FILN Professional Production Of The Plastic Button Switch Waterproof With Light
Switch waterproof (English name: push-button switch) refers to a switch that uses a button to push the transmission mechanism to make the moving contact and the static contact press or disconnect and realize the circuit switching.
Switch waterproof is a kind of master electrical appliance with simple structure and very wide application. In electrical automatic control circuits, it is used to manually send control signals to control contactors, relays, electromagnetic starters, etc.
There are many types of switch waterproof structures, which can be divided into ordinary snap button type, mushroom head type, self-locking type, self-resetting type, rotary handle type, indicator type, illuminated symbol type and key type, etc., including single button and double button. Buttons, three buttons and different combinations generally adopt a building block structure, consisting of a button cap, a return spring, a bridge contact and a shell, etc. They are usually made into a composite type, with a pair of normally closed contacts and normally open contacts. Some products can increase the number of contact pairs by connecting multiple elements in series.
19MM 24V Green LED Momentary Doorbell Push Button Switch is one of our specially developed products.
1) Application range of switch waterproof:
Usually switch waterproof can be used in ovens, electric fryers, washing machines, refrigerators, massage chairs and other furniture and electrical equipment, as well as industrial machinery and equipment.
Among them, the switch waterproof design has been widely recognized and applied in the doorbell industry.
2) The advantages of switch waterproof in the use of doorbell equipment
A. The switch waterproof 304 stainless steel shell makes the switch better adapt to the humid, alternating wind and rain environment. Make the switch more durable and will not rust, and will not produce copper rust, mildew and other problems after long-term use.
B.switch waterproof has been developed and designed by R&D engineers. The unique structural design inside the body ensures that the switch can achieve a waterproof effect in a humid, alternating wind and rain environment, and avoids the potential safety hazards of water leakage and electricity leakage of the switch. IP waterproof rating up to IP67
The short body design of C.switch waterproof solves the problem of restricted doorbell installation
The D.switch waterproof wiring method uses screw glue to fix the wires, which greatly facilitates the installer, and the terminal has no problem with the welding machine. Only a screwdriver can be easily and quickly connected to the switch.
Introduction to Switching Power Supply
Low-power switching power supplies are widely used in many electronic products such as measurement and control instrumentation, communication equipment, learning and entertainment, etc. with their many excellent performances.
With the increasingly prominent environmental and energy issues, people continue to increase environmental requirements for electronic products and pay more attention to the energy efficiency of electronic products. Designing pollution-free, low-power, high-efficiency green mode power supplies have become a hot spot in the research of switching power supply technology
Low-power switching power supplies apply transition mode active power factor correction, quasi-resonant variable power isolation conversion control and synchronous rectification and other advanced power control technologies to achieve the purpose of green switching power supply design.
The basic structure of switching power supply
All things must follow the law of conservation of energy, and switching power supplies are no exception. In fact, switching power supplies are also completed by transferring energy in the form of energy.
From the energy point of view, switching power supply can be divided into DC switching power supply mode and AC switching power supply mode. DC switching power supply mode mainly outputs DC signal power, while AC switching power supply mode mainly outputs AC signal power.
The DC switching power supply mode is the current mainstream model.
Control circuit and control circuit and other modules.
The AC and DC input voltage is passed through the LC filter, then the bridge rectifier and the bus electrolytic capacitor are smoothed to become a DC voltage, and then converted by the DC/DC converter, and then filtered by the diode rectifier and electrolytic capacitor to the output, in order to enable the circuit It becomes a closed-loop operation, and a control circuit is drawn at the output end, and then the amplifying circuit is transferred to the duty ratio control circuit to the DC/DC converter to form a closed loop. The expression method of duty ratio in the duty ratio control circuit
Defects of traditional switching power supply
Traditional switching power supplies basically use traditional circuits. Most of the circuit chips used in traditional circuits are PWM-controlled KA38 series chips. Switching MOSFETs are also used, and a startup resistor is also added. According to P=U*U/R shows that the standby power consumption on this circuit should be at least greater than 0.5W, and low power consumption requires standby power consumption at least less than 0.5W, and some even less than 0.3W.
If the power consumption is large, the power loss is undoubtedly huge for densely populated China. In addition, there are certain hazardous substances in traditional power supplies. According to the “Directive on Restricting the Use of Certain Hazardous Substances in Electrical and Electronic Equipment” in my country’s CCC standard, it has failed to achieve environmental protection functions.
The development direction of green switching power supply
Due to the many shortcomings of traditional power supplies, in order to effectively use energy, people have proposed green switching power supplies. Green switching power supplies mainly focus on high frequency, high efficiency, low power consumption, miniaturization, integration, modularization, and intelligence. High reliability, meeting EMC standards and environmental protection, and many other directions continue to develop.
Since the key technology of light, small and thin switching power supply is high frequency, major foreign switching power supply manufacturers are committed to the simultaneous development of new and highly intelligent components, especially to improve the loss of secondary rectifier devices, and to improve the power ratio. Fer rite (Mn Zn) material manufacturers increase technological innovation to improve the magnetic performance obtained at high frequency and high magnetic flux density (BS), and the miniaturization of capacitors is also a key technology.
Popular Product: 120v indicator light