JPH0143412B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling a load such as a lighting fixture.

Conventionally, for example, in a circuit that operates a switch by remote control to control the lighting of lighting equipment, etc., if the transmitter is lost or the transmitter is not at hand, the switch can be operated. I will not be able to do it.

The present invention solves the above-mentioned technical problems and provides a load control device that can operate a remote control switch by determining whether a switch attached to a lighting fixture or the like is turned on or off. purpose.

The present invention provides a load control device that operates a load by driving a relay in response to a signal transmitted by remote control and changing conduction and cutoff of the relay switch. and means for connecting the fuselage switch attached to the load and determining whether the fuselage switch is conductive or disconnected; and in response to the output of the determining means, when the fuselage switch is made conductive, (a) the relay switch is activated. (b) When the relay switch is conductive, the relay switch is activated by driving the relay to conduct the relay switch; and (b) when the relay switch is conductive, the fuselage switch is This is a load control device characterized in that it includes means for maintaining a conductive state of a relay switch even if the relay switch is cut off.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical circuit diagram of one embodiment of the present invention. The input signal detection circuit 1 receives a signal from an oscillator (not shown) and applies a high level signal to the reset terminal R of the buffer G1 and flip-flop FF2. The output of buffer G1 is applied to the clock input terminal Cp of flip-flop FF1.
Flip-flops FF1 and FF2 have a function of outputting a high-level signal input to a data input terminal D to a set output Q when a high-level signal is input to an input terminal Cp. Note that the set terminals S of flip-flops FF1 and FF2 are grounded, and the reset terminal R of flip-flop FF1 is grounded.
is grounded.

The set output Q of flip-flop FF1 is connected to buffer G3 and input D of flip-flop FF2.
given to. The reset output of flip-flop FF1 is connected to buffer G4 and flip-flop
It is given to input D of FF1. Batsuhua G3,G
The output of 4 is given to the gates of thyristors S1 and S2, and coils 3 and 4 connected in series to thyristors S1 and S2, respectively, are provided in association with relay 5. That is, when the coil 3 is energized, the relay switch 6 is cut off, and when the coil 4 is energized, the relay switch 6 is turned on. The series circuit of thyristor S1 and coil 3 and the series circuit of thyristor S2 and coil 4 are connected to a full-wave rectifier circuit 7, and this full-wave rectifier circuit 7 is connected to an AC power source 8.

Note that a diode d2 and a resistor R1 are provided between the input signal detector 1 and the buffer G1. Further, a resistor R2, a diode d3, and a resistor R4 are provided in association between the buffer G3 and the thyristor S1.
A resistor R3, a diode d6, and a resistor R5 are provided in relation to the resistor R3, the diode d6, and the resistor R5. Diodes d7 and d8 are connected in parallel to the coils 3 and 4, respectively.
Resistor R2 and diode d3, and resistor R
3 and diode d6 are diode d4,
Buffer G1 and flip-flop via d5
It is connected in parallel with the input terminal Cp of FF1.

The relay switch 6 is connected in series to a connector 9 having a pair of connection ends 9a and 9b, and this series circuit is connected to an AC power source 8. A fuselage switch 10 and a lamp 1 are connected to both connection ends 9a and 9b of the connector 9.
A load circuit 12 consisting of 1 is connected. Connector 9
A series circuit consisting of resistors RA, RB and diode d9 is provided in parallel with the series circuit consisting of relay switch 6 and relay switch 6. A neon lamp NL is interposed between the resistors RA and RB, and between the connector 9 and the relay switch 6. Diode d1 and capacitor C are connected between diode d9 and resistor RB.
A resistor RC is connected to the buffer G2 via a detection circuit 13 consisting of 1, and a resistor RC is provided in association between the detection circuit 13 and the buffer G2. The output of buffer G2 is applied to the input terminal Cp of flip-flop FF2. Further, the set output Q of flip-flop FF2 is applied to buffer G1 via capacitor C2, resistor R7, and diode d10.

