| 摘要 |
PROBLEM TO BE SOLVED: To enable to prevent false operation of a plurality of push buttons without damaging operability of those arranged in a cluster. SOLUTION: Each button top face of first to fifth push buttons 23 to 27 arranged in a cluster is made at the same height, and at the same time, the button top face of the first push button 23 located at a center part is formed in a shape different from each button top face of the second to fifth push button 24 to 27 located around it. Accordingly, even if each button top face of the first to fifth push buttons 23 to 27 are almost at the same height, the first push button 23 at the center part can be discriminated from the second to fifth push buttons around it by the shape of each button top face. With this, false operation of the first push button 23 with the second to fifth push buttons 24 o 27 can be prevented without damaging operability of the first to fifth push buttons 23 to 27. COPYRIGHT: (C)2006,JPO&NCIPI
|
