Patent ID: 6755581
Filing Date: 2004-06-29
Classification: G06F,H01H

Abstract:
A foldable keyboard, comprising a left base plate, a right base plate, and a link shaft wherein one side of the left and right base plates are pivotally connected to the link shaft enabling the left and right base plates to fold and expand, characterized in which:a first keypad fixed on the left base plate; a second keypad glidingly installed on the right base plate; and at least a linkage mechanism with a first pivot joint, a second pivot joint, and a third pivot joint, the first, second, and third pivot joints are connected to the left base plate, the link shaft, and the second keypad respectively, wherein the linkage mechanism pulls the second keypad adjacently closed to the first keypad when the left and right base plates are expanded, and the linkage mechanism pushes the second keypad away from the first keypad when the left and right base plates are folded, and wherein said linkage mechanism comprises of three connecting rods with one common end and the other ends being the first pivot joint, the second pivot joint, and the third pivot joint respectively; whereby when the foldable keyboard is expanded, the connecting rod on the left base plate pulls other connecting rods to cause the second keypad to slid ably close to the first keypad; and when the foldable keyboard is folded, the connecting rod on the left base plate pushes other connecting rods away to make the second keypad slid ably away from the first keypad.