SYSTEM FOR DRIVING ELECTRONIC SHUTTER OF CAMERA Russian patent published in 2000 - IPC

FIELD: camera designs. SUBSTANCE: system includes device for setting lens to initial position, energy source with pinion, speed reduction gear, ring for controlling focusing, lens holder integrated in one unit with lens case, photointerrupter, lever of sector blades and automatic exposure meter. Speed reduction gear is engaged with pinion of energy source and with focusing control ring mounted with possibility of rotation in the same direction as pinion. At rotating said ring moves holder of lens according to value calculated in unit for measuring distance. Photo interrupter detects position change of ring and returns it to initial position at controlling energy source. Automatic exposure meter rotated in one direction by means of flexible part may rotate in opposite direction or return to initial position. Lever of sector blades is joined with automatic exposure meter with possibility of rotation for opening/closing sector blades. Initial position of lens is between its positions corresponding to focusing of the most distant object and the nearest one. EFFECT: enhanced quick-action of shutter due to reduced time period for focusing control. 4 cl, 38 dwg