| 摘要 |
<p>The shutter is opened by an electromagnetic drive rotating the ring, and returned to its closed position by an additional resetting force. The electromagnetic driving system has two, or a multiple of two, electromagnets (7) lying diametrically opposite each other. Their respective armatures (7a) are connected to the sector driving ring (4) through an intermediate element (9). The magnets can be formed as moving coil magnets and controlled via a lead, as that always at the same time point a unified magnetic field is generated in the coil to attract the armature (7a). The ends of the lever (9) are found in the driving ring (4) and the armature (7a) by rod slit connection (7b, 9a) and (9b, 11).</p> |
