First, the touch switch principle - - Introduction
Touch switches, the English name for Touch switch, also known as key switch is a switch circuit components. Touch the switch at the desired external force closure conduction in the conduction state, when no external force is in the off state, with specification diversification, high precision, low contact resistance, etc., are widely used in household appliances, digital products , communications products, computer products, audio and video products and other electronic devices.
Second, the touch switch principle - - Categories
Accompanied by a ticking sound when you touch the switch can be divided into two types according to different principles, one is the use of metal shrapnel to complete the switch is turned off, the kind of touch switches feel good, press the button to a certain extent ; another is accomplished using a conductive rubber switch is turned off, and such switches feel good, but the contact resistance, about 10,000 times on one.
Third, the touch switch principle - - Structure
Touch switch structure as it can be divided into doors, buttons, shrapnel, the base, the pin of five parts, which button refers to the force applied at; shrapnel touch switch is a key component, the on-off switch is to rely on shrapnel caused by the force of change; pin means that coupling of the touch switch and the circuit, usually five pins, pairwise one group, there is a pin for the ground effect, when the switch is correct force four pin phase conduction makes the circuit is turned on, and the switch when it is not properly external pressure, a group of four pins pairwise not the same, so that the circuit is in the OFF state.
Fourth, the touch switch principle
When we press the button tact switch, its shrapnel deformed downward by the elastic force of the contact with the lug, so that the switch of two pin phase conduction, so that the circuit is rendered conductive state; and when we evacuate force , shrapnel deformation to restore the original state, from the lug, switch two pins does not get turned, so that the circuit is rendered off.