| 摘要 |
PROBLEM TO BE SOLVED: To restrain vibration of a lid part of a casing during driving a motor, and stably supply resin to an entire upper face of the lid part during forming a motor frame.SOLUTION: A motor comprises: a cylindrical rotor magnet; a rotation part having an impeller and rotating around a center shaft J1 as a center; a stationary part 2; and a bearing mechanism supporting the rotation part rotatably to the stationary part. The stationary part has a cylindrical shape with a lid, and comprises: a casing 5 inside which a rotor magnet is arranged; a stator 21 that surrounds a circumference of the rotor magnet outside a cylinder part of the casing; and a motor frame 22 made of resin filled on an upper side of the lid part 51 of the casing and a radial outer side of the cylinder part 52, and covering at least one part of the stator. A protrusion part 6 provided on an upper face of the casing has plural protrusion elements 61, 62 whose radial positions are different from each other, and an entire non-protrusion region except for the protrusion parts on the upper face is one continuous region continuously enlarged in a direction vertical to the center shaft. |
