JPS6212735B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control switch device that can operate a switching device for a power load such as a lighting device using low voltage signal communication wiring and display the operation results.

A so-called keep relay is used as a device for opening and closing a power load using signal communication wiring, which is operated by passing an instantaneous current through an electromagnetic coil and is mechanically held in the open or closed position each time. . Use this keep relay to
It is convenient to form a load switch as shown in the figure and operate and display it using a control device with a display circuit. In FIG. 1, the load switch 1 is a single-phase full-wave rectifier circuit consisting of four diodes 2, 3, 4, and 5, with one of the AC terminals open as a first terminal 6 and a second terminal 7. , an electromagnetic coil 9 that is connected to the DC terminal of this rectifier circuit and opens and closes the main switch 8 of the keep relay, a capacitor 10 that is connected in parallel to this electromagnetic coil 9, and one side of the rectifier circuit that operates in conjunction with this main switch 8. An auxiliary switch 11 which connects a switching contact to either of the first terminal 6 and the second terminal 7 as switching contacts, a power supply terminal 12 derived from the switching contact of the auxiliary switch 11, and a rectifier. Operation terminal 1 derived from the other AC side terminal of the circuit
3. The main switch 8 is used by being inserted into a closed loop circuit between a power source and a load (not shown). The control device 19 also has a power terminal 20 and an operation terminal 21.
0 and the operating terminal 21 are a normally open pushbutton switch 16, a directional closing indicator light 17 such as a light emitting diode, and an open circuit indicator light 18.
The circuit is inserted in parallel with the circuit which is anti-parallel. A plurality of control devices 19 can be provided, and each power terminal 20 is connected to the control power transformer 1.
4, and the respective operation terminals 21 are commonly connected to an operation line 15' connected to the operation terminal 13 of the load switch 1. ing. Both the power supply line 15 and the operation line 15' are so-called signal communication wiring.

In the circuit of FIG. 1, when the main switch 8 is open, the switching contact of the auxiliary switch 11 is connected to the first terminal 6 of the open rectifier circuit as shown by the solid line, so the push button When the switch 16 is closed, the current from the power transformer 14 is transferred to the transformer 14.
- Auxiliary switch 11 - Diode 2 - Electromagnetic coil 9
- Diode 4 - Flows in the direction of the push button switch 16 (in the direction of the solid line arrow) and closes the main switch 8. At the same time, the switching contact of the auxiliary switching device 11 is switched to the second terminal 7 as shown by the dotted line, the current in the direction of the solid arrow is cut off, and a new connection is made between the transformer 14 - push button switch 16 - diode 3 - electromagnetic coil. Current flows in the direction of 9-diode 5-auxiliary switch 11 (in the direction of the dotted arrow). At this time, the capacitor 10 smoothes the half-wave pulsating current rectified by the diode, and when the current flowing in the direction of the solid line arrow switches to the direction of the dotted line arrow, the charge charged in the capacitor 10 is transferred to the electromagnetic coil. 9, the current in the electromagnetic coil 9 continues in the same direction. The main switch 8 (keep relay contact) is thus maintained in its operating state. When the push button switch 16 is opened, a current flows in the direction of the dotted arrow to the indicator light 17, which lights up to indicate that the main switch 8 has been turned on.

Next, when the push button switch 16 is closed again,
Since the switching contact of the auxiliary switch 11 is connected to the second terminal 7 as shown by the dotted line, the current from the transformer 14 flows in the direction of the dotted arrow and the main switch 8
At this time, the switching contact of the auxiliary switching device 11 is also switched to the first terminal 6 side as shown by the solid line, the current in the direction of the dotted arrow is cut off, and the current in the direction of the solid arrow flows. At this time, the current of the electromagnetic coil 9 is
This is continued by the charge stored in capacitor 10 as already mentioned. When the push button switch 16 is opened, a current in the direction of the solid arrow flows to the indicator light 18, which lights up to indicate that the main switch 8 has been opened.

This remote control switch device can be operated from various locations by several remotely located control devices via simple signal communication wiring, and the results can be displayed. However, this remote control switch device does not allow
For example, even when the load switch has finished opening and closing the load, the display circuit will not light up because it is short-circuited by the push button switch. Another drawback is that the control current continues to flow through the electromagnetic coil while the push button switch is closed.

As a remote control switch device which eliminates the above-mentioned drawbacks, a device having a circuit as shown in FIG. 2 is known.
In FIG. 2, the control device 19 has a power supply terminal 20 and an operation terminal 21, and between the two terminals 20 and 21, diodes 24 and 25 connected with mutually opposite polarities are connected with an automatic return type and a switching type. They are connected so that they can be switched alternately by a push button switch 23. The power terminal 20 is connected via the power transformer 14 to a power line 15 connected to the power terminal 12 of the load switch 1, which has the same connection as shown in FIG. 1, and the operating terminal 21 is connected to the operating terminal 13. is connected to the operating line 15'.

