Film switches are an all-in-one operating system integrating 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 and contacts the lower circuit's plate, completing the circuit. Upon releasing the finger, the upper circuit contact bounces back, breaking the circuit and triggering a signal. The film switch features a strict structure, attractive appearance, and good sealing properties. It boasts a long service life and is widely used in industries such as electronic communication, electronic measurement instruments, industrial control, automotive industry, smart toys, and home appliances.