Film switches are an integrated operating system that combines key functions, indicator elements, and instrument panels. They consist of four parts: the panel, upper circuit, isolation layer, and lower circuit. When the film switch is pressed, the upper circuit's contact deforms downward, making contact with the lower circuit's plate and conducting electricity. Upon releasing the finger, the upper circuit contact bounces back, breaking the circuit and triggering a signal in the loop. The film switch has a strict structure, an attractive appearance, and good sealing properties. It features a long service life and is widely used in electronic communication, electronic measurement instruments, industrial control, automotive industry, smart toys, household appliances, and other industries.