| 摘要 |
In the camera actuator mechanism disclosed, two series main switches serve to energize an electronic timer. One of the switches is normally closed. A shutter release holds the other switch open. As the shutter release is depressed to snap a picture it first performs preliminary functions other than opening the shutter. During this stage of depression the shutter release closes the open switch. The shutter release forms a ratchet-pawl arrangement with a pivotally mounted locking member. When the shutter release reaches a second position from its first, undepressed position, the locking member locks the shutter release in the second position and simultaneously is pivoted by the shutter release to open the normally-closed switch. In that second position the open switch closes. When the shutter release reaches a third position it allows the locking member to pivot around. This releases the shutter release and at the same time allows the normally-opened switch to close. The other switch remains closed. Thus both switches are closed only when the shutter release is depressed to its third position. This prevents needless use of electrical power while the shutter release performs its preliminary function in the first and second position. From its third position the shutter release returns to its first position.
|
