What does switch bounce mean?

Because of its physical characteristics, some mechanical switches will bounce many times at the moment of closing before they are closed stably. Because the rebound distance of the switch every time is very small, it can't reach the arc extinguishing distance, so the switch is in a state of continuous arc drawing during the whole rebound process, which will lead to serious ablation of the switch contact and even failure of the switch welding.

Therefore, accurately testing the bounce state of the switch at the closing moment and analyzing and comparing the switch bounce characteristics of different structures can help structural engineers to choose the best switch structure and the most appropriate component parameters, improve the switch bounce characteristics, and reduce the switch damage or even failure caused by switch bounce and arcing. In other words, it can help structural engineers optimize the design of switches.