Device for a seating furniture

Abstract

A device for an item of seating furniture, in particular a pivot mechanism, and an item of seating furniture having such a device, are provided. In order to simplify the construction of items of seating furniture, the use of a deformation element which is integral, that is to say integrated into the device, which is deformable, which is composed preferably of a plastics material, and which serves as an energy storage member, is proposed.

1 - 14 . (canceled) 
     
     
         15 . A device for an item of seating furniture, the device comprising:
 a base support, a seat support and a backrest support;   a rearward pivoting of said backrest support inducing a following movement of said seat support;   at least one elastically deformable element serving as an energy storage member, said at least one elastically deformable element being integrated in single-piece form into the device;   said at least one elastically deformable element connecting said seat support to said base support as a single-piece seat support-base support combination, permitting said seat support to move relative to said base support.   
     
     
         16 . The device according to  claim 15 , wherein said at least one elastically deformable element is deformable upon an exertion of a load on the device exerted to cause a movement of the device. 
     
     
         17 . The device according to  claim 15 , wherein said at least one elastically deformable element is composed of a plastics material. 
     
     
         18 . The device according to  claim 15 , wherein said at least one elastically deformable element has multiple members or structure planes acting in parallel and having stiffnesses dependent on a direction of an action of a force acting thereon, causing said at least one elastically deformable element to deform differently in a manner dependent on the direction of the action of the force. 
     
     
         19 . The device according to  claim 15 , which further comprises a multi-jointed coupling gear, one elastically deformable element being formed as an integral constituent part of said coupling gear, as a coupler or as part of a coupler. 
     
     
         20 . The device according to  claim 19 , wherein said at least one elastically deformable element has a multiplicity of virtual centers of rotation providing an infinite joint gear for the device. 
     
     
         21 . The device according to  claim 15 , wherein the device provides a pivoting movement not being implementable without a deformability of said at least one elastically deformable element. 
     
     
         22 . The device according to  claim 21 , wherein said backrest support pivots through a pivot angle greater than 5° during the pivoting movement. 
     
     
         23 . The device according to  claim 15 , wherein said at least one elastically deformable element is the only energy-storing structural part of the device. 
     
     
         24 . The device according to  claim 15 , which further comprises a film joint connecting said backrest support and said seat support to one another in a single-piece form to allow the following movement of said seat support during a rearward pivoting of said backrest support. 
     
     
         25 . The device according to  claim 24 , wherein said film joint has at least two film joint elements having mutually different spatial positions. 
     
     
         26 . The device according to  claim 15 , wherein the device is a single-piece assembly including said backrest support, said seat support and said base support. 
     
     
         27 . The device according to  claim 26 , wherein said single-piece assembly has characteristics of having been produced by a single filling of a single injection molding tool. 
     
     
         28 . An item of seating furniture or an office chair, comprising a device according to  claim 15 . 
     
     
         29 . The device according to  claim 15 , wherein the device is a pivot mechanism.