Height adjustment device and home appliance comprising same

A home appliance comprising:

• a main body;
• and
• a height adjustment device configured to adjust a height of the main body from a ground,
• wherein the height adjustment device comprises:
• a housing configured to be coupled to a lower portion of the main body;
• a leg passing through the housing and comprising a male thread portion on an outer circumferential surface thereof;
• a worm wheel inside the housing and comprising a female thread portion on an inner circumferential surface thereof, the female thread portion corresponding to the male thread portion of the leg such that the worm wheel is screw-coupled to the leg and is configured to ascend and descend;
• a worm engaged with the worm wheel and configured to rotate the worm wheel;
• and
• a worm shaft coupleable to and detachable from the worm and configured to rotate the worm in a state in which the worm shaft is coupled to the worm, and
• wherein the housing comprises a locking portion configured to prevent the worm shaft coupled to the worm from being separated from the housing.