Sinkable keyboard device

A sinkable keyboard device, comprising:

• a substrate having an upper surface;
• a first keycap liftably disposed on the upper surface of the substrate, wherein the first keycap comprises a first abutting portion;
• a second keycap liftably disposed on the upper surface of the substrate, wherein the second keycap comprises a second abutting portion;
• and
• a sliding plate parallel to the substrate, wherein the sliding plate is movable relative to the upper surface of the substrate along a sliding direction;
• the sliding plate comprises a first guiding member and a second guiding member arranged along the sliding direction;
• the first guiding member has a first inclined guiding surface, and a first inclined angle is between the first inclined guiding surface and the upper surface;
• the second guiding member has a second inclined guiding surface, and a second inclined angle is between the second inclined guiding surface and the upper surface;
• the first inclined angle is different from the second inclined angle;
• wherein when the sliding plate slides relative to the substrate along the sliding direction, the first abutting portion of the first keycap abuts against the first inclined guiding surface and slides along the first inclined guiding surface firstly, so that the first keycap moves downwardly to come close to the substrate, and then the second abutting portion of the second keycap abuts against the second inclined guiding surface and slides along the second inclined guiding surface, so that the second keycap moves downwardly to come close to the substrate.