Exoskeleton structure that provides force assistance to the user

An exoskeleton subassembly comprising:

• a first exoskeleton part,
• a second exoskeleton part,
• a connecting assembly connecting the first exoskeleton part to the second exoskeleton part, the connecting assembly comprising a guide fixedly mounted with respect to one of the first exoskeleton part and the second exoskeleton part, and a pin fixedly mounted with respect to the other of the first exoskeleton part and the second exoskeleton part, the pin being slidably mounted inside the guide between a first end position and a second end position,
• wherein the connecting assembly further comprises a limiting device arranged to allow rotation of the pin with respect to the guide when the pin is in the first end position, and to oppose rotation of the pin with respect to the guide when the pin is in the second end position,
• the limiting device comprising an elastic element with which the first exoskeleton part engages when the pin is in the second end position, the elastic element exerting on the first exoskeleton part an elastic return force tending to oppose relative rotation between the first exoskeleton part and the second exoskeleton part both in a first direction of rotation and in a second direction of rotation, opposite to the first direction of rotation,
• wherein the first exoskeleton part has a protrusion, and the elastic element has a recess in which the protrusion is received when the pin is in the second end position.