The components of the 4.5x4.5 light touch switch are the switch cover, plunger, pot blade, and base. The contacts and pins contained in the base also play an important role. Below, we will introduce each component separately.

Construction of the 4.5 by 4.5 touch switch with a patch: The switch cover is a component used to protect the internal mechanism, mostly made of metal, embedded in the base and fixed. Some products also have grounding pins to prevent static electricity.

The plunger is a component that is pressed when a person operates a switch, which can transmit the force received here to the pot. The shape of the operation part can be flat or protruding, and the main models have two types of products to choose from. The vast majority of plungers are plastic shaped products, but when increasing the operating stroke, rubber materials will be used.

In addition to the tactile function mentioned earlier, the pot shaped chip also serves as a movable contact point. The certain operating force on the plunger will cause the pot blade to sag, connecting the two fixed contacts and conducting the circuit. After the operating force is released, the pan will return to its original shape and the switch will become disconnected. There are two types of materials used for pot slices: metal and rubber. The former has a smaller operating range and can achieve a sharp touch; The latter has a longer operating stroke and can achieve a gentle touch.

The base is the basic component used to install the main components. The base is a plastic shaped product that integrates with metal contacts and pins during forming, using plastic materials that can withstand welding high temperatures.

The contacts and pins are very important components in the base. Two fixed contacts are connected to the pins on the outside of the extended switch. These pins are soldered together with the printed circuit board to electrically and mechanically connect the switch to the printed circuit board.

Patch 4.5 * 4.5 touch switch materials have different lifespan and shelf life, so people can take a look when using them. Generally speaking, their lifespan and shelf life are around 10 years, some even longer. Within 10 years, there is basically no aging phenomenon, but if it exceeds ten years, it is very dangerous. Plastic bases are also made of metal covers, which are also a common material. They use iron covers and stainless steel materials, both of which have a long service life. However, we should also remember to maintain them when using them. Using the correct maintenance method can bring many benefits and extend their service life, bringing great convenience to people's use. Salt mist cover plates are also quite common. Salt mist cover plates themselves are very useful, but their service life is not particularly long, usually around five years. If they do not rust, they may be longer, which is enough for us to use in daily life. Some people even replace them in three or four years.

SMD touch switches are still within the normal lifespan and shelf life, but there are also prerequisites. When using them, we need to prevent oxidation and try not to let them come into contact with air. Only in this way can we extend the service life and bring advantages to people's use. Of course, we can also use some small methods to extend the service life, that is, welding at the bottom to isolate air, which can have a very good effect and extend the shelf life.

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