Low-height key structure

A low-height key structure, comprising:

• a keycap;
• a supporting plate;
• a connecting element connected with the keycap and the supporting plate, wherein the keycap is movable upwardly or downwardly relative to the supporting plate through the connecting element;
• a circuit board disposed on the supporting plate, wherein a switch element is installed on the circuit board;
• and
• an elastic element arranged between the keycap and the circuit board, and comprising a contacting part and an elastic support part, wherein the contacting part is contacted with a bottom surface of the keycap, the contacting part comprises a bowl-shaped concave structure, and a raised structure is protruded from a middle region of a bottom side of the bowl-shaped concave structure, wherein the elastic support part is located under the contacting part and connected with the contacting part, the elastic support part has an inner space, and a short pressing part is disposed on a middle region of a top side of the inner space and aligned with the switch element,
• wherein the short pressing part and the raised structure are opposed to each other, and a top surface of the raised structure is at a level lower than or equal to a top surface of the contacting part.