Patent ID: 8669942

Claim:
An input device comprising a plurality of operation units for detecting input signals through descending-ascending movement of pushed and returned operation surfaces, wherein each of the operation units has an operation surface for accepting an input operation, the operation surface has a rectangular contour in a plan view, comprising a plurality of sides and a plurality of corner portions, when a point at which extensions of adjacent two of the plural sides cross each other is defined as a virtual intersection and an intersection of a plurality of diagonals linking the virtual intersections is defined as a virtual center, the contour of the corner portion crosses the diagonal that passes through the virtual intersection and the virtual center, at a position between the virtual intersection in the vicinity of the corner portion and the virtual center, at least one of the corner portions is a specific corner portion having an intersection with the diagonal at a position closer to the virtual center than the adjacent two corner portions, and the extensions of the adjacent two of the plural sides are perpendicular to each other.