Patent ID: 7709762

Claim:
A keyboard, comprising: a keycap comprising a bottom surface, a first edge and a second edge; a pivot structure comprising: two first engaging portions disposed on the bottom surface and having a first distance away from the first edge, wherein the first engaging portions comprise two grooves, and wherein each first engaging portion comprises a first lead angle disposed on the lower side of the first engaging portion; and two second engaging portions respectively disposed corresponding to the first engaging portions and having a second distance away from the second edge; a base disposed under the keycap; and an X-structure comprising two ends, wherein one end of the X-structure is connected to the pivot structure, and the other end of the X-structure is movably connected to the base so that the keycap moves upward and downward on the base, and wherein the X-structure comprises: a first connecting member comprising a first upper end and a first lower end; and a second connecting member comprising a second upper end and a second lower end, wherein the first upper end comprises two pivot axles, each pivot axle comprising a second lead angle disposed corresponding to the lower side of the first engaging portions; wherein the pivot axles are pressed and engaged with the grooves of the first engaging portions, the pivot axles are slidable in the grooves, and the second upper end is rotatably connected to and pivoted on the second engaging portions.