Damping hinge device and support structure having the same

A damping hinge device, including:

• a first core shaft, one end section thereof being formed as a connection part, a damping contact part being formed on said first core shaft, a surface of said damping contact part being concavely formed with at least a groove and covered with a viscous damping layer;
• a first ring, sleeved on said first core shaft and positioned between said connection part and said damping contact part;
• a core shaft sleeve, one end section thereof being concavely formed with an accommodation slot for accommodating said damping contact part and said viscous damping layer of said first core shaft and said first ring;
• a second ring, sleeved on said first core shaft and combined at a slot opening of said core shaft sleeve, said second ring being served to cover said first ring for sealing said viscous damping layer thereby allowing said viscous damping layer to generate a viscous resistance to said damping contact part being in a rotating status, and
• a connection member formed with a first connection hole, said connection part of said first core shaft is mounted in said first connection hole, said connection member is formed as a tubular body in which an accommodation part is formed, said first connection hole is formed at one end of said tubular body and communicated with said accommodation part, the other end of said tubular body is formed with an opening communicated with said accommodation part, plural concave parts are annularly formed and arranged with intervals at the periphery of said opening.