JPS6115639Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a timer device that performs off control on a television receiver, and particularly relates to a timer device that does not require its own power supply circuit.

When using a television receiver or radio receiver, if the power turns off automatically after the end of the desired program, you can enjoy it freely without worrying about forgetting to turn it off, especially late at night. It is extremely effective when used. A timer device called an off-timer has been developed to meet these demands.

This off-timer device de-energizes the relay connected in series to the power switch of the controlled device to supply power when the clock circuit reaches a predetermined time, for example, 30 minutes or 1 hour. This is to prevent

However, since the off-timer device configured in this way operates independently of the controlled device, the time measured is not from the start of operation of the controlled device, but from the off-timer device itself, which is completely unrelated. This has the problem that the time is measured from the set time. In addition, in the above configuration, the off-timer device itself also requires a power supply circuit to supply power to its own circuit system.
The device becomes large and expensive.

Therefore, an object of the present invention is to provide a timer device that can start timing operation in synchronization with the start of operation of a controlled device and can effectively utilize the power of the controlled device. . Hereinafter, the timer device according to the present invention will be described in detail with reference to the drawings.

The figure is a circuit diagram showing an embodiment of a timer device according to the present invention. In the figure, 1a and 1b are power switches for the television receiver 2, and 3 is an AC relay, which is electrically insulated from the drive winding 3a connected between the output sides of the power switches 1a and 1b. It is composed of a control winding 3b and a contact 3c which are wound in a closed state, and the contact 3c is configured to be closed by connecting both ends of the control winding 3b. 4 and 5 are power switch 1
This is a rectifier circuit and a capacitor that rectify and smooth the output of the AC power supply 5 supplied through the contact points 3c of the AC relay 3 and the contacts 3c of the AC relay 3. Reference numeral 6 denotes a timer mode setting switch provided between both ends of the control winding 3b constituting the AC relay 3. When turned on, the timer mode setting switch 6 becomes the timer off mode, and when turned off, the timer mode setting switch 6 becomes the timer on mode. Reference numeral 7 denotes a start switch interlocked with the timer mode switch 6, and 8 a timer time changeover switch for specifying changeover between, for example, 30 minutes and 1 hour. Reference numeral 9 denotes an integrated clock circuit that measures timer time, including a clock oscillation circuit 9a that starts oscillation in response to the output of start switch 7, and a clock oscillation circuit 9a that starts oscillation in response to the output of start switch 7; sequentially counting the output pulses of the oscillation control circuit 9b and the clock oscillation circuit 9a, which control the oscillation frequency by controlling the oscillation time constant of the circuit 9a;
The counting circuit 9c generates an output when a predetermined value is reached. The timekeeping circuit 9, which is configured by a combination of these parts, is driven by the power output +B output from the power supply circuit provided in the television receiver 2, and is normally "H". It is configured to send out an output and invert to the "L" level when the set timer time is reached. Reference numeral 10 denotes a switch circuit which is operated by the "H" output of the clock circuit 9 supplied via a diode 11 and a resistor 12 to connect both ends of the control winding 3b of the AC relay, and is connected to transistors 13 with mutually opposite polarities. , 14.

In the timer device configured in this way,
With the power switches 1a and 1b closed,
After turning off the timer mode switch 6 and setting the timer mode, if the start switch 7 is operated for a moment, the timer mode switch 6 linked to the start switch 7 is also turned on for a moment. When timer mode switch 6 is turned on,
Since the output ends of the control winding 3b of the AC relay are connected, the AC relay 3 is activated and its contact 3c is closed. When the contact 3c is closed, AC power is supplied to the rectifier circuit 4, and the rectified output is smoothed by the capacitor 5 and then supplied to the television receiver 2. Therefore, this television receiver 2 receives power and receives television broadcasting, and also supplies a part of the circuit power used internally to the clock circuit 9 as power +B. As a result, the clock circuit 9 receives power supply for the first time at this point, and in conjunction with this, the "H" level output is sent to the switch circuit 10 via the backflow prevention diode 11 and resistor 12. supply switch circuit 1
0 receives the "H" level signal, transistors 13 and 14 are both turned on, thereby turning on the control winding 3 provided in the AC relay 3.
b is connected between both ends, and in this state, the clock circuit 9 reaches the preset clock time and its output becomes "L".
This will continue until it reverses. Therefore,
By simply closing the timer mode switch 6 for a short period of time until the switch circuit 10 is turned on, power supply to the television receiver is started and that state is maintained.

On the other hand, when the start switch 7 is activated, it selects the power supply +B and supplies an "H" level start signal to the clock oscillation circuit 9a, thereby starting clock oscillation. In this case, the oscillation period of the clock oscillation circuit 9a is set in accordance with the designated timer time by the oscillation control circuit 9b which receives the selection output of the timer time changeover switch 8 as an input. The outputs of the clock oscillation circuit 9a thus oscillated are sequentially counted in a counting circuit 9c. When this count value reaches a predetermined set value, the output of the counting circuit 9c becomes "H".
The signal is inverted from "L" to "L", and the switch circuit 10 is accordingly turned off. In this case, the timer mode setting switch 6 is momentarily closed only when the start switch 7 is operated, and remains open thereafter, so that the connection of the control winding 3b of the AC relay 3 is opened at the same time as the switch circuit 10 is turned off. will be done. Therefore, since the AC relay 3 is deactivated and the contact 3c is opened, the output of the rectifier circuit 4 is cut off, cutting off the power supply to the television receiver 2 and completing the off-timer operation. When the power supply to the television receiver 2 is cut off, the supply of the circuit power supply +B to the clock circuit 9 is also cut off, and the AC relay 3 continues to be in an inoperable state.

Next, when the timer mode setting switch 6 is closed, the timer off mode is set, and in conjunction with this, both ends of the control winding 3b of the AC relay 3 are kept connected, so the AC relay 3 is activated. Contact point 3c will also continue to be closed. Therefore, regardless of the output of the clock circuit 9, the power switch 1 can be turned off like a normal television receiver.
The power can be turned on and off just by operating a and 1b.

In the circuit configured in this way, not only does the power supply +B be received from the television receiver 2, but this power supply +B also includes a signal to start supplying power to the television receiver 2. Since the control system is configured by cleverly utilizing signals, this is one of the factors that simplifies the circuit configuration. Furthermore, since a single power supply device is used, it greatly contributes to the space factor and cost.

As explained above, the timer device according to the present invention is provided with a clock circuit that is activated by the power supply circuit output of a controlled device such as a television receiver, and uses the output to perform hold control on an AC relay. The power supply to the control equipment is maintained, and the hold of the AC relay is released by the clock completion output of the clock circuit. Therefore, it is possible to improve the space factor and price by using the power supply circuit as well, and to simplify the circuit by effectively utilizing the on/off information included in the power supplied from the controlled equipment. It has various excellent effects such as stabilization.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of a timer device according to the present invention. 1a, 1b... power switch, 3... AC relay, 4... rectifier circuit, 6... timer mode changeover switch, 7... start switch, 9... timing circuit, 10... switch circuit.

Claims (1)

[Scope of utility model registration request] an AC relay having a drive winding and a control winding connected between the outputs of a power switch; contacts of the AC relay connected in series between the power switch and a power circuit of a controlled device; and control of the AC relay. A timer mode setting switch connected between both ends of the winding and momentarily closed in conjunction with the start switch; and a timer mode setting switch that is operated in response to the power output of the controlled device to generate an output and start timing by the start switch. and a switch circuit connected in parallel to the timer mode setting switch and controlled by the output of the timer mode setting switch. timer device.