Table lamp and rotary joint thereof

A table lamp comprising:

• a base body;
• a lighting member;
• and a frictional rotary joint configured for rotatably connecting the lighting member to the base body, the rotary joint comprising:
• a housing, connected to the base body and defining a cavity therein;
• and a rotary portion comprising an elastic rotator and a connecting bar with opposite ends respectively connected to the lighting member and an outer surface of the elastic rotator, the elastic rotator being rotatably retained within the cavity, wherein the elastic rotator defines a center hole and a slot extending parallel to the axis of the center hole which allows the elastic rotator to deform elastically, an outer diameter of the elastic rotator is greater than a diameter of the cavity;
• wherein the elastic rotator is compressed and inserted into the cavity, and the outer surface of the elastic rotator mates tightly with an inner surface of the cavity to create friction therebetween, and a hollow axle, wherein the outer diameter of the hollow axle is greater than the diameter of the center hole, and the hollow axle rebounds to apply a pushing force to an inner surface of the center hole after being compressed and inserted into the center hole of the rotator, thereby allowing the outer surface of the elastic rotator to mate more tightly with the inner surface of the cavity.