What is the difference between the working principle of the light touch switch and other key switches? With the development of society and demand, people's living standards are gradually improving, science and technology are improving, and the vigorous development of electronic products is derived from the large demand for space for all consumer electronic products. Relatively speaking, the requirements for all aspects of products are getting higher and higher. Even some switches common in daily life require more and more precision. Although many switches have the same functions and functions, many people try to make their own more prominent and special. Some of the original switches did not even have a switch logo, but now they not only have icon logos, but also have lights, which are easier to identify than ordinary ones and are more convenient and simple to use. The touch switch means that it can be activated by simply pressing it, and it does not need to be opened as hard as the original switch. When the light touch switch is allowed, there is an indicator light at the same time as the light touch switch can be turned on, so that you can know clearly whether the switch has been turned on.

T touch switch with light, as the name implies, a switch with a light (led light). There is a touch switch with four feet and two light feet. The touch switch with light is always commonly used in daily electronic component products., Relatively speaking, it occupies a large part. The four pins mentioned here refer to the four pins of the light touch switch. The four pins are two groups of switches. When pressed, the two groups are energized at the same time, while when released, the two groups are opened at the same time. Some people say that the four pins are for firm welding of the circuit board. In fact, there is nothing wrong with this understanding.

Whether it is a light touch switch or other touch switch, its working principle is relatively similar, partly due to the number of pins is not the same, the switch operation circuit is not the same, so the fundamental working principle has a certain difference. What is the difference between the light touch switch and other key switches? What is the working principle? The following three components to share with you.

The working principle of the light touch switch can be divided into two types:

1. Principle of light touch switch according to structure

The light touch switch with light is mainly divided into five parts: shrapnel, base, cover plate, button and pin. The button here refers to the place where the external force is applied. The shrapnel is the key component of the light touch switch with light. The on-off of the switch is caused by the change of elastic force. The pin refers to the connection between the light touch switch with light and the circuit. Generally, there are five pins, two in a group, and one pin for grounding, when pressed with normal force, the four pins are turned on to make the circuit conductive, and when the switch is not pressed by the correct external force, the four pins are not connected in two groups, and the circuit is in an off state.

2. The principle of light touch switch with light is classified as follows:

It is composed of a normally open contact and a normally closed contact. In a tact switch, the function of the normally open contact is that when pressure applies pressure to the normally open contact, the circuit will be turned on. When this pressure is removed, it returns to the original normally closed contact, which is the so-called disconnection. The force of this pressure is to use our hands to open and close the button.

② When the pressure is removed, the touch switch will be turned off, and the internal structure of the touch switch relies on metal shrapnel to protect the force and realize the connection and disconnection.

③ Light touch switch with light can be divided into two types according to different principles. One is to use conductive rubber to switch the on-off state of the switch. This type of switch feels good, but the contact resistance is large, which is about 10000 times of the previous one. The other is to use metal shrapnel to switch the on-off state of the switch. This type of light touch switch with light feels good, the button is pressed to a certain extent accompanied by a ticking sound.

The principle of the light touch switch with light is as mentioned above. It is originally the same as the principle of the general light touch switch. The difference is that the indicator light should be on when the light touch switch is turned on, and the indicator light will subside when it is turned off. No matter what kind of structure of the tact switch, the tact switch has four pins in common. The advantage of the four-pin tact switch over the ordinary tact switch is that it can be soldered firmly, and everyone can use the tact switch to adjust and operate accurately.