Thin plate springs are components that utilize the elastic properties of thin metal sheets, formed through plastic deformation, to perform functions such as holding, fixing, electrical conduction, and vibration absorption. They are primarily manufactured using press working (blanking, bending, drawing), and for more precise shapes, etching or laser processing may be employed. Commonly used materials include stainless steel, phosphor bronze, and beryllium copper, with the optimal material and heat treatment selected according to the application. They are widely used in fields requiring space-saving and high reliability, such as connectors and switches in electrical and electronic components, automotive parts, precision instruments, and medical devices. Due to their high design flexibility, they also play an important role as multi-functional components.