Foldable keyboard

摘要

A lower end of one of two support members 80 is pivotally connected to a support wall 81 having a slant face 81A in a first keyboard unit 3 and an upper end is pivotally connected to one plate part of a hinge joint 92. A lower end of the other support member 80 is pivotally connected to a support wall 83 having a slant face 83A in a second keyboard unit 4 and an upper end is pivotally connected to the other plate part of the hinge joint 92. At the time when the first and second keyboard units 3 and 4 are fully opened in a horizontal position, the support members 80 are set up in a standing orientation tilting at an angle of 45° with the operating plane of a keyboard 1.