Patent ID: 6152627
Filing Date: 2000-11-28
Classification: G06F,H01H

Abstract:
A keyboard device comprising a plurality of keyswitches each having a keytop movable up and down and including a first operating member one end of which is slidably held by a supporting member and another end of which is pivotably held by a keytop; and a second operating member one end of which is pivotably held by the supporting member and another end of which is slidably held by the keytop, said first and second operating members being combined via a shaft into a crossing form,wherein when the distance from said one end of said first operating member to said shaft is defined as a first distance, the distance from said another end of said first operating member to said shaft is defined as a second distance, the distance from said one end of said second operating member to said shaft is defined as a third distance, and the distance from said another end of said second operating member to said shaft is defined as a fourth distance, at least said first distance is different from said third distance, wherein the angle of said keytop varies depending on whether said keytop is in an initial position or in a pressed position,the first distance and the third distance are different from each other, wherein the first distance is equal to the fourth distance, and wherein the second distance is equal to the third distance.