JP6384777B2 - Switch device and load control system - Google Patents

Description

  The present invention relates to a switch device and a load control system that controls a lighting load or the like using the switch device.

  2. Description of the Related Art Conventionally, a load control system that turns on and off energization of a load using a remote control relay has been provided (see, for example, Patent Document 1).

  The conventional example described in Patent Document 1 includes a latching type remote control relay, a remote control transformer, and a switch device. The remote control relay has a main contact, an auxiliary contact linked to the main contact, and a relay winding. The main contact is inserted into a power supply path from a commercial power supply to a load (for example, a lighting load). The relay winding is fed from a remote control transformer via an auxiliary contact. That is, the energization direction of the relay winding is switched according to the state of the auxiliary contact.

  The remote control transformer generates power (AC power) for driving the relay winding. The switch device has an operation unit that can be manually operated, and is configured to cause an exciting current to flow through the relay winding in accordance with an operation of the operation unit.

  Further, the switch device includes a first LED that is turned on when the lighting load is turned on, and a second LED that is turned on when the lighting load is turned off. These two LEDs are configured to light up with a current supplied from a remote control transformer via a relay winding and an auxiliary contact. That is, the two LEDs of the switch device individually display the state (on and off) of the main contact of the remote control relay.

JP 2002-110011 (see paragraphs 0002-0007 and FIGS. 34 and 35)

  Incidentally, in the conventional example described in Patent Document 1, the time from when the operation unit of the switch device is operated until the state of the illumination load is switched may be longer than usual for some reason. In such a case, the operator who operates the operation unit does not immediately switch the LED display of the switch device, and therefore determines that the operation unit has not been operated reliably and operates the operation unit again. there is a possibility. In this case, since the operation unit is operated twice, the state of the illumination load becomes a state opposite to the state intended by the operator (a state before the operation unit is operated).

  The present invention has been made in view of the above problems, and an object thereof is to suppress erroneous operations.

  The switch device of the present invention is a switch device that controls a remote control relay that opens and closes a power supply path from a power source to a load, and corresponds to the operation unit that receives an operation input and the operation input that the operation unit receives, A control unit that controls opening and closing of the remote control relay; and a display unit that displays a state of the remote control relay, the control unit after controlling the remote control relay from the open state to the closed state in response to the operation input The display unit is turned on, the remote control relay is controlled from the closed state to the open state in response to the operation input, the display unit is turned off, and the remote control relay is opened in response to the operation input. The display unit is configured to be in a switching display state during the period from the state to the closed state and from the closed state to the open state, and the display unit is in the on display state Characterized said off-display state, to be adapted to identifiably displayed and the switching display state.

Load control system of the present invention is characterized and the remote control relay for opening and closing the supply path from the power source to the load, to have a said switch device.

  The switch device and the load control system of the present invention have an effect that it is possible to suppress erroneous operations.

It is a block diagram which shows embodiment of the switch apparatus which concerns on this invention. It is a circuit block diagram of the electric power feeding part in the same as the above. It is an external appearance perspective view same as the above. It is an external appearance perspective view of the state which removed the operation handle same as the above. It is a timing chart for operation | movement description same as the above. It is a system configuration figure showing an embodiment of a load control system concerning the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a switch device according to the present invention and embodiments of a load control system according to the present invention will be described in detail with reference to the drawings. In addition, in this embodiment, although illumination load is illustrated as load, the kind of load is not limited to illumination load.

  As shown in FIG. 6, the load control system of the present embodiment includes a switch device 1 and three remote control relays 2 (2A, 2B, 2C). However, in the following description, the symbols “2A”, “2B”, and “2C” are assigned when distinguishing the three remote control relays, and the symbol “2” is assigned when the three remote control relays are not distinguished. ing. Similarly, the symbols “4A”, “4B”, and “4C” are assigned when the three illumination loads are distinguished, and the symbol “4” is assigned when the three illumination loads are not distinguished.

  The remote control relay 2 is well known in the art and comprises a main contact 20, a relay winding 21, an auxiliary contact 22, diodes 23 and 24, and the like. The main contact 20 is inserted into a power feeding path from the power source (AC power source 3) to the illumination load 4. A common terminal of the auxiliary contact 22 is connected to one end of the relay winding 21. The other end of the relay winding 21 is connected to one signal terminal.

