Fitting device for accessory

A fitting device for an ornamental accessory comprising:

• a pair of connecting members each having a cylindrical portion on an end to be fitted together in a rotatable manner relative to each other;
• one of said connecting members having at its fitting end at least one piece of guide groove, said guide groove comprising a thrust groove which is open into an outside and extends in an axial direction of said connecting member, a rotation groove which bends from an inner end of said thrust groove and extends in a circumferential direction, and a fixing groove which bends from that end of said rotation groove which is away from said thrust groove towards said fitting end;
• the other of said connecting members having at its fitting end a projection which is thrusted into said thrust groove and moves along said rotation groove, said projection being positioned to correspond to said guide groove;
• each of said connecting members having inside its fitting end portion magnet pieces disposed on a plane, said magnet pieces having N pole and S pole arranged to lie alternately in a circumferential direction, thereby forming a magnetized surface facing outwards;
• wherein said projection projects out of said guide groove, said fitting device further comprising a covering member which is disposed over the external periphery of said connecting member to keep said projection out of sight.