| 摘要 |
<p>An efficient rotational-operation-quantity input device suitable to be built into a small electrical appliance is provided. An operational force applied by an operator is input in time series as a coordinate value (x, y) in an XY two-dimensional rectangular coordinate system by a two-dimensional force sensor (100), and is converted into a coordinate value (r, ¸) by a polar-coordinate converting section (200). When a value r of the coordinate value (r, ¸) obtained in time series is larger than a predetermined threshold rt, an operation-quantity recognizing section (300) recognizes the coordinate value (r, ¸) as a significant coordinate value, and, when the value ¸ generates a variation ”¸ exceeding a predetermined threshold ¸t with respect to a value "¸ before" immediately therebefore during a period during which a significant coordinate value (r, ¸) is obtained continuously, it recognizes a value corresponding to the variation ” ¸ as an operation quantity indicating a rotation.</p> |
