Movement assistance device

A movement assistance device, comprising:

• a thigh frame;
• a lower leg frame;
• a knee joint mechanism which bendably connects the thigh e and the lower leg frame;
• and a joint power generator which generates joint power, which is the power to be imparted to the knee joint mechanism, the movement assistance device being attached to a person to be assisted such that the thigh frame and the lower leg frame move integrally with a thigh and a lower leg, respectively, of a leg of the person to be assisted,
• wherein the knee joint mechanism is composed of two knee joint mechanisms disposed on both inner and outer sides of the knee of a leg of the person to be assisted,
• the thigh frame has a first main frame and a second main frame, which extend in a bifurcated manner, from a base disposed on the outer side of an upper portion of the thigh of the leg of the person to be assisted or on one side of a hip of the person to be assisted and which connect the base to a joint mechanism on an outer side of the knee and a joint mechanism on an inner side thereof, respectively, and a body support member which is extended between the first main frame or the base and the second main frame,
• the first main frame is configured to extend from the base in a longitudinal direction of the thigh along an outer side surface of the thigh to the joint mechanism on the outer side of the knee,
• the second main frame is configured to extend from the base to the joint mechanism on the inner side of the knee via a front surface side of the thigh, and to extend from the base obliquely with respect to the thigh in a direction toward the joint mechanism on the inner side of the knee. as observed from a front side of the thigh, and
• the body support member is configured to extend along a rear surface of the thigh between a portion of the first main frame, which portion is on a lower side with respect to the base, or the base and a portion of the second main frame, which portion is on a lower side with respect to the base, and to be in contact with the rear surface