| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power tool which can prevent the intrusion of powder dust, iron powder, etc. thereinto, and is excellent in dust protective property. SOLUTION: Shielding form members 17, 18 are provided on a line segment connecting the inner circumferential surface at front and rear ends of a magnet 10c and the edge of a vent hole with a minimum length so as to cover the outer circumference of an armature as a part of the inside rib shape of two piece divided housings 1. COPYRIGHT: (C)2008,JPO&INPIT
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