Washing machine

A washing machine comprising:

• an integrated tub/drum configured to hold water, accommodate laundry, and rotate;
• a hollow rotary shaft coupled to and passing through pass through a surface of the integrated tub/drum;
• a water supply pipe and a water drain pipe in the integrated tub/drum and through a passage or opening in the hollow rotary shaft;
• a nozzle extending from an end of the water supply pipe in the integrated tub/drum;
• a water drain that extends from an end of the water drain pipe in the integrated tub/drum;
• a drive shaft coupled to an end surface of the integrated tub/drum other than the surface through which the hollow rotary shaft passes;
• and
• a drive motor configured to rotate the drive shaft,
• wherein the integrated tub/drum has a truncated conical shape, and the hollow rotary shaft is coupled to pass through an end surface of the integrated tub/drum having a relatively wide area,
• wherein the water drain extends downward from the water drain pipe, and is curved or bent towards a center of the integrated tub/drum,
• wherein the water drain has a length greater than a radius of an end of the integrated tub/drum having a relatively small area, and is spaced apart or separate from an inner circumferential surface of the integrated tub/drum;
• wherein the motor and the drive shaft are connected in series,
• wherein the nozzle extends upward from the water supply pipe, and is curved or bent towards a center of the integrated tub/drum, and
• wherein the nozzle includes a plurality of water supply holes in a side and/or surface of the nozzle facing toward the center of the integrated tub/drum.