INTEGRAL CHAIR AND CONTROLLER

摘要

PURPOSE: To ergonomically improve seating comfortability of a chair, by shifting the position of a common shaft to turn around the chair back to the seat keeping the adjacent space with the hip joint of a user. CONSTITUTION: Front part 37 of the chair seat 6 moves downward and rearward along the arch rail as a spring 145 bends downward and the chair back 5 tilts rearward since a guide 147 has a downward arch shape. Rear of the chair seat 6 would turn clockwise to the chair back 5 since the carrier face 93 and its engageable carrier pad 95 have both upward arch shape. Common shaft 7 rotates around the back pivot 10 along the arch together with the hip joint H-point 13 on keeping the adjacent space relation between the common shaft 7 and the H-point 13. Concurrently, the chair seat 6 and the chair back 5 rotate relatively around the rotary common shaft 7 to cause a synchronous tilting movement of the chair. Combination of these rotary motions would give the user considerably natural and comfortable bending reaction and a comfortable back support keeping pulling of shirts reduced.