I. Introduction
Micro switch is a small mechanical switch, mainly used in electronic equipment, control systems and various instruments. Due to its small size, high sensitivity, and reliable action, micro switches are widely used in many fields. This article will introduce in detail the definition, working principle, classification and application of micro switches.
2. Definition of micro switch
A micro switch is a small mechanical switch that controls the on and off of a circuit through tiny mechanical movements. Due to its small size, light weight, high sensitivity, and reliable action, micro switches are widely used in many fields. It can be used in electronic equipment, control systems and various types of instruments to achieve functions such as automatic control and signal detection.
3. Working principle of micro switch
The working principle of micro switch is mainly based on the principle of mechanical movement and electrical conduction. When external force acts on the button or lever of the micro switch, the mechanical structure undergoes slight displacement or deformation, thereby triggering the contact to close or open, thereby realizing the opening and closing of the circuit. The contacts of micro switches are usually made of metal sheets, graphite or other conductive materials to ensure good conductivity and stable contact.
4. Micro switch classification
Micro switches can be divided into many types according to different classification standards. According to the working principle, micro switches can be divided into two types: normally open type and normally closed type. When a normally open micro switch is not acted upon by an external force, the contacts are in an open state; when a normally closed micro switch is not acted upon by an external force, the contacts are in a closed state. According to the installation method, micro switches can be divided into two categories: direct plug-in type and surface mount type. In-line micro switches can be directly inserted into the printed circuit board; surface mount micro switches are suitable for surface mount technology and can be directly mounted on the printed circuit board. In addition, according to the number of contacts, micro switches can be divided into types such as single pole single throw, single pole double throw, double pole double throw and double pole single throw.
5. Micro switch application
Because micro switches have the characteristics of small size, high sensitivity, and reliable action, their application range is very wide. In the field of industrial automation, micro switches can be used to control equipment on the assembly line, detect the position and quantity of materials, etc.; in the field of communications, micro switches can be used in optical signal branching and combining in optical fiber networks, optical cable monitoring systems, etc.; in the In the field of security monitoring, micro switches can be used for safety monitoring equipment such as smoke alarms and door and window alarms; in the field of medical equipment, micro switches can be used to control and detect medical equipment such as ventilators and sphygmomanometers; in addition, in automotive electronics, It is also widely used in aerospace and other fields.
6. Conclusion
As a small mechanical switch, micro switch has the characteristics of small size, high sensitivity and reliable action, and is widely used in various fields. Understanding the working principle and classification standards of micro switches will help you better select and apply suitable micro switches. With the continuous advancement of technology and the growing demand for applications, it is believed that micro switches will play an even more important role in the future.