The present invention relates to a device for transmitting signals between two components capable of relative rotational movement, of the type comprising respectively two, outer and inner, cages (100, 200) capable of relative rotation, and flexible signal-conducting means (400) placed between the two cages (100, 200), characterised in that the device comprises an indexing system formed, on the one hand, by a spiralled guide (372) made on a first component (350) and, on the other hand, by an indexing finger (380) engaged on the spiralled guide (372) and placed in a window (130) made in a second component (100) capable of rotation with respect to the first component, so that the indexing finger (380) is moved radially with respect to the axis of rotation (O-O) of the components when they are driven in relative rotation. IMAGE
展开▼