Mechanism for handling a surgical instrument

An actuation mechanism for a surgical instrument, comprising:

• a sleeve, equipped with a longitudinal axis, configured to receive the surgical instrument and comprising one or more parts extending substantially in a plane perpendicular to said longitudinal axis, a plurality of studs extending along the longitudinal axis being provided on each of the one or more parts, on some parts only, or distributed over the different parts;
• at least two wheels, mounted on the sleeve on either side of said part or parts along said longitudinal axis, each wheel being equipped with at least one groove and a mechanical transmission element, said at least one groove of each wheel movably receiving one of said plurality of studs in said groove;
• at least two drive shafts, including a first drive shaft equipped with a first mechanical transmission element cooperating with the mechanical transmission element of one of the two wheels and a second drive shaft (214) being equipped with another first mechanical transmission element cooperating with the mechanical transmission element of the other of the two wheels.