What is the height of the chair back?

According to the normal chair size in daily life, the design is as follows:

Height of sitting surface: 400-450 mm;

Seat width: generally 400—500mm；;

Height of backrest: 480—630mm；;

Angle between backrest and sitting surface: 95— 105.

Seat height; The height of the sitting surface should be 380-450 mm, and the seat should be designed to be adjustable in height to meet the needs of operators with different figures.

Sitting width: the sitting width should meet the needs of hip sitting, so that people can freely adjust their sitting posture.

Height of backrest: Backrest can be divided into waist backrest and shoulder backrest, and most workplace seats belong to waist backrest. It is best to leave a certain space (above 70-80 mm) between the lower edge of the backrest and the sitting surface to accommodate the hip muscles squeezed backwards.

Angle between backrest and seat surface: the angle between backrest and seat surface is less than 90, which will compress the abdomen, while the angle is too large, which will reduce people's alertness.