Self-reset switch circuit and electric equipment
By designing a self-reset switch circuit that uses three switching modules to form a signal trigger-hold circuit, the problem of insufficient reliability of the emergency shutdown function in the existing technology is solved, and the circuit structure is realized Simple, few components and reliable emergency shutdown function.
Patent Information
- Application Number
- CN202421219423.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-30
AI Technical Summary
When the existing self-reset switch circuit is operating for a long time in various indoor and outdoor environments, the number of components and the circuit structure is complex, resulting in insufficient reliability of the emergency shutdown function.
Design a self-reset switch circuit that uses three switching modules to form a signal trigger-hold circuit. Each key action of the self-reset switch triggers the flip of the signal state of the enable end of the electrical equipment, and maintains the key after the key is lifted. Energy terminal signal status.
It realizes a simple circuit structure and a small number of components, and can ensure the execution of the emergency shutdown function stably and reliably. It is suitable for power consumption equipment that operates for a long time under various environmental conditions.
Smart Images
Figure CN222464587U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of power switch control, and in particular, provides a self-resetting switch circuit and an electrical device using the self-resetting switch circuit. Background Art
[0002] The self-reset switch uses a mechanical self-reset button. Each time it is pressed, the switch state changes and remains in this state until the next button is pressed. Therefore, it can be used as an emergency stop button or button for various electrical equipment such as robots and tractors with embedded architectures, avoiding the risk of conventional manual switches being unable to shut down due to a pop-up failure after being pressed.
[0003] Since the above-mentioned electrical equipment generally needs to operate for a long time under various environmental conditions indoors and outdoors, it is necessary to ensure that it can be shut down in time when various emergencies occur. Obviously, the circuit used to cooperate with the self-resetting switch should meet the requirements of a small number of components and a simple and stable circuit structure as much as possible to ensure the reliability of its emergency shutdown function.
[0004] Therefore, it is necessary to optimize the design and improve the control circuit supporting the self-resetting switch. Utility Model Content
[0005] The purpose of the present application is to provide a self-resetting switch circuit with a simple circuit structure, a small number of components and high reliability, and an electrical device using the self-resetting switch circuit.
[0006] The embodiments of the present application can be implemented through the following technical solutions:
[0007] A self-resetting switch circuit comprises a first switching module, a second switching module and a third switching module; the first input ends of the first switching module and the second switching module are both connected to the power supply end of the switch circuit, and the second input ends are both connected to the trigger contact of the self-resetting switch, and the trigger contact is grounded when the self-resetting switch is pressed, and is suspended in the air when it is popped up; the first output ends of the first switching module and the third switching module are both connected to the power supply end of an electrical device, and the second output ends are both connected to the enable end of the electrical device; the first output end of the second switching module is connected to the trigger end, and the second output end is grounded; the first input end of the third switching module is connected to the power supply enable end, and the second input end is grounded; the first output ends and the second output ends of the three switching modules are all turned on when the voltage difference between the first input end and the second input end is greater than the conduction threshold; each time the first output end and the second output end of the second switching module are turned on, the potential of the power supply enable end is switched once.
[0008] The self-resetting switch circuit provided in the present application uses three switching modules to form a signal trigger-hold circuit. Each time a button is pressed on the self-resetting switch, the enable end signal state of the electrical equipment is flipped, and the enable end signal state is maintained after the button is released until the next trigger signal of the self-resetting button is received. The entire circuit structure is simple, the number of components is small, and the execution of the emergency shutdown function can be stably and reliably guaranteed.
[0009] Preferably, the first switching module, the second switching module and the third switching module are all optical coupling modules.
[0010] Furthermore, the first input terminal and the second input terminal of the optical coupling module are respectively connected to the positive electrode and the negative electrode of the light emitting diode, and the first output terminal and the second output terminal are respectively connected to the collector and the emitter of the phototransistor.
[0011] Preferably, the trigger end is connected to an IO input pin of a control module of the power-consuming device, the power supply enable end is connected to an IO output pin of the control module, and the control module is enabled through the enable end.
