Abstract
We have developed a walking prosthetic devices for a person with mildly disabled lower limbs to go up/down steps and to utilize ordinary toilets. This device comprises two modules: a powered knee prosthetic device and a pair of telescopic crutches. We show the conceptual design of the walking prosthetic devices. In this paper we mainly discuss the telescopic crutch. This crutch has no actuator and its length is switched between two levels; it assists the person when standing up and sitting down in the short length state, while it maintains the body stability in a standing position when traveling in the long length state. We also show the results of the withstanding load of the crutches.