In such a circuit, it is assumed that the relay switch 6 is cut off. In this case, if the aircraft switch 10 is cut off, the discrimination voltage V applied to the buffer G2 will be a very low value compared to the threshold voltage of the buffer G2, and therefore the output of the buffer G2 will be at a low level. It is. In this state, when the aircraft switch 10 becomes conductive, the neon lamp NL lights up and the neon lamp
Potential at the connection point of NL and resistors RA and RB
When VA occurs, the discrimination voltage V is divided by resistors RB and RC and slowly rises, and when it reaches the threshold voltage of buffer G2, a high level signal is sent from buffer G2 to the input terminal Cp of flip-flop FF2. is input. Here, since a high level signal is input to the input terminal D of flip-flop FF2, the set output Q of flip-flop FF2 becomes high level. Therefore, the high-level set output Q is differentiated by the capacitor C2 and then applied to the buffer G1, and accordingly, a high-level signal is input to the input terminal Cp of the flip-flop FF1. Here, flipflop
Since the low level reset output Q was input to the input terminal D of the FF1, the set output Q becomes low level and the reset output becomes high level, the coil 4 is excited and the relay switch 6 is made conductive. In this state where the relay switch 6 is cut off, by making the fuselage switch 10 conductive, the relay switch 6 is also made conductive and the lamp 11 is lit (first operation mode).

If the fuselage switch 10 is turned off and then turned on again in this state, the signal input to the buffer G2 changes from high level to low level to high level, but the input terminal D of flip-flop FF2 is connected to flip-flop FF1. Since the low level set output Q from the flip-flop FF2 is input, the set output Q of flip-flop FF2 remains at high level and does not change. Therefore, the relay switch 6 remains conductive. In this way, relay switch 6
After the fuselage switch 10 is turned off, the lamp 11 is turned off, and when the fuselage switch 10 is turned on, the lamp 11 is turned on (second operation mode).

Next, when the signal from the oscillator is input to the input signal detection circuit 1, the flip-flop FF2
A high level signal is input to the reset terminal R of the flip-flop FF2, thereby resetting the flip-flop FF2. At this time, a high level signal is also input to the input terminal Cp of the flip-flop FF1, so that the coil 3 is energized and the relay switch 6 is cut off. When the relay switch 6 is in a conductive state and the machine body 10 is in a state where it is possible to control the lighting and extinguishing of the lamp 11, when a signal from the transmitter is input to the input signal detection circuit 1. , the relay switch 6 can be shut off. Therefore, (a) when the fuselage switch 10 is in the conductive state, the input signal detection circuit 1 can turn on and off the relay switch 6 to control the lighting and extinguishing of the lamp 11 ( 3rd operation mode),
(b) Or when the fuselage switch 10 is cut off, the relay switch 6 is activated by the input signal detection circuit 1.
The lamp 11 remains off (fourth operating mode).

Note that the fuselage switch 10 in the load circuit 12
The ability to determine continuity and interruption of resistance RA,
It can be adjusted arbitrarily by selecting RB, RC and capacitor C1.

Next, assume that the relay switch 6 is conductive. In this case, flip-flop FF2
A low level signal is input to the input terminal D of. Now, if the fuselage switch 10 changes from the cut-off state to the conductive state, the signal input to the buffer G2 changes from low level to high level, and a high level signal is input to the input terminal Cp of flip-flop FF2. But flipflop
Since a low level signal is input to the input terminal D of FF2, the set output Q of flip-flop FF2 remains at low level, so the coil 4 remains energized and the relay switch 6 is turned off. maintain condition. This is the second mode of operation mentioned above.

As described above, by operating the fuselage switch 10, it is possible to control the lighting and extinguishing of the lamp 11 as described in the first and second operation modes. Further, as described in the third and fourth operation modes, the input signal detection circuit 1 can control the lighting and extinguishing of the lamp 11 only when the fuselage switch 10 is in the conductive state.

FIG. 2 is an electrical circuit diagram of another embodiment of the present invention, and parts corresponding to the embodiment of FIG. 1 are given the same reference numerals. In this embodiment, the flip-flop
The set output Q of FF2 is applied to the reset terminal R of flip-flop FF1 via capacitor C3. Reset terminal R is grounded via resistor R7. Even in this case, the same operation as the embodiment shown in FIG. 1 can be achieved.

