Hinge mechanism and electronic device

An electronic device, comprising:

• a hinge mechanism with a first side and a second side opposite from the first side of the hinge mechanism, the hinge mechanism comprising:
• a base with a first side and a second side opposite from the first side of the base;
• a first rotation assembly disposed on the first side of the base and comprised of a first swing arm, the first swing arm rotatably connected to the base;
• a second rotation assembly disposed on the second side of the base and comprised of a second swing arm, the second swing arm rotatably connected to the base;
• and
• a damping assembly, comprising:
• an elastic module;
• and
• an even number of friction assemblies, each friction assembly comprising:
• a gear member comprising an insertion part with a tapered face, and
• an intermediate shaft comprising a shaft body and a mounting part defining a tapered groove,
• wherein the shaft body is connected to the base, the mounting part is disposed on the shaft body, and an opening of the tapered groove is provided facing the gear member;
• and
• wherein the gear member is rotatably connected to the intermediate shaft, the insertion part is inserted into the tapered groove, and the tapered face abuts against a groove face of the tapered groove under an action of elastic force of the elastic module in an extension direction of an axis of the intermediate shaft;
• and
• wherein gear members of the even number of friction assemblies are located between the first rotation assembly and the second rotation assembly, and gear faces of two adjacent gear members are engaged with each other;
• and
• wherein a first gear face is disposed at an end that is of the first swing arm and that faces the gear members of the even number of friction assemblies, a second gear face is disposed at an end that is of the second swing arm and that faces the gear members of the even number of friction assemblies, the first gear face is engaged with a gear face of an adjacent gear member, and the second gear face is engaged with a gear face of an adjacent gear member;
• a first housing disposed on the first side of the hinge mechanism;
• and
• a second housing disposed on the second side of the hinge mechanism;
• wherein the first swing arm is slidably connected to the first housing;
• and the second swing arm is slidably connected to the second housing.