Exercise chair

Abstract

An exercise chair includes a front leg unit which is pivotably connected with a rear leg unit. A seat having a link is connected between a front end of the front leg unit and the seat, and a pivot unit is pivotably connected between a rear end of the seat and a lower end of a back rest. Two positioning plates are connected to two sides of the back rest and each positioning plate has a plurality of positioning holes. Two positioning pins each removably extend through the rear leg unit and one of the positioning holes so as to position the back rest at different angles.

1 . An exercise chair comprising: 
 a front leg unit;    a rear leg unit pivotably connected to the front leg unit;    a seat having a link connected between a front end of the front leg unit and the seat;    a pivot unit pivotably connected between a rear end of the seat and a lower end of a back rest, which includes a third bar and two third side rods extend from two ends of the third bar, the two third side rods are pivotably connected to the rear end of the seat, and at least a flexible member is connected between the first bar of the front leg unit and the second bar of the rear leg unit to hold the third bar with the tension;    two positioning plates connected to two sides of the back rest and each positioning plate having a plurality of positioning holes, and    two positioning pins each removably extending through the rear leg unit and one of the positioning holes so as to position the back rest at different angles.    
     
     
         2 . The chair as claimed in  claim 1 , wherein the front leg unit includes a first bar and two first side rods extend from two ends of the first bar, two support members are connected to the two first side rods, the rear leg unit includes a second bar and two second side rods extend from two ends of the second bar, the two second side rods are engaged with the two support members.  
     
     
         3 . The chair as claimed in  claim 2 , wherein each of the support members includes two sidewalls and each sidewall has a through hole which is in alignment with one of the positioning holes of the positioning plate corresponding thereto, the pins each extend through the through hole and one of the positioning holes so as to position the back rest such that the back rest is not pivoted about the seat.  
     
     
         4 . The chair as claimed in  claim 2 , wherein the rear leg unit has two arm rests connected to the two second side rods.  
     
     
         5 . (canceled)  
     
     
         6 . The chair as claimed in  claim 1 , wherein the positioning holes are equally spaced from each other.