An electronic switching circuit and an electronic switching device

Abstract

The application discloses an electronic switch circuit and an electronic switch device. The electronic switch circuit comprises: a power supply circuit, which is used for receiving commercial power, converting the commercial power, and outputting a first voltage and a second voltage; a control circuit, which is connected with the power supply circuit and used for receiving the second voltage; a switch circuit, which is connected with the power supply circuit, the control circuit and an industrial control device respectively and used for receiving the first voltage and the commercial power; and a button, a first end of the button being connected with the control circuit, a second end of the button being grounded, and the button being arranged on an operation table of the industrial control device; wherein the control circuit is used for controlling the switch circuit to be disconnected when a connection time length of the first end of the button and the second end of the button is greater than or equal to a first preset time length, so that the industrial control device is powered off. Through the above manner, the emergency response time is shortened, and the processing efficiency for the sudden situation is improved.

Description

Technical Field

[0001] This application relates to the field of industrial control technology, and in particular to an electronic switching circuit and an electronic switching device. Background Technology

[0002] In traditional industrial control, industrial control equipment is typically connected directly to the power grid via mechanical switches. This connection method relies on manual operation of the mechanical switches to perform power-on / off and restart operations on the industrial control equipment. However, when dealing with large and complex industrial control equipment (such as large production lines and heavy machinery), there is often a significant spatial distance between the control console or key locations and the main switch (mechanical switch). When an abnormal situation occurs during the operation of the industrial control equipment, such as jamming, loss of control, or the need for emergency reset, the operator needs to physically move a long distance back and forth between the control console and the main switch to manually cut off the power, wait, and then close the switch again. This method not only consumes emergency response time but also significantly reduces the efficiency of handling emergencies. Utility Model Content

[0003] This application mainly provides an electronic switching circuit and electronic switching device to solve the problem of low efficiency in handling emergencies.

[0004] This application provides an electronic switching circuit, including: The power supply circuit is used to receive mains power, convert the mains power, and output a first voltage and a second voltage. A control circuit, connected to the power supply circuit, is used to receive the first voltage and the second voltage; A switching circuit is connected to the power supply circuit, the control circuit, and the industrial control equipment, respectively, and is used to receive the first voltage and the mains power. A button, the first end of which is connected to the control circuit, the second end of which is grounded, and the button is disposed on the operating panel of the industrial control equipment; The control circuit is used to control the switch circuit to disconnect when the connection time after the first end of the button and the second end of the button are electrically connected is greater than or equal to a first preset time, so as to de-energize the industrial control equipment.

[0005] In some embodiments, the control circuit includes an isolation circuit, a control chip circuit, and a first switching transistor. A first terminal of the isolation circuit is connected to a first terminal of the button, a second terminal of the isolation circuit is connected to the power supply circuit, a third terminal of the isolation circuit is connected to a first terminal of the control chip circuit, a fourth terminal of the isolation circuit is connected to a second terminal of the control chip circuit, the second terminal of the control chip circuit is grounded, the third terminal of the control chip circuit is connected to the power supply circuit, the fourth terminal of the control chip circuit is connected to the control terminal of the first switching transistor, a first terminal of the first switching transistor is connected to the switching circuit, and a second terminal of the first switching transistor is grounded.

[0006] In some embodiments, the control chip circuit is used to control the first switch to disconnect and the switch circuit to disconnect when the connection duration after the first end of the button and the second end of the button are electrically connected is greater than or equal to the first preset duration.

[0007] In some embodiments, the control chip circuit is used to control the first switch tube to turn on and the switch circuit to turn on when the connection duration after the first end of the button and the second end of the button are electrically connected is greater than or equal to a second preset duration.

[0008] In some embodiments, the control circuit includes an isolation circuit, a second resistor, a control chip circuit, and a first switching transistor. A first terminal of the control chip circuit is connected to a first terminal of the button. A second terminal of the control chip circuit is connected to the power supply circuit. A third terminal of the control chip circuit is connected to a first terminal of the isolation circuit. A fourth terminal of the control chip circuit is grounded. A second terminal of the isolation circuit is connected to the power supply circuit. A third terminal of the isolation circuit is connected to the control terminal of the first switching transistor. A first terminal of the first switching transistor is connected to the switching circuit. A second terminal of the first switching transistor is grounded. One end of the second resistor is connected between the third terminal of the isolation circuit and the control terminal of the first switching transistor. The other end of the second resistor is connected to the power supply circuit. The fourth terminal of the isolation circuit is grounded.