[0012] Preferably, the self-resetting switch circuit also includes an edge-triggered level conversion circuit, the first output end of the second switching module is connected to the signal input end of the edge-triggered level conversion circuit, and the signal output end of the edge-triggered level conversion circuit is connected to the first input end of the third switching module.
[0013] Optionally, the power supply terminal of the switch circuit is connected to the power supply terminal of the electrical device.
[0014] Preferably, resistors are connected between the first input terminals of the first switching module and the second switching module and the trigger contact, and between the third switching module and the power supply enabling terminal.
[0015] An electric device is started and shut down by using a self-resetting switch and the aforementioned self-resetting switch circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the architecture of a self-resetting switch circuit provided according to an embodiment of the present application.
[0017] Figure 2 A schematic diagram of the appearance of a circuit board provided according to a specific embodiment of the present application;
[0018] Figure 3 The present invention is a connection diagram of a self-resetting switch circuit provided according to a specific embodiment of the present application.
[0019] Numbers in the figure
[0020] A first switching module 100 , a first resistor 101 , a second switching module 200 , a second resistor 102 , a third switching module 300 , a third resistor 103 , and a self-reset button 400 . DETAILED DESCRIPTION
[0021] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.
[0022] In addition, various components in the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.
[0023] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance, and their names may be different in the detailed description and claims of the present application.
[0024] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.
[0025] Figure 1 Schematic diagram of a self-resetting switch circuit according to some embodiments of the present application, such as Figure 1 As shown, the self-resetting switch circuit includes three switching modules: a first switching module 100 , a second switching module 200 and a third switching module 300 .
[0026] Furthermore, the first switching module 100 includes a first input terminal a11, a second input terminal a12, and a first output terminal b11 and a second output terminal b12, wherein when the voltage difference between the first input terminal a11 and the second input terminal a12 is greater than the conduction threshold, the first output terminal b11 and the second output terminal b12 are turned on.
[0027] In some preferred embodiments, the three switching modules can be implemented using the same circuit structure. The specific implementations of the first input terminal a21, the second input terminal a22, the first output terminal b21, and the second output terminal b22 of the second switching module 200, and the first input terminal a31, the second input terminal a32, the first output terminal b31, and the second output terminal b32 of the third switching module 300 can all refer to the first switching module 100. Using the same circuit structure can further reduce the complexity of the circuit, unify the specifications of components and reduce manufacturing costs.
[0028] The self-resetting switch circuit is used to cooperate with a mechanical self-resetting switch to achieve the following functions: each time the switch is pressed, the power-on / off state of the electrical device is switched once (the electrical device in this application is powered by the power supply terminal VIN and started by setting the enable terminal EN to a high level), and the state remains unchanged when the switch pops up until the next switch operation is pressed.
[0029] The structure of the mechanical self-resetting switch can adopt various specific embodiments known to those skilled in the art, such as Figure 1 A specific mechanical self-reset switch includes a self-reset button 400 and two contacts, one of which is grounded. In this application, the contact is called a ground contact; the other contact is called a trigger contact, which is represented by KEY ON / OFF in the figure.
[0030] The parts of the reset button 400 that are in contact with the two contacts are connected by a conductive material. When the self-reset button 400 is pressed, the ground contact and the trigger contact are connected, so that the trigger contact is grounded. When the self-reset button 400 pops up, the trigger contact is suspended. Therefore, each time the self-reset button 400 is pressed, a low-level signal will be triggered, and the on / off state of the electrical equipment will be switched through the self-reset switch circuit.
