We can see various types of switches in our daily lives. I don't know if you have ever heard of touch switches. Touch switches are literally a type of switch that can change the state of a switch with just a touch. However, this is not the case. Today, I can introduce you to what a touch switch is and its structure, principle, and classification.

A touch switch, also known as a button switch, is a type of switching component in a circuit. A light touch switch will close under external force to form a conductive state, and will be in a disconnected state when there is no external force. It has many advantages such as diverse specifications, high accuracy, and low resistance. So it is widely used in household appliances, some digital appliances, communication products, computer products, and some audio and video products.

Light touch switches can be divided into two different types based on their principles. One is to use metal springs to achieve free switching between the on and off states of the switch. This type of contact switch feels very good. When we press the button to a certain extent, we can hear a clicking sound, and the operation is completed. Another method is to use conductive rubber to switch between the on and off states of a light touch switch. This type of switch also has a good touch, but the contact resistance is relatively high, about 10000 times that of the previous switch.

The light touch switch structure can be mainly divided into five parts: cover plate, button, spring, base, and pin. The button is the place where we apply external force, and the spring is a key component in the light touch switch. The connection and disconnection of the switch depend on the force changes of the spring. Pins are the connection between a light touch switch and a circuit, usually consisting of four pins, one in two, and the other used for grounding. Once the light touch switch is subjected to force, the four pins will conduct each other to achieve circuit connection. When the switch is not properly applied, the four pins will not be connected between the two pairs, and the circuit will be in a closed state.

The principle of lightly touching a switch is also very simple. When we press the button, its spring will deform due to the elastic force and come into contact with the solder, successfully connecting the four pins in the switch, thus achieving circuit connection. When we evacuate the external force, the shrapnel will return to its original state, and the pins will not be connected, so the circuit will be in a closed state. The above is the knowledge introduced to you about what a touch switch is, as well as its structure, principle, and classification. You can refer to it for reference