A control device

Abstract

The application discloses a control device, relates to the technical field of switch devices, and comprises a shell, a lever, a movable contact, a circuit board and two static contacts, the movable contact, the circuit board and the two static contacts are arranged in the shell, the two static contacts are respectively a first static contact and a second static contact, the movable contact comprises a first contact part, a second contact part and a supporting part, two ends of the lever are respectively a control end and a fulcrum end, the fulcrum end is arranged in the shell, when the lever rotates, the fulcrum end moves towards one side close to the first contact part or one side close to the second contact part, and a live wire port, a zero line port, a first device port and a second device port are arranged on the shell, when the main switch is closed and city power is connected, the circuit enters a power-off protection state, the first device port and the second device port are in a power-off state, and devices do not act, so that the protection effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically to a control device. Background Technology

[0002] A switch is an electronic component that can open a circuit, interrupt current flow, or divert current to another circuit. The most common switches are mechanical devices operated by humans, containing one or more electronic contacts. A "closed" contact means that the electronic contacts are conducting, allowing current to flow; an "open" switch means that the electronic contacts are not conducting, forming an open circuit and preventing current from flowing.

[0003] The switches in the related technologies can only perform simple switching functions and do not have power protection functions.

[0004] In view of this, a control device is urgently needed. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention solves this problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A control device includes: a housing, a lever, a movable contact, a circuit board, and two stationary contacts. The movable contact, the circuit board, and the two stationary contacts are all disposed within the housing. The two stationary contacts are a first stationary contact and a second stationary contact. The movable contact includes a first contact portion, a second contact portion, and a support portion. The first contact portion and the second contact portion are respectively disposed on both sides of the support portion. The movable contact is electrically connected to the first stationary contact. The support portion is rotatably disposed within the housing. When the support portion rotates, the second contact portion moves closer to or further away from the second stationary contact. The lever has a control end and a fulcrum end at its two ends, respectively. The fulcrum end is disposed inside the housing. The lever is rotatably mounted on the housing. The fulcrum end abuts against the movable contact piece. When the lever rotates, the fulcrum end moves toward either the side closer to the first contact portion or the side closer to the second contact portion. The housing is provided with a live wire port, a neutral wire port, a first device port and a second device port. The live wire port, the neutral wire port, the first device port, the second device port and the two static contacts are electrically connected to different interfaces of the circuit board. The first device port and the second device port are connected to the device input terminal and the output terminal, respectively. The circuit board is equipped with a power failure protection unit. When the second contact part and the second stationary contact piece are in contact, the live wire port is connected to the mains power, and the power failure protection unit keeps the first device port and the second device port in a power failure state.

[0008] It also includes a bracket, which is electrically connected to the first stationary contact piece. The bracket is provided with a top and a limiting member. The support part is rotatably mounted on the top, and the limiting member is used to restrict the support part on the top.

[0009] The support is provided with a positioning plate, the positioning plate is provided with a groove, and the top head is provided in the groove.

[0010] The limiting component includes a limiting plate disposed on the bracket. The limiting plate is C-shaped. The top head is disposed inside the limiting plate. The positioning plate is movably disposed inside the limiting plate. The opening width of the limiting plate is greater than the width of the positioning plate.

[0011] The housing includes a left housing and a right housing, which are connected by snaps or bolts; The left housing is provided with a support platform and two pads. The two pads are respectively located at both ends of the support platform. A limiting groove is provided between the two pads and the support platform. The stationary contact piece is L-shaped. The two stationary contact pieces are respectively installed into the limiting groove from the direction closer to the right housing. One end of the stationary contact piece is locked in the limiting groove, and the other end is locked on the side of the support platform near the lever.

