| 摘要 |
<P>PROBLEM TO BE SOLVED: To accomplish an input device which easily prevents wrong input or erroneous operation without reducing operability or visibility of keys. <P>SOLUTION: An operation unit has an operation surface 51a which receives input operation, and an external form of the operation surface 51a in a plane view shape is rectangular including a plurality of sides 6a, 6b, 6c and 6d and a plurality of corners 51h, 51n, 51k and 51g. When points where extensions of adjacent two of the plurality of sides cross each other are defined as virtual intersections P1, P2, P3 and P4 and an intersection of diagonals connecting the virtual intersections is defined as a virtual center point 60, between a virtual intersection in the vicinity of a corner and the virtual center point, the outer form of the corner crosses a diagonal passing through the virtual intersection and the virtual center point and at least one corner, among the plurality of corners, is a specific corner 51h, 51k of which the intersection with the diagonal is located at a position closer to the virtual center point than two adjacent corners. <P>COPYRIGHT: (C)2012,JPO&INPIT |
