Actuation system for hip orthosis

A monolateral actuation system of a hip articulation, configured to be connected to an orthosis, the monolateral actuation system comprises:

• a motor device arranged to provide assistive torque at a motor axis;
• a transmission device, connected to the motor axis and arranged for transferring the assistive torque onto an output axis corresponding to an axis of flexion-extension of the hip articulation and parallel to the motor axis, the transmission device including at least one cable and at least first and second pulleys connected to one another by the at least one cable, the at least first and second pulleys arranged to variably extend relative to one another;
• a fixed frame for connection to the orthosis, the motor device and the transmission device are mounted on the fixed frame;
• a rotary joint corresponding to a degree of freedom of abduction/adduction of the hip articulation about a respective adduction/abduction axis of the hip articulation, the rotary joint interposed between the fixed frame and the motor device;
• a linear joint interposed between the fixed frame and the rotary joint of hip, the linear joint configured to adjust a horizontal width of the monolateral actuation system on a frontal plane of the user.