Furniture caster has housing in interior accommodation, in which portion of main sphere area is provided for running with tub area, and is located for support, and another portion of sphere is also provided by outside casing

摘要

The caster has the housing in an interior accommodation, in which a portion of a main sphere area is provided for running with tub area, and is located for a support. Another portion of the sphere is also provided by an outside casing, which has ball transfer unit, and is in contact with the main sphere.