[0009] In some embodiments, the isolation circuit includes an optocoupler and a first resistor, one end of the first resistor is connected to a first end of the button, the other end of the first resistor is connected to a first end of the optocoupler, a second end of the optocoupler is connected to the power supply circuit, a third end of the optocoupler is connected to a first end of the control chip circuit, and a fourth end of the optocoupler is connected to a second end of the control chip circuit.

[0010] In some embodiments, the isolation circuit includes an optocoupler and a first resistor. One end of the first resistor is connected to the third terminal of the control chip circuit, the other end of the first resistor is connected to the second terminal of the optocoupler and the power supply circuit, the third terminal of the optocoupler is connected to the control terminal of the first switching transistor, and the fourth terminal of the optocoupler is grounded.

[0011] In some embodiments, the switching circuit includes a relay, a first terminal of the relay is connected to the power supply circuit, a second terminal of the relay is connected to the first terminal of the first switching transistor, a third terminal of the relay is used to receive the mains power, and a fourth terminal of the relay is connected to the industrial control equipment.

[0012] In some embodiments, the control circuit is used to control the switch circuit to conduct when the connection duration after the first end of the button and the second end of the button are electrically connected is greater than or equal to a second preset duration, so as to supply power to the industrial control equipment.

[0013] This application also provides an electronic switching device, including the electronic switching circuit as described above.

[0014] The beneficial effects of this application are: by setting the buttons on the operating table of the industrial control equipment, when an abnormal situation occurs during the operation of the industrial control equipment, the operator only needs to operate the buttons to make the connection time after the first end of the button and the second end of the button are electrically connected greater than or equal to the first preset time, so as to cut off the power of the industrial control equipment, shorten the emergency response time, and improve the efficiency of handling emergencies. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a circuit diagram of one embodiment of the electronic switch circuit provided in this application; Figure 2 This is a circuit diagram of another embodiment of the electronic switch circuit provided in this application; Figure 3 This is a circuit diagram of another embodiment of the electronic switch circuit provided in this application.

[0016] Reference numerals: 100, Electronic switch circuit; 10, Power supply circuit; 20, Control circuit; 30, Switch circuit; 40, Industrial control equipment; 21, Isolation circuit; S1, Button; VCC, First voltage; VPP, Second voltage; VDD, Third voltage; U1, Control chip circuit; Q1, First switching transistor; O1, Optocoupler; R1, First resistor; K1, Relay; R2, Second resistor. Detailed Implementation

[0017] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0019] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Please see Figures 1-2 As shown, Figure 1 This is a circuit diagram of one embodiment of the electronic switch circuit provided in this application; Figure 2 This is a circuit diagram of another embodiment of the electronic switch circuit provided in this application. The electronic switch circuit 100 of this embodiment includes a power supply circuit 10, a control circuit 20, a switch circuit 30, and a button S1.

[0022] The power supply circuit 10 receives mains power, converts the mains power, and outputs a first voltage VCC and a second voltage VPP. In some embodiments, the power supply circuit 10 also outputs a third voltage VDD, wherein the third voltage VDD can be generated by stepping down the first voltage VCC, or the third voltage VDD can be directly generated by using the first voltage VCC.

[0023] like Figure 2 As shown, the power supply circuit 10 receives mains power through the grid input, converts the mains power, such as AC to DC and step-down, and finally outputs the first voltage VCC, the second voltage VPP and the third voltage VDD.

[0024] Control circuit 20 is connected to power supply circuit 10 and is used to receive a first voltage VCC and a second voltage VPP. Optionally, control circuit 20 is also used to receive a third voltage VDD. Figure 2 As shown, the second voltage VPP and the third voltage VDD output by the power supply circuit 10 supply power to the control circuit 20.

