Ergonomic seat and back structure for a chair.

摘要

A seat and back construction for an ergonomic office chair. An ergonomically functioning inner shell (41) is mounted on a chair structure in a manner that does not interfere with the flexible characteristics of the inner shell. An outer rigid shell (95) is provided to transfer static and dynamic loads applied to the back portion (45) of the inner shell by an occupant directly to the chair structure without interfering with the flexible characteristics of the inner shell.