Ergonomic chair design principles
When we sit and use the computer, the main parts of the human body involved are: head, eyes, neck, shoulders, back, waist, hands, and legs. Among them, the waist is the most important. After sitting for a long time, back pain is everywhere.
The core of the ergonomic chair design principle is to design around these parts, the purpose is to make people sit comfortably.
head:
The head, eyes, and neck are integrated. Normally, in a standardized sitting posture, the eyesight line of sight is parallel to the front platform, which also depends on the free height adjustment of the ergonomic chair; the back pillow of the head and the neck can fit the chair naturally. The best, no need to apply force to fit, and no need to over-extend the neck, the natural bending angle from the head to the middle of the neck fits. Many ergonomic chairs out there don't have a headrest, which I don't think fits very well.
Back:
The waist is located in the middle part of the human body under the hips and ribs, and is distributed on both sides of the spine. The best support position for the waist is the third and fourth vertebrae. A good ergonomic chair design has a separated and movable lumbar support, that is, the best support point for the entire waist can be flexibly adjusted up and down. After sitting for a long time in one movement, adjust the waist Depending on the height to support the different positions of the waist. The back part of the lumbar is an arc. The separated movable lumbar concentrates the rebound force on the movable lumbar. After the arc is fitted, the back spine can be greatly relaxed and the waist muscles can be relieved from overwork and soreness.
hand:
The armrest design of the ergonomic chair can properly relax the hands, wrists, elbows, arm muscles, arms and shoulders. The appropriate length and width of the armrests, plus the appropriate adjustment of the height and angle of the armrests, greatly improve the comfort of the ergonomic chair.
legs:
We see too many engineering chairs ignoring the legs. Some engineering chairs are anti-intellectual in design. The depth of the chair is super large, and the backrest is very deep to the edge of the chair. What caused this is that my knee joints are all on the cushion; there are some The depth of the cushion is very shallow, and the edge of the chair is not a small slope. When I sit on it, the thigh muscles are pressed, reminding me that it is time to lose weight.
