| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor which securely holds magnets to a back yoke even when vibrations and temperature changes occur.SOLUTION: An outer rotor type motor includes: a rotation shaft; an annular magnet 21 multipolar magnetized; and a back yoke 12 that is provided with an inner peripheral surface engaging with an outer peripheral surface of the magnet 21, is formed into a cup shape, and integrally rotates with the rotation shaft. The outer rotor type motor includes protruding parts 19 that are provided at the opening side of the inner peripheral surface of the back yoke 12 so as to protrude inward; and slits 14 that are provided on the outer peripheral surface of the magnet 21 so as to match the protruding parts 19 of the back yoke 12. The magnet 21 fits in the back yoke 12 while causing the protruding parts 19 to engage with the slits 14 and being able to adjust its position in a direction perpendicular to a bottom surface of the magnet 21 and a circumferential direction. Each slit 14 has a return stopper recessed part 18 engaged with the protruding part 19 at a predetermined position and holding the magnet 21 in the removal stop state when the position of the magnet 21 is adjusted in the back yoke 12. |