[0012] The housing contains a thyristor Q. The power failure protection unit includes a live wire interface L, a switch S, a first switch interface and a second switch interface, a first device interface M1, a second device interface M2, a neutral wire interface N, a power supply module, an MCU control module, a thyristor drive module, a zero-crossing signal module, and a power failure protection module, all mounted on the circuit board. The switch S has at least a first switch interface and a second switch interface. The live wire interface L is electrically connected to the first switch interface, the power supply module, and the zero-crossing signal module. The second switch interface is electrically connected to the second device interface M2. The thyristor Q has an anode, a cathode, and a G terminal. The power supply module is electrically connected to the neutral wire interface N and the anode. The first device interface M1 is electrically connected to the cathode and the power failure protection module. The thyristor drive module is electrically connected to the G terminal and the MCU control module. The power supply module is used to convert AC power into DC power and output DC power to power the MCU control module. The MCU control module is used to process the zero-crossing data from the zero-crossing signal module and output the thyristor trigger signal to the thyristor drive module according to the switch S signal; The thyristor drive module receives a control signal from the MCU control module and triggers the gate of the thyristor Q; The zero-crossing signal module is used to detect the zero-crossing point of the mains power and provide a synchronous trigger reference for the MCU control module; The power failure protection module is used to absorb the reverse electromotive force of the power grid at the moment of power failure to prevent voltage spikes from damaging the MCU control module or the thyristor Q. The live wire port is electrically connected to the live wire interface L, the neutral wire port is electrically connected to the neutral wire interface N, the first device port is electrically connected to the first device interface M1, the second device port is electrically connected to the second device interface M2, and the two stationary contacts are electrically connected to the first switch interface and the second switch interface, respectively.

[0013] The thyristor drive module includes a resistor R1, a transistor Q1, a resistor R10, and a resistor R9. The collector of the transistor Q1 is electrically connected to one end of the resistor R1, the base of the transistor Q1 is electrically connected to one end of both the resistor R9 and the resistor R10, the emitter of the transistor Q1 is grounded, the other end of the resistor R1 is electrically connected to the control electrode of the thyristor Q, and the other end of the resistor R9 is grounded. The MCU control module includes a microcontroller, which has ADC1 / P0.1 / INT1 pin, P1.2 / INT0 / SCL pin and P1.3 / SDA pin. The resistor R10 is electrically connected to the ADC1 / P0.1 / INT1 pin, the P1.2 / INT0 / SCL pin and the P1.3 / SDA pin.

[0014] The power supply module includes diode V1, diode D1, resistor R5, resistor R6, and capacitor C1. The positive terminal of capacitor C1 is electrically connected to the cathode of the thyristor Q, the neutral wire interface N, and the negative terminal of diode V1. The negative terminal of capacitor C1, the positive terminal of diode V1, and the positive terminal of diode D1 are all grounded. The negative terminal of diode V1 is electrically connected to the neutral wire interface N and the cathode of the thyristor Q. The positive terminal of diode V1 is electrically connected to the positive terminal of diode D1. One end of resistor R5 is electrically connected to the negative terminal of diode D1, and the other end is electrically connected to one end of resistor R6. The other end of resistor R6 is electrically connected to the live wire interface L and the first switch interface.

[0015] The zero-crossing signal module includes resistors R7 and R8 and capacitor C4. One end of resistor R7 is electrically connected to the fire wire interface L, the first switch interface, and one end of resistor R8. The microcontroller is provided with a P0.6 / ADC6 pin. The other end of resistor R8 is connected to one end of capacitor C4 and the P0.6 / ADC6 pin. The other end of capacitor C4 is grounded.

[0016] The power failure protection module includes resistors R2, R3, and R4, and capacitor C3. The microcontroller is equipped with pins P0.7 / ADC7 / PWM1 / CC3. One end of resistor R2 is electrically connected to one end of resistor R3, the first device interface M1, and the cathode. The other end of resistor R3 is electrically connected to the P0.7 / ADC7 / PWM1 / CC3 pin, one end of resistor R4, and one end of capacitor C3. The other end of resistor R4 is input with DC power, and the other end of capacitor C3 is grounded.

[0017] The following beneficial effects can be achieved by using the structure described above in this invention: In use, the output and input terminals of the device are electrically connected to the first and second device ports, respectively, and the mains power lines are connected to the live wire and neutral wire ports, respectively. During operation, the control terminal of the lever is moved, causing the lever to rotate and the fulcrum to slide on the moving contact. The moving contact rotates, causing it to contact or separate from the second stationary contact, thus closing or opening the switch. This allows the circuit board to receive different signals, thereby controlling the device. This application uses a lever to drive the moving contact, achieving high sensitivity and reducing the likelihood of accidental activation compared to push-button switches. Furthermore, the circuitry on the circuit board provides power-off protection. When mains power is connected while the main switch is closed (with the second contact and the second stationary contact in contact), the circuit enters a power-off protection state, de-energizing the first and second device ports and preventing the device from operating, thus providing protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram of the internal structure of the shell in this embodiment; Figure 3 This is a schematic diagram of the internal structure of the shell in this embodiment; Figure 4 This is a structural schematic diagram of the interior of the housing from another perspective in this embodiment; Figure 5 This is a circuit diagram on the circuit board in this embodiment.

