| 摘要 |
PURPOSE: A self blackboard eraser shaking device is provided to offhandedly dusting without a separately designed device and to obtain use convenience. CONSTITUTION: A self blackboard eraser shaking device comprises an eraser(100), a fixing pin(150), a frame(110), a handle(120) and a support frame(130). The blackboard eraser includes a groove(140). The groove includes a fixation pin(150) inside. The handle is attached to the frame. The support is attached to the frame. The handle moves the eraser to left and right and shakes the eraser by using the roll.
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