Relative rotary members relaying apparatus

摘要

A relative rotary members relaying apparatus of the invention comprises, a rotary body having an internal cylindrical portion, a fixed body which surrounds the internal cylindrical portion with a predetermined distance and has an external cylindrical portion rotating relative to the internal cylindrical portion, a flexible flat cable stored along an annular space provided between the internal cylindrical portion and the external cylindrical portion, a lower cover for covering one side of the space in axial direction, and an upper cover for covering the other side of the space in axial direction which are fixedly mounted to the fixed body. A first radial clearance between the first cover and the first rotating body being configured to be different from a second radial clearance between the second cover and the rotary body.