Keyboard device

A keyboard device, comprising:

• a substrate;
• and
• a plurality of keycaps disposed on the substrate;
• wherein the substrate comprises a long slit and an elastic bridge component, and the long slit divides the substrate into a first plate and a second plate;
• the first plate has a first side edge, and the second plate has a second side edge;
• the first side edge and the second side edge are opposite to each other, and a gap is between the first side edge and the second side edge;
• the elastic bridge component is connected between the first side edge and the second side edge, and the first plate is movable relative to the second plate;
• wherein the first side edge comprises two first bridge connections respectively extending toward the second side edge, and the second side edge comprises two second bridge connections respectively extending toward the first side edge;
• wherein the elastic bridge component comprises a first elastic bar, a second elastic bar, and a connecting member, the first elastic bar is connected between the two first bridge connections, the second elastic bar is connected between the two second bridge connections, and the connecting member is connected between the first elastic bar and the second elastic bar.