Patent ID: 7857390
Filing Date: 2010-12-28
Classification: A47C

Abstract:
1. A body support structure having a base, on which at least one seat is articulated, the seat comprising a seat part and a back part, an inclination of the seat about at least one axis of rotation being supported by at least one spring mechanism acting between the seat and the base, the spring mechanism comprising a lever arm and a support, the support being movable out of a position of rest into different working positions, the support assuming the position of rest when the seat is nonloaded, the support assuming one of the working positions as a function of a weight force with which a person sitting in an upright sitting posture loads the seat, the support being movable freely of an engaging force, which can be generated by the lever arm, between its position of rest and one of the working positions, as long as the person is sitting on the seat in the upright sitting posture, the support being engaged by the lever arm by means of the engaging force when the person reclines from his upright sitting posture against the back part into a rearwardly inclined sitting posture, a reaction force of the spring mechanism on the seat being adaptable to the respective weight force of the person by means of the working position of the support.