In the above embodiment, when the relay 5 is OFF, that is, the relay switch 6 is cut off, and the fuselage switch 10 is conductive,
The set output Q of flip-flop FF1 is at a high level, and the input D of flip-flop FF2 is also at a high level. If an instantaneous power outage (including instantaneous voltage fluctuations) occurs in this state, the flip-flop will
The input D of FF2 and the discrimination potential V change. In this case, the power supply of input D of flip-flop FF2,
Since it is different from the power source of the discrimination potential V, the time constant is different. If the specific number of discrimination potentials V is smaller than the time constant of the input D, the time taken for the input D to go from high level to low level when the power is restored after a momentary power outage is longer than the time required for input Cp to go from high level to low level. Since the time is longer than the time required to reach the level, the relay 6 changes from the OFF state to the ON state, causing a malfunction. That is, flip-flop FF2
Since input D becomes high level and input Cp changes from high level → low level → high level,
The same operation as when operating the fuselage switch 10 is performed. Such instantaneous power outages and instantaneous voltage fluctuations can easily occur on a daily basis, and it is necessary to take measures against them.

An embodiment that deals with instantaneous power outages and instantaneous voltage fluctuations as described above will be described with reference to FIG. A transistor Tr1 is connected to a line 17 connected to a constant voltage source 16. A line 18 including a Zener diode ZD is connected between the gate of this transistor Tr1 and the line 17. Line 18 and line 1 are closer to the connection point with line 17 than the Zener diode ZD in line 18.
A resistor R8 is interposed between the line 18 and the line 18, and a capacitor C3 connected to the line 18 is grounded. Line 1 for inputting the set output Q of flip-flop FF1 to the input terminal D of flip-flop FF2.
A transistor Tr2 is connected to the middle of 9, and this transistor Tr2 is connected to the transistor Tr1.
Cuts off when conducts.

When the supply voltage Vcc from the constant voltage source 16 is equal to or higher than a predetermined voltage, the transistor Tr
1 is conducting and accordingly the transistor
Tr2 is blocked. Therefore, input D of flip-flop FF2 operates in the same manner as in the embodiments of FIGS. 1 and 2.

Here, when the supply voltage Vcc becomes lower than the specified voltage due to an instantaneous power failure or an instantaneous voltage fluctuation while the relay 6 is in the OFF state, the transistor Tr1 is cut off and the transistor Tr2 is made conductive accordingly. Therefore, the input D of the flip-flop FF2 changes from high level to low level, and even if the input Cp of the flip-flop FF2 changes from high level to low level to high level, the set output Q of flip-flop FF2 remains at low level. Therefore, the relay 6 is prevented from malfunctioning due to instantaneous power outages or instantaneous voltage fluctuations.

The capacitor C3 is used to keep the input D of the flip-flop FF2 at a low level even in an unstable state when the power is turned on.

Although the above-mentioned embodiment has been described using the lamp 11 as the load, other devices may be used as the load.

As described above, according to the present invention, the relay switch is made conductive or disconnected by determining whether the fuselage switch is conductive or disconnected, so even if there is no transmitter at hand or the transmitter is lost, the fuselage The switch enables the relay switch to be operated.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of an embodiment of the present invention;
The figure is an electric circuit diagram of another embodiment of the present invention, and FIG. 3 is an electric circuit diagram of another embodiment of the present invention. 3, 4...Coil, 5...Relay, 6...Relay switch, 10...Aircraft switch, RA, RB,
RC...Resistor, C1...Capacitor, d1...Diode, FF1, FF2...Flip-flop.

Claims (1)

[Scope of Claims] 1. In a load control device that operates a load by driving a relay in response to a signal transmitted by remote control and changing conduction and cutoff of the relay switch, (a) a means for connecting a load and an airframe switch attached to the load and determining whether the airframe switch is conductive or disconnected; (b) when the relay switch is turned on, drive the relay to make the relay switch conductive, and then keep the relay switch conductive even if the aircraft switch is turned off; (b) when the relay switch is turned on, then; A load control device comprising: means for maintaining a conductive state of a relay switch even if a fuselage switch is cut off.