The invention relates to a passive
body weight supporting
exoskeleton device based on
gait phase self-unlocking. The passive
body weight supporting
exoskeleton device comprises a seat mechanism and supporting mechanisms arranged at the two sides of the seat mechanism; each supporting mechanism comprises a
thigh mechanism, a
knee joint mechanism and a shank mechanism; the seat mechanism comprises an arc seat, sliding block plates,
thigh connecting rods, pulleys, limiting hooks and pull rings, the limiting hooks are installed on the bottom face of the seat, a guide rail groove is formed in the seat, the pulleys are fixedly connected with the corresponding sliding block plates through screws and are movably clamped in the guide rail groove of the seat, the pull rings are movably arranged on the side faces of the sliding block plates, and the upper portions of the
thigh connecting rods are rotationally connected with the sliding block plates; the thigh mechanisms are connected with the corresponding thigh connecting rods in a fastened mode, and the pull rings are connected with the thigh mechanisms through steel wires; the lower portions of the thigh mechanisms are connected with the upper portions of the
knee joint mechanisms in a fastened mode, and the lower portions of the
knee joint mechanism are connected with the shank mechanisms in a fastened mode. Self-unlocking of knee joints can be completed automatically according to the
gait phase without manual operation.