Patent ID: 6596953
Filing Date: 2003-07-22
Classification: H01H

Abstract:
A key switch of a computer keyboard comprising:a keycap; an upper cover located under the keycap; a lower cover located under the upper cover; a connecting device connected between the keycap and the upper cover for moveably connecting the keycap above the upper cover in an up and down manner; and a heat dissipating device comprising a container and a piston, a top of the piston being fixed on a bottom of the keycap, a bottom of the piston being movably installed inside an opening formed on a top of the container, a bottom of the container being fixed on the lower cover, a sidewall of the container comprising at least a first opening and at least a second opening formed between the upper cover and the lower cover for dissipating heat between the upper cover and the lower cover; wherein when the keycap is depressed, the piston moves downward with the keycap so as to expel air inside the container through the first opening, and when the keycap is released, the piston moves upward with the keycap so as to allow air outside the container to enter the container through the second opening.