Abstract: A walker is a device to help the old persons who walk inconveniently and the crippled people to walk on their own and devote to leg functional training. The paper discusses about the concept of humanity design of this device, studies the physical and mental demands of the old and crippled people, makes an analysis on human-machine relationship of this device, offers the dimensions of some key parts for accomplishing the overall design and detailed design of a foldable walker based on the requirements of stability and comfort property. This foldable walker not only has the functions of assistance in walking, entertainment and alarming, but also can be changed to a seat for rest and be folded for storage and transport. The detailed design schemes are given for the state of being an aiding walker, being a seat and being folded.

Key words: industrial design, design of a walker, humanity design, folding walker