Switches are very common in our daily lives, as they can control the start and stop of various electrical equipment. A touch switch is actually a button switch that is widely used in household appliances such as televisions and computers. Applying pressure on this switch can achieve switch control of electrical appliances, which is very convenient. However, many people do not have much understanding of this, How does such a small switch work in a circuit? Next, let's briefly introduce the knowledge of touch switch circuits.

With the development of various electrical appliances, the demand for touch switches in China is constantly increasing. The most commonly used fields of this type of switch are various digital electronic products and instruments. For example, our TV sets have 6 touch switches, and a set of combination audio systems requires 20 touch switches.

There is still a big difference between a touch switch and a traditional switch. It is just an electrical component that must be combined with the corresponding electronic product to function. Moreover, it is mostly assembled inside the product and is not easily visible, but it is essential for the use of electrical appliances.

A light touch switch is generally composed of normally open contacts and normally closed contacts. When a pressure test is conducted towards the normally open contact, the circuit of the light touch switch will be in a connected state, and the pressure relief will restore to the normally closed contact, thus achieving circuit disconnection. Since the light touch switch has such a great effect on us, it is necessary to ensure that the quality of the selected product is qualified in order to have a good trial experience, How do you choose high-quality touch switches?

Firstly, from the perspective of the pin substrate, high-quality light touch switches are made of brass or phosphor copper, and in order to reduce contact resistance, the pins are also silver plated, which directly affects the solderability and contact resistance of the switch.

The contact point structure of a switch is a very crucial structure, because light touch switches control electrical appliances through these contact points. Generally speaking, the larger the contact surface of the contact point, the better, and the contact surface is determined by the structure of the switch. There are three types of structures on the market, the highest quality being "O-type contact", followed by "2-point contact" and "1-point contact", which are relatively poor.

As we all know, many switches become insensitive or even unusable after prolonged use. The service life of a light touch switch is mainly determined by its stroke and shrapnel, resulting in a shorter lifespan. In fact, these internal structures are difficult to inspect, and the cost can be intuitively determined by the product's qualification certificate, considering quality from aspects such as appearance and feel.

From the above introduction, it can be seen that touch switch circuits are very common in our daily lives. This type of switch plays a great role in controlling electrical equipment. If you need to purchase it, you must ensure quality. We hope these contents are helpful to you.

Source: Fangtianxia Information