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US4278336A Operation detecting device for camera 失效
相机操作检测装置

Operation detecting device for camera
摘要:
The present invention is directed to an operation detecting device of a camera for detecting the operation of an operation member such as the shutter member. The operation detecting device functions by detecting the electrical signal produced at the time at which a closed magnetic circuit is opened when a magnet operates so as to actuate or release the operation member.
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