| 摘要 |
PURPOSE:To decrease noises resulting from magnetic sounds by a mechanism wherein a ring is mounted around a yoke. CONSTITUTION:A ring 23 is disposed around a yoke 1. The ring 23 may be a circle, one portion thereof is notched, or a complete circle. A fitting location is arbitrarily selected in response to a vibration mode of the yoke 1. Thus, noises resulting from magnetic sounds can be decreased because the vibration mode of the yoke 1 is lessened. |
