Dust-proof eraser for blackboard

According to the International Patent Classification (IPC), a dustproof blackboard eraser belongs to the technical field of blackboard or slate cleaning device group, writing or drawing article subclass, office supplies class, writing or drawing instruments, printing subsection, operation and transporting section. The utility model aims at solving the technical problem of too much chalk dust when cleaning a backboard, mainly comprises a small scale dust catcher, a big screw, a conductor and a button switch, and is characterized in that the top position of the small scale dust catcher is arranged in the bottom position of a wood board by the small screw, the bottom position of the small scale dust catcher is hanged and arranged in the middle part position of a box, one end position of the conductor is welded and arranged in the inner position of the small scale dust catcher, the other end position of the conductor is welded and arranged in the lower part position of the button switch, the top position of the box is arranged in the bottom position of the wood board by the big screw, and the bottom position of the box is adhesively arranged in the top position of a brush. The new technical proposal that is suitable for application has wide application in the field of blackboard or slate cleaning device group, and the utility model has the advantages of easy manufacture, low cost, convenient using and easy popularization.