Shaft arrangement for a functional device of a garden-irrigation system, having: - a shaft housing, which is to be embedded in the ground, - a cover arrangement, and - a pivot-joint arrangement with an essentially horizontal pivot axis, wherein the pivot-joint arrangement has at least one pivot joint, - wherein the shaft housing has - an upper shaft opening, - a shaft interior, and - a shaft upper side, and - wherein the cover arrangement has - a cover, - wherein the cover can be pivoted about the essentially horizontal pivot axis in the pivot joint, - which cover is formed by: - a cover surface, - a more or less linear abutment surface, and - joint supports, which are located at opposite ends of the cover surface, as seen in relation to the pivot axis, and - which bear cover-side parts of the pivot-joint arrangement, - wherein, when the cover is in a closed position on the shaft upper side, the more or less linear abutment surface of the cover defines a peripheral curve with the fixed shaft housing, - wherein the cover, in the closed position, closes the upper shaft opening and, in an open position, at least partially frees the shaft opening for access into the shaft interior from above, - wherein, in the open position, the cover surface, which in the closed position is oriented upwards, is shifted, at least in part, into the shaft interior, characterized - in that the pivot axis is arranged beneath the peripheral curve and is positioned, as seen in vertical projection, within the projection surface of the shaft opening closed by the cover in the closed position, and - the cover surface has the predominant proportion of its surface located closer to the pivot axis than corresponds to the radial distance of the peripheral curve from the pivot axis at the respective associated axial position for the shaft opening on that side of the cover which dips beneath the peripheral curve. - a shaft housing, which is to be embedded in the ground, - a cover arrangement, and - a pivot-joint arrangement with an essentially horizontal pivot axis, wherein the pivot-joint arrangement has at least one pivot joint, - wherein the shaft housing has - an upper shaft opening, - a shaft interior, and - a shaft upper side, and - an upper shaft opening, - a shaft interior, and - a shaft upper side, and - wherein the cover arrangement has - a cover, - wherein the cover can be pivoted about the essentially horizontal pivot axis in the pivot joint, - which cover is formed by: - a cover surface, - a more or less linear abutment surface, and - joint supports, which are located at opposite ends of the cover surface, as seen in relation to the pivot axis, and - which bear cover-side parts of the pivot-joint arrangement, - a cover, - wherein the cover can be pivoted about the essentially horizontal pivot axis in the pivot joint, - which cover is formed by: - a cover surface, - a more or less linear abutment surface, and - joint supports, which are located at opposite ends of the cover surface, as seen in relation to the pivot axis, and - which bear cover-side parts of the pivot-joint arrangement, - wherein the cover can be pivoted about the essentially horizontal pivot axis in the pivot joint, - which cover is formed by: - a cover surface, - a more or less linear abutment surface, and - joint supports, which are located at opposite ends of the cover surface, as seen in relation to the pivot axis, and - which bear cover-side parts of the pivot-joint arrangement, - a cover surface, - a more or less linear abutment surface, and - joint supports, which are located at opposite ends of the cover surface, as seen in relation to the pivot axis, and - which bear cover-side parts of the pivot-joint arrangement, - wherein, when the cover is in a closed position on the shaft upper side, the more or less linear abutment surface of the cover defines a peripheral curve with the fixed shaft housing, - wherein the cover, in the closed position, closes the upper shaft opening and, in an open position, at least partially frees the shaft opening for access into the shaft interior from above, - wherein, in the open position, the cover surface, which in the closed position is oriented upwards, is shifted, at least in part, into the shaft interior, - in that the pivot axis is arranged beneath the peripheral curve and is positioned, as seen in vertical projection, within the projection surface of the shaft opening closed by the cover in the closed position, and - the cover surface has the predominant proportion of its surface located closer to the pivot axis than corresponds to the radial distance of the peripheral curve from the pivot axis at the respective associated axial position for the shaft opening on that side of the cover which dips beneath the peripheral curve.