A Dual Function Chair for Sitting and Kneeling

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.

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.

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.

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.

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.