A trim assembly having a trim element and a first concealing element extending away from the trim element and being movable relative to the trim element. The trim assembly further includes at least one second rigid concealing element, extending from the trim element to the first concealing element and designed to conceal the space between the trim element and the first concealing element. The second concealing element is secured to the trim element and is biased against part of the first concealing element so as to bear against that part of the first concealing element in all positions of the first concealing element with respect to the trim element.