The micro switch, as the name implies, is a switch that can switch electrical appliances only by lightly touching. This kind of switch is now widely used in computer mouse, communication equipment and so on. The type of micro switch is very wrong, and there are many precautions for use. This article will introduce those things about micro switches, and of course also include the question of what is the use of micro switches.
1. What is a micro switch
A micro switch is a contact mechanism that has a small contact interval and a snap-action mechanism, and uses a specified stroke and a specified force to switch action. It is covered by a shell and has a drive rod outside of it. Because the contact distance of the switch is relatively compared Small, hence the name micro switch, also called sensitive switch. The electrical text symbol is: SM.
Second, what is the use of the micro switch
The external mechanical force acts on the action reed through the transmission elements (press pins, buttons, levers, rollers, etc.). When the action reed is displaced to the critical point, an instantaneous action is generated, making the moving contact at the end of the action reed and the fixed contact Click to quickly turn on or off.
When the force on the transmission element is removed, the action reed produces a reverse action force. 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 contact distance of the micro switch is small, the action stroke is short, the pressing force is small, and the on-off is rapid. The speed of the moving contact has nothing to do with the speed of the transmission element.
Mainly used on the switches of some original electrical appliances, such as computer mice, car mice, automotive electronic products, communication equipment, military products, testing instruments, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, floating ball equipment, Medical equipment, building automation, power tools, general electrical and radio equipment, 24-hour timers, etc.
3. Types of micro switch
There are many types of micro switches. There are hundreds of types of internal structures. They are divided into ordinary, small, and ultra-small according to the volume; according to the protection performance, there are waterproof, dustproof, and explosion-proof; according to the breaking type, there are Single type, double type, multi-connected 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 disconnect); according to the breaking capacity, there are ordinary type, direct current type, micro current type, and large current type. According to the use environment, there are ordinary type, high temperature resistant type (250℃), super high temperature resistant ceramic type (400℃)
The basic type of the micro switch is generally without auxiliary pressing attachment, and derives a small stroke type and a large stroke type. Different auxiliary pressing accessories can be added according to the needs. According to the different pressing accessories added, the switch can be divided into various forms such as button type, reed roller type, lever roller type, short boom type, and long boom type.
Micro switches are used for automatic control and safety protection in equipment that requires frequent circuit switching. They are widely used in electronic equipment, instrumentation, mining, power systems, household appliances, electrical equipment, as well as aerospace, aviation, ships, missiles, and Military fields such as tanks have been widely used in the above fields. Although the switch is small, it plays an irreplaceable role.
At present, micro switches on the market in China vary from 3W times to 1000W times depending on the use requirements, generally 10W, 20W, 50W, 100W times, 300W times, 500W times, 800W times, and generally use beryllium Bronze, tin bronze and stainless steel wire make reeds.
The application of the micro switch is very wide, and the use of the micro switch greatly facilitates people's lives and makes our life better. If you need to install a micro switch in your home, you must pay attention to the items mentioned in this article when you use it.
JIALONG Electron Co.,Ltd is one of largest switch manufacturers in China. Our company was established in 1986 as we mainly manufacture slide switch,rocker switch, micro switch, push button switch, tact switch, DC jack, AC power socket and automotive switch. with over 1000 different types of our standard switches, most of our switches have been approved by UL, CUL, VDE, TUV, KC, CE, CQC and other approval. the JL brand has achieved global recognition in various sectors.