| 摘要 |
The end of a second medial external skeletal member (117), which is fitted on the inside of the instep, is disposed so that the ankle has degrees of freedom of motion with respect to a flat plate member (121). A convexity (CV), which can be held in a concavity (CC) formed in a lateral holding member (125), is formed on the end of a second lateral external skeletal member (112A), which is fitted on the outside of the instep. In a closed leg position, the convexity (CV) of the second lateral external skeletal member (112A) is held in the concavity (CC) of the lateral holding member (125) and the entire bottom surface of the flat plate member (121) is in contact with the floor. When shifting from said closed leg position to an open leg position, the convexity (CV) of the second lateral external skeletal member (112A) disconnects from the concavity (CC) of the lateral holding member (125), making it possible to keep the entire bottom surface of the flat plate member (121) in contact with the floor. When shifting from said open leg position to the closed leg position, a plate spring member (140) is restored while in contact with the convexity (CV) of the second lateral external skeletal member (112A) and guides said convexity (CV) to the concavity (CC) of the lateral holding member (125). |
