Ergonomic chair

Abstract

The ergonomic chair comprises at the upper end of the chair column, a supporting arm on which the front end of the seat supporting frame is articulated for pivoting vertically. At the rear end of the seat supporting frame, a back rest is connected to the seat supporting frame and the supporting arm by means of a movement guiding and return mechanism so that an alteration in the inclination of the back rest automatically causes a proportional alteration in the inclination of the seat supporting frame. The movement guiding and return mechanism is divided into two structural units which are separate in construction. The one is a linkage mechanism which is effective between a back-rest connection construction, the seat supporting frame and the supporting arm, with a movement lock which is effective when the chair is in the position of rest. The other structural unit is constructed in the form of a spring mechanism which can be locked and which applies a force to the chair column between the back-rest connection construction and the supporting arm, through which the back rest and the seat supporting frame are restored from a backwardly inclined position into a normal initial position.