| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve operability in a ten-key device for inputting a personal identification number or the like, constituted to randomly change the array of figures for every operation. SOLUTION: This ten-key device is provided with digitally displayed keys 11, 41 for inputting figures and constituted to randomly change the array of the figures for every input operation. Different colors are assigned and put to the respective figure display parts.</p> |