[0019] In the diagram: 100, housing; 101, live wire port; 102, neutral wire port; 103, first device port; 104, second device port; 105, first capacitor interface port; 106, second capacitor port; 110, left housing; 120, right housing; 130, support platform; 140, pad; 150, limiting strip; 160, limiting groove; 200, lever; 210, rod body; 220, support rod; 300, moving contact piece; 310, first contact part; 320, second contact part; 330, support part; 340, positioning plate; 341, groove; 400, circuit board; 500, heat sink; 600, stationary contact piece; 700, bracket; 710, top head; 720, limiting plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or device.

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] Reference Appendix Figure 1-4 The control device shown includes: a housing 100, a lever 200, a movable contact 300, a circuit board 400, and two stationary contacts 600. The movable contact 300, the circuit board 400, and the two stationary contacts 600 are all disposed within the housing 100. The two stationary contacts 600 are respectively a first stationary contact and a second stationary contact. The movable contact 300 includes a first contact portion 310, a second contact portion 320, and a support portion 330. The first contact portion 310 and the second contact portion 320 are respectively disposed on both sides of the support portion 330. The movable contact 300 is electrically connected to the first stationary contact. The support portion 330 is rotatably disposed within the housing 100. When the support portion 330 rotates, the second contact portion 320 moves closer to or further away from the second stationary contact. The lever 200 has a control end and a fulcrum end at its two ends, respectively. The fulcrum end is located inside the housing 100. The lever 200 is rotatably mounted on the housing 100 (specifically, a rotating shaft can be provided on the ring side of the lever 200, with the axis of the rotating shaft perpendicular to the axis of the lever 200, and the rotating shaft is rotatably mounted inside the housing 100 to achieve the rotational setting of the lever 200). The fulcrum end abuts against the movable contact piece 300. When the lever 200 rotates, the fulcrum end moves toward either the side closer to the first contact portion 310 or the side closer to the second contact portion 320. That is, when the lever 200 moves toward the side of the first contact portion 310, the movable contact piece 300 rotates toward the side of the first contact portion 310, and vice versa. The stationary contact piece 600 and the movable contact piece 300 are both conductors, while the lever 200 is an insulator. The housing 100 is provided with a live wire port 101, a neutral wire port 102, a first device port 103 and a second device port 104. The live wire port 101, the neutral wire port 102, the first device port 103, the second device port 104 and two stationary contacts 600 are electrically connected to different interfaces of the circuit board 400, respectively. The first device port 103 and the second device port 104 are connected to the device input terminal and the device output terminal, respectively. The circuit board 400 is equipped with a power failure protection unit. When the second contact part 320 and the second stationary contact piece are in contact, the live wire port 101 is connected to the mains power, and the power failure protection unit keeps the first device port 103 and the second device port 104 in a power failure state.

[0024] Based on the above structure, in use, the output and input terminals of the device (e.g., motor M) are electrically connected to the first device port 103 and the second device port 104, respectively, and the mains power lines are connected to the live wire port 101 and the neutral wire port 102, respectively. In use, by moving the control terminal of the lever 200, the lever 200 rotates, causing the fulcrum to slide on the moving contact 300. The moving contact 300 rotates, causing it to contact or separate from the second stationary contact (the moving contact 300 is always connected to the first stationary contact), thus achieving the closing or opening of the switch, thereby enabling... The circuit board 400 receives different signals to control the device. This application uses the lever 200 to drive the moving contact 300 to achieve the closing and opening of the switch. It has high sensitivity and is less prone to accidental touches compared to push-button switches. The circuit on the circuit board 400 also provides power-off protection. When the main switch is closed (the second contact 320 and the second stationary contact are in contact) and mains power is connected, the circuit enters the power-off protection state, which keeps the first device port 103 and the second device port 104 in a power-off state, and the device does not operate, thus providing protection.