  The anode of the diode 23 is connected to one switching terminal of the auxiliary contact 22, and the cathode of the diode 24 is connected to the other switching terminal of the auxiliary contact 22. The auxiliary contact 22 is configured to be interlocked with the main contact 20. For example, when the main contact 20 is in an open state (see FIG. 6), the common terminal is connected to the switching terminal on the diode 23 side, and the main contact 20 is closed. In the state, the common terminal is connected to the switching terminal on the diode 24 side. The cathode of the diode 23 and the anode of the diode 24 are connected to the other signal terminal. Although not shown, a series circuit (differential circuit) of a capacitor and a resistor is inserted between the anode and cathode of one diode 23.

  When a DC voltage is applied between the signal terminals, the excitation current flows through the path of one signal terminal → relay winding 21 → auxiliary contact 22 → diode 23 → the other signal terminal, so the main contact 20 is closed from the open state. Switch to the state (turn on). When the main contact 20 is turned on, the auxiliary contact 22 is switched to the diode 24 side in conjunction with the main contact 20, so that no exciting current flows through the relay winding 21. However, since the remote control relay 2 is a latching type relay having a permanent magnet, the main contact 20 is maintained in the closed state even after the exciting current is stopped.

  Further, when a reverse DC voltage is applied between the signal terminals, an exciting current flows through the path of the other signal terminal → diode 24 → auxiliary contact 22 → relay winding 21 → one signal terminal. Switches from closed to open (turns off). When the main contact 20 is turned off, the auxiliary contact 22 is switched to the diode 23 side in conjunction with the main contact 20, so that no exciting current flows through the relay winding 21. However, the main contact 20 is maintained in the open state even after the exciting current is stopped.

  When the remote control relay 2 (the main contact 20 thereof) is turned on, AC power is supplied from the AC power source 3 to the lighting load 4 via the remote control relay 2, and the lighting load 4 is turned on (lights up). When the remote control relay 2 (the main contact 20 thereof) is turned off, AC power is not supplied from the AC power source 3 to the lighting load 4 via the remote control relay 2, and the lighting load 4 is turned off (extinguished). However, in the load control system of the present embodiment, switches 5A, 5B, and 5C are inserted in the respective power supply paths from the AC power supply 3 to the lighting loads 4A, 4B, and 4C in addition to the remote control relays 2A, 2B, and 2C. . These switches 5A, 5B, and 5C are wall switches embedded in a wall, for example, and are configured to open and close a contact each time an operation handle (not shown) is operated. That is, when the remote control relay 2 is in the on state, the lighting loads 4A, 4B, and 4C are individually turned on and off by operating the switches 5A, 5B, and 5C. Further, when the contacts of the switches 5A, 5B, and 5C are closed, the illumination load 4 is turned on / off according to the on / off of the remote control relay 2.

  Next, the switch device 1 of the present embodiment will be described.

  As illustrated in FIG. 1, the switch device 1 according to the present embodiment includes a control unit 10, an operation unit 11, a power feeding unit 12, a power supply unit 15, a constant voltage circuit 16, a display unit 17, and the like.

  The control unit 10 is preferably composed of a microcontroller (for example, PIC16F1503 manufactured by Microchip Technology Inc.) and a program executed by the microcontroller.

  The power supply unit 15 is configured to convert AC power (for example, AC power having an effective value of 100 to 120 volts) supplied from the AC power source 3 into DC power (for example, DC power of 24 volts). Such a power supply unit 15 is realized by, for example, an insulating switching power supply circuit that is conventionally known.

  The constant voltage circuit 16 is configured to step down and stabilize the output voltage (24 volt DC voltage) of the power supply unit 15 to a low voltage (for example, 5 volt) DC voltage. Such a constant voltage circuit 16 is realized by, for example, a conventionally known step-down chopper circuit and a three-terminal regulator. In the following description, the output voltage of the constant voltage circuit 16 is referred to as a control voltage. The control voltage is input to a power supply terminal (not shown) of the control unit 10.

  The operation unit 11 includes a momentary type push button switch (not shown), a control voltage is applied to both ends, and one end on the high potential side is connected to one of the input ports of the control unit 10. That is, the input port of the control unit 10 is at a high level (control voltage) when the operation unit 11 is not operated, and is at a low level when the operation unit 11 is operated. Therefore, the control unit 10 receives an operation signal from the operation unit 11 when the input port becomes a low level.

