| 摘要 |
PURPOSE: A chalk eraser is provided not to need to remove a chalk by dropping automatically a chalk when to remove a chalk written on a blackboard. CONSTITUTION: A chalk eraser comprises: a case(100) to open the one side; a wiper of a chalk(200) to be equipped on the room of a case(100) to be possible a rotation and a movement, and to remove directly a chalk from a blackboard; a member of shaking off a chalk to shake a chalk off a wiper of a chalk(200); a reclaimer of a chalk(400) to reclaim a chalk collected in a case(100).
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