| 摘要 |
PROBLEM TO BE SOLVED: To reduce erroneous keyings by providing a large space at the upper and lower and right and left parts of a keyboard, and to provide a solar battery in the free space. SOLUTION: In this keyboard, numerics of 0 to 9 are arranged in one coordinate axis, and numerics of 0 to 9 are arranged in another coordinate axis, and characters, numerics and symbols or the like are assigned to one hundred areas being the intersection of those respective coordinate axes, and the size of another normal keyboard is reduced to make the space between keyboards several times as large as the area of the keyboard. Also the solar battery is embedded in the space formed between keyboards and is utilized as the power source or preliminary power source of portable equipment.
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