Micro switches are switches with tiny contact intervals and snap-action mechanism, whose working principle is based on mechanical movement and electrical conduction principle. Through the external mechanical force acting on the transmission element, the force is transferred to the action reed, when the displacement of the action reed reaches a certain critical point, it will instantly complete the action, so that the action reed end of the movable contact and the fixed contact is quickly connected or disconnected, so as to realize the control of the circuit.
There are many kinds of microswitches, according to the volume can be divided into ordinary, small, ultra-small; according to the breaking form can be divided into single-connection type, double-connection type, multi-connection type; according to the protection performance can be divided into waterproof, dustproof, explosion-proof; according to the breaking capacity can be divided into ordinary, DC, micro-current type, high current type; according to the use of the environment can be divided into ordinary, high-temperature-resistant (250 ° C), ultra-high-temperature-resistant ceramic type (400 ° C); According to the pressure auxiliary switch can be divided into button type, reed roller type, lever roller type, short arm type, long arm type and so on.
Microswitches are widely used in a variety of electronic equipment, control systems and various types of instruments, such as computer mice, household appliances, automotive electronics, communication equipment, test instruments and so on. Its main role is to realize the electrical isolation and logic protection function, but also can be used for position detection and control, sequential action control function and interlock protection.
When using microswitches, some matters need to be paid attention to, such as fixing the switch body with appropriate small screws and ensuring that the fixing torque of the screws is within the specified range; in the free state, the force cannot be applied directly to the button or the exciter but should be applied in the vertical direction; the action setting of the microswitches should be based on certain standards, avoiding to set them directly at the position of the action limit; when soldering microswitches, a proper soldering iron should be used and the operation should be completed in a short time.
Overall, although small but powerful, microswitches are important and indispensable components in modern electronic equipment. For more information about microswitches, it is recommended to refer to the relevant electronic components manual or consult a professional electrical engineer.
Translated with DeepL.com (free version)