Abstract: A key structure includes a baseplate, a keycap and a connecting assembly. The keycap includes a plurality of first pivot portions and a plurality of sliding slots. The connecting assembly includes a first outer frame, two first inner frames, a second outer frame and a second inner frame. The first inner frames are disposed in two accommodating portions of the first outer frame. Two sides of the first outer frame are respectively connected to part of the sliding slots and the baseplate. Two sides of the first inner frame are respectively connected to the first pivot portion and the base plate. Two sides of the second outer frame are respectively connected to part of the sliding slots and the fixing side. Two sides of the second inner frame are respectively pivoted to one of the first inner frames and the base plate.

Abstract: A key structure includes a baseplate, a keycap and a connecting assembly. The keycap includes a plurality of first pivot portions and a plurality of sliding slots. The connecting assembly includes a first outer frame, two first inner frames, a second outer frame and a second inner frame. The first inner frames are disposed in two accommodating portions of the first outer frame. Two sides of the first outer frame are respectively connected to part of the sliding slots and the baseplate. Two sides of the first inner frame are respectively connected to the first pivot portion and the base plate. Two sides of the second outer frame are respectively connected to part of the sliding slots and the fixing side. Two sides of the second inner frame are respectively pivoted to one of the first inner frames and the base plate.

Abstract: A keyboard device includes a substrate, a keycap, a first connection member, and a first elastic arm structure. The substrate has a top surface, and the top surface has an assembling region. The keycap is disposed above the assembling region, and the keycap has a bottom surface facing the assembling region. The first connection member is connected between the keycap and the assembling region, the first connection member includes a first assembly side and a second assembly side opposite to the first assembly side, the first assembly side is pivotally connected to the bottom surface of the keycap, and the second assembly side is pivotally connected to the substrate. The first elastic arm structure includes a connection end and a free end opposite to the connection end, the connection end is connected to the first assembly side, and the free end abuts against the bottom surface of the keycap.