Damping hinge apparatus

A damping hinge apparatus comprising:

• a hinge adapted for producing and releasing an elastic force by rotating;
• and
• a damper arranged coaxially with the hinge, the damper having
• a damping shell having a cylinder-shaped shell body and a cover formed in the top of the shell body,
• a damping cover fixed in the shell body of the damping shell, the damping cover having a center hole which is coaxial with the shell body, an inner wall of the center hole defining a plurality of loop-shaped grooves coaxial with the center hole and parallel with each other,
• a damping body having a column portion received in the center hole, the column portion protruding radially and outward to form a plurality of rotating plates parallel with each other, the rotating plates engaging the corresponding loop-shaped grooves, a bottom of the column portion connecting a connecting portion located beneath the damping cover,
• an outer gasket disposed on the connecting portion and pressed against an inner side of the shell body, damping oil being filled between the outer gasket, the damping shell and the damping body, and
• a rotating body, one end of the rotating body engaging with the hinge for rotating together with the hinge, the other end of the rotating body selectively engaging with the damping body for pushing the damping body to rotate when the elastic force of the hinge being released.