In the circuit shown in FIG. 2, when the main switch 8 is open, the switching contact of the auxiliary switch 11 is connected to the first terminal 6 side as shown by the solid line, so the push button switch 23 is connected to the diode 24 side. When closed, current from the power transformer 14 flows from the power terminal 12 to the electromagnetic coil 9 via the first terminal 6 as shown by the solid arrow. Therefore, the main switch 8 is closed. At the same time, the switching contact of the auxiliary switching device 11 is switched to the second terminal 7 side as shown by the dotted line, and the current in the direction of the solid arrow is cut off. Of course, since the current flowing through the diode 24 is only in the direction of the solid arrow, no current flows through the electromagnetic coil 9 even if the push button switch 23 remains closed to the diode 24 side. Next, when the push button switch 23 is switched to the diode 24 side, the current from the power transformer 14 flows from the operation terminal 13 to the electromagnetic coil 9 via the diode 3 as shown by the dotted arrow, and the main switch 8 is opened. At the same time, the switching contact of the auxiliary switching device 11 is switched to the second terminal 6 side as shown by the solid line, and the current in the direction of the dotted arrow is cut off. Of course, since the current flowing through the diode 25 is only in the direction of the dotted arrow, no current flows through the electromagnetic coil 9 even if the push button switch 23 remains closed to the diode 25 side.

In the switch device of the circuit shown in FIG. 2, whether the push button switch 23 is closed to the diode 24 side or the diode 25 side, the contact of the push button switch 23 will automatically open when the push button is released. However, the current in the electromagnetic coil 9 is already cut off before the push button switch 23 is opened, thus achieving the intended purpose of no current flow. However, this remote control switch device
There is a drawback that the opening and closing of the load switch cannot be displayed on the control device side.

The present invention eliminates the above-mentioned drawbacks and provides a remote control switch device in which the indicator lamp lights up even if the push button switch remains closed after the load switch is operated, and no control current flows through the electromagnetic coil. The purpose is to

This purpose consists of a single-phase full-wave rectifier circuit with one of the AC terminals open, an electromagnetic coil connected to the DC terminal of the rectifier circuit that controls opening and closing by keeping the load, and a single-phase full-wave rectifier circuit connected in parallel to the electromagnetic coil. A load switch including a capacitor and an auxiliary switch that operates in conjunction with the opening/closing control and switches the current supply to either of the two opened AC terminals is controlled by a push button switch and a display circuit. The control device is connected in parallel to a push-button switch circuit connected to alternately switch diodes connected in opposite polarity to each other, in the device operated through a power transformer. This is achieved by constructing two directional indicator lights and a display circuit connected in antiparallel to each other.

Next, the present invention will be explained in detail based on drawings showing examples. In FIG. 3, the load switch 1 is
A single-phase full-wave rectifier circuit consisting of diodes 2, 3, 4, and 5 and having one of the AC terminals open as a first terminal 6 and a second terminal 7, exactly the same as the circuit shown in FIG. An electromagnetic coil 9 that opens and closes the main switch 8 of the keep relay connected to the DC terminal of this rectifier circuit, a capacitor 10 that is connected in parallel to this electromagnetic coil 9, and an electromagnetic coil 9 that opens and closes the main switch 8 of the keep relay connected to the DC terminal of this rectifier circuit. an auxiliary switching device 11 that connects a switching contact to either of the first terminal 6 and the second terminal 7, which are connected to each other, as switching contacts;
A power terminal 12 led out from the switching contact of the switch, and an operation terminal 1 led out from the other AC terminal of the rectifier circuit.
3. The main switch 8 is used by being inserted into a closed loop circuit between a power source and a load (not shown). The control device 19 has a power supply terminal 20 and an operation terminal 21.
Two diodes 24 and 25 are connected between 0 and 21 with opposite polarities, and are connected to be alternately switched by an automatic return type changeover type push button switch 23. Also, both terminals 20 and 21
A circuit in which a directional closing light 27 and an open circuit are connected in antiparallel is connected between them. Control device 1
A plurality of 9 can be provided, and each power terminal 20 is commonly connected to the power line 15 connected to the power terminal 12 of the load switch 1 via the control power transformer 14, and each operation terminal 21 is Operation line 1 connected to operation terminal 13 of load switch 1
5' are commonly connected. . Both the power supply line 15 and the operation line 15' are signal communication wiring.

When main switch 8 is open, auxiliary switch 1
Since the switching contact 1 is connected to the first terminal 6 of the open rectifier circuit as shown by the solid line, when the push button switch 23 is pressed and closed to the diode 24 side (on side), the power transformer 14 is connected to the first terminal 6 of the rectifier circuit. The current of transformer 14 - auxiliary switch 11 - diode 2
- Electromagnetic coil 9 - Diode 4 - Diode 24
- Flows in the direction of the push button switch 23 (in the direction of the solid line arrow) and closes the main switch 8. At the same time, the switching contact of the auxiliary switching device 11 is switched to the second terminal 7 as shown by the dotted line, the current in the direction of the solid arrow is cut off, and the current of the push button switch 23, that is, the control current is cut off. And a new transformer 14-
Current flows in the direction of indicator light 27 - diode 3 - electromagnetic coil 9 - diode 5 - auxiliary switch 11, and indicator light 27 lights up. That is, when the push button switch 23 is pressed and closed to the diode 24 side, the indicator light 27 lights up to indicate that the main switch 8 is closed. The push button switch 23 is
It will automatically return when the pressure is released.

