A tiny snap-on or signature snap-on, also commonly referred to as a microswitch, is an electronic switch that is activated by very small, typically very light, physical force, via a feedback system, sometimes referred to as an over-center mechanism. This switch can be used in various applications, including lighting and safety applications, application specific interface controls (ASIC), permanent electronic switches (PES), relay switches and keypads. Microswitches are used extensively in embedded computers and other electronic devices to provide short-to-intermediate communication between components. They can be used for security measures and as an indicator or control method for several applications including industrial automation systems, personal computer applications, wireless devices and medical equipment.
The micro switch works on two principles: physical contact energy. The actuator provides physical contact or contacts which are used to make electrical contacts, such as terminals, connectors, leads, wires and sockets. The contacts are made via mechanical rollers and contacts are made via a T-nut. Electrical contacts are typically metal or plastic insulators with an external shell or cover. Some micro switches have an external shell with two or more metallic strips along the insulating edges of the actuator.
There are two types of micro switches - a straight spring and a curved spring. The straight spring is generally more reliable than the curved spring because the mechanical components are arranged in a straight way in the case of a straight spring. The straight spring has an external spring that is compressed or stretched by an upward force, and this mechanical force acts to keep the contacts closed as long as the actuator is in operation. If the force on the actuator is sudden, the spring breaks, releasing the mechanical force along with the spring. In a curved spring, the mechanical force is kept in constant tension, and when the upward force is suddenly released, the spring bent and breaks.
There are many different uses for a میکروسوئیچ- household applications and industrial applications. In the household, these switches can be used to activate lighting and appliances such as stoves, televisions and washing machines, and to turn off power to outlets. In the industrial sector, these switches can be used in proximity sensors to detect when people cross a threshold, to activate locking devices in buildings and to remotely control security alarms.
Microswitch applications in the home and office can range from a single contact device for a light switch to complete automation systems. For example, if someone in your household wants something lighted, push button switches can be used to activate lamps or other electrical contacts, and push button switches can also be used to turn on and off fans. If someone in your office wants to control the television, there are remote access switches that allow you to control the television by either pushing a button or using a thumbstick. Likewise, if you want to activate or deactivate any electrical contacts in your building, you can use micro switches with an electrical outlet diagram.
Microswitch actuators are generally made out of either steel or brass. Steel microswings are more reliable because they have a greater upward force than brass or steel, and they also resist rusting. The most common style of microswitch is a flat spring, because the flat spring moves downward and snaps into place against the electrical contacts.
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