[0025] like Figures 2-4As shown, it also includes a bracket 700, which is electrically connected to the first stationary contact piece. The bracket 700 is provided with a top head 710 and a limiting member. The support part 330 is rotatably mounted on the top head 710. The limiting member is used to restrict the support part 330 onto the top head 710. To fix the relative position of the moving contact piece 300 and the top head 710, the support part 330 is provided with a positioning plate 340. The positioning plate 340 is provided with a groove 341, and the top head 710 is disposed within the groove 341. The positioning plate 340 is engaged with the top head 710, thereby achieving the positioning of the positioning plate 710. The positioning plate 340 is limited by 40, and the opening angle of the groove 341 is greater than the opening angle of the top head 710, so that the positioning plate 340 can move on the top head 710, and the movable contact piece 300 can rotate to both sides under the support of the top head 710; and, in this embodiment, it is preferable to provide two top heads 710 and two positioning plates 340, with two top heads 710 disposed on both sides of the bracket 700 and two positioning plates 340 disposed on both sides of the support part 330, thereby improving the support stability of the movable contact piece 300 and ensuring that the movable contact piece 300 rotates under the support of the top head 710.

[0026] like Figure 4 As shown, the limiting component includes a limiting plate 720 disposed on the bracket 700. The limiting plate 720 is C-shaped, and the top head 710 is disposed inside the limiting plate 720. The positioning plate 340 is movably disposed inside the limiting plate 720. The opening width of the limiting plate 720 is greater than the width of the positioning plate 340 (the width direction here refers to the direction relative to the two ends of the opening of the limiting plate 720). In this way, the positioning plate 340 is limited by the C-shaped limiting plate 720, preventing the positioning plate 340 from detaching from the top head 710 (the two ends of the opening of the limiting plate 720 limit the two sides of the positioning plate 340, keeping the positioning plate 340 inside the limiting plate 720), thus ensuring the realization of the function.

[0027] like Figure 1 As shown, the housing 100 includes a left housing 110 and a right housing 120. The left housing 110 and the right housing 120 are connected by snaps or bolts, which facilitates the disassembly and assembly of the housing 100 and makes maintenance easier.

[0028] like Figures 2-4As shown, to facilitate the installation of the stationary contact 600 and the moving contact 300, a support platform 130 and two pads 140 are provided inside the left housing 110. The two pads 140 are respectively located at both ends of the support platform 130. A limiting groove 160 is provided between the two pads 140 and the support platform 130. The stationary contact 600 is L-shaped, and the two stationary contact pieces 600 are respectively installed into the limiting grooves 160 from the direction closest to the right housing 120. One end of the stationary contact piece 600 is engaged with the... The other end of the movable contact 300 is locked in the limiting groove 160 and is attached to the side of the support platform 130 near the lever 200, so that the movable contact 300 is placed between the support platform 130 and the lever 200. In this way, the stationary contact 600 is supported by the support platform 130 and locked in the limiting groove 160. During installation, the stationary contact 600 is pressed into the limiting groove 160 from the side away from the left housing 110 to complete the installation of the stationary contact 600, which improves the efficiency of disassembly and assembly.

[0029] Further optimization involves integrating the bracket 700 and the first stationary contact piece. The bracket 700, top 710, and limiting plate 720 are all conductors. A limiting strip 150 is provided on the support platform 130. The side of the bracket 700 away from the first stationary contact piece rests against the limiting strip 150. Thus, before installation, the positioning plate 340 on the moving contact piece 300 is installed into the limiting plate 720, and then the stationary contact piece 600 is installed, thereby realizing the installation of the moving contact piece 300. This improves the efficiency of disassembly and assembly. Furthermore, the setting of the limiting strip 150 restricts the position of the bracket 700, improving the stability of the installation of the first stationary contact piece and the bracket 700.

[0030] In a further optimization, in this embodiment, the circuit board 400 is disposed on the side of the support platform 130 near the right housing 120, and a heat sink 500 is disposed on the side of the left housing 110 away from the circuit board 400. A thyristor Q is disposed inside the housing 100, and the thyristor Q is disposed on the side of the circuit board 400 near the heat sink 500. The heat sink 500 dissipates heat and reduces the temperature inside the housing 100 during operation.

[0031] like Figure 3 As shown, the lever 200 includes a rod body 210 and a support rod 220. The rod body 210 is rotatably mounted on the housing 100, and the support rod 220 passes through the rod body 210. The end of the support rod 220 away from the rod body 210 is the fulcrum end. The support rod 220 can be made of an elastic material. The support rod 220 and the movable contact piece 300 are interference-fitted to ensure that when the lever 200 rotates, the support rod 200 can pass over the support part 330 and then abut against the first contact part 310 or the second contact part 320.

