Seat device

Abstract

A desk chair device including a base frame with a pedestal and a chair structure with a seat and a backrest, wherein a pivot mechanism is provided, via which the chair structure is mounted on the base frame for pivoting movement about a horizontal pivot axis between a work position and a reclining position. The pivot axis is arranged with respect to the base frame in a fixed position above the seat approximately in the region of a center of gravity of the chair structure.

1 . A desk chair device comprising a base frame with a pedestal and a chair structure with a seat and a backrest,
 wherein   a pivot mechanism is provided, by means of which the chair structure is mounted on the base frame such that it can be made to pivot, about a horizontal pivot axis, between a work position and a reclining position, wherein the pivot axis is arranged with respect to the base frame in a fixed position above the seat at least approximately in the region of a center of gravity of the chair structure together with a person using the chair structure as intended.   
     
     
         2 . The desk chair device as claimed in  claim 1 , wherein the chair structure comprises a chair structure support, wherein the seat and/or the backrest is/are mounted such that it/they can be adjusted relative to the pivot axis and attached to the chair structure support in at least two different positions. 
     
     
         3 . The desk chair device as claimed in  claim 1 , wherein the seat and the backrest are rigidly connected in order to transfer a displacement movement of the backrest to the seat. 
     
     
         4 . The desk chair device as claimed in  claim 1 , wherein the pivot mechanism comprises two support elements which are assigned to the base frame and are arranged at the side of the chair structure, and two cranks which are assigned to the chair structure and are mounted on the support elements such that they can be made to pivot. 
     
     
         5 . The desk chair device as claimed in  claim 1 , wherein the pivot mechanism comprises at least two curved guides which are arranged concentrically. 
     
     
         6 . The desk chair device as claimed in  claim 5 , wherein the two curved guides are assigned to the chair structure and are mounted displaceably in a counterstay assigned to the base frame. 
     
     
         7 . The desk chair device as claimed in  claim 5 , wherein a profile of the bending line of the two curved guides is optimized for a pivoting movement. 
     
     
         8 . The desk chair device as claimed in  claim 1 , wherein the pivot mechanism comprises two articulation devices, each of which has at least one upper arm and one lower arm which is articulated to the upper arm such that it can be made to rotate about an arm axis, wherein the upper arm is articulated to the base frame such that it can be made to rotate about a base axis, the lower arm is articulated to the chair structure such that it can be made to rotate about an end axis, the base axis, the arm axis and the end axis of each articulation device intersect with each other in each case at a central point and the line connecting the two central points defines the pivot axis. 
     
     
         9 . The desk chair device as claimed in  claim 8 , wherein the two articulation devices are constructed symmetrically with respect to the plane of symmetry between the two central points. 
     
     
         10 . The desk chair device as claimed in  claim 8 , wherein the end axes run in a common normal plane to the pivot axis. 
     
     
         11 . The desk chair device as claimed in  claim 7 , wherein the base axes lie in a common plane. 
     
     
         12 . The desk chair device as claimed in  claim 1 , wherein the chair structure comprises a legrest which can be displaced between a use position and a stowed position. 
     
     
         13 . The desk chair device as claimed in  claim 12 , wherein the legrest is articulated to the chair structure such that it can be made to pivot. 
     
     
         14 . The desk chair device as claimed in  claim 12 , wherein the legrest is mounted such that it can be pushed and folded into a drawer.