Blackboard eraser

The utility model relates to a blackboard eraser which comprises a shell, a sponge block, a U-shaped seat, a fixing shaft, a telescopic rod and a rotating sleeve, and the sponge block is arranged at the bottom of the shell. A U-shaped base is installed on the top of the shell, a fixing shaft is installed in the U-shaped base, a rotating sleeve is arranged at the left end of the telescopic rod, and the rotating sleeve is arranged on the fixing shaft in a sleeving mode. The blackboard eraser has the advantages that when the blackboard eraser is used, a student holds the telescopic rod by hand, the blackboard eraser can be conveniently used by students with different heights by adjusting the length of the telescopic rod, meanwhile, the rotating sleeve can rotate on the fixing shaft, and therefore the angle between the telescopic rod and the shell can be adjusted, and the student can clean a blackboard more conveniently. 本实用新型涉及一种黑板擦，包括壳体、海绵块、U形座、固定轴、伸缩杆和转动套，壳体底部设有海绵块；壳体顶部安装有U形座，U形座内安装有固定轴，伸缩杆左端设有转动套，转动套套设在固定轴上。本