A kinematic mechanism for controlling a first rotating element and a second rotating element (A, B) having respective axes of rotation (x A , x B ) which are parallel to each other and arranged at a fixed distance from each other, the kinematic mechanism comprising a support (W), a toothed driving element movably mounted on the support (W) and comprising teeth , hereinafter referred to as driving teeth, a first driven toothed element rotatably mounted on the support (W) and adapted to be rigidly connected to the first rotating element (A), said first driven toothed element comprising a first toothed sector and a second toothed sector which are coaxial with the axis of rotation (x A ) of the first rotating element (A) and have a different modulus, wherein the first toothed sector engages with the driving teeth , and a second driven toothed element rotatably mounted on the support (W) and adapted to be rigidly connected to the second rotating element (B), said second driven toothed element comprising a toothed sector , hereinafter referred to as the third toothed sector, which engages with the second toothed sector of the first driven toothed element , characterized in that the second toothed sector comprises a first toothing portion located axially above the first toothed sector , and a second inclined toothing portion (32") that extends from the first toothing portion and has an end arranged next to the first toothed sector , and in that the third toothed sector comprises a first toothing portion that engages with the first toothing portion of the second toothed sector and is arranged at a different axial height from the first toothed sector , and a second inclined toothing portion (41") that engages with the second toothing portion (32") of the second toothed sector and extends from the first toothing portion of the third toothed sector , said second toothing portion (32") of the second toothed sector having an end arranged at a different axial height from the first toothing portion of the third toothed sector . a support (W), a toothed driving element movably mounted on the support (W) and comprising teeth , hereinafter referred to as driving teeth, a first driven toothed element rotatably mounted on the support (W) and adapted to be rigidly connected to the first rotating element (A), said first driven toothed element comprising a first toothed sector and a second toothed sector which are coaxial with the axis of rotation (x A ) of the first rotating element (A) and have a different modulus, wherein the first toothed sector engages with the driving teeth , and a second driven toothed element rotatably mounted on the support (W) and adapted to be rigidly connected to the second rotating element (B), said second driven toothed element comprising a toothed sector , hereinafter referred to as the third toothed sector, which engages with the second toothed sector of the first driven toothed element , characterized in that the second toothed sector comprises a first toothing portion located axially above the first toothed sector , and a second inclined toothing portion (32") that extends from the first toothing portion and has an end arranged next to the first toothed sector , and in that the third toothed sector comprises a first toothing portion that engages with the first toothing portion of the second toothed sector and is arranged at a different axial height from the first toothed sector , and a second inclined toothing portion (41") that engages with the second toothing portion (32") of the second toothed sector and extends from the first toothing portion of the third toothed sector , said second toothing portion (32") of the second toothed sector having an end arranged at a different axial height from the first toothing portion of the third toothed sector . <EOS>