[0025] The switching circuit 30 is connected to the power supply circuit 10, the control circuit 20 and the industrial control equipment 40 respectively, and is used to receive the first voltage VCC and the mains power.

[0026] like Figure 2 As shown, the first voltage VCC output by the power supply circuit 10 is used to power the switching circuit 30. After the switching circuit 30 is turned on, the mains power supplies the industrial control equipment 40 through the switching circuit 30.

[0027] Among them, industrial control equipment 40 includes, but is not limited to, flat knitting machines, sock machines, embroidery machines, etc.

[0028] The first end of button S1 is connected to the control circuit 20, the second end of button S1 is grounded, and button S1 is mounted on the operating panel of the industrial control equipment 40. Specifically, the second end of button S1 is connected to protective ground.

[0029] The control circuit 20 is used to disconnect the switch circuit 30 when the connection time after the first end of the button S1 is electrically connected to the second end of the button S1 is greater than or equal to the first preset time, so as to de-energize the industrial control equipment 40.

[0030] In some embodiments, the operator operates the button by pressing it, and the first and second ends of the button are electrically connected. If the connection duration is greater than or equal to a first preset duration, the control circuit 20 receives the corresponding button signal, processes the button signal, and outputs a control signal to the switching circuit 30 to disconnect the switching circuit 30, thereby de-energizing the industrial control equipment 40. The power supply to the industrial control equipment 40 can be remotely controlled simply by pressing a button, greatly improving the efficiency and convenience of human-machine interaction.

[0031] The preset duration is a pre-set critical time threshold used to determine the validity of the action of button S1. For example, the first preset duration is used to determine the validity of a long press of button S1 (power off of industrial control equipment 40), and the first preset duration is 3 seconds.

[0032] In this embodiment, by setting button S1 on the operating table of industrial control equipment 40, when an abnormal situation occurs during the operation of industrial control equipment 40, the operator only needs to operate button S1 to make the connection time after the first end of button S1 and the second end of button S1 are electrically connected greater than or equal to the first preset time, so as to cut off the power of industrial control equipment 40, shorten the emergency response time, and improve the efficiency of handling emergencies.

[0033] According to some embodiments of this application, the control circuit 20 is used to control the switch circuit 30 to conduct when the connection time after the first end of the button S1 and the second end of the button S1 are electrically connected is greater than or equal to a second preset time, so as to supply power to the industrial control equipment 40.

[0034] The second preset duration is used to determine the validity of a short press of button S1 (powered by the industrial control equipment 40).

[0035] The operator operates button S1 by pressing button S1, and the first end of button S1 and the second end of button S1 are electrically connected. If the connection duration of the electrical connection is greater than or equal to the second preset duration, the control circuit 20 receives the corresponding button signal, processes the button signal, and outputs a control signal to the switch circuit 30 to control the switch circuit 30 to conduct, so that the mains power supplies the industrial control equipment 40 through the switch circuit 30.

[0036] In some embodiments, the second preset duration is less than the first preset duration. Specifically, when the electrical connection duration between the first end of button S1 and the second end of button S1 is greater than or equal to the second preset duration and less than the first preset duration, the control switch circuit 30 is turned on to supply power to the industrial control equipment 40.

[0037] For example, if the first preset duration is 3 seconds and the second preset duration is 100ms, and the connection duration of the first end of button S1 and the second end of button S1 is 100ms, the connection duration is equal to the second preset duration and less than the first preset duration. When the control circuit 20 controls the switch circuit 30 to conduct, the mains power supplies the industrial control equipment 40.

[0038] In other embodiments, the second preset duration is greater than the first preset duration. Specifically, when the electrical connection duration between the first end and the second end of button S1 is greater than or equal to the second preset duration, the control switch circuit 30 is turned on to supply power to the industrial control equipment 40; conversely, if the electrical connection duration between the first end and the second end of button S1 is greater than or equal to the first preset duration and less than the second preset duration, the control switch circuit 30 is turned off to de-energize the industrial control equipment 40.

