| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power tool having a fan of low noise and high strength by reducing a separation vortex to reduce noise and by restraining the fan from being deformed by centrifugal force. <P>SOLUTION: The power tool has a motor, a fan body provided in the motor, and blades provided in the fan body, wherein an inlet through which air flows into the fan body has a portion where the blade extends in a reverse direction to the rotating direction of the blades from the radial inside toward the outside and a blade angle defined by the blade and a line segment extending from the center of the fan body to the blade is the largest. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
