Patent
1991-11-12
1993-01-05
Gellner, Michael L.
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.
Cheng Chen-Chin
Chiou Yee-Haur
Huang Tsai-Jeon
Gellner Michael L.
Industrial Technology Research Institute
Noh Jae N.
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