JPS62145936A - Receiver - Google Patents

Abstract

PURPOSE:To stop surely the operation of a receiver when no transmission wave is sent by providing a means detecting the presence of a transmission wave so as to turn off a power changeover switch. CONSTITUTION:A television signal S is not received after a point of time A and the broadcast is finished. Power is fed from a commercial power supply to a receiver 1 and the television signal S is received via a reception antenna 2. When the broadcast is finished at the point of time A and the television signal S is not received, then it is detected by a detector 11 and a control signal R is outputted to a timer 12. The timer 12 is started by the control signal R and when a prescribed time is counted, a detection signal T is outputted. Then a changeover switch 13 is opened, no power is fed to the receiver 1, which stops the operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a receiving device (for example, a television receiving device, etc.)
In particular, the present invention relates to a receiving device that is configured to automatically turn off the power when transmission waves are no longer being transmitted.

[Conventional technology]

2. Description of the Related Art Conventionally, television receivers are known that are equipped with a switching system that automatically turns off the power when a set time has elapsed.

FIG. 2 shows this type of television receiver.

In the figure, 1 is a receiver, and the receiver 1 is driven by being supplied with electric power from a commercial power source.

Here, the receiver 1 is equipped with a receiving antenna 2,
It receives a television signal S transmitted from a broadcasting station.

3 indicates a switching system attached to the receiver 1. The switching system 3 includes a time setting section 4 and a set time display section 5.
It is roughly composed of a switch 7, a switch 7, and a normally closed switch 7.

The time setting section 4 is configured to input and set the time until the power is turned off. Further, the set time display section 5 is adapted to display the time input and set by the time setting section 4. Furthermore, the timer 6 is equipped with a timer switch 6A, and outputs a detection signal P when it is started by operating the timer switch 6A and measures the time input and set in the time setting section 4. It looks like this. Here, as the timer 6 measures time, the display time of the time display section 5 is gradually decreased, and the passage of time is sequentially displayed. Further, the changeover switch 7 is located between the receiver 1 and the power source, and is opened when the detection signal 6 is input manually from the timer 6. As a result, the supply of power to the receiver 1 is stopped.

Next, the operation will be explained.

The time setting section 4 inputs and sets the time until the power is turned off. The set time is displayed on the set time display section 5.

Next, by pressing the timer switch 6A, the timer 6
starts. When the timer 6 is activated, the built-in clock sequentially displays the display time on the set time display section 5 until the power is turned off. Then, the time on the set time display section 5 is 0.
When this happens, the timer 6 opens the changeover switch 7 to automatically turn off the power.

[Problems to be Solved by the Invention] However, the above-described television receiving apparatus has the following problems. That is, the receiver 1 remains in operation until the time input and set in the time setting section 4 elapses. Therefore, if the broadcast ends during that time, the receiver 1
There was a problem that the system was left in an active state.

[Means for solving problems]

The receiving device according to the present invention includes a changeover switch that opens and closes between a power source and a receiver, and a detection means that detects the presence or absence of a transmitted wave and turns off the changeover switch.

[Effect]

When the transmission wave is not transmitted, the detection means turns off the changeover switch and cuts off the power input.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. Note that the same components as those in the prior art are given the same reference numerals and the description thereof will be omitted.

However, 11 is a detector, and the detector 11 detects the television signal S received by the receiving antenna 2, and outputs the control signal R when the television signal S is no longer received. It has become.

Reference numeral 12 denotes a timer activated by the control signal R, and the timer 12 outputs a detection signal T when a predetermined time has elapsed after the control signal R was input.

The timer 12 and the detector 11 constitute a detection means. 13 indicates a normally closed changeover switch located between the commercial power source and the receiver 1.

The changeover switch 13 is opened by manually inputting the detection signal T. As a result, receiver 1
The power supply to will be stopped. Note that when the detector 11 receives the television signal S within a predetermined time after the timer 6 is started, the timer 6 is initialized.

Next, the effect will be explained.

First, it is assumed that the television signal S is not received after time A and the broadcast ends.

It is assumed that, before the above-mentioned time point A, the receiver 1 is supplied with power from a commercial power source and is receiving the television signal S via the receiving antenna 2.

It is assumed that after that, the above-mentioned time point A is reached, the broadcasting ends, and the television signal S is no longer received.

Then, the detector 11 detecting this outputs a control signal R to the timer 12. The timer R is activated by a control signal R, and outputs a detection signal T when a predetermined time has elapsed. Then, the changeover switch 13 to which the detection signal T is input is opened. Thereby, the receiver 1 is no longer supplied with power and therefore stops working.

Although the timer 6 is used for measurement in the above embodiment, the wavelength of the AC wave of the power supply used in the receiver 1 may be used to measure the time. Further, in the above embodiment, the case of a television receiver has been described, but a radio may also be used, and the same effects as in the above embodiment can be obtained.

〔Effect of the invention〕

As explained above, the receiving device according to the present invention opens the power switch when the transmitted wave is not received for a predetermined period of time, so that the operation of the receiver is reliably stopped when the transmitted wave is no longer transmitted. be able to.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the present invention, FIGS. 2 and 3 are related to the prior art, FIG. 2 is an external view, and FIG. 3 is a block diagram. DESCRIPTION OF SYMBOLS 1... Receiver, 11... Detector, 12... Timer, 13... Changeover switch, H... Detection means,

Claims (1)

[Claims] In a receiving device that is driven by power supplied from a power source and includes a receiver that receives transmitted waves, a changeover switch that opens and closes between the power source and the receiver, and a detection means that detects the presence or absence of the transmitted wave. 2. A receiving device, characterized in that said detecting means opens said changeover switch when said transmitted wave is not received for a predetermined period of time.