| 摘要 |
The vertical actuator (32) has a stationary part (30) and a movable part (6), where the stationary part has a magnetic yoke (8) and a coil (10) that is supported by the yoke. The movable part has a permanent magnet (14) that is movably arranged inside the yoke. The stationary part has an upper part (34) made of magnetic material, where the upper part is arranged above the movable part. The upper part and the yoke are magnetically separated from each other by a part (36) made of non-magnetic material. |
