Abstract: According to the invention, several outward-projecting tongues are formed on the built-in housing part of a parallelepipedal built-in unit and a frame whose inner width is greater than the mounting dimension of the built-in housing, is configured on the front panel that is to be fixed on the built-in housing part. Grooves which are allocated to the tongues and corresponding sliding surfaces are formed on the interior of the frame, the grooves and surfaces cooperating with certain elasticity in the frame to form a one-way snap-on connection.

Abstract: A printer with an elongated media output port is disclosed. The printer may be used for a digital tachograph of a motor vehicle. The printer includes at least one bearing surface which limits the media output in the transverse direction and along which the printing medium slides during output. The boundary conditions for the operation of a small-format printer in a digital tachograph of a motor vehicle makes it necessary that the media output port has to be sealed off against the ingress of harmful media. Therefore, the media output port includes an elongate sealing closure which is movable in the transverse direction and presses elastically against the bearing surface by a sealing feed guide. The printing medium is capable of being outputted between the bearing surface and the sealing closure in an output direction.

Abstract: The invention relates to a splashproof operating device (1), especially of a tachograph. A faulty seal often results in the entire apparatus breaking down because the fault remains undiscovered. The aim of the invention is to create an operating device (1) that ensures good functional safety and seals well towards the surroundings with the adjacent components. Said aim is achieved by an operating device in which contact areas (17) are elastically braced against each other. A decisive advantage of the inventive operating device consists of the fact that the abutting contact areas (17) of the operating element (9) are braced.

Abstract: According to the invention, several outward-projecting tongues are formed on the built-in housing part of a parallelepipedal built-in unit and a frame whose inner width is greater than the mounting dimension of the built-in housing, is configured on the front panel that is to be fixed on the built-in housing part.

Abstract: A printer with an elongated media output port is disclosed. The printer may be used for a digital tachograph of a motor vehicle. The printer includes at least one bearing surface which limits the media output in the transverse direction and along which the printing medium slides during output. The boundary conditions for the operation of a small-format printer in a digital tachograph of a motor vehicle makes it necessary that the media output port has to be sealed off against the ingress of harmful media. Therefore, the media output port includes an elongate sealing closure which is movable in the transverse direction and presses elastically against the bearing surface by a sealing feed guide. The printing medium is capable of being outputted between the bearing surface and the sealing closure in an output direction.