Structure of a single-part elastic waist support

Abstract

An elastic waist support is installed between a back frame and a mesh member of a chair, and can be adjusted in height; the back frame consists of a front frame part, and a rear frame part, which are firmly joined together; the mesh member covers a front side of the front frame part with a periphery thereof being sandwiched between the front and the rear frame parts; the back frame has two opposite supporting extensions protruding from inward sides of two longitudinal portions thereof; each of the supporting extensions has a guiding groove thereon; the waist support has two joining protrusions thereon, and it is joined on the back frame with the joining protrusions being respectively embedded in the guiding grooves.

1 . Structure of a single-part elastic waist support,
 the elastic waist support being installed between a back frame and a mesh member of a chair; the back frame having two opposite supporting extensions protruding from inward portions thereof; each of the supporting extensions having a guiding groove thereon;   the elastic waist support having two joining protrusions thereon; the elastic waist support being joined on the back frame with the joining protrusions being inserted in the guiding grooves respectively;   the elastic waist support having a plurality of holes thereon.   
   
   
       2 . The single-part elastic waist support structure as claimed in  claim 1 , wherein the back frame consists of a front frame part, and a rear frame part, and the mesh member covers a front of the front frame part with a portion thereof being sandwiched between the front and the rear frame parts.