CUVE DE LAVAGE ET MACHINE À LAVER AYANT UNE TELLE CUVE DE LAVAGE

摘要

Provided is a tub (100) for a washing machine, wherein the tub has a washing space (103) defined therein and filled with washing water, wherein a drum (30) for receiving laundry therein is rotatably disposed in the washing space. The tub (100) includes: a first case (300) and a second case (400) welded to be coupled to each other to form the washing space and an outer appearance of the tub (100); a first coupling surface (310) formed along a circumference of the first case (300) facing the second case (400); a second coupling surface (410) formed along a circumference of the second case (400) facing the first case (300) and bonded to the first coupling surface (310); and a coupling protrusion (321, 322) protruding along the first coupling surface (310) to encircle the washing space (103), wherein a protruding end portion of the coupling protrusion (321, 322) is welded to the second coupling surface (410). The coupling protrusion includes: a main coupling protrusion (321) protruding along the first coupling surface (310); and an auxiliary coupling protrusion (322) protruding along the first coupling surface (310) and outwardly spaced apart from the main coupling protrusion (321). Further, an opening (322a) for discharging water leaked into a space between the auxiliary coupling protrusion (322) and the main coupling protrusion (321) to an outside of the tub (100) is defined in one side of the auxiliary coupling protrusion (322).