Types of microswitches
There are many types of micro switches, and there are hundreds of internal structures. According to the volume, there are ordinary, small, and ultra-small; according to the protection performance, there are waterproof, dust-proof, and explosion-proof types; Single type, double type, multi-link 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, DC type, micro-current type, and high-current type.
According to the use environment, there are ordinary type, high temperature resistant type (250℃), super high temperature resistant ceramic type (400℃)
Micro switches are generally based on unassisted pressing accessories as the basic type, and small stroke types and large stroke types are derived. Different auxiliary pressing accessories can be added according to the needs. According to the different pressing accessories added, the switches can be divided into various forms such as button type, reed roller type, lever roller type, short boom type, long boom type and so on.
In terms of size, there are small, super small, super small and so on. Functionally, it is waterproof. The most common application is the mouse button.
Small micro switch: The general size is 27.8 in length, 10.3 in width, 15.9 in height, and the parameters have different changes such as high capacity and low load.
Ultra-small micro switch: The general size is 19.8 in length, 6.4 in width and 10.2 in height, and it has different functions of high precision and long life.
Super miniature micro switch: The general size is 12.8 in length, 5.8 in width, 6.5 in height and 6.5 in height. This type has an extra-thin design.
Waterproof: A waterproof micro switch.
The external mechanical force acts on the action reed through transmission elements (pressing pins, buttons, levers, rollers, etc.). Instantaneous action occurs when the action reed is displaced to a critical point. The moving contact and the fixed contact at the end of the action reed are quickly connected or disconnected.
After the force on the transmission element is removed. The action reed produces the opposite action force. When the reverse stroke of the transmission element reaches the critical point of action of the reed. The reverse action is completed instantaneously. The contact distance of the micro switch is short, and the action stroke is short, and the on-off is fast according to the power. The action speed of the moving contact has nothing to do with the action speed of the transmission element.
The micro switch has a small contact interval and a snap action mechanism. A contact mechanism that switches on and off with a specified stroke and force. covered by the shell. It has a drive on the outside. And the shape is small. Micro switches are composed of five major categories of components.
Micro switches are used in many ways. Such as computer mouse, car mouse, automotive electronic products, communication equipment, military products. Test instruments, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, floating ball equipment, medical equipment, building automation, power tools and general electrical and radio equipment, 24-hour timers, etc.
1. The current and voltage used are relatively small, so it is best to use low-power circuit devices at this time, and it is best not to use copper wires, because there will be safety problems with electricity.
2. If the environment used is relatively humid or the temperature is relatively high, it is best to use composite silver gold-plated points.
3. When opening or closing, try not to be too large, and do not open or close frequently, otherwise the service life will be reduced.
4. When using, in order to prevent the screw from loosening and damage, it is best to use a washer, in this way, the device will be firmer and not easy to fall off.
5. The micro switches of electronic products are generally relatively small, and the internal structure is very precise. If the user uses too much force, it is easy to damage the precise structure. In addition, the switch cannot be pressed all the time. Such behavior will easily lead to They fail, and in subsequent use, the switch is not responsive enough.