[0032] like Figure 5As shown, this application also discloses a power failure protection unit, which includes a live wire interface L, a switch S, a first switch interface and a second switch interface, a first device interface M1, a second device interface M2, a neutral wire interface N, a power supply module, an MCU control module, a thyristor drive module, a zero-crossing signal module, and a power failure protection module, all disposed on a circuit board 400. The switch S has at least a first switch interface and a second switch interface. The live wire interface L is electrically connected to the first switch interface, the power supply module, and the zero-crossing signal module. The second switch interface is electrically connected to the second device interface M2. The thyristor Q has an anode, a cathode, and a G terminal. The power supply module is electrically connected to the neutral wire interface N and the anode. The first device interface M1 is electrically connected to the cathode and the power failure protection module. The thyristor drive module is electrically connected to the G terminal and the MCU control module. The circuit path is: 220V AC live wire L → switch → thyristor Q → motor M → neutral wire N. The power supply module is used to convert AC power into DC power and output DC power to power the MCU control module; The MCU control module is used to process the zero-crossing data from the zero-crossing signal module and output the thyristor trigger signal to the thyristor drive module according to the switch S signal; The thyristor driver module receives control signals from the MCU control module and triggers the gate of the thyristor Q; The zero-crossing signal module is used to detect the zero-crossing point of the mains power and provide a synchronous trigger reference for the MCU control module; The power failure protection module is used to absorb the reverse electromotive force of the power grid at the moment of power failure, to prevent voltage spikes from damaging the MCU control module or the thyristor Q. The live wire port 101 is electrically connected to the live wire interface L, the neutral wire port 102 is electrically connected to the neutral wire interface N, the first device port 103 is electrically connected to the first device interface M1, the second device port 104 is electrically connected to the second device interface M2, and the two stationary contact pieces 600 are electrically connected to the first switch interface and the second switch interface, respectively.

[0033] Based on the above circuit, when the main switch is open (moving contact 300 is disconnected from the second stationary contact), the entire machine is plugged into AC power. Then, the main switch is manually closed, and the motor M (or other equipment) operates normally. When the entire machine is operating normally, opening the main switch stops the motor. Closing the main switch again (moving contact 300 and the second stationary contact are closed) returns the entire machine to normal operation. When the main switch is closed, the entire machine is plugged into AC power and enters a power-off protection state, and the motor does not operate. If the main switch is closed, and a sudden power outage occurs, such as a power failure or a loose plug, the motor stops, and the entire machine enters a power-off protection state. In the power-off protection state, opening the main switch from the closed state and closing it again releases the power-off protection state, and the entire machine returns to normal operation. By using a microcontroller (MCU) in conjunction with zero-crossing detection and thyristor drive, the conduction angle of the AC mains power is precisely controlled, enabling motor (equipment) speed regulation and safe start-stop.

[0034] To achieve the above functions, the thyristor drive module includes a resistor R1, a transistor Q1, a resistor R10, and a resistor R9. The collector of transistor Q1 is electrically connected to one end of resistor R1, the base of transistor Q1 is electrically connected to one end of resistor R9 and one end of resistor R10, the emitter of transistor Q1 is grounded, the other end of resistor R1 is electrically connected to the control electrode of thyristor Q, and the other end of resistor R9 is grounded. The MCU control module includes a microcontroller U, which has ADC1 / P0.1 / INT1 pins (e.g., ...). Figure 5 The microcontroller U is labeled as 2), and the P1.2 / INT0 / SCL pins (as shown in Figure 2) are also present. Figure 5 (as shown by pin 3 of the microcontroller U) and the P1.3 / SDA pin (as shown by...) Figure 5 As shown in pin 4 of the microcontroller U, resistor R10 is electrically connected to the ADC1 / P0.1 / INT1 pin, P1.2 / INT0 / SCL pin, and P1.3 / SDA pin. Thus, when the switch is open and AC power is supplied: pin 3 (SW) of the microcontroller U is at a low level, and the SCR TR is not triggered. Then, when the switch is closed, pin 3 (SW) of the microcontroller U changes from low to high, triggering the SCR TR and starting the motor. When the switch is closed and AC power is supplied, pin 3 (SW) of the microcontroller U is at a high level, triggering the power-off protection; the SCR TR is not triggered, and the motor does not start. Then, when the switch is opened again, pin 3 (SW) of the microcontroller U changes from high to low, the SCR is not triggered, and the motor remains in standby mode. Then, when the switch is closed again, pin 3 (SW) of the microcontroller U changes from low to high, triggering the SCR and starting the motor. This achieves the protection function.

