There are two principles of light touch switch
1. light touch switch principle according to the structure
Light touch switch is mainly divided into shrapnel, base, cover plate, button, pin five parts, the button here refers to the external force applied; Shrapnel is the key component of light touch switch, the switch on and off is caused by the change of shrapnel force; Pin is with lamp light touch switch and the circuit connection place, generally there are five pins, 221 groups, there is a pin used in ground effect, when pressed with a normal force, the four led JiaoXiang conduction makes the circuit conduction, and pressure switch without external force on the right, the four pin 221 groups is not same, when the circuit is in off state.
2. light touch switch principle according to classification
Light touch switch can be divided into two kinds according to the principle of different, one is the use of conductive rubber to complete the switch on the cut-off state switch, this kind of switch feel good, but the contact resistance is about 10000 times of the previous one; The other is the use of metal shrapnel to complete the switch on and off state switch, this kind of light touch switch feel good, press the button to a certain extent accompanied by the sound of ticking.
When we press the button with light touch switch, the spring deformation by the elastic effect of downward contact with the weld, so that the switch of the two sets of pins phase conduction, so that the circuit presents a state of conduction; When we withdraw the external force, the deformation of the shrapnel is restored to its original state, and the two pins of the switch are no longer on, so that the circuit presents a cut-off state.
