PROBLEM TO BE SOLVED: To provide a leg strength support device capable of automatically adjusting torque generated by a swing motion by automatically adjusting rigidity of a joint that makes a swing motion, and reducing power consumption or a load on a user further.SOLUTION: A leg strength support device includes a waist side installation part 2 installed on a waist side of a user, a first swing arm 13 disposed on the side of the thigh of the user where a recessed shape or a protruding shape which plays the role of a swinging shaft is formed on the upper part, a thigh installation part 19 attached to the first swing arm and applied to the thigh of the user, a driving shaft member 6 for supporting the recessed shape or the protruding shape which plays the role of the swinging shaft of the first swing arm, and supporting the first swing arm swingably with respect to the waist side installation part, rigidity varying means for varying the rigidity which is torque per unit angle displacement required for swinging the first swing arm, and control means for controlling the rigidity varying means. The rigidity varying means is composed of an expansion and contraction spring 24, a spring fixing member 23, rigidity adjusting means 21, a spring arm 25, and a spring storage body 26.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】揺動運動する関節の剛性を自動的に調整することで揺動運動によって発生するトルクを自動的に調整し、消費電力あるいはユーザの負荷をより低減することができる、脚力支援装置を提供する。【解決手段】利用者の腰側部に装着される腰側装着部2と、利用者の大腿の側方に配置されて上部に揺動の軸となる凹形状又は凸形状が形成された第1揺動アーム13と、第1揺動アームに取り付けられて利用者の大腿にあてがわれる大腿装着部19と、第1揺動アームの揺動の軸となる凹形状又は凸形状を支持して腰側装着部に対して第1揺動アームを揺動自在に支持する駆動軸部材6と、第1揺動アームを揺動させるために必要とする単位角度変位あたりのトルクである剛性を可変とする剛性可変手段と、剛性可変手段を制御する制御手段と、を備え、剛性可変手段は伸縮バネ24とバネ固定部材23と剛性調整手段21とバネアーム25とバネ収容体26にて構成されている。【選択図】図1
