| 摘要 |
A rotary connector using a plurality of flat cables in which buckling of the flat cable is prevented is disclosed. In a space defined between a fixed housing having an outer cylindrical wall and a movable housing having an inner cylindrical wall, two flat cables having reverse parts in the middle are overlapped and wound, and both ends of each of the flat cables are gathered at a fixed side joint on the outer cylindrical wall and a movable side joint on the inner cylindrical wall. Each of the first and second flat cables is a band-shaped body in which a plurality of conductors are laminated between a pair of base films. By performing a surface roughening process to the surface of one of the base films, a rough face having the central line average roughness Ra of 0.03 mu m or larger is formed. The flat cables are overlapped so that the rough surface comes into contact with the flat face of the other cable.
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