When the main switch 8 is closed, the auxiliary switch 11
Since the switching contact of is connected to the second terminal 7 as shown by the dotted line, the push button switch 2 is connected to the second terminal 7 as shown by the dotted line.
3 to the open circuit side on the diode 25 side, the current from the transformer 14 flows in the direction of the transformer 14 - push button switch 23 - diode 25 - diode 3 - electromagnetic coil 9 - diode 5 - auxiliary switch 11 (in the direction of the dotted arrow). direction) and opens the main switch 8.
At the same time, the auxiliary switch 11 is also switched to the first terminal 6 side as shown by the solid line, the current in the direction of the dotted arrow is cut off, and the current of the push button switch 23, that is, the control current is cut off. And a new transformer 1
Current flows in the direction of 4-auxiliary switch 11-diode 2-electromagnetic coil 9-diode 4-indicator lamp 28, and indicator lamp 28 lights up. That is, at this time as well, with the push button switch 23 closed to the diode 25 side, the indicator light 28 lights up and the main switch 8
indicates that it has been opened. The push button switch 23 automatically returns to its original state when the push button switch 23 is released.

In the remote control switch device according to the present invention, the capacitor 10 carries the half-wave pulsating current rectified by the diodes 2, 3, 4, and 5 from the time the current starts flowing through the electromagnetic coil 9 until the main switch 8 operates. It serves to smooth the surface, but in this case, the first
As in the conventional switch device shown in the figure, the current in the electromagnetic coil 9 is switched by the auxiliary switching device 11, but since the current sufficient to operate the electromagnetic coil 9 does not flow, the current is switched at the time of this switching. They are not given any major role to keep it going. Furthermore, as already mentioned, this device can be operated and displayed from other locations by connecting several control devices in parallel. At this time, the current of the indicator light flows through the electromagnetic coil, but since the impedance of the indicator light is much higher than that of the electromagnetic coil, if the number of indicator lights is small, this current is small and does not interfere with the operation of the main switch. Furthermore, even if this state continues, there is no risk of the electromagnetic coil overheating. The push-button switch used in this device is of an automatic return type, so there is no risk of the push-button switch being kept pressed to one side, but if the push-button switch of one control device is kept closed, for example, to the closing side. If the push button switch of another control device is closed to the open side, the main switch 8 will continue to open and close alternately, but in this case,
Since both indicator lights flash alternately, each control device can confirm this and take immediate action. Therefore, it is possible to install a plurality of control devices at appropriate locations that do not affect the operation of the electromagnetic coil, and perform remote control from those locations.

As described above, the remote control switch device according to the present invention has a load switch that is combined with a single-phase full-wave rectifier circuit and an auxiliary switching device and an electromagnetic coil that controls the switching of the load, and an automatic return switch equipped with a display circuit. The control device consists of a type changeover push button switch that is operated via a low control power source.It can be operated from multiple remote locations via simple signal communication wiring, and the load can be controlled even when the push button switch is closed. This is an excellent device that displays the open/close status of the switch, and furthermore, after the load switch has opened/closed, the control current of the electromagnetic coil is cut off, leaving only the indicator light current.

[Brief explanation of the drawing]

1 and 2 are wiring diagrams of a conventional remote control switch device, respectively, and FIG. 3 is a wiring diagram of a remote control switch device according to the present invention. DESCRIPTION OF SYMBOLS 1... Load switch, 2, 3, 4, 5... Diode forming a single-phase full-wave rectifier circuit, 6... First terminal of the rectifier circuit, 7... Second terminal of the rectifier circuit, 9... Electromagnetic coil, 10... Capacitor, 11... Auxiliary switch,
14... Power transformer, 16, 23... Push button switch, 19... Control device, 24, 25... Diode of control device, 27, 28... Directional indicator light.

Claims (1)

[Claims] 1. A single-phase full-wave rectifier circuit with one of the AC terminals open, an electromagnetic coil connected to the DC terminal of the rectifier circuit to control opening and closing by keeping the load, and a capacitor connected in parallel to the electromagnetic coil. A load switch equipped with an auxiliary switch that operates in conjunction with the opening/closing control and switches the current supply to either of the two opened AC terminals is powered by a control device consisting of a push button switch and a display circuit. In the device operated via a transformer, the control device includes a push-button switch circuit connected to alternately switch diodes connected with opposite polarities, and a push-button switch circuit connected in parallel to the push-button switch circuit to control directionality. 1. A remote control switch device comprising a display circuit having two indicator lights connected in antiparallel to each other.