Designing a Chair should take into consideration the principle of weight distribution and can be easily controlled in the Chair seat, adjustable height and tilt. A good Chair must make people sit and sit in the correct style. The weight should fall, hip or buttocks, not the fall cone stand. The height of the Chair should not be as high as the length between the ground pin, because the tissue area to Cone cone legs, unable to stand the pressure like hips or buttocks area of tissue. I designed a nine-seat too low will cause the angle between the torso and the leg is a cone angle, which can cause a painful abdominal area. The Chair is too high, the pressure would falling cone stand area. Make a cone stand out and if the seats are modified by moving the hips forward and leaning a chair which is located within the port of seat discomfort. Result in a portion of the spinal bend curve. The rear backrest must have characteristics that support the lower back is fixed. Look in the appropriate category of the area chairs has a mechanism to rotate the adjustable arm to stay level with the height of the elbow. When the arm is hanging down and the forearm is in a position 90° with forearm sleeve accommodation must not interfere with the movement of working.
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