| 摘要 |
<p>PURPOSE:To provide a compact pen type data input device excellent in operability. CONSTITUTION:In this pen type data input device, a sphere 4 is rotatably fixed to the tip of a grip member 2, an optical sensor 5 for transmitting/receiving sensor light to/from the sphere 4 is arranged in the member 2 and plural reflecting faces 6 are formed on the surface of the sphere 4 so that the light reflection rates of adjacent reflecting faces 6 are respectively different.</p> |
