Strong Collapsible Chair

Abstract

A strong collapsible chair has a frame and a soft panel attached to the frame. The frame has right and left front tube legs, right and left rear legs, right and left armrest bars pivotally linked to respect right front and right rear legs and respect left front and left rear legs, right and left front lower legs slidably inserted in respective right and left front tube leg, right and left front feet fixed to right and left front lower legs, right and left front supporters respectively fixed to right and left front legs, a pair of front scissoring bars, right and left seat bars, right and left backrest bars, right and left first sleeves, right and left reinforcement bars, right and left rear feet, and a pair of rear scissoring bars.

1 . A strong collapsible chair comprising a frame and a soft panel attached to the frame,
 the soft panel having a backrest portion and a seat portion, and,   the frame having a right front tube leg and an identical left front tube leg each having an upper end and a lower end,   a right rear leg and an identical left rear leg each having an upper end and a lower end,   a right armrest bar having a front portion pivotally linked to the upper end of the right front leg, a middle portion pivotally linked to the upper end of the right rear leg, and a rear portion,   a left armrest bar having a front portion pivotally linked to the upper end of the left front leg, a middle portion pivotally linked to the upper end of the left rear leg, and a rear portion,   a right front lower leg having a lower end and an upper end telescopically slidably inserted in the right front tube leg,   a left front lower leg having a lower end and an upper end telescopically slidably inserted in the left front tube leg,   a right front foot securely fixed to the lower end of the right front lower leg,   a left front foot securely fixed to the lower end of the left front lower leg,   a right front supporter securely formed on the right front tube leg,   a left front supporter securely formed on the left front tube leg,   a pair of front scissoring bars lower ends thereof being respectively pivotally linked to the left front foot and the right front foot and upper ends thereof being respectively pivotally linked to the right front supporter and the left front supporter,   a right seat bar having a front portion pivotally linked to the right front supporter, a middle portion, and a rear portion,   a left seat bar having a front portion pivotally linked to the left front supporter, a middle portion, and a rear portion,   a right backrest bar having an upper portion, a middle portion pivotally linked to the rear portion of the right armrest bar, and a lower portion pivotally linked to the rear portion of the right seat bar,   a left backrest bar having an upper portion, a middle portion pivotally linked to the rear portion of the left armrest bar, and a lower portion pivotally linked to the rear portion the left seat bar,   a first right sleeve slidably covering on the upper portion of the right backrest bar,   a first left sleeve slidably covering on the upper portion of the left backrest bar,   a right reinforcement bar having a lower end pivotally linked to the right front foot, a middle portion pivotally linked to the middle portion of the right seat bar, and an upper end pivotally linked to the first right sleeve,   a left reinforcement bar having a lower end pivotally linked to the left front foot, a middle portion pivotally linked to the middle portion of the left seat bar, and an upper end pivotally linked to the first left sleeve,   a right rear foot securely fixed to the lower end of the right rear leg,   a left rear foot securely fixed to the lower end of the left rear leg, and,   a pair of rear scissoring bars lower ends thereof being respectively pivotally linked to the left rear foot and the right rear foot and upper ends thereof being respectively pivotally linked to the first right sleeve and the first left sleeve.   
     
     
         2 . The strong collapsible chair as claimed in  claim 1 , wherein the frame further has a second right sleeve slidably covering on a middle portion of the right rear leg and pivotally linked to a rear most portion of the right seat bar, and a second left sleeve slidably covering on a middle portion of the left rear leg and pivotally linked to a rear most portion of the left seat bar.