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Introduction to the principle of silicone tact switch?

Release time：

2022-07-14 13:35

Everyone is familiar with silicone tact switches. Because there are many knowledge points involved before use, as a manufacturer, we have compiled some introductions to the principles of silicone tact switches. If you are interested, please stay and have a look, and hope to help relevant people. Those who want to buy this product can also contact us.

Silicone tact switches have many functions. Of course, this is also because after continuous improvement, its advantages are reflected in different places. Silicone tact switches are constantly improving in terms of development and functional requirements, but their basic structural principles have not changed. The structure of the silicone tact switch is generally composed of a key cover, a return spring, a bridge moving contact, a static contact, a column connecting rod and a shell. The button is in a state of opening and closing without external force (ie static) when it is in contact, and it is divided into a start button, a stop button and a compound button. So you can go to the start button when you are using it. When the button cover is pressed, the contacts are closed, and when released, the contacts automatically open and reset. Conversely, when the button stops, the contacts separate when the cover is pressed, and automatically close and reset when released. When the button cover is pressed, the bridge moving contact moves downwards, first opening the normally closed contact, and then closing the normally open contact. At this time, it is also necessary to release the button cover first, the normally open contact is first disconnected and reset, and then the normally open contact is closed and reset. This is just the usual push button switch. In fact, there is an electromagnetic adsorption device in it. When you press the button, the electromagnet inside produces magnetism that represents electricity.

In such a case the electrical circuit is then connected or disconnected by this suction device. Thus, the remote control function of the line is realized. To reduce the contact resistance of the silicone touch switch, the pins are basically silver plated. SO2 gas in the air will oxidize, which directly affects the solderability and contact resistance of the switch. Therefore, the thickness of the silver plating of the pins is the first step in realizing a high-quality side-contact switch. The silver plating process is controlled in place. A key factor affecting the reliability of conductivity is the structure of the contact point. Since the function of the touch switch is the contact conduction between the contact point and the shrapnel, the larger the contact surface, the better the contact surface. The contact surface is determined by the structure, and the contact is determined by the combination of the stroke of the touch switch and the shrapnel. The shorter the stroke, the lighter the sound life. In the case of fixed shrapnel, the service life of the tact switch is mainly determined by the stroke or sound. In addition, the key factor that determines the life of the grenade is the punching technology. A good side contact switch is also very important to the life of the entire product. Such as computer keyboards, etc. If the side impact switch is not good, it will lose elasticity, fatigue and metal shrapnel failure after frequent triggering. Therefore, attention should be paid to the selection of the side impact switch. The quality of the side pressure touch switch directly affects the quality factors, which mainly depend on the feel, protection, solderability, service life, conductivity reliability, production process and other factors of the side pressure touch switch.

The content of the above article is to introduce the principle of silicone tact switch to friends. If you see a friend, you can read it carefully. Of course, there is a lot of information about it. We will continue to update in the future. If there is something you don't understand, you can always ask for advice.

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Silicone Tact Switch

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