We know that people can't live and work without seats, especially those who work in a sitting position spend more than 1 / 3 of their time dealing with seats every day. Therefore, in addition to the proper use of materials and generous and beautiful appearance, the more important thing of seat design is to comply with ergonomics

The principle of seat design is that the sitting physiological characteristics of human body must be fully considered in seat design. Let the people sitting on it get better.

The most natural posture is standing upright. When standing upright, the spine is basically S-shaped. However, compared with it, sitting posture is more conducive to the blood circulation in the lower part of the body and can reduce the muscle fatigue of the lower limbs. However, when people sit, the pelvis tilts backward, which makes the sacrum at the lower end of the back tilt, and the spine changes from S-shape (normal state) to arch, which makes the intervertebral disc under great pressure, resulting in low back pain and other diseases. Therefore, the seat design should ensure the minimum disc pressure.

The inclination of different seat surfaces will lead to different intradiscal pressure and back muscle load. Because the greater the inclination of the seating surface, when working at the desk, the body will lean forward, resulting in an increase in the pressure in the intervertebral disc and the consistency of the chest muscles.

When the angle between the seat surface and the backrest is more than 110 °, the intervertebral disc pressure decreases significantly, so the human upper body will feel most relaxed when it tilts 110 ° - 120 °, and the back leaning angle of the sofa is based on this design standard. In addition, waist pads and armrests can also reduce the pressure on the intervertebral disc. The position of the waist pad shall be at the third to fifth lumbar vertebrae, and the thickness of the waist pad shall be about 5cm.