Damping hinge mechanism and folding type electronic device

The invention provides a damping hinge mechanism comprising a connecting shaft, a torsion spring and a housing; the position of the housing is fixed; the torsion spring is spiral and is accommodated in the housing; the connecting shaft is inserted into the housing and passes through the torsion spring; the connecting shaft is fixed at the first end of the torsion spring, and the housing is fixed at the second end of the torsion spring; damping grease is arranged in the internal space of the housing; the connecting shaft can rotate relative to the housing. The damping hinge mechanism can be guaranteed to be automatically bounced off, can be used for controlling the bouncing-off speed, and is relatively simple in structure and relatively small in floor space, so that equipment can be slowly effectively opened in case of limited space, and relatively good user experience is realized. The invention further provides a folding type electronic device adopting the damping hinge mechanism. 种阻尼铰链机构，包括连接轴、扭转弹簧和外壳，该外壳的位置