| 摘要 |
PURPOSE: Provided is a blackboard with an eraser included which quickly erases characters written on the blackboard and prevents chalk dusts from being flown so that it eliminates inconvenience caused by flying chalk dusts. CONSTITUTION: The blackboard with the eraser included comprises the parts of: a machine room(4) which includes a curve part, a frame(2) and a switch door; a board(6) which is wound in an endless style through both rollers(5,5'); a support sheet which is placed inside the board; a motor which is placed in the machine room to rotate one rollers; a belt which connects one roller and the motor; an erase roller(10) which is vertically placed at the machine room to touch with the board; a belt which connects the erase roller and the motor; a switch which is placed at the lower edge of the frame to control the motor; and a dust receiver(13) which is placed under the machine room.
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