PROBLEM TO BE SOLVED: To provide a knee joint structure which allows a swing phase control with a mechanical configuration without requiring electric control.SOLUTION: The knee joint structure for a prosthetic leg includes: a restraint generating member 31 whose one end is engaged with a lower thigh member 2 and a cam 32 which is engaged with a thigh member 1 so as to be relatively turned and whose end is engaged with the other end of a restraint generating member 31 so as to control the driving speed of the restraint generating member 31.COPYRIGHT: (C)2010,JPO&INPIT【課題】電気的制御を必要とせず機械的な構成で遊脚相制御の可能な膝関節構造を提供すること。【解決手段】下腿部材2に一端部が係合した抑制力発生部材31と、大腿部材1に係合して相対回動すると共に端部が抑止力発生部材31の他端部に係合して抑制力発生部材31の駆動速度を制御するカム32と、を有することを特徴とする義肢の膝関節構造。【選択図】図1
