The manufacturer of the light touch switch explained that genuine materials are generally PC materials imported from abroad, with a smooth surface, soft touch, and free 90 degree bending without breaking. They also have a shock absorption system to ensure that the product can reach its service life even after repeated switching and plugging. All function keys are molded in one go.

The fake material not only has many rough edges, but also when I picked up the socket panel and smelled it, a strong pungent smell came over my face. Experts say this is the odor emitted by inferior flame-retardant nylon materials. This inferior material contains harmful substances and the odor persists for a long time. Please choose a website manufacturer with a formal sales license record. Additionally, you can call or log in to the website to inquire about the required specifications.

The manufacturer of the light touch switch explained that the poor contact of the switch, and we said that the pins or terminals were not oxidized, which is visible to the naked eye. In fact, metals exposed to the air will definitely be oxidized to varying degrees, and the degree of oxidation is closely related to the metal material, environmental conditions, and storage time. The coating of gold plating is considered to be relatively resistant to oxidation, and in fact, gold is not completely non oxidized, but rather has a relatively lower degree of oxidation. Other coatings are easily oxidized.

So, in general, what we judge with the naked eye as' no oxidation 'simply means that oxidation is not very severe. In fact, oxidation exists objectively. Metal oxides are non-conductive. So, certain areas on the surface of these pins or terminals have already distributed a certain amount of oxide layer, which further reduces the actual effective contact surface. Therefore, the manufacturer of the light touch switch explained that when the surfaces of the two contacts come into contact, there is indeed a staggered contact between the uneven surfaces. In some places, the convex and convex surfaces may come into contact, while the concave surfaces may not come into contact with the other party's surface. Of course, there are also cases where the convex part is embedded into the concave part of the other party, but generally due to the fact that the shape and size of the convex and concave parts cannot completely match, the embedding is only a departmental contact. So, the contact between metal surfaces that appear to be in close contact on the surface is actually between uneven surfaces. Its truly effective contact area has been greatly reduced. Of course, when two surfaces come into contact, the pressure between the contact surfaces can have an impact on the contact condition.

When the pressure is high, it can cause the two surfaces to embed deeper into each other. At the same time, some protrusions deform under pressure, becoming less prominent, making it possible for shorter areas near them to come into contact. According to the analysis of the manufacturers of SMD touch switches, the magnitude of pressure ultimately affects the actual effective contact area between surfaces. In addition, between the surfaces that are actually in contact with each other, the spacing between the atoms of two metals is pressed very close (even when the pressure is higher, the atoms may embed into each other), allowing for the exchange of electrons and thus conducting electricity.

Source: http://www.szsgjy.com/html/article_228.html