Vehicle-opening/closing-body driving device

A vehicle-opening/closing-body driving device to drive an opening/closing body pivotably supported to a vehicle body, comprising:

• a driving assembly provided in either one of the opening/closing body and the vehicle body to have a driving actuator;
• a casing fixed in the opening/closing body or the vehicle body in which the driving assembly is provided to house the driving assembly;
• and
• a coupling mechanism coupling the driving assembly and the other of the opening/closing body or the vehicle body, which is inserted through the casing in a direction parallel to a pivoting locus plane of the opening/closing body such that one end portion of the coupling mechanism is protruded from the opening/closing body or the vehicle body in which the casing is fixed to be pivotably supported to the other of the opening/closing body or the vehicle body and the other end portion of the coupling mechanism is inserted into an inside of the opening/closing body or the vehicle body to which the casing is fixed, the coupling mechanism driving the opening/closing body to open and close with a driving force of the driving actuator by being pushed toward a side of the one end portion relative to the casing and by being retracted toward a side of the other end portion relative to the casing,
• wherein an output shaft of the driving actuator and the coupling mechanism are arranged to be parallel on a plane perpendicular to the pivoting locus plane, and
• wherein the coupling mechanism is pivotably supported in the casing by a pivoting shaft in a direction perpendicular to the pivoting locus plane to pivot with respect to the casing accompanied with the opening/closing operation of the opening/closing body.