Abstract
This research is not the high technological power assist system. The aim of this development is the making goods as simple as possible and more economically, and be able to exchange the conventional cloth supporter. Almost all the conventional knee supporter works by flexing the knee joint, and not be found by using mechanical suspension. Now we invent the mechanical supporter system. This system works only when the knee feels shock, and don't work other way. So the people attached this system can move the legs smoothly, like when he does the stretching exercise. We apply the combination spring and pneumatic system, and check availability by simulation.