Seat for vehicle

A seat for vehicle, comprising:

• a base member secured to a seat cushion;
• a rotating arm rotatably supported by the base member through a reclining mechanism;
• a center-folding mechanism rotatably supported on a rotating side of the rotating arm;
• an arm plate rotatably supported by the rotating arm, the arm plate being provided with a seat back;
• a fitting bracket to be provided with a child seat, the fitting bracket rotatably supported by the rotating arm, wherein
• the child seat is contained within the seat back;
• the seat back can be folded onto the seat cushion by the center-folding mechanism when the child seat is contained within the seat back;
• the fitting bracket comprises a first interlocking cam;
• the rotating arm comprises a second interlocking cam which cooperates with the first interlocking cam;
• the base member comprises a cut-away portion at a predetermined point, so that an engaging portion provided on a tip of the second interlocking cam is engaged into the cut-away portion only when the rotating arm is at a predetermined tilt angle;
• the fitting bracket is allowed to rotate only at the predetermined tilt angle of the rotating arm;
• thereby activating an interlocking mechanism constituted by the first and second interlocking cams which cooperates with a rotation of the fitting bracket so as to lock the rotating arm to the base member.