Device comprising: - a sliding element; - at least one guide oriented in the displacement direction of said sliding element; and - at least one tension spring mechanism (18, 19) counter to the force of which the sliding element is displaceable across at least part of the sliding path thereof such that at least part of the displacement in the opposite direction is supported or able to be carried out as a result of the spring force, wherein the at least one tension spring mechanism (18, 19) comprises at least one spring as well as a rotatably mounted cable drum which contains said spring and has a tension element or a cable which, counter to the force of the spring, is able to be unwound from said cable drum, wherein a housing of the at least one tension spring mechanism (18, 19) is disposed in the region of the guide, and the end of the tension element or of the cable (20, 21) is able to be coupled to the sliding element, characterized in that the sliding element is a sliding door or centre door which is displaceable towards two opposite sides; and two spaced-apart tension spring mechanisms (18, 19) acting in opposite directions by way of stationary mating hooks (24, 25) are in each case disposed in the region of the guide; and the sliding door or centre door in turn has two hook-type protrusions (26, 27) which are formed from two hook pieces; wherein the stationary mating hooks (24, 25) of the tension spring mechanisms (18, 19) are disposed in a displacement path of the hook-type protrusions (26, 27) of the sliding door or centre door, as a result of which the sliding door or centre door in the displacement thereof in one or the other direction is able to be selectively coupled to the cable of the one tension spring mechanism or to the cable of the other tension spring mechanism; and wherein each mating hook (24, 25) has two parallel hook pieces having a spacing which differs from that of the hook-type protrusions on the sliding door or centre door. - a sliding element; - at least one guide oriented in the displacement direction of said sliding element; and - at least one tension spring mechanism (18, 19) counter to the force of which the sliding element is displaceable across at least part of the sliding path thereof such that at least part of the displacement in the opposite direction is supported or able to be carried out as a result of the spring force, wherein the at least one tension spring mechanism (18, 19) comprises at least one spring as well as a rotatably mounted cable drum which contains said spring and has a tension element or a cable which, counter to the force of the spring, is able to be unwound from said cable drum, wherein a housing of the at least one tension spring mechanism (18, 19) is disposed in the region of the guide, and the end of the tension element or of the cable (20, 21) is able to be coupled to the sliding element, characterized in that the sliding element is a sliding door or centre door which is displaceable towards two opposite sides; and two spaced-apart tension spring mechanisms (18, 19) acting in opposite directions by way of stationary mating hooks (24, 25) are in each case disposed in the region of the guide; and the sliding door or centre door in turn has two hook-type protrusions (26, 27) which are formed from two hook pieces; wherein the stationary mating hooks (24, 25) of the tension spring mechanisms (18, 19) are disposed in a displacement path of the hook-type protrusions (26, 27) of the sliding door or centre door, as a result of which the sliding door or centre door in the displacement thereof in one or the other direction is able to be selectively coupled to the cable of the one tension spring mechanism or to the cable of the other tension spring mechanism; and wherein each mating hook (24, 25) has two parallel hook pieces having a spacing which differs from that of the hook-type protrusions on the sliding door or centre door.