Patent ID: 7568765

Claim:
A chair with: a) a sub frame ( 1 ) set on a floor; b) a mechanism ( 2 ) set on the sub frame ( 1 ); c) a seat ( 3 ) set on the mechanism ( 2 ); and d) a backrest ( 7 ) attached to the mechanism ( 2 ), the backrest ( 7 ) including a backrest frame ( 5 ) and an elastically deformable backrest part ( 6 ) having a back panel ( 62 ) with a head restraint ( 61 ), the back panel ( 62 ) having a back part ( 60 ) attached to the head restraint ( 61 ), the backrest frame ( 5 ) supporting the elastically deformable backrest part ( 6 ), the back part ( 60 ) and the head restraint ( 61 ) of the back panel ( 62 ) blending uniformly into one another, the head restraint ( 61 ) being divided into a lower, first head section ( 611 ), which fits onto the back part ( 60 ), and an upper, second head section ( 612 ), the first head section ( 611 ) and an adjacent portion of the second head section ( 612 ) forming a neck area ( 613 ), the back part ( 60 ) being divided into an upper, first back section ( 601 ), which fits onto the neck area ( 613 ), and a lower, second back section ( 602 ), the second back section ( 602 ) and an adjacent portion of the first back section ( 601 ) forming a lumbar area ( 603 ), the back part ( 60 ) being capable of pivoting about a first pivot shaft (D 1 ) from an essentially upright, neutral position (B 0 ) to a reclined position (B 1 ), the seat ( 3 ) and the backrest ( 7 ) sized to move synchronically with the back part ( 60 ) when said back part ( 60 ) is moved toward the reclined position (B 1 ), lower means ( 53 , 67 , D 4 ) and upper means ( 55 , 610 , D 5 ) are provided to allow the head restraint ( 61 ) to pivot in a direction opposite to the reclined position (B 1 ) as the back part ( 60 ) moves to the reclined position (B 1 ), the lower means including a lower docking part ( 67 ) provided in the lumbar area ( 603 ), a lower pivot shaft (D 4 ) extending through the backrest frame ( 5 ), the lower pivot shaft (D 4 ) lying on a level with the lumbar area ( 603 ) in a vertical sense, and on which a first preformed part ( 543 ) with a first docking part ( 53 ) is articulated, the first docking part ( 53 ) being attached to the lower docking part ( 67 ), and the upper means including an upper docking part ( 610 ) provided in the neck area ( 613 ), and an upper pivot shaft (D 5 ) lying on a level with the neck area ( 613 ) in a vertical sense and on which a second preformed part ( 563 ) with a second docking part ( 55 ) is articulated; the second docking part ( 55 ) being attached to the upper docking part ( 610 ).