Rotation supporting device of swivel seat

A rotation support device of a swivel seat, the rotation support device comprising:

• a fixed frame which is installed on a body of a vehicle;
• a rotating frame which is rotatably installed with respect to the fixed frame;
• and
• a rotating sliding portion which is installed to be able to contact the rotating frame along an entire circumferential extent of the rotating frame with respect to the fixed frame in such a contacting manner that a buffer function is continuous,
• wherein the rotating sliding portion comprises:
• a single lower J hook which is continuously installed along an entire perimeter thereof with respect to the center of rotation of the fixed frame;
• a plurality of upper J hooks which is installed at a local position with respect to the rotating frame and is arranged to concentrically face the lower J hook;
• and
• a first sliding member which is installed on the upper J hook and is arranged to be able to continuously contact the lower J hook,
• wherein the first sliding member comprises an assembly groove formed in a bottom surface thereof so as to be fitted to the upward bent portion of the upper J hook,
• wherein the assembly groove is provided with a buffer protrusion that protrudes alternately downward at spaced apart positions for elastic deformation of the first sliding member in a thickness direction, and
• wherein the rotating sliding portion comprises at least two sliding members configured to provide the buffer function through multiple contacts.