PROBLEM TO BE SOLVED: To provide a motion assist device that enables a relative rotation of a foot support part in accordance with bending and stretching motions of the metatarsophalangeal joint associated with walking motions of a user, thereby making it possible to secure a relatively large contact area of the foot support part.SOLUTION: The motion assist device comprises: a frame structure attached to a human body a posterior foot support part on which a sole part posterior to the metatarsophalangeal joint of the human body may be disposed a foot joint part positioned laterally to a foot joint of the human body and configured to relatively rotatably couple the frame structure and the posterior foot support part an anterior foot support part on which a sole part anterior to the metatarsophalangeal joint may be disposed and a foot support part joint part that relatively rotatably couples the anterior foot support part and the posterior foot support part and may be positioned laterally to the metatarsophalangeal joint of the human body.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】ユーザの歩行動作に伴う中足指節関節の曲げ伸ばし動作に対応して足台部の相対回転を可能にして、足台部の接地面積を比較的大きく確保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、人体に装着されるフレーム構造と、人体の中足指節関節よりも後方の足底部が配置され得る後方足台部と、人体の足関節の側方に位置し、フレーム構造及び後方足台部を相対回転可能に連結する足関節部と、中足指節関節よりも前方の足底部が配置され得る前方足台部と、前方足台部及び後方足台部を相対回転可能に連結し、人体の中足指節関節の側方に位置し得る足台部関節部と、を備える。【選択図】図2
