Patent ID: 6747867
Filing Date: 2004-06-08
Classification: G06F,H01H

Abstract:
A keyboard apparatus including an elevated and lower key structure, and comprising:a base; a first key-top-lid; a first scissors-device, which comprises a first connection rod and a second connection rod intersected to form a first turning scissors configuration, the first connection rod and the second connection rod each having an upper end, a lower end and a middle section, wherein the upper ends are connected to the first key-top-lid, the lower end is connected to the base, and the middle sections are pivotally connected between the upper and lower ends, the first scissors-device enabling the first key-top-lid to move up and down relative to the base; a second key-top-lid; a second scissors-device, which comprises a third connection rod and a fourth connection rod intersected to from a second turning scissors configuration, the third connection rod and the fourth connection rod each having an upper end, a lower end and a middle section, wherein the upper ends are connected to the second key-top-lid, the lower ends are connected to the base, and the middle sections are pivotally connected between the upper end and the lower end, the second scissors-device enabling the second key-top-lid to move up and down relative to the base; and a guiding board movably installed on the base and moveable between a first position and a second position, a first guiding block and a second guiding block being formed on the guiding board; wherein, when the guiding board is moved from the second position toward the first position, the first guiding block and the second guiding block separately press upon the second connection rod and the middle section of the fourth connection rod, to make the first key-top-lid and the second key-top-lid move downward relative to the base, and when the guiding board is moved from the first position toward the second position, the first guiding block and the second guiding block separately release the second connection rod and the fourth connection rod, enabling the first and second key-top-lids to move upward relative to the base.