Patent ID: 11193231

Abstract:
A washing machine includes a cabinet, a tub disposed inside the cabinet to form a washing space in which washing water is filled, and a drum rotatably supported in the washing space for receiving laundry. The tub includes a first case coupled to a second case to form the washing space. A first coupling surface is formed along a periphery of an opened end portion of the first case and a second coupling surface is formed along a periphery of an opened end portion of the second case facing the first case. The second coupling surface is welded to the first coupling surface. A coupling protrusion protrudes along the first coupling surface and includes a protruding end portion welded to the second coupling surface. The coupling protrusion includes a main-coupling protrusion protruding along the first coupling surface and a sub-coupling protrusion parallel to and spaced apart from the main-coupling protrusion.