Inter-relative rotating member relaying device

A rotatable relay device, comprising:

• a first rotating unit having an inside cylinder section and a flange, said flange having an upper surface and a peripheral end section, said peripheral end section susceptible to deformation;
• a second rotating unit having an outside cylinder section encircling the inside cylinder section with a predetermined distance, said second rotating unit being rotatable with respect to said inside cylinder, said inside cylinder section and said outside cylinder section defining a ring-shaped space;
• a flexible flat cable placed in said ring-shaped space between said inside cylinder section and said outside cylinder section, said flexible cable having an inner peripheral end section held by said inside cylinder section and an outer peripheral end section held by said outside cylinder section, said flat cable being susceptible to damage from passing over the deformation of said peripheral end section;
• and
• a mobile unit movably mounted on said upper surface of said flange in said ring-shaped space, for inverting said flexible flat cable at an opening section,
• wherein said peripheral end section is spaced from said upper surface to avoid damage of said flexible cable from passing over the deformation of said peripheral end section.