A large auxiliary force can be generated to assist the user to return to an upright state.A corrugated body in which the first end is connected to the first pulley and the second end is connected to the second end is wound around the outer peripheral surface of the first pulley and the second pulley, and an elastic body for urging the force corresponding to the rotation angle of the first pulley to the first pulley is applied to the first rotary shaft, which is the rotation axis of the first pulley, is applied to the first pulley It is built.The second pulley rotates by the urging force of the elastic body to roll the rope like body into the first pulley, and the rope like body is disengaged from the second pulley to rotate the second pulley.With the rotation of the second pulley, the small gear which rotates about the second rotary shaft together with the second pulley and the large gear engaged with the small gear rotate, and the large gear rotates the leg rod through the transmission mechanism.The outer diameter of the second pulley is larger than the outer diameter of the first pulley, and the number of teeth of the large gear is larger than that of the small gear.Diagram【課題】大きな補助力を発生させて、使用者が直立状態へ戻るのを補助することができる。【解決手段】第１プーリに第１端が連結され、第２プーリに第２端が連結された索状体は、第１プーリ及び第２プーリの外周面に巻回されており、第１プーリの回転軸である第１回転軸には、第１プーリの回転角度に応じた力を第１プーリに付勢する弾性体が設けられている。弾性体の付勢力により第１プーリが回転して索状体を第１プーリに巻回し、かつ索状体を前記第２プーリからほどくことで第２プーリが回転する。第２プーリの回転により、第２プーリと共に第２回転軸を中心に回転する小ギア及び小ギアと嵌合可能な大ギアが回転し、伝達機構を介して大ギアが下肢ロッドを回転させる。また、第２プーリの外径は第１プーリの外径より大きく、大ギアの歯数は小ギアの歯数より多い。【選択図】図１
