Patent ID: 7639508

Claim:
A fastening of a built-in unit on a switchboard including a through-opening through which a rear part of the built-in unit is plugged from the switchboard front side, the rear part of the built-in unit and a contour and size of the through-opening corresponding to one another, a collar being arranged on the built-in unit to limit the action of plugging through the built-in unit, the fastening comprising: at least one fixing and clamping device on the rear part of the built-in unit to enable the built-in unit to assume an intended position on the switchboard and to enable the collar to be pressed with such a pressure against the switchboard that sealing of the through-opening device including holders arranged on both sides of the built-in unit, and at least two holding lugs, spaced apart from one another, arranged on a mount to engage in corresponding at least one of depressions and apertures of the built-in unit, each mount including, to fit the built-in unit, a web which runs transversely with respect to the mount and on which a slide, which latches in stepwise in the direction of the mount, is movable toward the switchboard rear side, to press the holding lugs against the at least one of depressions and apertures and thus fix the built-in unit in the through-opening at first in the intended position, and wherein the holding lugs are pressed so severely against the at least one of depressions and apertures via clamping elements, arranged on the mount to press against the switchboard rear side, that sealing of the through-opening takes place.