Household appliance including a wall which has an integrated raised coupling element for coupling to a backing part mounted thereon, and method for mounting the coupling element on the wall

A household appliance comprising:

• walls delimiting a receiving space suitable for receiving food, said walls having an outer side facing away from said receiving space;
• a backing plate having a coupling element constructed as a receptacle, said backing plate being metal;
• a counter-coupling element disposed on said outer side of one of said walls, said counter-coupling element being constructed as a raised cup without holes, said raised cup being produced by a drawing of said at least one of said walls with said cup standing out from said outer side;
• said receptacle being a hole, said hole being funnel-shaped with a funnel base having a cutout for passing said cup through said hole, an edge of a boundary limiting said cutout being spaced apart from said outer side in a direction in which said cup extends, a wall thickness of said backing plate, in wall regions delimiting said hole, being substantially equal over an entire depth of said funnel-shaped hole;
• said raised cup being extended through and coupled to said receptacle upon mounting said backing plate on said outer side of said one wall in a mounted state with said backing plate bearing flat against said outer side.