A CHAIR WITH A BACKREST ADJUSTMENT MECHANISM

摘要

A chair with a backrest adjustment mechanism includes a chair (2), a back support board (3), and a driving mechanism (4). The chair (2) has a back portion (23) and a seat portion (24) and formed a space (22) for accommodating an occupant. The back support board (3) is movably mounted in front of the back portion (23). The driving mechanism (4) is operatively mounted between the back support board (3) and the back portion (23), and capable of moving the back support board (3) forward to reduce a seat depth (29) of the chair (2) for accommodating shorter occupant, and moving the back support board (3) backward to enlarge the seat depth (29) of the chair (2) for accommodating taller occupant. By manipulating the driving mechanism (4) of the present invention, both taller and shorter occupants should be able to find a seat depth (29) to accommodate their upper leg length, so as to help occupants maintain proper back support, distributing their weight evenly across the seat portion.