JPS5956323A - Display unit for remote control switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device in which indicator lights are provided on both the operating side and the operated side of a remote control switch.

The remote control switch generally uses a display device at the operating end to confirm whether the operated load end has operated as instructed. A conventional example of a remote control switch having such a display device is shown in FIG. In FIG. 1, the remote control switch is composed of a load end l to be operated and an operating end 19 for operating the load end l.

The load end 1 includes a single-phase full-wave rectifier circuit consisting of four diodes 2, 3, and 4.5, with one of the AC terminals open as the first terminal 6 and the second terminal 7, and the rectifier circuit. A coil 9 connected to the DC terminal operates a keep relay to open and close the main switch 8, a capacitor lO connected in parallel to this coil 9, and a capacitor 10 connected to the main switch 8 to connect the first terminal 6 and the second terminal. an auxiliary switch 11 which uses the terminal 7 of the terminal 7 as a switched contact and connects a switching contact to one of the terminals;
A power supply terminal 12 led out from the switching contact side of the rectifier circuit, and an operation terminal 13 led out from the other AC side terminal of the rectifier circuit. The keep relay is a relay that is opened and closed by passing an instantaneous current through the coil 9, and is mechanically held in an open position or a closed position each time.

The operating end 19 has a power terminal 20 and an operating terminal 2.
1, a power terminal 20 and an operation terminal 21
A normally open valve switch 16 and a circuit in which a closed circuit indicator light 17 and an open circuit indicator light 18 with directionality, such as light emitting diodes, are connected in antiparallel are connected in parallel and inserted between them. has been done. A plurality of operating terminals 19 can be provided, and each power terminal 20 thereof is commonly connected to a power line 15 connected to the power terminal 12 of the load end l via a power transformer 14, and each operating terminal 21 is connected to the power supply terminal 12 of the load end l. The contact point of the operating wire 151 connected to the operating terminal 13 of 1 is in contact with the first terminal 6 side as shown by the solid line; (in the direction of the solid line arrow) and excites the coil 9. Therefore, the keep relay operates to close the main switch 8. 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, the current in the direction of the solid arrow is cut off, and a new connection is made between the transformer 14 - pushbutton switch 16 - diode 3 - coil. Current flows in the direction of 9-diode 5-auxiliary switching device 11 (in the direction of the dotted arrow).At this time, the capacitor 10 smoothes the pulsating current with a half-waveform rectified by the diode, and the charge accumulated in the capacitor 1O is Since the current flows in the coil 9, the current in the coil 9 continues in the same direction.Therefore, while the current in the direction of the solid line arrow switches to the current in the direction of the dotted line, the current in the coil 9 continues to flow, and the keep relay remains in that state. If the pushbutton switch 16 is opened, the current in the direction of the dotted arrow flows to the closed circuit indicator light 17, and the closed circuit indicator light 1
7 lights up to indicate that the main switch 8 has been turned on. If the impedance of the indicator light 17 is made very high compared to that of the coil 9, when the number of indicator lights 17 is small, this current will be small and will not affect the operation of the keep relay. Further, even if this state continues for a long time, there is no risk that the coil 9 will overheat. Next, when the pushbutton switch 16 is closed again, the switching contact of the auxiliary switching device 11 is in contact with the second terminal 7 side as shown by the dotted line, so the current from the transformer 14 flows in the direction of the dotted arrow. The flow coil 9 is energized. Therefore, the keep relay operates to open the main switch 8. At this time, the switching point of the auxiliary switching device 11 is simultaneously switched to the first terminal 6 side as shown by the solid line, so 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 electromagnetic coil 9
Since the current continues due to the charge stored in the capacitor lO as described above, the keep relay does not operate unnecessarily. When the pushbutton switch 16 is opened, a current in the direction of the solid arrow flows to the open circuit indicator light 18, which lights up to indicate that the main switch 8 has been opened. In this case as well, if the impedance of the indicator lamps 18 is made very high, if the number of one indicator lamp 18 is small, this current will be small and will not affect the operation of the keep relay. Also, there is no risk of the electromagnetic coil 9 overheating.

