and means for tensioning the canopy,which canopy tensioning means comprise a set of first tensioning members and a set of second tensioning members, where in the first ten-ioning members are each pivotally connected with one first outer end to the rod and extend thereform along the canopy to a position close to the periphery thereof,and wherein the second tensioning members are each pivot-ally connected with a first outer end to the operating means and are connected with a second outer end to a corresponding first tensioning member,wherein the connection between the first and second tensioning members is arranged closer to the periphery of the canopy than to the rod,and is preferably situated sub-stantially close to the periphery of the canopy.