| 摘要 |
<p>PURPOSE: An automatic cleansing blackboard is provided to reduce the fatigue of a lecturer by automatically washing letters in the blackboard and to make pleasant indoor environment by controlling the generation of dust. CONSTITUTION: An automatic cleansing blackboard comprises: a rectangular case(3); a roller(42) which is installed on the inner side of both ends of the case; a rotating unit(4) which has a drive unit(44) rotating the roller; a blackboard member(2) which is inserted into the case and includes the roller and the surface of the blackboard; a cleaning unit which is installed on the back side of the blackboard member and washes the surface of the blackboard; and a controller which controls the rotating unit and the cleaning unit.</p> |