  The display unit 17 includes, for example, a red light emitting diode (red LED) whose emission color is red and a green light emitting diode (green LED) whose emission color is green (not shown). The red LED has a cathode connected to one of the output ports of the control unit 10, and a control voltage is applied to the anode. Further, the green LED has a cathode connected to the other output port of the control unit 10, and a control voltage is applied to the anode. That is, the red LED and the green LED of the display unit 17 are individually turned on / off (lighted / extinguished) by the control unit 10.

  The power feeding unit 12 includes a polarity switching unit 13 and a trigger unit 14. As shown in FIG. 2, the polarity switching unit 13 is preferably composed of an H-bridge driver IC (for example, BD6231 manufactured by Rohm). The H bridge driver IC includes an H bridge circuit 130 including four field effect transistors, and a controller 131 that controls the H bridge circuit 130. The output voltage of the power supply unit 15 (24 volt DC voltage) is input to the H bridge circuit 130. Of the two output terminals 132 and 133 of the H-bridge circuit 130 (polarity switching unit 13), one output terminal 132 is connected to the signal terminal on the relay winding 21 side of the remote control relay 2, and the other output terminal 133 is a trigger. Connected to the unit 14. The controller 131 is configured to drive the H bridge circuit 130 in accordance with control signals output from the two output ports of the control unit 10. That is, when the control signal is output from one output port of the control unit 10, the controller 131 has a polarity (direction) at which the output terminal 133 on the side connected to the trigger unit 14 has a high potential, and the power supply unit 15. The H bridge circuit 130 is driven so as to apply the output voltage. In addition, when a control signal is output from the other output port of the control unit 10, the controller 131 has a polarity (orientation) at which the output terminal 132 connected to the remote control relay 2 has a high potential, and the power supply unit 15. The H bridge circuit 130 is driven so as to apply the output voltage.

  As shown in FIG. 2, the trigger unit 14 includes a plurality (three in the illustrated example) of phototriac couplers 14A, 14B, and 14C. Each of the phototriac couplers 14A, 14B, and 14C includes a light emitting element (LED) 140 and a phototriac 141. A control voltage is applied to the positive electrode (anode) of the light emitting element 140, and the negative electrode (cathode) of the light emitting element 140 is connected to each of three different output ports of the control unit 10. That is, in each phototriac coupler 14A, 14B, 14C, when each output port of the control unit 10 becomes a low level, the light emitting element 140 emits light, and the phototriac 141 is triggered and turned on. While the phototriac 141 is on, the excitation current can be supplied from the power supply unit 15 to the remote control relay 2 with the polarity (direction) switched by the polarity switching unit 13.

  Next, the appearance and structure of the switch device 1 will be described with reference to FIGS.

  The switch device 1 of the present embodiment is embedded in a construction material (for example, a wall) while being attached to the attachment frame 200.

  The mounting frame 200 is, for example, a wide handle type switch dedicated mounting frame standardized by Japanese Industrial Standards. A rectangular window hole (not shown) is opened at the center of the mounting frame 200, and the main body 100 of the switch device 1 is fitted into the window hole. Two sets of two fitting holes 201 are provided along the longitudinal direction on the left and right side walls of the window hole. In addition, attachment pieces 202 are provided on both upper and lower sides of the window hole. Each attachment piece 202 is provided with a long hole 203 through which a box screw is inserted, and circular screw insertion holes 204 are provided on both the left and right sides of the long hole 203. Such a mounting frame 200 is well known in the art, and is fixed to a switch box embedded in a wall with a box screw, or is fixed to a wall plate (such as a plaster board) using a clamp (not shown). Is done.

  The switch device 1 includes a main body 100 made of a synthetic resin molded body having a rectangular box shape, and an operation handle 110 that is swingably attached to the front surface of the main body 100. In the main body 100, a plurality of printed wiring boards (not shown), a plurality of quick connection terminals (screwless terminals), and the like are stored. Circuit components (such as a microcontroller and an H-bridge driver IC) constituting the control unit 10, the operation unit 11, the power feeding unit 12, and the like shown in FIGS. 1 and 2 are mounted on these printed wiring boards. Moreover, the display part 17 (red LED and green LED) is mounted in the left end part in the printed wiring board of the foremost row. Further, an operation unit 11 (push button switch) is mounted at the center of the printed wiring board in the front row.

  A rectangular window hole 101 passes through a portion of the front wall of the main body 100 that faces the display unit 17. That is, red and green light emitted from the display unit 17 is irradiated to the front of the main body 100 through the window hole 101.