[0031] Furthermore, if Figure 1 As shown, the specific connection method of the three switching modules of the self-resetting switch circuit is:
[0032] 1) The first input terminal a11 of the first switching module 100 and the first input terminal a21 of the second switching module 200 are both connected to the power supply terminal B+ of the switch circuit (in the present application, the connection between the components is an electrical connection through a wire), and the second input terminal a12 of the first switching module 100 and the second input terminal a22 of the second switching module 200 are both connected to the trigger contact of the self-reset switch;
[0033] 2) The first output terminal b11 of the first switching module 100 and the first output terminal b31 of the third switching module 300 are both connected to the power terminal VIN of the electric device, and the second output terminal b12 of the first switching module 100 and the second output terminal b32 of the third switching module 300 are both connected to the enable terminal EN of the electric device; the first output terminal of the second switching module is connected to the trigger terminal KEY, and the second output terminal is grounded;
[0034] 3) The first input terminal a31 of the third switching module 300 is connected to the power enable terminal DC-DC EN, the second input terminal a32 is grounded, and the potential of the power enable terminal DC-DC EN is switched every time the first output terminal b21 and the second output terminal b22 of the second switching module 200 are turned on.
[0035] The specific working principle of the self-resetting switch circuit is:
[0036] a. When the electrical device is turned off, after the self-reset button 400 is pressed, KEY ON / OFF obtains a low-level signal. At this time, the first output terminal b11 and the second output terminal b12 of the first switching module 100 are turned on, the EN pin is connected to the VIN pin, and the electrical device is turned on; at the same time, the first output terminal b21 and the second output terminal b22 of the second switching module 200 are turned on, and the trigger terminal KEY pin obtains a low-level signal. At this time, the DC-DC EN outputs and maintains a high-level signal, so that the first output terminal b31 of the third switching module 300 and the second output terminal b32 are continuously turned on, and the connection between VIN and EN and the power-on state of the electrical device are maintained after the self-reset button 400 is popped up.
[0037] b. When the self-reset button 400 is pressed again, KEY ON / OFF obtains a low-level signal. At this time, KEY triggers the low-level signal again, the DC-DC EN potential is reversed, and the low-level signal is output and maintained, so that VIN is disconnected from EN, thereby shutting down the electrical equipment.
[0038] The self-resetting switch circuit provided in the present application uses three switching modules to form a signal trigger-hold circuit. Each time a button is pressed on the self-resetting switch, the enable end signal state of the electrical equipment is flipped, and the enable end signal state is maintained after the button is released until the next trigger signal of the self-resetting button is received. The entire circuit structure is simple, the number of components is small, and the execution of the emergency shutdown function can be stably and reliably guaranteed.
[0039] In some preferred embodiments, a first resistor 101 is connected in series between the first input terminal a11 of the first switching module 100 and the trigger contact KEY ON / OFF; a second resistor 201 is connected in series between the first input terminal a21 of the second switching module 200 and the trigger contact KEY ON / OFF; and a third resistor 301 is connected in series between the first input terminal a31 of the third switching module 300 and the power supply enable terminal DC-DC EN.
[0040] In some specific embodiments, the self-resetting switch circuit can be placed on a circuit substrate together with modules such as a control circuit of an electrical device. Figure 2 The figure shows the appearance of a circuit substrate in a specific embodiment.
[0041] In order to realize the integration and miniaturization of electrical equipment, the internal structure of the above equipment is generally compact. In order to make the most reasonable use of the internal space, the size of the circuit substrate is also set to be small. For example, Figure 2 The diameter of the circuit substrate shown does not exceed 70 mm. At the same time, it is also necessary to ensure that sufficient accommodation space is reserved for important functional modules of the equipment and reduce the overall manufacturing cost. Therefore, in some preferred embodiments, the first switching module 100, the second switching module 200 and the third switching module 300 are all optocoupler modules.
[0042] Figure 3 A preferred embodiment of the present application is shown. In this embodiment, the three switching modules J3, J4, and J5 are all optocoupler modules of model TLP181.
[0043] Specifically, Figure 3 As shown, the first input terminal (pin 1) and the second input terminal (pin 2) of the TLP181 optocoupler module are connected to the positive and negative electrodes of the light-emitting diode respectively, and the first output terminal (pin 4) and the second output terminal (pin 3) are connected to the collector and emitter of the phototransistor respectively. The specific connection method between the pins can be referred to the previous text and Figure 1 .
