Power tool dust collecting device and power tool

摘要

In a power tool dust collecting device (30), a blocking ring (50) that is subject to elastic deformation upon contact with a workpiece surface for blockage between a suction head (45) and the workpiece surface is provided to the front surface of the suction head (45) to be brought into contact with the workpiece surface. The blocking ring (50) has a ventilating portion (a V-shaped slit (53)) that ensures the flow of air to the suction head (45) regardless of whether the elastic deformation has occurred.