Abstract: The invention relates to a direct plug-in connector (1) for establishing an electric connection between a conductor (30) and a metallized through opening (40) of a printed circuit board (50). The direct plug-in connector (1) has a fastening element (4) and a contact (2) with at least one first contact arm (3a). The first contact arm (3a) is configured for the electric connection of the conductor (30) to the metallized through opening (40). The fastening element (4) can assume a fastening position and a release position, the fastening element (4) being configured to fasten the direct plug-in connector (1) to the metallized through opening (40) in the fastening position.

Abstract: The invention relates to a direct plug-in connector (1) for establishing an electric connection between a conductor (30) and a metallized through opening (40) of a printed circuit board (50). The direct plug-in connector (1) has a fastening element (4) and a contact (2) with at least one first contact arm (3a). The first contact arm (3a) is configured for the electric connection of the conductor (30) to the metallized through opening (40). The fastening element (4) can assume a fastening position and a release position, the fastening element (4) being configured to fasten the direct plug-in connector (1) to the metallized through opening (40) in the fastening position.

Abstract: A surface cleaning head for cleaning a surface is provided that includes a housing that has a cleaning chamber surrounded by a peripheral wall and open at the bottom, and in which a cleaning nozzle is mounted on a spray arm and is freely rotatable about a rotational axis, and a jet pump for suctioning off cleaning fluid applied to a surface, the jet pump having a pump inlet channel connected to a combining channel via a mixing chamber, and a motive nozzle upstream from the combining channel. To improve the surface cleaning head, the pump inlet channel is oriented radially with respect to the spray arm and connected to the peripheral wall of the cleaning chamber, the diameter of the combining channel is 14 to 18 mm, and the distance between the motive nozzle and the combining channel is at least 10 mm.

Abstract: A surface cleaning head for cleaning a surface is provided that includes a housing that has a cleaning chamber surrounded by a peripheral wall and open at the bottom, and in which a cleaning nozzle is mounted on a spray arm and is freely rotatable about a rotational axis, and a jet pump for suctioning off cleaning fluid applied to a surface, the jet pump having a pump inlet channel connected to a combining channel via a mixing chamber, and a motive nozzle upstream from the combining channel. To improve the surface cleaning head, the pump inlet channel is oriented radially with respect to the spray arm and connected to the peripheral wall of the cleaning chamber, the diameter of the combining channel is 14 to 18 mm, and the distance between the motive nozzle and the combining channel is at least 10 mm.

Abstract: The invention relates to a method for generating a cleaning agent foam, in which a chemical is admixed with a cleaning liquid by means of an injector (22) and in addition air is admixed by means of a foaming nozzle (34). To develop the method in such a manner that an effective cleaning agent foam can be generated with a reduced proportion of chemical, according to the invention it is proposed that the cleaning liquid/chemical mixture is fed to the foaming nozzle (34) under a pressure of at least 30 bar. There are also proposed an injector (22) and a foam generation system (10) for carrying out the method.