[0039] According to some embodiments of this application, see Figure 2 As shown, the control circuit 20 of this embodiment includes an isolation circuit 21, a control chip circuit U1, and a first switching transistor Q1. The first end of the isolation circuit 21 is connected to the first end of the button S1, the second end of the isolation circuit 21 is connected to the power supply circuit 10, the third end of the isolation circuit 21 is connected to the first end of the control chip circuit U1, the fourth end of the isolation circuit 21 is connected to the second end of the control chip circuit U1, the second end of the control chip circuit U1 is grounded, the third end of the control chip circuit U1 is connected to the power supply circuit 10, the fourth end of the control chip circuit U1 is connected to the control terminal of the first switching transistor Q1, the first end of the first switching transistor Q1 is connected to the switching circuit 30, and the second end of the first switching transistor Q1 is grounded.

[0040] like Figure 2 As shown, in this embodiment, the second terminal of the control chip circuit U1 and the second terminal of the first switching transistor Q1 are connected to the reference ground.

[0041] The second terminal of the isolation circuit 21 is connected to the power supply circuit 10 to receive the second voltage VPP; the third terminal of the control chip circuit U1 is connected to the power supply circuit 10 to receive the third voltage VDD.

[0042] According to some embodiments of this application, the control chip circuit U1 is used to control the first switch Q1 to disconnect and the switch circuit 30 to disconnect when the connection time after the first end of the button S1 and the second end of the button S1 are electrically connected is greater than or equal to a first preset time.

[0043] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1 for a duration greater than or equal to a first preset duration. The corresponding button signal is transmitted to the control chip circuit U1 after being isolated by the isolation circuit 21. The control chip circuit U1 processes the button signal and outputs a control signal to control the first switch Q1 to disconnect, thereby controlling the switch circuit 30 to disconnect and the industrial control equipment 40 to be powered off.

[0044] In this embodiment, the control chip circuit U1 accurately detects and makes logical decisions on the connection duration of button S1, and controls the first switch tube Q1 and the switch circuit 30 to cut off the power supply to the industrial control equipment 40, which can avoid accidental power outages caused by accidental touch or interference.

[0045] According to some embodiments of this application, the control chip circuit U1 is used to control the first switch tube Q1 to conduct and the switch circuit 30 to conduct when the connection time after the first end of the button S1 and the second end of the button S1 are electrically connected is greater than or equal to the second preset time.

[0046] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1 for a duration greater than or equal to a second preset duration. The corresponding button signal is transmitted to the control chip circuit U1 after being isolated by the isolation circuit 21. The control chip circuit U1 processes the button signal and outputs a control signal to control the first switch Q1 to conduct, thereby controlling the switch circuit 30 to conduct and powering on the industrial control equipment 40.

[0047] According to some embodiments of this application, see Figure 3 As shown, Figure 3 This is a circuit diagram of another embodiment of the electronic switch circuit provided in this application. The control circuit 20 of this embodiment includes an isolation circuit 21, a second resistor R2, a control chip circuit U1, and a first switching transistor Q1. The first terminal of the control chip circuit U1 is connected to the first terminal of the button S1, the second terminal of the control chip circuit U1 is connected to the power supply circuit 10, the third terminal of the control chip circuit U1 is connected to the first terminal of the isolation circuit 21, and the fourth terminal of the control chip circuit U1 is grounded. The second terminal of the isolation circuit 21 is connected to the power supply circuit 10, the third terminal of the isolation circuit 21 is connected to the control terminal of the first switching transistor Q1, the first terminal of the first switching transistor Q1 is connected to the switch circuit 30, and the second terminal of the first switching transistor Q1 is grounded. One end of the second resistor R2 is connected between the third terminal of the isolation circuit 21 and the control terminal of the first switching transistor Q1, the other end of the second resistor R2 is connected to the power supply circuit 10, and the fourth terminal of the isolation circuit 21 is grounded.

[0048] like Figure 3 As shown, in this embodiment, the fourth terminal of the control chip circuit U1 is connected to the protective ground, and the second terminal of the first switching transistor Q1 and the fourth terminal of the isolation circuit 21 are connected to the reference ground.

