Blackboard eraser dust treatment device for mathematics
A dust treatment and blackboard erasing technology, applied in the field of mathematical tools, can solve problems such as personal injury and pollution of grinding devices, and achieve the effects of preventing shedding, convenient and efficient use, and scientific and reasonable structure.
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[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] see Figure 1-3 , in the embodiment of the present invention, a blackboard eraser dust processing device for mathematics includes a dust collection box 1 and a locking bolt 20, one end of the dust collection box 1 is fixed with a movable seat 7, and a fixed rod 8 is inserted in the movable seat 7, One end of the fixed rod 8 passes through the movable seat 7 and is positioned in the dust collection box 1, and one end of the fixed rod 8 is provided with a...
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