ELECTRONIC EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To perform full duplex communication even at the time of optical communication and to accelerate data transmission by unmatching a pair or light receiving and emitting directions for the optical communication of an extension unit and a main body. SOLUTION: An optical communication module 7 composed by arranging a pair of a first light emitting element 5 and a first light receiving element 6 side by side is disposed in the bottom surface of the main body 1 and a second light emitting element 8 is disposed on the back surface of the main body 1. Further, the main body 1 is provided with an attachment/detachment detection means for electrically detecting attachment and detachment to/from the extension unit 3 by pull-up or pull-down or the like. In the meantime, a third light emitting element 9 to face the first light receiving element 6 when the main body 1 is mounted on a recessed part 4 is disposed at the bottom surface of the recessed part 4 of the unit 3 and a third light receiving element 11 to face the second light emitting element 8 when the main body 1 is mounted on the recessed part is disposed on the front surface of the rear end erected part 10 of the unit 3. In such a manner, a pair of the light receiving and emitting directions for the optical communication of the extension unit 3 and the main body 1 are unmatched.