Seat board of chair and a student chair using thereof

摘要

The present invention discloses a chair seat plate and a student chair using the same. The seat plate of the present invention is mounted horizontally on the leg frame of the chair to support the buttocks of the seated person. The seat plate is formed at a predetermined depth at the rear center of the upper surface, and is formed of a long oval in the left and right direction to accommodate a part of the seated seat of the seater. And a hip recess having an approximately inverted trapezoidal cross section, respectively located on both front sides of the hip recess, and having an open front and curved surface with a predetermined curvature in the left and right directions to accommodate a part of the thigh of the seated person. It comprises a femoral recess. A local pressure preventing groove is formed between the buttocks and the thigh recess to communicate with the buttocks recess, and the tailbone receiving groove is formed to communicate with the buttocks recess at the rear center of the buttocks recess.;The present invention distributes the load concentrated at the two ends of the sciatic nodules relatively evenly throughout the buttocks so that you can sit comfortably on the chair for a long time without any change in posture.