[0035] The power supply module includes diode V1, diode D1, resistors R5 and R6, and capacitor C1. The positive terminal of capacitor C1 is electrically connected to the cathode of the thyristor Q, the neutral terminal N, and the negative terminal of diode V1. The negative terminal of capacitor C1, the positive terminal of diode V1, and the positive terminal of diode D1 are all grounded. The negative terminal of diode V1 is electrically connected to the neutral terminal N and the cathode of the thyristor Q. The positive terminal of diode V1 is electrically connected to the positive terminal of diode D1. One end of resistor R5 is electrically connected to the negative terminal of diode D1, and the other end is electrically connected to one end of resistor R6. The other end of resistor R6 is electrically connected to both the live wire interface L and the first switch interface. Thus, the power supply module receives AC power that has been safely filtered, generating VCC and GND, which, like blood vessels, are distributed throughout the circuit diagram to power other modules. The MCU control module, directly powered by VCC, is the "brain" of the system; it provides operating voltage to the drive circuit inside the thyristor drive module; it provides power to the optocoupler or comparator circuit inside the zero-crossing signal module; and the power-off protection module also relies on VCC for status monitoring and logic judgment.

[0036] The zero-crossing signal module includes resistors R7 and R8, and capacitor C4. One end of resistor R7 is electrically connected to the live wire interface L, the first switch interface, and one end of resistor R8. The microcontroller has a P0.6 / ADC6 pin (e.g., ...). Figure 5 As shown in pin 6 of the microcontroller U, the other end of resistor R8 is connected to one end of capacitor C4 and pin P0.6 / ADC6. The other end of capacitor C4 is grounded. The module obtains a voltage signal from the AC power input (after filtering by the "Safety Regulations" and "Power Supply Module"). The circuit (usually containing optocouplers, comparators, or dedicated chips) converts the high-voltage AC signal into a low-level pulse signal that is synchronized with the zero-crossing point of the mains power and can be recognized by the MCU. This pulse signal is sent to a specific I / O port (pin P0.6 / ADC6) of the MCU control module. After receiving the zero-crossing signal, the MCU uses it as an external interrupt or timing reference to accurately calculate the delay and control the thyristor in the "SCR drive module" to conduct at the set time point, ultimately realizing the regulation of the load power.

[0037] The power failure protection module includes resistors R2, R3, and R4, as well as capacitor C3. The microcontroller has pins P0.7 / ADC7 / PWM1 / CC3 (e.g., ...). Figure 5 (as shown by the label 7 of the microcontroller U). One end of resistor R2 is electrically connected to one end of resistor R3, the first device interface M1, and the cathode. The other end of resistor R3 is electrically connected to the P0.7 / ADC7 / PWM1 / CC3 pin, one end of resistor R4, and one end of capacitor C3. The other end of resistor R4 is connected to DC power, and the other end of capacitor C3 is grounded. When the system power supply is normal, the monitoring circuit will maintain a stable state. When the input power supply VCC voltage drops or suddenly fails, the monitoring circuit will detect this change. If a power failure or voltage abnormality is detected, the control signal will change its state, physically cutting off the power supply path from the power supply to subsequent modules (such as the thyristor drive module and the MCU control module).

[0038] The MCU control module also includes capacitor C2, and the microcontroller also has a VCC pin (such as...). Figure 5 The microcontroller U (as shown by pin 1) and the GND pin (as shown by pin 1) Figure 5 As shown in the label 8 of the microcontroller U), one end of capacitor C2 is electrically connected to the VCC pin and inputs DC power, while the other end of capacitor C2 is connected to the GND pin and grounded.

