The damping shaft is a device that enables two parts to rotate relative to each other and to be positioned at any angle through friction. For two parts that have a rotational movement relationship, when one of the rotating parts is suspended at any angle, manually pushing the rotating part has a damping feel. Damped shafts are common in daily applications.

At present, common damping shafts require large installation space, high degree of customization requirements, and complex assembly of components, which restricts the application and promotion of damping shafts. Some studies have improved the common damping shaft, but the improved damping shaft is only suitable for scenarios where the end surface area of the rotating body perpendicular to the rotation axis direction is sufficient and it is convenient to install the compression screw on this end surface. When the size of the end face of the rotating body in the direction perpendicular to the rotation axis is limited, the screw cannot be installed on this end face, which results in the restriction of the application of the damping shaft.