A Dual Function Chair for Sitting and Kneeling

Abstract

The object of the invention is a convertible, dual function chair for sitting and kneeling, which gives the possibility of changing the position and relieving the spinal column during a prolonged work in a sitting position. The dual function chair for sitting and kneeling is equipped with a movable backrest and headrest support, shaped in the lower part in such a way that its displacement changes the size of the chair simultaneously vertically and horizontally. It is also equipped with a sliding-rotating-returning or a sliding-returning backrest device, which makes it follow the user's back and support it accurately at every angle of inclination of the backrest when tilting the backrest. It is also equipped with a headrest connected to the headrest arm through a rotary-sliding mechanism, which rotationally connects with the backrest support, and has a specially shaped five-star base, in which the arms, apart from the fragment above the wheels, are maximally flattened and located as low as possible above the ground.

1 - 5 . (canceled) 
     
     
         6 . A dual function chair for sitting and kneeling, the chair comprising:
 a seat,   a backrest,   a headrest,   a kneeler,   a movable backrest and headrest support supporting the backrest and the headrest and having a lower part, the lower part shaped such that its movement changes the size of the chair simultaneously vertically and horizontally for adjustment to the size of a user of the chair.   
     
     
         7 . A dual function chair for sitting and kneeling, the chair comprising:
 a seat,   a backrest,   a kneeler,   a backrest support by which the backrest is supported and to which the backrest is pivotally connected, and   a backrest spring for pivoting the backrest for maintaining the backrest against a user's back.   
     
     
         8 . The chair of  claim 7  wherein the backrest is also slidingly connected to the backrest support, the chair further comprising a backrest sliding spring for maintaining the backrest against a user's back. 
     
     
         9 . A dual function chair for sitting and kneeling, the chair comprising:
 a seat,   a backrest,   a kneeler,   a backrest support by which the backrest is supported and to which the backrest is slidingly connected, and   a backrest sliding spring for maintaining the backrest against a user's back.   
     
     
         10 . A dual function chair for sitting and kneeling, the chair comprising:
 a seat,   a backrest connected to a backrest support,   a kneeler, and   a headrest rotationally connected to a headrest arm around a headrest rotation axis, the headrest arm is rotationally connected to the backrest support around a headrest arm rotation axis, the distance between the headrest rotation axis and the headrest arm rotation axis is greater than  200  mm.   
     
     
         11 . The chair of  claim 10 , wherein the headrest is also slidingly connected to the headrest arm. 
     
     
         12 . A dual function chair for sitting and kneeling, the chair comprising:
 a rotationally displaceable seat,   a backrest,   a kneeler, and   a base, the base having five outwardly extending arms and five wheels, each arm having a central portion and an outward end, the wheels being connected to the arms at the outward ends, the wheels having tops, the arms along the central portion being below the tops.