Illuminated pushbutton switches are control switches operated by fingers or palms, featuring indicator lights and spring-return reset functions. They consist of contact elements, operating mechanisms, and indicator lights (typically single) [2]. Based on operating methods, they are categorized into push-button, rotary knob, pull-button, and push-pull types. Actuator shapes include flat, convex, concave, and mushroom buttons. Mounting options cover front-panel and rear-panel installations. Protection types include open and protected designs; some models incorporate waterproof covers with elastic snap-fit structures to form sealed cavities, achieving IP protection ratings [3].
Primarily applied in industrial automation control systems, medical equipment, and instrumentation, these switches serve as core operational components in industrial control panels [2-3]. Product parameters include AC ratings (AC-15: 36V/10A to 660V/1.8A) and DC ratings (DC-13: 24V/4A to 440V/0.6A). Certain models feature replaceable LED beads, with circuit on/off control achieved through the contact separation mechanism between the bow spring and conductive components.