Abstract: A structure allows a functional member to be attached to an alloy frame without welding. In the state where a ratchet is disposed on a second side of the frame having an attachment bracket supported on a first side, a first fastener member is inserted through the functional member, frame, and attachment bracket so as to be received by a second fastener member provided in the attachment bracket.

Abstract: In a seat back frame formed by attaching a spring unit to a frame body, the spring unit is easily attached to the frame without performing caulking. A projecting hooked portion is formed in one side of the spring unit, and an insertion hole that receives the hooked portion therein is provided in the frame. Thus, the hooked portion is inserted into the insertion hole and hooked at a position on the rear surface thereof.

Abstract: A structure allows a functional member to be attached to an alloy frame without welding. In the state where a ratchet is disposed on a second side of the frame having an attachment bracket supported on a first side, a first fastener member is inserted through the functional member, frame, and attachment bracket so as to be received by a second fastener member provided in the attachment bracket.

Abstract: In a seat back frame formed by attaching a spring unit to a frame body, the spring unit is easily attached to the frame without performing caulking. A projecting hooked portion is formed in one side of the spring unit, and an insertion hole that receives the hooked portion therein is provided in the frame. Thus, the hooked portion is inserted into the insertion hole and hooked at a position on the rear surface thereof.

Abstract: A tilt-type headrest mounted on an upper horizontal portion of an arched support rod to be mounted on a backrest of a passenger seat, which headrest includes a headrest frame formed with a cylindrical hinge portion retained in frictional engagement with the horizontal portion of the support rod and a pair of opposed plate-like body portions extending in parallel from the hinge portion, the plate-like body portions each being integrally formed with an inwardly curled rim portion at their upper peripheries and both side peripheries and formed with a pair of laterally spaced joint portions at both sides of the hinge portion, the inwardly curled rim portions and the joint portions being engaged with each other in a condition where the headrest frame has been folded at its hinge portion to oppose the plate-like portions to one another and a pair of laterally spaced clamp members each formed with a cylindrical hinge portion retained in frictional engagement with the horizontal portion of the support rod and a pair