Touch switch is also called key switch, English Name: touch switch, TCAT switch. Generally, it is called by its overall size: for example, 6 * 6 * 5 is its length, width and height. Belongs to a kind of electronic switch, and the home wall switch is different. The difference lies in the application of different fields and their own structure and role is also different, so called electronic switch. Divided into: push type and surface mount touch type. The difference between the two types lies in the difference of volume and welding form. The push type is mainly plug-in type with larger volume, while the surface mounted touch type is mainly the SMT ultra-thin type. By pressing the handle to press the shrapnel, the contact stroke between the projectile and the shot point is conducted. Therefore, it can be divided into three forms: one is the normally open type, the other is the normally closed type, and the other is the double action type. There are also three kinds of switch positions: one is two leg switch, three leg switch, four pin switch and five pin switch.

 

Structure:

 

It is composed of plastic base, hardware terminal, metal spring, hardware cover, plastic handle, spring and PI film.

 

working principle:

 

Switch is one of the passive components, it can not be used alone. It can only form a set of control system with active components, and its function can be brought into play. The working principle of the normally open light touch switch: the switch can be turned on by pressing the switch button in the working time. When the button is released, the switch will be disconnected. The internal structure of the switch is realized by the force exerted by the metal spring piece. The principle of normally closed light touch switch: press the switch button to turn off the switch when working, and turn on the switch when the hand is released. According to the above two principles, it can be seen that this switch has two ways to select products according to our own product performance requirements. According to the working principle analysis, it can be seen that this product is also defective, it is broken by the force of metal shrapnel, so once the metal shrapnel loses its elasticity, the product cannot be used, so this product has a life limit.

 

Use:

 

According to the working principle of the product, we can use it to control the volume of sound, power button of various electronic products, function selection of various products, remote control button, computer keyboard and other electronic products. We can not do without it in our daily life. Its use is so extensive, the use of the environment is very much, a single product performance can not meet the market demand, extended products have also been developed, the current market: ultra-thin, waterproof, dust-proof, with support type, sink plate type, with lamp type, high-life type, super small, light-weight type, gravity type and other products. The variety of products is increasingly rich, and our market demand is more and more matching. It can be seen that the emergence of the light touch switch is indispensable to our development.