Chair provided with a backrest

A chair which comprises:

• a support base;
• a seat which is movable forwardly and rearwardly, said seat comprising a front part and a rear part, wherein the front part is pivotably supported by the support base;
• a balancing member positioned below the seat so as to extend longitudinally, said balancing member having a front portion, a rear portion, and a fulcrum set between the front portion and the rear portion so that said front portion is movable upwardly and downwardly, said balancing member being supported by said support base at the fulcrum;
• a backrest provided on the rear portion of the balancing member;
• seat receiving means for pivotally connecting the rear part of said seat to the rear portion of said balancing member;
• and
• motion translating means for operably connecting the front portion of said balancing member to the front part of said seat, said motion translating means translating an upward movement of said front portion of said balancing member to a forward movement of said seat.