| 摘要 |
PROBLEM TO BE SOLVED: To make a plurality of unshielded signal wires for IR-ray communication into a cable along with electric wires for power supply in the state, producing little noise without accompanying so much increase in the outside diameter of the cable. SOLUTION: In a cable 5 for power supply, four power wires 19 are disposed with the same separation from the cable 5, in such a manner that two wires with mutually opposite direction of the electric current to adjoin each other. A signal line 20 of supply, 21 of grounding, 22 of transmitting and 23 of receiving for IR communication have been disposed at positions, making contact with the power lines 19 and near outward locations in the cable, in such a manner as equal distance with respect to two neighboring power lines 19. The power lines 19 and signal lines 20 to 23 have individually been insulated but not shielded. A communication cable 25 for wireless communication using wireless antenna has been disposed inside the power wires 19 in the cable 5. |
