| 摘要 |
<p>Each time an actuator (11) is rotated in engagement with respective teeth (15) of a frame counter (17) in a disposable camera (1), the counter is rotated the equivalent of one frame to its next setting. To initialize the counter from a random setting during factory prewinding of an unexposed filmstrip (F) onto a take-up spool (3), the counter includes an elongate rise (39) located between two of its teeth (15). When the counter (17) is rotated sufficiently in a prewinding direction to locate the elongate rise (39) immediately ahead of the actuator (11), the counter (17) is initialized. Since the actuator (11) cannot surmount the elongate rise (39), continued rotation of the actuator in a prewinding direction will not rotate the counter (17) to another setting. Thus as the filmstrip (F) continues to be factory prewound onto the take-up spool (3) the counter (17) remains initialized.</p> |
