Office chair with high-technology armrest equipped with integrated control buttons for adjusting the movements of the seat and the seat back

An armrest for an office chair, the chair having a seat back and a seat plane, the armrest comprising:

• a tubular upright member;
• a static support surface connected to an upper end of said upright member;
• a first means, positioned at a front end of said support surface, for releasing movement of the seat plane and an inclination of the seat back;
• a second means, arranged in side-by-side relationship with said first means at said front end of said support surface, for activating for activating a locking of the seat plane and the inclination of the seat back, said first means comprising:
• a control button;
• an elastically retracted first lever having an end pivotally mounted at a rear part of said support surface, said elastically retracted first lever having said control button at an opposite end thereof;
• a stay rod extending in said support surface in linear co-axial alignment with said upright member, said stay rod longitudinally movable within said support surface;
• a guide pin linking said first lever to said stay rod such that a pivoting movement of said first lever causes a corresponding longitudinal movement of said stay rod;
• and
• a flexible cable extending through said upright member and connected at one end to said stay rod, said second means comprising:
• a second lever having an end pivotally connected in said support surface, said second lever having a retaining cog therein, said retaining cog cooperative with said stay rod so as to retain said stay rod in a fixed position at a point along the longitudinal movement thereof;
• a control button positioned at an opposite end of said second lever;
• and
• an elastically retracted lever pivotally mounted at a rear part of said support surface, said retaining cog of said second lever having a profile in an upper portion thereof engageable with said retracted lever of said second means.