Terminal springs are precision spring components that ensure reliable electrical contact and connection reliability in electrical circuits. They are required to possess conductivity, elasticity, and corrosion resistance, making them indispensable elements in a wide range of electronic devices and electrical components such as connectors, switches, relays, battery terminals, and various sensors. Primary materials include beryllium copper and phosphor bronze, and surface plating treatments such as gold, silver, nickel, or tin are applied to reduce contact resistance and improve corrosion resistance. For manufacturing, progressive die stamping and precision bending are primarily used. In modern electronic components, where miniaturization and high-density integration are advancing, their design and processing technology are extremely important.