System for controlling a moving part, steering system for a light vehicle and tricycle fitted with said system

A tricycle with a cable steering system comprising:

• at least one steering wheel mounted on a tricycle installed free to rotate about an axis perpendicular to a steering shaft;
• a first pivoting side handle fixed to a first end of a first cable;
• a second pivoting side handle fixed to a first end of a second cable, wherein a second end of the first cable is fixed to a first side of said steering shaft and a second end of the second cable is fixed to a second side of said steering shaft to control the orientation of the steering wheel by pivoting one of the first and second side handles in order to create tension in one of the first and second cables and to cause rotation of the steering shaft;
• a third cable, a first end of which is fixed to the first side handle opposite the first end of the first cable and a second end of which is fixed to the second side handle opposite the first end of the second cable;
• and
• the tricycle further including two propulsion arms, each mounted free to pivot about an approximately horizontal axis, to oscillate each on one side of the tricycle, wherein the first and second side handles are each mounted free to pivot about an approximately horizontal axis, each at the upper end of one of the two propulsion arms,
• wherein the propulsion arms are coupled together so that they are actuated at the same time and in the same direction, to contribute to propulsion of the tricycle, by acting on a connecting rod/crank system linked to two driving wheels, wherein the tricycle has a single traction pedal located on the center line of the tricycle, in front of a driver's seat, on a cranked drive shaft, to drive the two driving wheels of the tricycle.