Foldable chair

Abstract

A foldable chair can be folded easily by pressing a control member disposed at a lateral side of the seat, and when the control member is released from being pressed, the chair can be returned to the locked position by a spring. In addition to the pivot connection of the corresponding interconnected components, the structure for controlling the pivot motion and locking is also very simple, which not only reduces material cost, but also make production and assembly easier.

What is claimed is: 
     
         1 . A foldable chair comprising:
 a seat formed with at two opposite lateral sides thereof with a first pivot seat and a second pivot seat, respectively, the first pivot portion being formed in a peripheral surface thereof with a stop groove, in the first pivot seat being formed a hollow mounting seat;   a control assembly including a control member and a spring, the control member including a press portion and a rotation-stop portion connected to the press portion, the press portion being formed with an engaging groove, the spring being received in the mounting seat, the mounting seat being inserted in the engaging groove of the control member, and the spring having both ends pressed against the mounting seat and the engaging groove, respectively, the rotation-stop portion of the control member being aligned with the stop groove;   a back including a support panel connected to a first ear and an opposite second ear, respectively, the first and second ears being each formed with an engaging hole, the engaging hole of the first ear being formed around its periphery with a plurality of stop concaves, and each stop concave having a stop surface, the first and second pivot seats of the seat being inserted in the engaging holes of the first and second ears of the back, respectively, in normal conditions, the spring extends and pushes against the control member to make the rotation-stop portions of the control member lean against the stop surfaces of the stop concaves of the first ear, and the rotation-stop portions are disengaged from the stop grooves of the seat;   a positioning cap formed with a through hole and fixed to the first pivot seat of the seat to prevent disengagement of the first ear, and the control member extending out of the through hole the first positioning cap;   a second positioning cap fixed to the second pivot seat of the seat to prevent disengagement of the second ear; and   two arms each including a first connecting member pivoted to a second connecting member, the first connecting member having one end pivoted to the seat, and the second connecting member having one end pivoted to the back.   
     
     
         2 . The foldable chair as claimed in  claim 1 , wherein the first and second pivot seats are formed in a first and second concaves of a first and second pivot portions at the two opposite lateral sides of the seat. 
     
     
         3 . The foldable chair as claimed in  claim 1 , wherein a spring-mounting portion is formed in the engaging groove of the control member, and the spring is mounted on the spring-mounting portion. 
     
     
         4 . The foldable chair as claimed in  claim 1  further comprises a first decorative cap and a second decorative cap which are formed with a plurality of step holes and, respectively, and are further formed around their peripheries with a plurality of hooks respectively, the first and second decorative caps are assembled to the first and second positioning caps by hooking their hooks into the step holes of the first and second positioning caps the first decorative cap is formed with a through hole, and the press portion of the control member extends out of the through holes of the first and second positioning caps. 
     
     
         5 . The foldable chair as claimed in  claim 1 , wherein two stop grooves are formed in the first pivot seat and define an angle therebetween of degrees, the control member includes two rotation-stop portions connected to the press portion, and an angle between the two rotation-stop portions is 180 degrees. 
     
     
         6 . The foldable chair as claimed in  claim 1  further comprises a back cushion which is provided on its rear surface with a plurality of protrusions to be inserted in assembling holes formed in the support panel of the back, and then a plurality of fasteners are inserted through the assembling holes of the back and screwed into the protrusions, so as to fix the back cushion to the back. 
     
     
         7 . The foldable chair as claimed in  claim 1 , wherein a bottom of the seat is connected to a base. 
     
     
         8 . The foldable chair as claimed in  claim 1 , wherein the seat is formed with two pivot holes, the support panel of the back is provided with two protruding blocks, each of the protruding blocks is formed with a pivot hole, the first connecting members are pivoted in the pivot holes of the seat, and the second connecting members are pivoted in the pivot holes of the back. 
     
     
         9 . The foldable chair as claimed in  claim 1 , wherein an engaging cylindrical portion is formed in the second pivot seat, the second positioning cap is formed with a through hole, and the engaging cylindrical portion of the second pivot seat extends out of the through hole of the second positioning cap. 
     
     
         10 . The foldable chair as claimed in  claim 1 , wherein the back is formed with two pivot holes which are in communication with an opening formed in an opposite surface of the support panel, and the openings are each sealed with a cover.