What is micro switch?

 

Micro Switch Definition

A micro switch has a small contact interval and a snap-action mechanism and uses a specified stroke and a specified force to perform switching operations. It is a switch that covered by a shell and has a drive rod outside. Because of the small contact distance, we not only call it a micro switch but also call it a sensitive switch or snap action switch.

The micro switch is composed of 5 major types of constituent elements. The contact distance is small and the torque is large, which is the most obvious characteristic of the switch. Generally, there is a drive rod outside.




Micro Switch Working Principle

The external mechanical force acts on the leaf spring through the transmission elements, such as press pins, buttons, levers, rollers, etc. When the leaf spring is displaced to the critical point, then the end of the spring leaf and the fixed contact point will turn on or off quickly. And, when the force on the transmission element is removed, the spring leaf produces a reverse action force to push it back. Then the reverse action complete.

5 Way to classify microswitch on the market

There are many types and internal structures of micro switches. So we need to learn how to classify.

Firstly, People can divide into ordinary, small, and ultra-small from the volume. Generally, the size is under 27.8mm(L), 10.3mm(W), and 15.9(H) is the mini type. The size is in 19.8mm(L), 6.4mm(W),10.2mm(H) is the sub-mini type. And the size is in 12.8mm(L), 5.8mm(W), 6.5mm(W) is ultra-miniature micro switch types. Yes, they just your reference.

Secondly, if according to the protection performance, there are waterproof microswitch, dustproof, and explosion-proof;

Thirdly, if according to the breaking type, there are Single type, double type, multi-connected type.

Fourthly, according to the breaking capacity, there are also have ordinary type, direct current type, microcurrent type, and large current type according to for options.

Fifthly, on the basis of its working environment, the switches have ordinary, heat-resistant (250℃), and heat-resistant ceramic types.

Finally, the other classification method such as lever type, waterproof level, and so on.

The Application for Snap Action Switch

It has been widely in electronic equipment, instrumentation, mining, power systems, household appliances, electrical equipment, as well as aerospace, aviation, ships, missiles, tanks, and other military fields. Although the switch is a small part of the machinery, it really plays a very important role in the system.

Usually, the different applications have different requirements for the switch. For example, the mechanical life is from 30000 to 10000000 cycles which can fit for different applications.

Such as a computer mouse, car mouse, automotive electronic products, communication equipment, military products, testing equipment, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, floating ball equipment, medical equipment, building automation, electric Tools and general electrical and radio equipment, 24-hour timers, etc.

The Brands of Micro Switch Compay

As we all know, the Honeywell, Omron, Marquardt, Cherry, Panasonic, Burgess, and so on. In China, the leading brand of microswitches is Zing Ear and Toneluck. Zing Ear has been established in 1983 and Toneluck in 1973, and have a lot of experience with Micro Switch R&D. So the quality of these 2 brands is good enough for you.

https://www.grandye-switch.com/what-is-micro-switch/

评论

发表评论

此博客中的热门博文

How to replace micro switch on shift lever?

图片
  A shift lever microswitch is used for signalization in a car shift system. Today, I will use  Cadillac SLS  as an example to show you how to replace the micro switch on the shift lever Firstly, in order to operate easily, we need to take the whole shift system off the car to the ground. Like the picture show. Because of the invisible screws, we need to unload carefully or may damage your parts inside. Secondly, find where the micro switch is. Open the shift lever inner structure, you can see a 2 solder terminal micro switch wiring with cable. Let look carefully, we can know the rating of this item is 0.1A, 5E4, and T120. This is why I say the micro switch is only for signalization in the car system. Then, take it off with a soldering iron. Thirdly, solder a new switch to replace the old one. Fourthly, do the re-installment. Meanwhile,  if you want to use another brand switch to replace it. You need to make sure most of the  parameters are the same as the primary switch and do some t
阅读全文

What does off on on a micro switch mean?

图片
  What is a micro switch? If you need to recognize what does it means you need to understand  what’s micro switch  first. I had uploaded an additional article to inform the mini is. In fact, the micro switch additionally calls snap-action switch that is an electrical button that is activated by very little operating pressure, through the use of a tipping-point device to regulate the circuit. For even more information, please see the short article. Generally, there at least 3 types of circuit codes to control the micro switch “ON” or “OFF”, and different types have different requirements for wiring. An SPDT microswitch “OFF” and “ON” means The  SPDT  is a snap action switch with single pole dual toss and these buttons have 3 terminals or 3 wires to connect usually. They control the circuit “ON” as well as “OFF” in the CON, NC, and NO terminal of the circuit respectively. In fact, an SPDT button can regulate 2 loopholes at most. For example, A, B, and also C, C is the con terminals. A c
阅读全文

What are microswitch with audible click

图片
We are not difficult to find that there 2 types of microswitch on the market. One of them is a silent switch and another one is an audible click switch. The easiest to identify is whether it can hear the sound when to be pressed and released. For example, when you use a mouse to click the right or left mouse button that is what we talk about the micro switch with an audible click. However,  they are quite different in internal structure. From the attached picture below, we can see the actual difference and can classify into 3 types, which including leaf spring, spring, and clip types. And the leaf Spring and Spring types belong to audible click switch while clip type switch belongs to the silent microswitch . So, what are microswitch with an audible click? In fact, the audible click sound from a micro switch is because the contacts strike on each other. Generally, the bigger size, the louder. Zing Ear  G5 ,  G6 ,  G10 ,  G5W11 ,  and G9 series are the micro switch with an audible clic
阅读全文