| 摘要 |
<p>PURPOSE:To attain the simple handling of a keyboard by folding the base board of the keyboard at its center part into a chevron shape and providing operation keys on the keyboard. CONSTITUTION:A base board 10 of a keyboard is folded at its center part into a chevron shape to obtain the symmetrical sloping surfaces 12 and 14. Here the cross angle theta between both surfaces 12 and 24 is set desirably within a 100-150 deg. range. In addition, the approximately horizontal support plates 16 are attached symmetrically at the front edge parts of the board 10 forming both surfaces 12 and 14. Thus both wrist parts of an operator can be put on both plates 16 and therefore the stable finger actions are secured in operation of keys.</p> |
