| 摘要 |
PROBLEM TO BE SOLVED: To solve problems such as the impossibility of the exact specification of the position of a writing utensil due to the unstable mounting of a sensor, especially under the condition that the sensor is employed in a writing board, the board surface of which scrolls, the happening of no functioning of the sensor due to the peeling off of the board surface by means of the own weight of the sensor. SOLUTION: An optical mounting part 2 for mounting the sensor 8 to a board surface 70 side is provided. In addition, the optical mounting part 2 is pressed against the upper frame part 72a and the lower frame part 72b of the writing board 7 through a rear surface pressing mechanism 4 and a pressing mechanism 5.
|
