| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively utilize the dead space of keys and to miniaturize a device by respectively housing storage batteries in the keys of a keyboard and connecting the storage batteries. SOLUTION: The cover 1 of this keyboard device is attached to a case body 3 freely rotatably through a hinge 4 and opened and closed and a screen device 2 is attached to the inner side face of the cover 1 and displays characters or drawings. Also, the keys 5 are arrayed on the upper surface part of the case body 3, information signals are inputted by pressurization and switches 7 are provided in the lower part of the keys 5 and operated by the pressurization of the keys 5. Then, the storage batteries 8 are incorporated in the keys 5 and supply a DC voltage and a connection line 6 connects the storage batteries 8 by U-shaped wiring on the back surface of the keys 5. As a result, by dividing the storage batteries in the keys which were the dead space, the case body 3 is made thinner further and the keyboard device is miniaturized.</p> |
