Patent ID: 8110764

Claim:
A key structure, comprising: a substrate; a circuit board, disposed on the substrate; a key cap, comprising a first surface and a guiding portion extending along a first direction, wherein the guiding portion comprises a second surface; a first link, connecting the key cap with the substrate, wherein the first link is made of metal and comprises a sliding end forming a first curved portion and a second curved portion, wherein the first and second curved portions are slidable along the guiding portion and respectively adjacent to the first and second surfaces, wherein the sliding end is Z-shaped and comprises two angled structures, and the first and second curved portions are formed as the two angled structures; a second link, connecting the key cap with the substrate, wherein the second link is pivotally connected to the first link; a switch disposed on the circuit board, wherein when the key cap is depressed from a first position to a second position by an external force, the first link contacts the switch; and an elastic member disposed on the circuit board, wherein when the external force is released, the elastic member provides a recovery force to return the key cap to the first position.