In this way, in the conventional remote control switch, the main switch provided at the load end is opened and closed via the coil by the switch provided at the operating end.
At this time, a current in the same direction as the current flowing through the coil ζ rectified by the diode is passed through an indicator light at the operating end, so that the open/closed state of the main switch can be confirmed at the operating end. At this time, the load end is normally installed close to the load, so if the load status can be visually confirmed, such as a lighting load, the above configuration will not pose a problem, but if the operating status of the load is invisible, then In some cases, the load end is located far away from the actual load, and the operating status of the load cannot be confirmed from the load end. In such cases, the conventional practice is to use a load end with a mechanical indicator that operates in conjunction with the opening and closing of the main switch. However, the mechanical display type is only minutes! In dark places such as on a board, the display may not be clearly distinguishable.

The present invention has been made in view of the above points.

It is an object of the present invention to provide a remote control switch equipped with an indicator light at the load end as well as at the operating end.

This purpose is to operate the load end by providing a load end with a coil for opening and closing the main switch, a diode for determining the direction of current flowing through this coil, and an indicator light that lights up when the current flows in one direction. In a display device for a remote control switch, the remote control switch comprises an operating end and is configured to flow a current in the same direction as the current flowing through the diodes to the indicator light to indicate whether the main switch is open or closed, in which only one direction is connected in parallel with each of the diodes. This is accomplished by connecting another indicator light that lights up with a current of .

Next, embodiments of the present invention will be described in detail with reference to the drawings. Figure 2 is an example of a circuit equipped with a light-emitting display device at the load end of a remote control switch that is exactly the same as Figure 1. Explanation of the same parts as in Figure 1 will be omitted, and only the different parts will be explained. An open circuit indicator light 26 made of a light emitting diode is connected in parallel with the diode 2 of the load end 1, and a closed circuit indicator light 25 also made of a light emitting diode is connected in parallel with the diode 5. Therefore, the operation of this circuit as a remote control switch is exactly the same as the circuit shown in FIG. 1, so I will omit it and only describe the operation as a display device. In FIG. When the auxiliary switching device 11 contacts the second terminal 7 side as shown by the dotted line, the current flowing through the coil 9 flows through the diode 5 and the indicator light 17 as shown by the dotted line. Therefore, a part of the light also flows to the roaring indicator light 25, causing the indicator light 25 to emit light. In other words, both indicator lights 17,25 indicate that the main switch 8 is closed. Also, the main switch 8 is opened and the final auxiliary switch 11 is switched to the first switch as shown by the solid line.
when it is in contact with the terminal 6 side.

The current flowing through the coil 9 flows through the diode 2 and the indicator light 18 as shown by the solid line. Therefore, a portion of the emitted light also flows to the roaring indicator light 26, causing the indicator light 26 to emit light. In other words, the indicator lights 18, 26 both indicate that the main switch 8 is open. In this way, in this circuit, the open/closed state of the main switch can be confirmed even at the load end using the light-emitting display device.

Furthermore, both indicator lights 25, 26 may be connected in parallel with diodes 3.4, respectively. It is convenient to distinguish whether the main switch is open or closed by using different light emitting diodes that emit light of different colors.

