JPS5848594A - Power supply controlling circuit - Google Patents

Abstract

PURPOSE:To reduce the capacity of a power supply switch, by directly connecting the power switch for remote control circuits to a power supply. CONSTITUTION:A power supply obtained from a power plug 1 is applied to a load 4 such as a TV circuit via a current hold type relay 3. A power supply is given to a reception section 6 of a remote controller via a power switch 2'. In closing the switch 2', the reception section 6 is energized, the relay 3 is closed and a current flows to the load 4. In this state, the relay 3 is switched in response to an output signal change of the reception section 6 with a signal from a transmitter (not shown). Since the load for the switch 2' is a transformer 5 only, a contact permissible current of the switch 2' can be less.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power control circuit for, for example, a television receiver, which is equipped with a remote control device, and an object of the present invention is to provide a power control circuit having functions equivalent to conventional ones at a lower cost. do.

A conventional power supply control circuit is shown in FIG. In the figure, 1 is a power plug, 2 is a switch, 3 is a current holding type relay, and 4 is a load, for example, a television circuit.

In the above configuration, when the switch 2 is closed, current flows through the transformer 5, the receiving section 6 is energized, the relay 3 is closed, and the load 4
Current also flows through the In this state, the relay 3 opens and closes in response to a change in the output signal of the receiver 6 based on a signal from a remote controller transmitter (not shown). Therefore, when the transmitter transmits a control signal to open the relay 3, the power supply to the load 4 can be stopped even though the switch 2 is closed.

Also switch 2. When the switch 2 is opened from the state where both the relays 3 are closed, the power to the receiving section 6 is cut off, so the relay 3 is opened. That is, by opening switch 2,
All circuits are open and safety is maintained.

However, when looking at the switch 2 in this configuration, its contact capacity is required to be large because in addition to the load of the transformer 5, the load 4 of the television circuit is inserted.
It had the disadvantage of being expensive.

The present invention eliminates the above-mentioned conventional drawbacks.

An example of this will be described below with reference to FIG. Components in the drawings that are the same as those in FIG. 1 will be described with the same reference numerals.

The difference in Fig. 2 from Fig. 1 is that the switch 2''
The point is that the switch 2' is inserted so that only the transformer 5 is inserted as a load. In this configuration, switch 2
When closed, current flows through the transformer 5, the receiving section 6 is energized, and the relay 3 is closed. As a result, current also flows to the load 4. In this state, the three relays open and close in response to a change in the output signal of the receiver 6 due to a signal from a transmitter (not shown). Furthermore, from the state where both the switch 2' and the relay 3 are closed, the switch 2''& IJ < and the receiving part 6 stop operating, and the relay 3 opens. That is, by opening the switch 2'', All circuits are opened and safety is maintained.The function is thus the same as the circuit shown in Figure 1, but in the circuit shown in Figure 2, the load on switch 2' is only transformer 6. Therefore, a switch with a small allowable contact current can be used as the switch 2'.In addition, the relay 37d in FIG. 2 may be replaced with a thyristor.

As explained above, according to the present invention, when the remote control receiving section is powered on by the power switch of the remote control receiving section, the switch circuit provided in the remote control receiving section is closed and power is supplied to the load. By configuring the switch circuit to open and stop power supply to the load when the power switch of the remote control receiver is opened, it can be used as the power switch while having the same functions as conventional ones. It is possible to provide a small contact capacitance, and an inexpensive power supply control circuit can be provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a conventional power supply control circuit, and FIG. 2 is a diagram showing the configuration of a power supply control circuit in an embodiment of the present invention. 1...--Power plug, 2'...=...Power switch, 3 a@@@...Switch circuit, 411@...
e Load, 5·φ...-transformer, 6...Receiver for remote control.

Claims (1)

[Claims] A remote control receiver, a dedicated power switch for the remote control receiver, and a power switch that closes when power is supplied to the remote control receiver to supply power to the load, and opens when the power supply is stopped to supply power to the load. a switch circuit whose opening/closing is controlled by a control signal from a remote control transmitter via the receiver when the power supply to the load is stopped and the power is supplied to the remote control receiver; A power supply control circuit 0 comprising