Chair with an Automatically Adjustable Lumbar Support

Abstract

The invention relates to a chair ( 1 ), in particular an office chair, with a backrest ( 3 ) which is connected in an articulated manner to a mount ( 33 ) by means of a backrest mount ( 2 ) and has an adjustable lumbar support ( 4 ) and also a seat surface ( 12 ) which is attached to the mount ( 33 ), so that the inclination position of the backrest ( 3 ) and the adjustment position of the lumbar support ( 4 ) are coupled to one another by means of a coupling element ( 10 ) in such a way that a tilting movement of the backrest ( 3 ) towards the rear causes the adjustment position of the lumbar support ( 4 ) to change, in particular causes the lumbar support ( 4 ) to relax, and a tilting movement of the backrest ( 3 ) towards the front likewise causes the adjustment position of the lumbar support ( 4 ) to change, in particular causes the lumbar support ( 4 ) to tense.

1 . A chair ( 1 ), in particular office chair, with a backrest ( 3 ) which is articulated on a carrier ( 33 ) via a backrest carrier ( 2 ) and has an adjustable lumbar support ( 4 ), and with a seat surface ( 12 ) which is attached to the carrier ( 33 ) such that the inclination position of the backrest ( 3 ) and the adjustment position of the lumbar support ( 4 ) are coupled to each other via a coupling element ( 10 ) in such a manner that a rearwardly directed tilting movement of the backrest ( 3 ) causes a change in the adjustment position of the lumbar support ( 4 ), in particular relaxation of the lumbar support ( 4 ), and a forwardly directed tilting movement of the backrest ( 3 ) likewise causes a change in the adjustment position of the lumbar support ( 4 ), in particular tensioning of the lumbar support ( 4 ). 
   
   
       2 . The chair as claimed in  claim 1 , wherein the coupling element is attached by a first end region to the lumbar support and by a further end region to the seat surface of the chair. 
   
   
       3 . The chair as claimed in  claim 1 , wherein that end region of the coupling element which is attached to the seat surface is attached to a fastening element of the seat surface. 
   
   
       4 . The chair as claimed in  claim 1 , wherein the coupling element is a cable pull. 
   
   
       5 . The chair as claimed in  claim 4 , wherein the cable pull has at least one locking element for setting the lumbar support in the relaxed position. 
   
   
       6 . The chair as claimed in  claim 1 , wherein the lumbar support comprises supporting regions. 
   
   
       7 . The chair as claimed in  claim 1 , wherein the lumbar support can be transferred by actuation of the coupling element from a substantially curved, tensioned position into a substantially rectilinear, relaxed position. 
   
   
       8 . The chair as claimed in  claim 1 , wherein the coupling element is integrated in the backrest carrier of the backrest. 
   
   
       9 . The chair as claimed in  claim 8 , wherein the backrest carrier of the backrest has a recess for receiving the coupling element. 
   
   
       10 . The chair as claimed in  claim 1 , wherein the backrest carrier of the backrest has an integrated adjustment element for adjusting the height of the backrest in relation to the backrest carrier.