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