FIG. 3 is a wiring diagram showing another embodiment. In FIG. 3, the load end l includes a main switch 8, an auxiliary switch 11 linked to the main switch 8, a keep relay having a coil 9, two diodes that determine the direction of the excitation current of the coil 9, and a light emitting diode. Two indicator lights consisting of 25.
It is equipped with 26. One end of the coil 9 is connected to the power line 15 via the power transformer 14, and the other end is connected to the anode side of the diode 2 and the indicator light 26, which are connected in parallel with each other.
The diode 5 and the cathode side of the indicator lamp 25, which are connected in parallel with each other, are commonly connected, and the cathode side of the diode 2 and the anode side of the diode 5 are respectively connected to the switched contacts of the auxiliary switch 11. Further, this switching contact is connected to an operating line 151. The operation terminal 19 is connected to the operation terminal 21 by commonly connecting the anode of the diode 27 and the cathode of the diode 28, and the cathode of the diode 27 and the anode of the diode 28 are respectively connected to the switching contacts of the three-point changeover switch 29. The switching contact 9- of the three-point switch 29 is connected to the power terminal 20. A closed-circuit indicator light 17 and an open-circuit indicator light 18 made of light emitting diodes are connected in antiparallel to each other and connected between both terminals 20 and 21. A plurality of these operating ends 19 can be provided, and both terminals 20 and 21 are connected to the power line 15 and the operating line 1, respectively.
51.

When the three-point changeover switch 29 of the operating end 19 is turned to the diode 27 side, the diode 27 - switch 29 - transformer 514 -
Coil 9 - Diode 2 and indicator light '26 - Auxiliary switch 1
Current flows in the direction of 1 (in the direction of the solid arrow) and the main switch 8 closes. At this time, the auxiliary switch 11 is switched to the diode 5 and indicator light 25 side. Then, the current flowing in the direction of the solid line arrow is cut off, and the current flows in the direction of the diode 5, the indicator light 25, the coil 9, the transformer 14, the switch 29, and the auxiliary switching device 11 (in the direction of the dotted line arrow). At this time, when the three-point changeover switch 29 is returned to the intermediate position, this current flows to the indicator lamp 17. In other words, the current in the direction of the dotted arrow flows through the diode 5.
and indicator light 25 right and indicator light 10-l7, and both indicator lights 17 and 25 indicate that the main switch 8 is closed. In this case, the current in the coil 9 can be adjusted by making the resistance of the indicator light 17 sufficiently high.
The amount is small and does not affect the operation of the keep relay. Next, when the 3-point changeover switch 29 is turned to the diode 28 side, a current flows in the direction of the dotted arrow, opening the main switch 8. At the same time, the auxiliary changeover 11 is switched to the diode 2 side, so the 3-point changeover switch 29 is turned to the intermediate position. When put back, indicator light 1
8°26 lights up to indicate that the main switch 8 is open.

Generally, a diode has a low resistance in the positive direction near its rated current value, so even if high-resistance light-emitting diodes are connected in parallel, the current shunted to the light-emitting diodes is small. However, as in this circuit, when the diode is connected in series with another high-resistance light-emitting diode and the current of the diode becomes much smaller than the rated value, its resistance increases rapidly. has enough current flowing through it. In this example, the indicator light and 11
− We have described the case where a light emitting diode is connected, but
An indicator light with a diode and a light bulb connected in series can be used in circuits with high reverse voltages.

As described above, the present invention provides a light-emitting indicator light at the load end in addition to the operating end of a remote control switch, and when the load is not visible from the load end that operates the load, This is a convenient display device to use when it is difficult to confirm the operation from the outside.

[Brief explanation of the drawing]

FIG. 1 is a wiring diagram showing an example of a conventional remote control switch having a display device, and FIGS. 2 and 3 are wiring diagrams showing embodiments of the display device of the remote control switch according to the present invention. 1..., load end, 2, 3, 4.5... diode, 8
...Main switch, 9...Coil, 17.25...
Closed circuit indicator light. 18.26... Open circuit indicator light, 19... Operation end. Sai 1, Knocker 2, Evil 11

Claims (1)

[Claims] l) Consists of a load end that is equipped with a coil that opens and closes the main switch and a diode that determines the direction of current flowing through this coil, and an operating end that operates the load end that is equipped with an indicator light that lights up when current flows in only one direction. , in a display device for a remote control switch that displays whether the main switch is open or closed by passing a current in the same direction as the current flowing through the diodes through the indicator lamp, a current flowing in only one direction is provided in parallel with each of the diodes; A display device for a remote control switch, characterized in that it is connected to another indicator light that lights up.