| 摘要 |
A shutter blade or a shutter blind can be actuated by means of a driving or carrier element (18) which can be locked in a shutter cocked position by a blocking lever arrangement (12, 16), which is provided with a first lever (12) having a curved end or nose (12a), which can be brought to engage with the carrier element (18), and a second lever (16) equipped with an iron piece (16c) which can be attracted by an electromagnet (22, 42), which in the energised state pivots the first and second levers (12, 16) together (via a bend) in a direction to release the carrier element (18) for activating the shutter blind. The second lever (16) can be locked against a movement, in order to actuate the carrier element (18) by a linearly movable tracker as a function of the actuation of a rapid return mirror mechanism. When a shutter release button is pressed to elevate the mirror (49) to initiate an exposure process, the second lever (16) is disengaged from the tracker and is attracted by the energised electromagnet (22, 42) to trigger or release the carrier element (18). After the exposure has been carried out, the mirror (49) swings back, so that the tracker can lock the second lever (16) against movement. The first lever (12) is then in a position in which it can lock the carrier element (18) in the shutter cocked position. <IMAGE>
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