CHAIR WITH BACKREST AND ROTATING DAMPER DEVICE

摘要

A forward end part of an arm part 53 of a seatback frame is connected to a forward end part of a main frame 3 such that the forward end part of said arm part 53 can turn about a horizontal axis 61extending leftward and rightward. A cam hole 71 is formed in a forward end part of the arm part 53. A shaft part 72 movably engageable with the cam hole 71 through a roller 73 is disposed at a forward end part of a seat frame 41. The cam hole 71, the shaft part 72 and the roller 73 constitute a positive motion mechanism 70 for causing a seat frame 41 to be tilted in accordance with the turning motion of the arm part 53. <IMAGE>