| 摘要 |
PROBLEM TO BE SOLVED: To ensure watertightness in a case holding circuit elements and a circuit board. SOLUTION: A brushless motor which rotationally drives its rotor according to the exciting current is formed by holding a stator on a motor holder 1, rotatably supporting the rotor on a stator, in stalling a circuit board mounted with an exciting circuit for supplying exciting current to the stator on the motor holder 1, and installing a lower case 17 for covering the circuit board on the motor holder 1. A notch for letting water drops escape is formed in the lower case 17 at a joint between the motor holder 1 and the case, thereby water drops are prevented from running down to the lower case 17 holding circuit elements and the like, and the circuit elements and circuit board are prevented from being moistened with water drops. |
