Washing machine

摘要

A washing machine includes a washing drum (30) to allow enhancement in washing efficiency. Since a washing drum (30) of the washing machine includes a pattern having a protrusion portion (41), it may be possible to generate friction force between laundry and the washing drum (30) and to thereby increase washing efficiency. Since the pattern (40) has a concave-convex structure and performs action similar to a lifter, washing efficiency may be enhanced using tumbling generated by the pattern. Since a plurality of drain holes (43) are arranged in a certain pattern in the washing drum (30), it may be possible to prevent a dehydration bottleneck phenomenon in which dehydration is concentrated at a particular drain hole and to increase a dehydration rate. Since the pattern (40) is provided such that protrusion portions (41) and recessed portions (42) continue on the surface of the washing tub, it may be possible to enhance stiffness of the washing tub.