[0044] A variety of implementation methods can be used to achieve switching and maintaining the position of the power supply enable terminal DC-DC EN according to the low-level trigger signal output by the trigger terminal KEY. For example, in some preferred embodiments, the trigger terminal KEY of the self-reset switch circuit is connected to the IO input pin of the control module (such as the MCU module) of the power supply device, and the power supply enable terminal DC-DC EN is connected to the IO output pin of the control module. The control module is also enabled by the signal sent by the enable terminal EN. When it is started by the high-level signal of the enable terminal EN, it can obtain the low-level signal of the KEY terminal input by the IO input pin, and maintain the DC-DC EN at a high level through the IO output pin.
[0045] In some other preferred embodiments, an edge-triggered level conversion circuit can also be added to the self-resetting switch circuit. The specific structure and implementation method of the edge-triggered level conversion circuit are already known to those skilled in the art. Specifically, the first output terminal b21 of the second switching module 200 can be connected to the signal input terminal of the edge-triggered level conversion circuit, and the signal output terminal of the edge-triggered level conversion circuit can be connected to the first input terminal a31 of the third switching module 300, and the trigger mode of the edge-triggered level conversion circuit can be set to low-level trigger, so that each time a low-level signal is received, the potential of the output signal is switched once and maintained until the next low-level signal arrives, thereby achieving the effect of DC-DC EN being triggered by the KEY signal to switch and maintain.
[0046] Some embodiments of the present application also provide an electrical device, which uses a self-resetting switch and a self-resetting switch circuit to start and shut down. The specific implementation method thereof can be referred to the above text and drawings, and will not be repeated here.
[0047] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.
Claims
1. A self-resetting switch circuit, characterized in that: It includes a first switching module, a second switching module and a third switching module; The first input ends of the first switching module and the second switching module are both connected to the power supply end of the switch circuit, and the second input ends are both connected to the trigger contact of the self-reset switch, and the trigger contact is grounded when the self-reset switch is pressed, and is suspended when it is popped up; The first output terminals of the first switching module and the third switching module are both connected to the power supply terminal of the electric device, and the second output terminals are both connected to the enable terminal of the electric device; The first output terminal of the second switching module is connected to the trigger terminal, and the second output terminal is grounded; The first input terminal of the third switching module is connected to the power supply enabling terminal, and the second input terminal is grounded; The first output terminals and the second output terminals of the three switching modules are all turned on when the voltage difference between the first input terminals and the second input terminals is greater than the turn-on threshold, and each time the first output terminal and the second output terminal of the second switching module are turned on, the potential of the power supply enable terminal is switched once.
2. The self-resetting switch circuit according to claim 1, characterized in that: The first switching module, the second switching module and the third switching module are all optical coupling modules.
3. The self-resetting switch circuit according to claim 2, characterized in that: The first input end and the second input end of the optical coupling module are respectively connected to the positive electrode and the negative electrode of the light emitting diode, and the first output end and the second output end are respectively connected to the collector and the emitter of the phototransistor.
4. The self-resetting switch circuit according to claim 1, characterized in that: The trigger end is connected to the IO input pin of the control module of the power-consuming device, the power supply enabling end is connected to the IO output pin of the control module, and the control module is enabled through the enabling end.
5. The self-resetting switch circuit according to claim 1, characterized in that: The self-resetting switch circuit also includes an edge-triggered level conversion circuit, the first output end of the second switching module is connected to the signal input end of the edge-triggered level conversion circuit, and the signal output end of the edge-triggered level conversion circuit is connected to the first input end of the third switching module.
6. The self-resetting switch circuit according to claim 1, characterized in that: The power supply terminal of the switch circuit is connected to the power supply terminal of the electrical equipment.
7. The self-resetting switch circuit according to any one of claims 1 to 6, characterized in that: Resistors are connected between the first input terminals of the first switching module and the second switching module and the trigger contact, and between the third switching module and the power supply enabling terminal.
8. An electrical device, characterized in that: The self-resetting switch and the self-resetting switch circuit as claimed in claim 1 are used for starting and shutting down.