  In addition, a T-shaped operation piece 102 is provided at a portion facing the operation unit 11 on the front wall of the main body 100 so as to be bent. That is, when the operation piece 102 is bent rearward, the operation unit 11 (push button switch) mounted on the frontmost printed wiring board is turned on by the operation piece 102.

  Further, a pair of shaft portions 103 are provided in the vertical direction at the left end of the front wall of the main body 100. These shaft portions 103 are formed in a cylindrical shape at the front end portion, and a bearing portion (not shown) of the operation handle 110 is rotatably attached.

  In addition, on the left and right side surfaces of the main body 100, claws 104 that fit into the fitting holes 201 of the mounting frame 200 are provided so as to be arranged at intervals in the vertical direction.

  As shown in FIG. 3, the operation handle 110 is formed in a vertically long rectangular plate shape from a synthetic resin material. The bearing portion is provided at the center of the left end of the rear surface of the operation handle 110. When the bearing portion is attached to the shaft portion 103, the operation handle 110 can swing with respect to the main body 100 with the shaft portion 103 as a fulcrum. That is, when the operation handle 110 is pushed from the front, it swings backward with the shaft portion 103 as a fulcrum, and the operation piece 102 of the main body 100 is bent rearward to turn on the operation portion 11.

  A rectangular window hole 111 is provided at the center of the left end of the operation handle 110. Further, a cover 112 made of a light-transmitting synthetic resin material (for example, acrylic resin) is fitted in the window hole 111. That is, the light emitted from the display unit 17 passes through the window hole 101 of the main body 100 and is then irradiated forward through the window hole 111 and the cover 112 of the operation handle 110.

  Next, the operation of the switch device 1 of this embodiment will be described with reference to the time chart of FIG. 5 and FIGS. In FIG. 5, the horizontal axis indicates time t and the vertical axis indicates voltage V. 5 indicates the output voltage of one output terminal 132 of the polarity switching unit 13, and B in FIG. 5 indicates the output voltage of the other output terminal 133 of the polarity switching unit 13. In FIG. 5, C, D, and E indicate the input voltages of the three phototriac couplers 14A, 14B, and 14C, respectively, and F, G, and H are applied between the signal terminals of the three remote control relays 2A, 2B, and 2C. Each signal voltage is shown.

  Here, it is assumed that all the switches 5 are turned on and all the remote control relays 2 are turned off. Therefore, in this state, all the lighting loads 4 are turned off. Moreover, in the switch apparatus 1, the control part 10 displays that all the illumination loads 4 are light-extinguished on the display part 17 by lighting only green LED.

  When the operation handle 110 is pushed in the state, the control unit 10 receives an operation signal from the operation unit 11. Upon receiving the operation signal, the control unit 10 controls the polarity switching unit 13 to switch the polarity so that the output terminal 132 has a positive polarity and the output terminal 133 has a negative polarity (t = t0). Subsequently, the control unit 10 sets the input terminal of the phototriac coupler 14A to a low level, thereby causing a signal voltage (24 volt DC voltage) with the relay winding 21 side to be positive between the signal terminals of the remote control relay 2A. Is applied (t = t1).

  In the remote control relay 2A, an excitation current flows through the relay winding 21 by applying the signal voltage, so that the main contact 20 is turned on and the auxiliary contact 22 is switched to the diode 24 side. When the remote control relay 2A (the main contact 20 thereof) is turned on, AC power is supplied from the AC power source 3 to the lighting load 4A via the remote control relay 2A, and the lighting load 4A is turned on. When the auxiliary contact 22 of the remote control relay 2A is switched to the diode 24 side, the excitation current does not flow, so the phototriac 141 of the phototriac coupler 14A is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2A (see FIG. 5F).

  After the remote control relay 2A is turned on, the control unit 10 sets the input terminal of the phototriac coupler 14B to a low level, thereby causing a signal voltage (24) between the signal terminals of the remote control relay 2B to be positive on the relay winding 21 side. (DC voltage of volt) is applied (t = t2).