[0039] It also includes a safety capacitor C, which has a first pin and a second pin. The circuit board 400 is provided with a first capacitor interface and a second capacitor interface. The first capacitor interface is electrically connected to the neutral line interface N, and the second capacitor interface is electrically connected to the second device interface M2. The housing 100 is provided with a first capacitor interface port 105 and a second capacitor port 106. The first capacitor interface port 105 is electrically connected to both the first pin and the first capacitor interface, and the second capacitor port 106 is electrically connected to both the second pin and the second capacitor interface. The safety capacitor C is connected across the power supply circuit to effectively filter out high-frequency noise generated by switching devices (such as thyristors, MCUs, etc.) in the circuit, preventing this noise from being conducted to the public power grid through the power line and interfering with other electronic devices. It also prevents interference from the power grid from entering the equipment and affecting its stable operation. Together with inductors and other components, it forms a filter circuit to smooth the power supply and provide a cleaner DC power supply for the subsequent MCU control module, thyristor drive module, etc., thus playing a safety protection role.

[0040] In summary, when the microcontroller outputs a high level, transistor Q1 conducts, and the gate G of the thyristor receives the trigger current; the thyristor anode A-cathode K conducts, the main circuit is energized, and the motor rotates; the triggering time is controlled by the zero-crossing signal, and the conduction angle (phase control) can be adjusted to change the average value of the motor terminal voltage, thereby achieving speed regulation.

[0041] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that are directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A control device, characterized in that, include: The device comprises a housing (100), a lever (200), a movable contact (300), a circuit board (400), and two stationary contacts (600). The movable contact (300), the circuit board (400), and the two stationary contacts (600) are all disposed within the housing (100). The two stationary contacts (600) are respectively a first stationary contact and a second stationary contact. The movable contact (300) includes a first contact portion (310), a second contact portion (320), and a support portion (330). The first contact portion (310) and the second contact portion (320) are respectively disposed on both sides of the support portion (330). The movable contact (300) is electrically connected to the first stationary contact. The support portion (330) is rotatably disposed within the housing (100). When the support portion (330) rotates, the second contact portion (320) moves closer to or away from the second stationary contact. The lever (200) has a control end and a fulcrum end at its two ends, respectively. The fulcrum end is disposed inside the housing (100). The lever (200) is rotatably disposed on the housing (100). The fulcrum end abuts against the movable contact piece (300). When the lever (200) rotates, the fulcrum end moves toward the side closer to the first contact part (310) or the side closer to the second contact part (320). The housing (100) is provided with a live wire port (101), a neutral wire port (102), a first device port (103), and a second device port (104). The live wire port (101), the neutral wire port (102), the first device port (103), the second device port (104), and the two stationary contacts (600) are electrically connected to different interfaces of the circuit board (400), respectively. The first device port (103) and the second device port (104) are connected to the device input terminal and the device output terminal, respectively. The circuit board (400) is provided with a power failure protection unit. When the second contact part (320) and the second stationary contact piece are in contact, the live wire port (101) is connected to the mains power, and the power failure protection unit keeps the first device port (103) and the second device port (104) in a power failure state.

2. The control device according to claim 1, characterized in that: It also includes a bracket (700), which is electrically connected to the first stationary contact piece. The bracket (700) is provided with a top head (710) and a limiting member. The support part (330) is rotatably disposed on the top head (710), and the limiting member is used to restrict the support part (330) on the top head (710).

3. The control device according to claim 2, characterized in that: The support part (330) is provided with a positioning plate (340), the positioning plate (340) is provided with a groove (341), and the top head (710) is provided in the groove (341).

4. The control device according to claim 3, characterized in that: The limiting component includes a limiting plate (720) disposed on the bracket (700), the limiting plate (720) is C-shaped, the top head (710) is disposed inside the limiting plate (720), the positioning plate (340) is movably disposed inside the limiting plate (720), and the opening width of the limiting plate (720) is greater than the width of the positioning plate (340).

5. A control device according to claim 3, characterized in that: The housing (100) includes a left housing (110) and a right housing (120), which are connected by snaps or bolts; The left housing (110) is provided with a support platform (130) and two pads (140). The two pads (140) are respectively located at both ends of the support platform (130). A limiting groove (160) is provided between the two pads (140) and the support platform (130). The stationary contact piece (600) is L-shaped. The two stationary contact pieces (600) are respectively installed into the limiting groove (160) from the direction close to the right housing (120). One end of the stationary contact piece (600) is locked in the limiting groove (160), and the other end is locked on the side of the support platform (130) close to the lever (200).

