Hinge mechanism and electronic device

An electronic device, comprising a first housing, a second housing, a flexible display, and a hinge mechanism, wherein

• the first housing and the second housing are respectively disposed on two opposite sides of the hinge mechanism, a first housing mounting bracket is fastened to the first housing, and a second housing mounting bracket is fastened to the second housing;
• the flexible display continuously covers the first housing, the second housing, and the hinge mechanism, and the flexible display is fastened to the first housing and the second housing;
• and
• wherein the hinge mechanism is disposed opposite to a foldable part of the flexible display, and the electronic device is unfolded or folded via the hinge mechanism;
• and the hinge mechanism comprises a main shaft, a synchronization assembly, a first housing mounting bracket, and a second housing mounting bracket, the first housing mounting bracket and the second housing mounting bracket are respectively disposed on two opposite sides of the main shaft, and the synchronization assembly is located between the first housing mounting bracket and the second housing mounting bracket, wherein
• the synchronization assembly comprises a first connecting rod, a second connecting rod, and a third connecting rod, the second connecting rod is located between the first connecting rod and the third connecting rod, the second connecting rod is rotatably connected to the first connecting rod, the second connecting rod is rotatably connected to the third connecting rod, and an axis along which the second connecting rod is rotatably connected to the first connecting rod is parallel to and does not coincide with an axis along which the second connecting rod is rotatably connected to the third connecting rod;
• the first connecting rod is rotatably connected to the main shaft, and an axis along which the first connecting rod rotates around the main shaft is parallel to and does not coincide with the axis along which the second connecting rod is rotatably connected to the first connecting rod;
• and the third connecting rod is rotatably connected to the main shaft, and the third connecting rod is slidably connected to the second housing mounting bracket;
• and
• the first housing mounting bracket is provided with a first track slot, and the first connecting rod is capable of sliding along the first track slot, so that the first housing mounting bracket and the second housing mounting bracket synchronously rotate toward each other or away from each other relative to the main shaft.