Polycentric hinge for a knee brace and knee brace comprising such a polycentric hinge

A polycentric hinge configured to support a joint of a user, comprising:

• a first hinge arm and a second hinge arm;
• a third hinge arm and a fourth hinge arm;
• a hinge body configured for hinging together the first, second, third, and fourth hinge arms, each hinge arm having a first end pivotally enclosed inside said hinge body and a second end, the second ends of the second and fourth hinge arms are pivotally fixed to a first mounting frame, and the second ends of the first and third hinge arms are pivotally fixed to a second mounting frame;
• characterized in that the hinge body is provided with a plurality of pivoting pins adapted to engage said first ends of each of the first, second, third, and fourth hinge arms to define four different and spaced apart rotation axes extending transversally with respect to a longitudinal axis of the hinge body and in that the first ends of the third hinge arm and the fourth hinge arm are connected to each other, so that a rotation of the first mounting frame with respect to the second mounting frame causes a rotation of the third and fourth hinge arms around their respective rotation axes.