PROBLEM TO BE SOLVED: To provide a motion support device capable of reducing a load applied to knee joints or foot joints of a wearer.SOLUTION: A motion support device includes: a body member 10, upper leg members 20, lower leg members 30 and foot members 40 each of which is arranged corresponding to the body, thigh parts, lower thigh parts and foot parts of a wearer, and which are connected with each other rotatably in directions in which each joint of the wearer bends or extends an actuator 14 provided at the body member 10, and for rotating the upper leg members 20 with respect to the body member 10 a detection part 81 for detecting whether the wearer is in a standing state or in an idling state a power control part 83 for controlling the operation of the actuator 14 according to the detection result of the detection part 81 and a viscosity attenuation mechanism 50 provided between two members continuously connected to each other out of the upper leg members 20, the lower leg members 30 and the foot members 40, and for attenuating one of the two members rotating with respect to the other member in a first rotation direction in which the knee joints of the wearer bend or the foot joints of the wearer extend.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】装着者の膝関節または足関節にかかる負担を低減できる動作支援装具を提供する。【解決手段】装着者の胴体、大腿部、下腿部および足部にそれぞれが対応して配置され、かつ、装着者の各関節が屈曲および伸展する方向に回転自在に互いに接続されている胴体部材10、上脚部材20、下脚部材30および足部材40と、胴体部材10に設けられ、上脚部材20を胴体部材10に対して回転させるアクチュエータ14と、装着者が立脚状態であるか遊脚状態であるかを検出する検出部81と、検出部81の検出結果に応じてアクチュエータ14の動作を制御する動力制御部83と、上脚部材10、下脚部材20および足部材30のうちの連続して接続されている2つの部材の間に設けられ、装着者の膝関節が屈曲するまたは足関節が伸展する第1の回転方向に、2つの部材の一方の部材が他方の部材に対して回転することを減衰させる粘性減衰機構50と、を備える。【選択図】図1
