Cover for an electronic equipment, which cover comprises a first and a second metal panel element (210,220,230,240), where respective first and second metal surfaces of the said panel elements are arranged to be mechanically joined together with good electric contacting using a connector (290,292,300) comprising a contacting device, characterised i n that the contacting device comprises: a) an elongated metal compression spring part, associated with a direction of elongation and also a direction of motion along the said direction of elongation, which spring part is wave-shaped whereby it comprises a plurality of alternating crests and valleys, so that the spring part is arranged to be compressed, against the spring force, between the two respective metal surfaces in a press plane which is perpendicular to the direction of the spring force, whereby the outsides of the crests are pressed against the first metal surface and the outsides of the valleys are pressed against the second metal surface; b) a hook part arranged on the spring part, arranged to grip around an edge (231a,232a) of the first panel element (230,240) and thereby, when it grips around the edge, prevent that the part of the contacting device being retained by the hook part is displaced in the said direction of movement in relation to the first metal surface; and c) at least one projection, arranged on a surface facing the first metal surface when the hook part grips around said edge, which projection is arranged to display relatively low sliding friction against the first metal surface when the spring part is caused to slide against the first metal surface in the said direction of motion and a relatively high sliding friction when the spring part is caused to slide in the opposite direction, where the latter relatively high sliding friction is higher than the sliding friction between the side of the spring part facing the second metal surface and the second metal surface when the spring part is compressed between the two metal surfaces. a) an elongated metal compression spring part, associated with a direction of elongation and also a direction of motion along the said direction of elongation, which spring part is wave-shaped whereby it comprises a plurality of alternating crests and valleys, so that the spring part is arranged to be compressed, against the spring force, between the two respective metal surfaces in a press plane which is perpendicular to the direction of the spring force, whereby the outsides of the crests are pressed against the first metal surface and the outsides of the valleys are pressed against the second metal surface; b) a hook part arranged on the spring part, arranged to grip around an edge (231a,232a) of the first panel element (230,240) and thereby, when it grips around the edge, prevent that the part of the contacting device being retained by the hook part is displaced in the said direction of movement in relation to the first metal surface; and c) at least one projection, arranged on a surface facing the first metal surface when the hook part grips around said edge, which projection is arranged to display relatively low sliding friction against the first metal surface when the spring part is caused to slide against the first metal surface in the said direction of motion and a relatively high sliding friction when the spring part is caused to slide in the opposite direction, where the latter relatively high sliding friction is higher than the sliding friction between the side of the spring part facing the second metal surface and the second metal surface when the spring part is compressed between the two metal surfaces.