The major objective of this paper is to solve a synthesis problem, namely the design of a mechanism with a double oscillating slide that has the role of rotating a rocker at 180°; the relationships between the lengths of the elements that ensure its rotation without blocking are established. The geometric model of the mechanism was made in the Autodesk Inventor program and imported in the Altair Inspire program. The kinematic analysis of the mechanism was performed in Altair Inspire program and its working was validated.