Film switches are an integrated operating system combining key functions, indicator elements, and instrument panels. They consist of four parts: the panel, upper circuit, insulation layer, and 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, which triggers a signal. Film switches have a strict structure, an aesthetically pleasing 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.