Automatic instant focusing and exposing mechanism for photograph

Patent

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Details

354439, 3542341, 3541951, G03B 310, G03B 922

Patent

active

051775239

ABSTRACT:
An improved mechanism for cameras includes a solenoid which drives a cam ring to rotate to a control position for focusing or exposing; a motor drives a planetary gear set which includes a swing arm with a pinion fixed thereon. When the cam ring is in the control position for focusing, the pinion transmits the power generated by the motor to the teeth of the focusing ring to cause the focusing ring to rotate and focus. When the cam ring is in the control position of exposing, the pinion disengages from the teeth of the focusing ring to engage with the internal gear of the planetary gear set to cause the swing arm to oscillate and thereby actuate the shutter mechanism. At this time, the cam ring also initiates the movement of a ratchet set so that the focusing ring cannot move freely during the exposure process.

REFERENCES:
patent: 4881096 (1989-11-01), Ogihara et al.
patent: 5047796 (1991-09-01), Tagami et al.
patent: 5060000 (1991-10-01), Ogihara et al.

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