Micro switch circuit diagram. Micro switch diagram. Micro switch function principle. Micro switch schematic. Micro switch structure diagram. Micro switch use instructions. Micro switch use method. Micro switch solution
The working principle of the micro switch is: the external mechanical force acts on the action reed through the transmission component (by pin, button, lever, roller, etc.), and when the action reed is displaced to the critical point, an instantaneous action is generated, so that the end of the action reed The moving contact and the fixed contact are quickly turned on or off. When the force on the transmission component is removed, the action reed generates a reverse action force, and when the reverse stroke of the transmission element reaches the critical point of the action of the reed, the reverse action is instantaneously completed. The micro switch has a small contact pitch, a short stroke, a small power, and a fast switching. The speed of the moving contact is independent of the speed of the transmission element.
There are many types of micro-switches, and there are hundreds of kinds of internal structures. They are divided into ordinary type, small size and ultra-small according to the volume. According to the protective performance, there are waterproof type, dustproof type and explosion-proof type. There are single type, double type, and multiple type. There is also a strong disconnect micro switch (when the reed of the switch does not work, the external force can also make the switch open); according to the breaking capacity, there are common type, DC type, micro current type, high current type . According to the use environment, there are common type, high temperature resistant type (250 ° C), ultra high temperature resistant ceramic type (400 ° C) micro switch is generally based on the non-assisted press attachment as the basic type, and derived a small stroke type, large stroke type. Different auxiliary pressing accessories can be added as needed. According to different pressing accessories, the button can be divided into button type, reed roller type, lever roller type, short moving arm type and long moving arm type. Micro-switches are widely used in electronic equipment, instrumentation, mining, power systems, household appliances, electrical equipment, as well as aerospace, aviation, ships, missiles, etc. in automatic switching and safety protection. In the military field such as tanks, Wuxi Innovation Switching Electric Co., Ltd. has been widely used in the above fields. Although the switch is small, it plays an irreplaceable role.
Micro-switch structure classification Photoelectric switch can be divided into three types according to the structure: amplifier separation type, amplifier built-in type and power supply built-in type. 1 Amplifier split type separates the amplifier from the sensor and is fabricated by an ASIC and a hybrid mounting process. Due to the ultra-small and multi-variable characteristics of the sensor, the amplifier has many functions. Therefore, this type uses the terminal block connection method, and can be used for AC and DC power supplies. With on-off and off-delay function, it can set bright and sound-changing switch, can control 6 kinds of output states, and has two output modes: contact and level. 2 The built-in amplifier is a combination of amplifier and sensing. It is fabricated by ASIC and surface mount technology and operates with DC power. Its response speed situation and the ability to detect small and high-speed moving objects. Change the polarity of the power supply to switch between bright and dark, and set the self-diagnosis stable working area indicator. It has two output modes, voltage and current, which can prevent mutual interference and is very convenient in system equipment. 3 Power supply built-in type is the integration of amplifiers, sensors and power supply devices, using ASIC and surface mount technology. Generally, the AC power supply is used, which is suitable for replacing the contact type travel switch at the production site, and can be directly used for the high-power control circuit. You can also set the self-diagnosis stable working area indicator. The output is equipped with solid state relay or relay normally open and normally closed contacts to prevent mutual interference and can be installed tightly in the system. 3 Photoelectric switch working principle Small audio analog switch The modulated pulse generated by the oscillation circuit passes through the reflection circuit, and the light pulse is radiated from the light-emitting tube. When the object to be measured enters the range of the receiver, the reflected light pulse enters the phototransistor and demodulates the optical pulse into an electrical pulse signal in the receiving circuit, and then is amplified by the amplifier and synchronously gated, and then digitally integrated or The integration method eliminates interference, and finally the delay (or no delay) triggers the driver to output the photoelectric switch control signal. Photoelectric switches generally have good hysteresis characteristics, so that even if the object is shaken in a small range, the output state of the driver will not be affected, so that it can be kept in a stable working area. At the same time, the self-diagnostic system can also display the light-receiving state and stable working area to monitor the operation of the photoelectric switch at any time. 4 Characteristics of photoelectric switch series Photoelectric switch is the product of the development of modern microelectronic technology, and the upgrade of series infrared photoelectric switch. Compared with the previous photoelectric switch, it has its own remarkable features: it has self-diagnosis and stable working area indication function, which can timely inform the working status whether it is reliable; the anti-reflective, specular and specular photoelectric switch has the function of preventing mutual interference. Convenience
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