| 摘要 |
PURPOSE:To simplify mechanism by generating a prescribed signal when the movement position of an optical system coincides with the position of a distance zone expressed by a zone signal and by stopping the movement of the optical system in response to the signal. CONSTITUTION:The projecting arm part of a focus lever 10 for making a photographic lens 2 come out by the operating force of a spring 13 is provided with one engagement pawl 11 and (n)-number of engagement pawls 12 as many as photodetecting elements 71-7n of a photodetector 7. The 1st engagement laver 14 for detaining the photographic lens 2 at an infinite-distance in-focus position against the force of the spring 13 by engaging with the engagement pawl 11 of a focus lever 10 is pivoted freely turnably on a fixed pin 15, and further energized by a spring 16 to turn clockwise, i.e. in the direction wherein it engages with the engagement pawl 11 of the focus lever 10. |
