Patent ID: 7796848

Claim:
An electronic apparatus comprising: a first frame and a second frame that are relatively movable; a frame boundary portion that is provided between the first frame and the second frame; a light emitting portion that is provided on the first frame and transmits an optical signal; a light receiving portion that is provided on the second frame and receives the optical signal; and an optical transmission medium that transmits the optical signal between the frame boundary portion and at least one of the light emitting portion and the light receiving portion, wherein an optical transmission between the light emitting portion and the light receiving portion via the optical transmission medium is effected at the frame boundary portion by a spatial optical transmission, the frame boundary portion has a rotating mechanism respectively rotating the first and the second frames, the spatial optical transmission is effected when the first and the second frames are at a predetermined specific position, a central axis of the optical transmission medium is not parallel to an axis of rotation of the rotating mechanism, the spatial optical transmission is in a direction not parallel to the rotation axis, and the optical transmission medium is respectively provided between the frame boundary portion and the light emitting portion and between the frame boundary portion and the light receiving portion.