Lordosis Support

Abstract

The invention relates to a lumbar support for a seat backrest, having a lumbar support basket 12 arranged in a frame 10 of a seat backrest, a pulling device which changes the position of the lumbar support basket 12 relative to the frame, characterised in that the pulling device has two pull cables 16, 17 which are coupled to the lumbar support basket 12 and the frame in such a way that when tension is exerted on the pulling device the lumbar support basket 12 is moved relative to the plane defined by the frame 10 of the seat backrest.

1 - 8 . (canceled) 
   
   
       9 . Lumbar support for a seat backrest, having
 a lumbar support basket arranged in a frame of a seat backrest,   a pulling device with a Bowden cable, the actuator of the Bowden cable being attached to the frame, wherein the pulling device changes the position of the lumbar support basket relative to the frame and has two pull cables which are coupled to the lumbar support basket and the frame in such a way that when tension is exerted on the pulling device the lumbar support basket is moved relative to the plane defined by the frame of the seat backrest,   
     wherein the first pull cable runs from one frame side to the other frame side, and the second pull cable runs from the actuator up to a guiding device attached to the lumbar support basket, in which the pull cables are movably guided, the two pull cables being coupled to each other at the guiding device in such a way that when tension is exerted on the second pull cable the cable length of the first pull cable between the two frame sides is effectively shortened. 
   
   
       10 . Lumbar support for a seat backrest, having
 a lumbar support basket arranged in a frame of a seat backrest,   a pulling device which changes the position of the lumbar support basket relative to the frame and which has two pull cables which are coupled to the lumbar support basket and the frame in such a way that when tension is exerted on the pulling device the lumbar support basket is moved relative to the plane defined by the frame of the seat backrest, wherein the pulling device is a Bowden cable, the actuator of the Bowden cable being attached to the frame,   
     wherein the pull cables are running from the actuator together up to a guiding device attached to the lumbar support basket in which the pull cables are movably guided, and are branching at the guiding device, each pull cable running from the branching up to the frame, to which it is fastened. 
   
   
       11 . Lumbar support according to  claim 10 , wherein both pull cables are fastened by one of their ends to the frame. 
   
   
       12 . Lumbar support according to  claim 10 , the pull cables upon the branching being diverted in opposite directions and fastened to opposite sides of the frame. 
   
   
       13 . Lumbar support according to  claim 10 , wherein when tension is exerted on the pulling device the regions of the pull cable from the fastening to the frame up to the guiding device are shortened, whereby the lumbar support basket is displaced relative to the plane defined by the frame.