Rotation center type joint and assemblies using it

In combination, a satellite reflector on a mechanical linking device with release means with a rotation center type joint disposed between said mechanical linking device and said reflector, said rotation center type joint having a fixed rotation center and comprising a one-piece body having an axis and comprising an inner part, an outer part and a plurality of elastically deformable transverse arms inclined relative to said axis and linking said inner part and said outer part and converging towards said fixed rotation center, said transverse arms being elastically deformable beams, the ends of which are rigidly connected to said inner part and said outer part respectively and the neutral fibers of said elastically deformable beams converging towards said fixed rotation center located on said axis, said inner part and said outer part being respectively fixed to said mechanical linking device and to said reflector.