Washing tub for low frequency vibration type washing machine

摘要

A bulged washing tub for a low frequency vibration type washing machine is disclosed. The side wall of the washing tub is outwardly bulged so that this side wall meets with the bottom of the washing tub at an obtuse angle and smoothly guides the heart type or scroll type water current in the washing tub. A plurality of friction prominences of the horizontal stripe type are provided on the inner surface of the outward bulged side wall. The prominences give frictional force to clothes when the clothes are rubbed against them while coming up and going down along with the water current in the washing tub. The frictional force caused by the prominences causes a so-called washboard effect and makes the clothes cleaned as if they were manually washed using a washboard.