  In the remote control relay 2B, when the signal voltage is applied, an exciting current flows through the relay winding 21, so that the main contact 20 is turned on and the auxiliary contact 22 is switched to the diode 24 side. When the remote control relay 2B (the main contact 20 thereof) is turned on, AC power is supplied from the AC power source 3 to the lighting load 4B via the remote control relay 2B, and the lighting load 4B is turned on. When the auxiliary contact 22 of the remote control relay 2B is switched to the diode 24 side, the exciting current stops flowing, so that the phototriac 141 of the phototriac coupler 14B is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2B as well as the remote control relay 2A (see FIG. 5G).

  After the remote control relay 2B is turned on, the control unit 10 sets the input terminal of the phototriac coupler 14C to a low level, thereby causing a signal voltage (24) between the signal terminals of the remote control relay 2C to be positive on the relay winding 21 side. (DC voltage of volt) is applied (t = t3).

  In the remote control relay 2C, an excitation current flows through the relay winding 21 by applying the signal voltage, so that the main contact 20 is turned on and the auxiliary contact 22 is switched to the diode 24 side. When the remote control relay 2C (the main contact 20 thereof) is turned on, AC power is supplied from the AC power source 3 to the lighting load 4C via the remote control relay 2C, and the lighting load 4C is turned on. When the auxiliary contact 22 of the remote control relay 2C is switched to the diode 24 side, the exciting current stops flowing, so that the phototriac 141 of the phototriac coupler 14C is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2C as well as the remote control relays 2A and 2B (see FIG. 5H).

  Furthermore, after all the remote control relays 2 are turned on, the control unit 10 controls the polarity switching unit 13 to set the output terminals 132 and 133 to the same potential (t = t4). In addition, the control part 10 displays on the display part 17 that all the illumination loads 4 were lighted by lighting only red LED.

  When the operation handle 110 is pushed while all the lighting loads 4 are lit, the control unit 10 receives an operation signal from the operation unit 11. Upon receiving the operation signal, the control unit 10 controls the polarity switching unit 13 to switch the polarity so that the output terminal 133 has a positive polarity and the output terminal 132 has a negative polarity (t = t5). Subsequently, the control unit 10 sets the input terminal of the phototriac coupler 14A to a low level, thereby causing a signal voltage (24 volt DC voltage) that makes the relay winding 21 side negative between the signal terminals of the remote control relay 2A. Is applied (t = t6).

  In the remote control relay 2A, an excitation current in the reverse direction flows through the relay winding 21 when the signal voltage is applied, so the main contact 20 is turned off and the auxiliary contact 22 is switched to the diode 23 side. When the remote control relay 2A (the main contact 20 thereof) is turned off, AC power is no longer supplied from the AC power source 3 to the illumination load 4A, and the illumination load 4A is turned off. When the auxiliary contact 22 of the remote control relay 2A is switched to the diode 23 side, the excitation current does not flow, so the phototriac 141 of the phototriac coupler 14A is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2A (see FIG. 5F).

  After turning off the remote control relay 2A, the control unit 10 sets the input terminal of the phototriac coupler 14B to a low level, thereby setting a signal voltage (24 that makes the relay winding 21 side negative between the signal terminals of the remote control relay 2B. Volt DC voltage) is applied (t = t7).

  In the remote control relay 2B, when the signal voltage is applied, a reverse excitation current flows through the relay winding 21, so that the main contact 20 is turned off and the auxiliary contact 22 is switched to the diode 23 side. When the remote control relay 2B (the main contact 20 thereof) is turned off, AC power is no longer supplied from the AC power source 3 to the lighting load 4B, and the lighting load 4B is turned off. Note that when the auxiliary contact 22 of the remote control relay 2B is switched to the diode 23 side, the exciting current stops flowing, so that the phototriac 141 of the phototriac coupler 14B is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2B as well as the remote control relay 2A (see FIG. 5G).

  After turning off the remote control relay 2B, the control unit 10 sets the input terminal of the phototriac coupler 14C to a low level, thereby causing a signal voltage (24) between the signal terminals of the remote control relay 2C to be negative on the relay winding 21 side. (DC voltage of volts) is applied (t = t8).

  In the remote control relay 2C, when the signal voltage is applied, a reverse excitation current flows through the relay winding 21, so that the main contact 20 is turned off and the auxiliary contact 22 is switched to the diode 23 side. When the remote control relay 2C (the main contact 20 thereof) is turned off, AC power is no longer supplied from the AC power source 3 to the illumination load 4C, and the illumination load 4C is turned off. Note that when the auxiliary contact 22 of the remote control relay 2C is switched to the diode 23 side, the exciting current stops flowing, so that the phototriac 141 of the phototriac coupler 14C is turned off. That is, the control unit 10 applies a pulsed signal voltage to the remote control relay 2C as well as the remote control relays 2A and 2B (see FIG. 5H).

