Dust-free blackboard eraser
The utility model relates to a classroom appliance, particularly a dustless blackboard eraser which can not flies the chalk powder at blackboard cleaning time. The dustless blackboard eraser comprises a blackboard eraser and a small water tank. The utility model is characterized in that the lower ha...
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| Format: | Patent |
| Sprache: | eng |
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| Online-Zugang: | Volltext bestellen |
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| Zusammenfassung: | The utility model relates to a classroom appliance, particularly a dustless blackboard eraser which can not flies the chalk powder at blackboard cleaning time. The dustless blackboard eraser comprises a blackboard eraser and a small water tank. The utility model is characterized in that the lower half part of a bottom board of the blackboard eraser is provided with the small water tank, and a plurality of small holes are arranged on the connecting point of the bottom board and the small water tank. Thus, the utility model has the advantages of simple structure, convenient operation, cleanness, dust preventing, safety and sanitation. |
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