Material and Process: Typically manufactured from SUS301 or SUS304 stainless steel, with surface treatments such as nickel plating, silver plating, or gold plating to enhance conductivity, oxidation resistance, and wear resistance.
Shape and Specifications: Available in various forms, commonly including cross-shaped, triangular, and circular designs. Diameters generally range from 4mm to 20mm, with actuation forces between 100g and 1000g, customisable according to walkie-talkie design requirements.
Operating Principle: The metal spring contact is positioned above a conductive area on the walkie-talkie's PCB or FPC circuit board. When pressed, the contact's central point depresses, making contact with the circuit board's trace to form a circuit, allowing current flow and enabling the key function. Upon release, the spring plate returns to its original shape via its inherent elasticity, breaking the circuit.
Primary Functions: Firstly, it establishes electrical connections, ensuring button presses are accurately converted into electrical signals to execute walkie-talkie functions such as transmission, reception, and channel switching. Secondly, it provides tactile feedback, enabling users to feel distinct resistance when pressing buttons to confirm effective actuation, thereby enhancing operational experience.
Performance characteristics: Exhibits high sensitivity, extended service life, and low contact resistance. Typically designed for millions of press cycles, ensuring reliable and stable key operation throughout the walkie-talkie's prolonged usage.
