Adjustable backrest and headrest for seat has swiveling linkage with connecting rod tilting headrest forward as backrest is tilted toward reclining position

摘要

The backrest (1) is pivoted on a hinge member (11) fastened to the seat (2). A short lever (9) is hinged (5) at one end to a hinge point below and to the rear of the hinge for the backrest. The middle of the short lever is connected to a link (10) whose other end is hinged to the bottom end of the backrest. As the backrest is moved from the upright to the reclining position. The short lever swings rearward through an angle of 180 degrees. A long rod (7) is hinged to the end of the short rod, and pushes the hinged (6) headrest (4) forward.