Patent ID: 7748783
Filing Date: 2010-07-06
Classification: A47C

Abstract:
1. A chair comprising: a backrest and a seat, the seat including a front and a back and the backrest being attached to the back of the seat and comprising: a front side and a back side; a frame including a pair of frame elements extending in a vertical direction and arranged at right and left sides of the backrest, a flexible support member configured to bridge the pair of frame elements and support a load of a body of a person seated against the front side of the backrest, wherein the flexible support member is configured to bend concave rearward so as to wrap around a back and lumbar of the body of the person seated; and an adjustment mechanism including a pin and a plate, the pin being coupled to the flexible support member and including a shaft portion, the plate being coupled to one of the frame elements and including a lone hole portion extending in a direction of the width of the backrest and a round hole portion housed below the long hole portion, wherein the long hole portion and round hole portion are arranged to integrally form a through hole; wherein the adjustment mechanism is configured to allow variance in the amount of concave rearward bend of the support member as a result of the load of the body of the person seated against the front side of the backrest through movement of the pin relative to the plate from a first state in which the shaft of the pin is engaged with an inner side edge of the round hole portion to a second state in which the shaft of the pin is engaged with an inner side edge of the long hole portion.