Connection device and item of furniture or domestic appliance

A device, the device configured to connect a movable sliding element of an item of furniture to a guide rail of a guide system of the item of furniture, or configured to connect a movable sliding element of a domestic appliance, to a guide rail of a guide system of the domestic appliance, wherein the device comprises a main component and a height adjustment element, which has a ramp shape that extends from a minimum height position to a maximum height position, wherein the height adjustment element is configured to be pivotable, or rotatable, in a reciprocating manner about a pivot axis, or a rotation axis, along a stationary shell face of the main component, wherein an operating element, which comprises a projecting latching member, is connected to the height adjustment element, and the operating element is configured to be pretensioned in a latching direction extending towards a plurality of latching teeth, which are disposed along the stationary shell face of the main component, such that the latching member is configured to engage a detent between two immediately adjacent latching teeth of the plurality of latching teeth in a self-locking manner, wherein when the operating element is pushed in a direction opposite to the latching direction, the latching member is disengaged from the detent between the two immediately adjacent latching teeth of the plurality of latching teeth and the height adjustment element is configured to be pivoted, or rotated, wherein the height adjustment element is moved to a position either at or between the minimum height position and the maximum height position to cause a positional modification of the sliding element relative to the guide system, such that a spatial modification of the sliding element relative to the guide rail is achieved.