[0049] In this embodiment, the power supply circuit 10 outputs a first voltage VCC and a third voltage VDD. Specifically, the second terminal of the control chip circuit U1 is connected to the power supply circuit 10 to receive the third voltage VDD; the second terminal of the isolation circuit 21 is connected to the power supply circuit 10 to receive the third voltage VDD; and the other terminal of the second resistor R2 is connected to the power supply circuit 10 to receive the first voltage VCC.

[0050] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1. The connection duration is greater than or equal to a first preset duration. The corresponding button signal is transmitted to the control chip circuit U1. The control chip circuit U1 processes the button signal, and the output control signal is isolated by the isolation circuit 21. This controls the first switch Q1 to turn off, thereby controlling the switch circuit 30 to turn off and the industrial control equipment 40 to be powered off. If the connection duration is less than the first preset duration, the first switch Q1 is controlled to turn on, thereby controlling the switch circuit 30 to turn on and the industrial control equipment 40 to be powered on.

[0051] According to some embodiments of this application, see Figure 2 As shown, the isolation circuit 21 in this embodiment includes an optocoupler O1 and a first resistor R1. One end of the first resistor R1 is connected to the first end of the button S1, the other end of the first resistor R1 is connected to the first end of the optocoupler O1, the second end of the optocoupler O1 is connected to the power supply circuit 10, the third end of the optocoupler O1 is connected to the first end of the control chip circuit U1, and the fourth end of the optocoupler O1 is connected to the second end of the control chip circuit U1.

[0052] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1 for a duration greater than or equal to a first preset duration. The corresponding button signal is transmitted to the control chip circuit U1 after being isolated by optocoupler O1. The control chip circuit U1 processes the button signal and outputs a control signal to control the first switching transistor Q1 to disconnect, thereby controlling the switching circuit 30 to disconnect and the industrial control equipment 40 to be powered off.

[0053] According to some embodiments of this application, see Figure 3 As shown, the isolation circuit 21 in this embodiment includes an optocoupler O1 and a first resistor R1. One end of the first resistor R1 is connected to the third end of the control chip circuit U1, the other end of the first resistor R1 is connected to the second end of the optocoupler O1 and the power supply circuit 10, the third end of the optocoupler O1 is connected to the control terminal of the first switching transistor Q1, and the fourth end of the optocoupler O1 is grounded.

[0054] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1 for a duration greater than or equal to a first preset duration. The corresponding button signal is transmitted to the control chip circuit U1. The control chip circuit U1 processes the button signal and outputs a control signal that is isolated by optocoupler O1 to control the first switching transistor Q1 to disconnect, thereby controlling the switching circuit 30 to disconnect and the industrial control equipment 40 to be powered off.

[0055] According to some embodiments of this application, see Figure 2 and Figure 3As shown, the switching circuit 30 in this embodiment includes a relay K1. The first end of the relay K1 is connected to the power supply circuit 10, the second end of the relay K1 is connected to the first end of the first switching transistor Q1, the third end of the relay K1 is used to receive mains power, and the fourth end of the relay K1 is connected to the industrial control equipment 40.

[0056] The first terminal of relay K1 is connected to power supply circuit 10 to receive the first voltage VCC.

[0057] In some embodiments, when an operator presses button S1, the first end of button S1 is electrically connected to the second end of button S1. The connection duration is greater than or equal to a first preset duration, and the corresponding button signal is transmitted to the control chip circuit U1. The control chip circuit U1 processes the button signal, outputs a control signal, controls the first switch Q1 to turn off, the relay K1 to turn off, and the industrial control equipment 40 to be powered off. When the connection duration is greater than or equal to a second preset duration, the relay K1 is activated, and the industrial control equipment 40 is powered on.

[0058] This embodiment compares the connection duration with the first preset duration and the second preset duration by setting a first preset duration and a second preset duration, thereby controlling the relay K1 to engage or disengage, which greatly increases the reliability and safety of operation.

[0059] Another embodiment of this application provides an electronic switching device, including the electronic switching circuit 100 of the above embodiment.

