Exercise chair

Abstract

The invention relates to an exercise chair comprising a foot, a seat and an upper body support member, wherein a ball and socket joint is provided between the foot ( 2 ) and the chair seat ( 1 ). The ball and socket joint comprises a ball head ( 4 ) and a socket ( 5 ) being provided with a spherical hole, and is preferably provided with means for limiting its swivelling motion. There may be foot rests ( 13 ), preferably stirrups connected to the seat ( 1 ) and the upper body support member ( 8 ) may be formed as a handhold ( 10 ). Another object of the invention is a swivelling unit for converting a conventional chair to an exercise chair. It comprises a lower plate ( 14 ) to be fixed on the support rod of the conventional chair and an upper plate ( 15 ) to be fixed to the bottom of the seat of the conventional chair, wherein there is a ball and socket joint between the lower plate ( 14 ) and the upper plate ( 15 ).

1 . An exercise chair comprising a foot, a seat and an upper body support member, characterized in that there is a ball and socket joint between the foot ( 2 ) and the chair seat ( 1 ), wherein the ball and socket joint comprises a ball head ( 4 ) and a socket ( 5 ) being provided with a spherical hole, is provided with means for limiting and/or switching off its swivelling motion, and there are foot rests ( 13 ) connected to the seat ( 1 ). 
     
     
         2 . The exercise chair as claimed in  claim 1 , characterized in that the foot rests ( 13 ) are stirrups. 
     
     
         3 . The exercise chair as claimed in  claim 1 , characterized in that the upper body support member ( 8 ) is formed as a handhold ( 10 ). 
     
     
         4 . The exercise chair as claimed in  claim 1 , characterized in that said means for limiting the swivelling motion of the ball and socket joint is the socket ( 5 ) being provided with a conical part adjoining the spherical hole, together with a stop bush intruding into said conical part. 
     
     
         5 . (canceled) 
     
     
         6 . The exercise chair as claimed in  claim 4 , characterized in that a fixing pin ( 7 ) is provided for holding said stop bush ( 6 ) in the designed height on the support rod. 
     
     
         7 - 12 . (canceled) 
     
     
         13 . The exercise chair as claimed in  claim 1 , characterized in that it is provided with an electronic display ( 12 ). 
     
     
         14 . Swivelling unit for converting a conventional chair to an exercise chair as claimed in  claim 1 , characterized in that it comprises a lower plate ( 14 ) to be fixed on the support rod of the conventional chair and an upper plate ( 15 ) to be fixed to the bottom of the seat of the conventional chair, wherein there is a ball and socket joint between the lower plate ( 14 ) and the upper plate ( 15 ). 
     
     
         15 . Swivelling unit as claimed in  claim 14 , characterized in that the ball and socket joint comprises a ball head ( 4 ) connected to one of the plates ( 14 ,  15 ) and a supporting block ( 16 ) provided with a spherical nest and connected to the other plate ( 15 ,  14 ). 
     
     
         16 . Swivelling unit as claimed in  claim 14 , characterized in that the supporting block is provided with a conical part adjoining the spherical nest, for limiting the swivelling motion of the ball head ( 4 ). 
     
     
         17 . Swivelling unit as claimed in  claim 14 , characterized in that it is provided with a latch for locking the ball head ( 4 ).