Anatomic desk chair comprising backrest with frame having a tire-type assembly system

Abstract

The present invention relates to an anatomic desk chair for office or home work, which has a displacement system composed by a plurality of wheels which allow the user to move from one location to another, wherein the chair is characterized by comprising a backrest having a frame with a tire-type assembly system, i.e. wherein the backrest as such is made of an elastomeric material and is assembled in the frame by pressure and these are adjusted through a series of screws attaching the frame and the counter-frame. Thus, the assembly system is composed by a back support or “skeleton” which corresponds to a piece injected in an elastomer requiring of a stretching process subsequent to the injection in order to obtain the shape and dimension sufficient to assembly in the frame with a tire-type system, after such skeleton-frame assembly the counter-frame is assembled through screws as previously indicated.

We claim: 
     
         1 . An ergonomic chair comprising:
 a backrest, including a mesh for directly supporting the back of the user when using the ergonomic chair;   a frame located around the mesh;   a counter-frame which facilitates the attachment of the mesh and the frame to the ergonomic chair;   a seat section including a base, supporting in its upper part a cushion, a back support, which allows the connection between the seat and the backrest, and a vertical movement system corresponding to a lever which allows the chair to displace, according to a selection of a user, in a direction of at least one of vertically upwards, vertically downwards, tilting forward, tilting backward and a combination thereof;   a lumbar support system located in the lower part of the backrest and placed in direct contact with the mesh and a back support of the backrest which joins the backrest and the seat; and   a movement and support system located in the lower part of the chair connected to the seat with a chair central support which corresponds to a column inserted directly in the back support of the seat, wherein the assembly between the mesh, the frame and the counter-frame is a tire-type assembly system.   
     
     
         2 . The ergonomic chair according to  claim 1 , wherein the mesh of the backrest is made of an elastomer and is directly assembled in the frame by a tire-type system assembly. 
     
     
         3 . The ergonomic chair according to  claim 1 , wherein said frame is assembled in the counter-frame by at least on screw which passes through both the frame and the counter-frame. 
     
     
         4 . The ergonomic chair according to  claim 1 , wherein the lumbar support is assembled with the back support of the backrest by at least one screw passing through the counter-frame. 
     
     
         5 . The ergonomic chair according to  claim 1 , wherein the lumbar support system includes a lumbar and a sacral support, wherein the lumbar support system further includes a tension adjustable horizontal axis and a tension adjustable vertical axis, and wherein said sacral support is located lower than the lumbar support. 
     
     
         6 . The ergonomic chair according to  claim 1 , wherein the movement and support system includes a plurality of extensions, wherein each of the plurality of extensions includes a distal end having at least one wheel. 
     
     
         7 . The ergonomic chair according to  claim 1 , further comprising at least one support system for arms. 
     
     
         8 . The ergonomic chair according to  claim 7 , wherein each of the at least one support system for arms includes an extension, wherein the extension protrudes from the base and extends upward, wherein said extensions includes at least one armrest having a flat upper surface made of a padded material.