The invention relates to the technical field of office chairs, in particular to an ergonomic
office chair and a using method thereof. The ergonomic
office chair comprises a supporting plate, supporting legs, a fixing plate, a frame plate and a protruding plate, the left end of the protruding plate is fixedly connected with a spring, the left end of the spring is fixedly connected with a hanging plate, the top end of the hanging plate is fixedly connected with the bottom end of the supporting plate, and the top end of the supporting plate is fixedly connected with a
backup plate. Two via holes are formed in the middle of the
backup plate, adjusting plates corresponding to the via holes are arranged at the right end of the
backup plate, adjusting devices are arranged at the ends, away from the middle of the backup plate, of the adjusting plates,
extrusion shafts are fixedly connected to the middles of the adjusting plates, a wide plate is fixedly connected to the right ends of the
extrusion shafts, a longitudinal plate is fixedly connected to the right portion of the top end of the supporting plate, and a
servo motor is installed on the upper portion of the right end of the longitudinal plate. The output shaft end of the
servo motor is fixedly connected with a connecting plate, trigger blocks are fixedly connected to the upper portion and the lower portion of the left end of the connecting plate, and the left end of each trigger block makes contact with the right end of the corresponding wide plate. A user can lie down to have a rest conveniently, the user can be massaged conveniently, and practicability is high.