Back module for an exoskeleton structure

A back module for an exoskeleton structure, comprising a spinal column segment designed to extend along a spinal column of a user, the spinal column segment comprising a plurality of vertebral elements, stacked on one another, and a flexible connecting element connecting the vertebral elements to one another, the spinal column segment having a stable equilibrium position in which the flexible connecting element holds the vertebral elements supported against one another, and the flexible connecting element being elastic so that, during a movement of the back of the user, the flexible connecting element allows a movement of the vertebral element with respect to one another, while exerting a return force tending to return the spinal column segment to the stable equilibrium position, and

• one or more electrical transmission or data transmission cable(s) extending inside the spinal column segment through each of the vertebral elements, for connecting a battery and/or actuators and/or sensors to a control module of the exoskeleton structure, or for connecting two control modules of the exoskeleton structure.