Automatic dust-free blackboard
An automatic dust-free blackboard comprises a mounting face plate, rectangular or square mounting grooves are formed in the mounting face plate, a left blackboard body and a right blackboard body are arranged in the mounting grooves in a staggered sliding mode, a sliding piece is arranged on one sid...
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Sprache: | eng |
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Zusammenfassung: | An automatic dust-free blackboard comprises a mounting face plate, rectangular or square mounting grooves are formed in the mounting face plate, a left blackboard body and a right blackboard body are arranged in the mounting grooves in a staggered sliding mode, a sliding piece is arranged on one side of the mounting face plate, bristles are arranged on the sliding piece, the sliding piece is connected with a push rod through a cross transmission frame, the push rod makes contact with a cam on the upper surface, and the cam is connected with a motor. The automatic dust-free blackboard can solve the problem that an existing blackboard can be used again after the blackboard full of characters is wiped clearly and the teaching efficiency of a teacher is influenced. |
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