PROBLEM TO BE SOLVED: To provide a motion assisting device capable of suppressing a positional deviation of a thigh-mounted part while a thigh arm member arranged along a thigh and a mounted part to be mounted on the thigh are being slidable along the longitudinal direction of the thigh.SOLUTION: A motion assisting device comprises a waist joint part that is located on a lateral side of a human bodys waist joint and couples a waist arm member with a thigh arm member to be capable of relatively rotating, a first mounting part coupled with the waist arm member to be mounted on a human bodys wasit part, a second mounting part mounted on a human bodys thigh part, a slide mechanism that couples the thigh arm member with the second mounting part to be relatively slidable in a longitudinal direction of a thigh member, a support member coupled with the second mounting part to extend downward along the thigh part, a knee joint part that couples the thigh arm member located on a lateral side of a human bodys knee joint to extend along a human bodys leg part with the support member to be capable of relatively rotatable, and a leg mounting part coupled with the leg arm member to be mounted on a part of the leg part which keeps the thickness enlarged downward.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】大腿部に沿って配置される大腿部アーム部材と大腿部に装着される装着部とを大腿部の長さ方向に沿ってスライド可能にしつつ、大腿部装着部の位置ずれを抑制可能な動作補助装置を提供する。【解決手段】動作補助装置は、人体の腰関節の側方に位置し、腰部アーム部材及び大腿部アーム部材を相対回転可能に連結する腰部関節部と、腰部アーム部材に連結されて人体の腰部に装着される第1の装着部と、人体の大腿部に装着される第2の装着部と、大腿部アーム部材及び第2の装着部を、大腿部の長さ方向へ相対的にスライド可能に連結するスライド機構と、第2の装着部に連結されて大腿部に沿って下方に延びる支持部材と、人体の膝関節の側方に位置し、人体の下腿部に沿って延びる下腿部アーム部材及び支持部材を相対回転可能に連結する膝部関節部と、下腿部アーム部材に連結され、下腿部のうち、下方に向かって太さが拡大する部位に装着される下腿部装着部とを備える。【選択図】図1