[0060] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electronic switching circuit, characterized in that, include: The power supply circuit is used to receive mains power, convert the mains power, and output a first voltage and a second voltage. A control circuit, connected to the power supply circuit, is used to receive the first voltage and the second voltage; A switching circuit is connected to the power supply circuit, the control circuit, and the industrial control equipment, respectively, and is used to receive the first voltage and the mains power. A button, the first end of which is connected to the control circuit, the second end of which is grounded, and the button is disposed on the operating panel of the industrial control equipment; The control circuit is used to control the switch circuit to disconnect when the connection time after the first end of the button and the second end of the button are electrically connected is greater than or equal to a first preset time, so as to de-energize the industrial control equipment.

2. The electronic switching circuit according to claim 1, characterized in that, The control circuit includes an isolation circuit, a control chip circuit, and a first switching transistor. The first terminal of the isolation circuit is connected to the first terminal of the button, the second terminal of the isolation circuit is connected to the power supply circuit, the third terminal of the isolation circuit is connected to the first terminal of the control chip circuit, the fourth terminal of the isolation circuit is connected to the second terminal of the control chip circuit, the second terminal of the control chip circuit is grounded, the third terminal of the control chip circuit is connected to the power supply circuit, the fourth terminal of the control chip circuit is connected to the control terminal of the first switching transistor, the first terminal of the first switching transistor is connected to the switching circuit, and the second terminal of the first switching transistor is grounded.

3. The electronic switching circuit according to claim 2, characterized in that, The control chip circuit is used to control the first switch to disconnect and the switch circuit to disconnect when the connection duration after the first end of the button and the second end of the button are electrically connected is greater than or equal to the first preset duration.

4. The electronic switching circuit according to claim 3, characterized in that, The control chip circuit is used to control the first switch tube to turn on and the switch circuit to turn on when the connection time after the first end of the button and the second end of the button are electrically connected is greater than or equal to a second preset time.

5. The electronic switching circuit according to claim 1, characterized in that, The control circuit includes an isolation circuit, a second resistor, a control chip circuit, and a first switching transistor. The first terminal of the control chip circuit is connected to the first terminal of the button, the second terminal of the control chip circuit is connected to the power supply circuit, the third terminal of the control chip circuit is connected to the first terminal of the isolation circuit, and the fourth terminal of the control chip circuit is grounded. The second terminal of the isolation circuit is connected to the power supply circuit, and the third terminal of the isolation circuit is connected to the control terminal of the first switching transistor. The first terminal of the first switching transistor is connected to the switching circuit, and the second terminal of the first switching transistor is grounded. One end of the second resistor is connected between the third terminal of the isolation circuit and the control terminal of the first switching transistor, and the other end of the second resistor is connected to the power supply circuit. The fourth terminal of the isolation circuit is grounded.

6. The electronic switching circuit according to claim 2, characterized in that, The isolation circuit includes an optocoupler and a first resistor. One end of the first resistor is connected to the first end of the button, and the other end of the first resistor is connected to the first end of the optocoupler. The second end of the optocoupler is connected to the power supply circuit, the third end of the optocoupler is connected to the first end of the control chip circuit, and the fourth end of the optocoupler is connected to the second end of the control chip circuit.

7. The electronic switching circuit according to claim 5, characterized in that, The isolation circuit includes an optocoupler and a first resistor. One end of the first resistor is connected to the third terminal of the control chip circuit, and the other end of the first resistor is connected to the second terminal of the optocoupler and the power supply circuit. The third terminal of the optocoupler is connected to the control terminal of the first switching transistor, and the fourth terminal of the optocoupler is grounded.

8. The electronic switching circuit according to claim 6 or 7, characterized in that, The switching circuit includes a relay, the first terminal of which is connected to the power supply circuit, the second terminal of which is connected to the first terminal of the first switching transistor, the third terminal of which is used to receive the mains power, and the fourth terminal of which is connected to the industrial control equipment.

9. The electronic switching circuit according to claim 1, characterized in that, The control circuit is used to control the switch circuit to conduct when the connection time after the first end of the button and the second end of the button are electrically connected is greater than or equal to a second preset time, so as to supply power to the industrial control equipment.

10. An electronic switching device, characterized in that, Includes the switching circuit as described in any one of claims 1-9.

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