Key structure

A key structure, comprising:

• a keycap comprising a main body and a coupling shaft, wherein the coupling shaft is disposed on a bottom surface of the main body, and the coupling shaft comprises at least two opposite coupling ribs and two opposite openings;
• a pedestal comprising a key slot, at least two stopping parts and at least two buffering elements, wherein the key slot has an upper part and a lower part, the coupling shaft is penetrated through the upper part of the key slot and movable within the key slot upwardly or downwardly, the at least two stopping parts are located at the upper part of the key slot and aligned with the at least two coupling ribs, and the at least two buffering elements are located at an inner surface of the key slot, contacted with a surface of the coupling shaft and aligned with the at least two openings;
• and
• an elastic element installed in the lower part of the key slot, wherein the elastic element is contacted with the coupling shaft, so that the at least two coupling ribs are contacted with the at least two stopping parts,
• wherein when an external force is applied to the main body of the keycap, the at least two buffering elements are inserted into the at least two openings, wherein when the external force is released, the elastic element is elastically restored, so that the keycap is ascended and returned to an original position, wherein while the keycap is ascended and returned to the original position, the at least two buffering elements are detached from the at least two openings and the at least two buffering elements interfere with the coupling shaft, so that an ascending speed of the keycap is reduced and a click sound generated from collision between the at least two coupling ribs and the at least two stopping parts is reduced.