6. A control device according to claim 1, characterized in that: The housing (100) contains a thyristor Q. The power failure protection unit includes a live wire interface L, a switch S, a first switch interface and a second switch interface, a first device interface M1, a second device interface M2, a neutral wire interface N, a power supply module, an MCU control module, a thyristor drive module, a zero-crossing signal module, and a power failure protection module, all disposed on the circuit board (400). The switch S has at least a first switch interface and a second switch interface. The live wire interface L is electrically connected to the first switch interface, the power supply module, and the zero-crossing signal module. The second switch interface is electrically connected to the second device interface M2. The thyristor Q has an anode, a cathode, and a G terminal. The power supply module is electrically connected to the neutral wire interface N and the anode. The first device interface M1 is electrically connected to the cathode and the power failure protection module. The thyristor drive module is electrically connected to the G terminal and the MCU control module. The power supply module is used to convert AC power into DC power and output DC power to power the MCU control module. The MCU control module is used to process the zero-crossing data from the zero-crossing signal module and output the thyristor trigger signal to the thyristor drive module according to the switch S signal; The thyristor drive module receives a control signal from the MCU control module and triggers the gate of the thyristor Q; The zero-crossing signal module is used to detect the zero-crossing point of the mains power and provide a synchronous trigger reference for the MCU control module; The power failure protection module is used to absorb the reverse electromotive force of the power grid at the moment of power failure, so as to prevent voltage spikes from damaging the MCU control module or the thyristor Q. The live wire port is electrically connected to the live wire interface L, the neutral wire port (102) is electrically connected to the neutral wire interface N, the first device port (103) is electrically connected to the first device interface M1, the second device port (104) is electrically connected to the second device interface M2, and the two stationary contact pieces (600) are electrically connected to the first switch interface and the second switch interface, respectively.

7. A control device according to claim 6, characterized in that: The thyristor drive module includes a resistor R1, a transistor Q1, a resistor R10, and a resistor R9. The collector of the transistor Q1 is electrically connected to one end of the resistor R1, the base of the transistor Q1 is electrically connected to one end of both the resistor R9 and the resistor R10, the emitter of the transistor Q1 is grounded, the other end of the resistor R1 is electrically connected to the control electrode of the thyristor Q, and the other end of the resistor R9 is grounded. The MCU control module includes a microcontroller, which has ADC1 / P0.1 / INT1 pin, P1.2 / INT0 / SCL pin and P1.3 / SDA pin. The resistor R10 is electrically connected to the ADC1 / P0.1 / INT1 pin, the P1.2 / INT0 / SCL pin and the P1.3 / SDA pin.

8. A control device according to claim 7, characterized in that: The power supply module includes diode V1, diode D1, resistor R5, resistor R6, and capacitor C1. The positive terminal of capacitor C1 is electrically connected to the cathode of the thyristor Q, the neutral wire interface N, and the negative terminal of diode V1. The negative terminal of capacitor C1, the positive terminal of diode V1, and the positive terminal of diode D1 are all grounded. The negative terminal of diode V1 is electrically connected to the neutral wire interface N and the cathode of the thyristor Q. The positive terminal of diode V1 is electrically connected to the positive terminal of diode D1. One end of resistor R5 is electrically connected to the negative terminal of diode D1, and the other end is electrically connected to one end of resistor R6. The other end of resistor R6 is electrically connected to the live wire interface L and the first switch interface.

9. A control device according to claim 8, characterized in that: The zero-crossing signal module includes resistors R7 and R8 and capacitor C4. One end of resistor R7 is electrically connected to the fire wire interface L, the first switch interface, and one end of resistor R8. The microcontroller is provided with a P0.6 / ADC6 pin. The other end of resistor R8 is connected to one end of capacitor C4 and the P0.6 / ADC6 pin. The other end of capacitor C4 is grounded.

10. A control device according to claim 8, characterized in that: The power failure protection module includes resistors R2, R3, and R4, and capacitor C3. The microcontroller is equipped with pins P0.7 / ADC7 / PWM1 / CC3. One end of resistor R2 is electrically connected to one end of resistor R3, the first device interface M1, and the cathode. The other end of resistor R3 is electrically connected to the P0.7 / ADC7 / PWM1 / CC3 pin, one end of resistor R4, and one end of capacitor C3. The other end of resistor R4 is input with DC power, and the other end of capacitor C3 is grounded.

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