  Furthermore, after all the remote control relays 2 are turned off, the control unit 10 controls the polarity switching unit 13 to set the output terminals 132 and 133 to the same potential (t = t9). In addition, the control part 10 displays on the display part 17 that all the illumination loads 4 were light-extinguished by lighting only green LED.

  Here, in the switch device 1 according to the present embodiment, a relatively long time (t = t0 to t0) from when the operation unit 11 is operated until the state (lit or extinguished) of all the lighting loads 4A, 4B, and 4C is switched. t4, t = t5 to t9) are required. Therefore, the operator who has operated the operation unit 11 determines that the operation unit 11 has not been reliably operated because the display on the display unit 17 of the switch device 1 does not immediately switch, and operates the operation unit 11 again. There is a possibility that.

  Therefore, in the switch device 1 of the present embodiment, the control unit 10 is in a period (hereinafter referred to as a switching period) from when the operation unit 11 is operated until the main contacts 20 of all the remote control relays 2A, 2B, and 2C are switched. Is configured to put the display unit 17 in a switching display state.

  The switching display state is a state where both the red LED and the green LED of the display unit 17 are lit, for example. Or the state which at least any one of red LED of the display part 17 and green LED blinks by a fixed period may be sufficient. However, the switching display state of the display unit 17 is not limited to the above-described state.

  In the switching period, the control unit 10 sets the display unit 17 to the switching display state. When the switching period ends, the control unit 10 switches the display unit 17 to the on display state (the red LED is turned on) or the off display state (the green LED is turned on). Configured to transition to a state).

  As described above, the switch device 1 of the present embodiment is a switch device that controls the remote control relay 2 that opens and closes the power supply path from the power source (AC power source 3) to the load (lighting load 4). The switch device 1 according to the present embodiment includes an operation unit 11 that receives an operation input, a control unit 10 that controls opening and closing of the remote control relay 2 in response to the operation input received by the operation unit 11, and states of the remote control relay 2. And a display unit 17 for displaying. The control unit 10 controls the remote control relay 2 from the open state to the closed state in response to the operation input, and then turns the display unit 17 on and displays the remote control relay 2 from the closed state to the open state in response to the operation input. After the control, the display unit 17 is configured to be in an off display state. Further, the control unit 10 sets the display unit 17 to the switching display state until the remote control relay 2 is switched from the open state to the closed state and from the closed state to the open state in response to the operation input (switching period). Composed. The display unit 17 is configured to display the on display state (a state where the red LED is lit), the off display state (a state where the green LED is lit), and the switching display state in an identifiable manner.

  Further, the load control system of the present embodiment includes a remote control relay 2 that opens and closes a power feeding path from a power source (AC power source 3) to a load (lighting load 4), and a switch device 1.

  As described above, since the display unit 17 of the switch device 1 displays the switching display state so as to be distinguishable from the on display state and the off display state in addition to the on display state and the off display state, an erroneous operation of the operation unit 11 by the operator is performed. Can be suppressed.

1 Switch device 2 Remote control relay 3 AC power supply
4 Lighting load (load)
10 control unit 11 operation unit 17 display unit

Claims (3)

A switch device for controlling a remote control relay that opens and closes a power supply path from a power source to a load,
An operation unit that receives an operation input, a control unit that controls opening and closing of the remote control relay in response to the operation input received by the operation unit, and a display unit that displays a state of the remote control relay,
The control unit controls the remote control relay from the open state to the closed state corresponding to the operation input, and then turns the display unit on display state, and responds to the operation input from the closed state to the open state. After the control, the display unit is set to the off display state, and the display unit is set to the switching display state until the remote control relay is switched from the open state to the closed state and from the closed state to the open state in response to the operation input. Configured as
The switch device is configured to distinguishably display the on display state, the off display state, and the switching display state.   There are a plurality of remote control relays,
  The control unit displays the display unit in the switching display state during a period from when the operation unit is operated until all of the plurality of remote control relays are switched from the open state to the closed state or from the closed state to the open state. The switch device according to claim 1, wherein the switch device is configured as follows.   A load control system comprising: a remote control relay that opens and closes a power supply path from a power source to a load; and the switch device according to claim 1.

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