| 摘要 |
PURPOSE:To prevent erroneous detection by delaying a timer output during the strobe charging of a camera with a film end detector which compares the completion of a film advance by a motor with the timer output. CONSTITUTION:When a motor-driven camera incorporating a strobe does not uses the srobe, a switch F.SW is on the side OFF, so when the output of an FF95 is inverted positively, a gate 306 is inverted in level to generate a film end detection signal. When the strobe is in use, the switch F.SW in on, so when the output of the FF96 is inverted positively, the film end detection signal is sent out. Motor torque decreases because of the capacity of a power source during strobe charging, so it takes an extra time to take up a film, but the switching means for a timer is used as mentioned above to eliminate erroneous detection. |
