configured to connect to the coaxial cable connection section 22.
a and a feeder connection part 22b, so that any feeder line can be connected.

23 indicates a sucker. By using the suction cup 23, the device having such a structure can be used by being fixed to the side wall of the television receiver 1a, as shown in FIG. 5, for example.

It should be noted that parts that are considered to have the same or equivalent structure as those in the previous figure in terms of function are given the same reference numerals as in the previous figure with the letter e, and redundant explanations are omitted.

(Furthermore, the same idea will be applied to the next editions as well, and the alphabet 19g will be added in order to omit repeated explanations.

) Next, FIG. 6 shows a different example of the circuit configuration, and shows an example in which the rectifying and smoothing circuit 14f is housed in the second case 6f.

The circuit 14f is constructed in a well-known manner by a rectifying diode D1, a smoothing capacitor C1, and a positive characteristic thermistor Th1.

Next, FIG. 7 shows an example in which the second case 6g is equipped with an outlet 25 into which the plug 24 of a television receiver can be inserted, and the circuit configuration is as shown in FIG. 8. .

Next, FIG. 9 shows an example in which the first case is further divided into two parts, where one case 26 is equipped with an antenna connection terminal and an amplifier circuit, and the other case 27 is equipped with a TV connection terminal and a power supply. It is equipped with a switch.

The two are connected using a connection cord 28 (for example, a coaxial cable), and power is supplied to the amplification section and a television signal is transmitted from the amplification section to the television connection terminal via this cord 28. That's how it is.

As described above, in this invention, the antenna connection terminal 7
This system amplifies the TV signal received from the TV receiver 1 and outputs the amplified signal from the TV connection terminal 8 to the TV receiver 1. Therefore, the signal is transmitted to the receiver 1 at a sufficient level to ensure a good signal. This has the effect of making it possible to obtain a beautiful screen.

Moreover, in the present invention, the power transformer 17 is provided in the second case 6 which is separate from the first case 5 in which the amplifier circuit 9 is disposed.
At the same time, this second case 6 is equipped with a plug 16 for plugging into an outlet, and the high voltage power supplied manually to the plug 16 is immediately stepped down by the power transformer 17, thereby converting it into a low voltage one. Power is supplied to the amplifier circuit 9 via the power cord 19, that is, power is not sent or received from the antenna connection terminal 7 or the TV connection terminal 8, so these terminals 7 , 8 to the antenna 3 or the receiver 1 can be used purely for the purpose of transmitting television signals.

Furthermore, since the present invention has the above-mentioned configuration, for example, during long-term use, the power drawn into the amplifier circuit 9 may for some reason connect to the electrical connections such as the antenna connection terminal 7 and the TV connection terminal 8. Safety that can prevent accidents such as electric shock even if you touch the connection terminals 7 and 8 for cleaning etc. without knowing it in the event of leakage. There is.

Moreover, as mentioned above, since the first case does not have a power supply device, the first case 5 in which the amplifier circuit 9 is housed has a second case compared to the conventional structure shown in FIG. As shown in the figure, it can be extremely miniaturized, and when in use, as shown in Figures 1 and 5, its existence is almost unnoticeable, and it has a well-designed design. This also has the effect of preserving the aesthetic appearance of the television receiver 1.

Furthermore, with the above configuration, the thermal influence of the power transformer 17 on the amplifier circuit 9 can be completely eliminated, and the characteristics of the amplifier circuit 9 can be maintained constant over a long period of time.

Furthermore, since there is no thermal effect as described above, the first case 5 in which the amplifier circuit 9 is provided can be sealed, and the case 5
There is also a side effect that can prevent dust from entering the amplifier circuit 9 and maintain good characteristics of the amplifier circuit 9.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a diagram showing an installed state, FIG. 2 is a perspective view, FIG. 3 is a block circuit diagram, and FIG. 4 is a perspective view showing a second embodiment. 5 is a diagram showing the same installation state, FIG. 6 is a block circuit diagram showing the third embodiment, FIG. 7 is a perspective view showing the fourth embodiment, FIG. 8 is the same circuit diagram, and FIG. The figure shows a fifth embodiment, and FIG. 10 is a perspective view of a conventional example. 5...First case, 7...Antenna connection terminal, 9...Amplification circuit, 8...TV connection terminal, 6...・Second case, 17...
...Power transformer, 16...Plug.

Claims (1)

[Scope of utility model registration request] An antenna connection terminal for inputting the television signal from the antenna, an amplification circuit for amplifying the signal input to the connection terminal, and an amplification circuit for outputting the amplified television signal to the television receiver. In a television reception amplifier comprising a television connection terminal and a power supply device configured to supply power to the amplifier circuit, the antenna connection terminal, the amplifier circuit, and the television connection terminal are provided in a first case, while the power supply device The device is provided in a second case separate from the first case, and the power supply device includes a plug for plugging into an outlet and a power transformer capable of stepping down the input voltage from the plug. 2. A television receiving amplifier characterized in that the amplifier circuit disposed in the first case and the power supply device disposed in the second case are connected by an electric wire cord.