US Patent 11142932 Dual-shaft hinge module and portable electronic device

A dual-shaft hinge module including a first shaft, a first driving gear disposed on the first shaft, a second shaft, a second driving gear disposed on the second shaft, a pair of driven gears coupled between the first driving gear and the second driving gear, and multiple links is provided. The links are respectively pivoted to any two engaged gears to keep a center distance of the engaged gears fixed. A relative distance of the first shaft and the second shaft is changed along with different engagement positions of the driven gears relative to the first driving gear and the second driving gear. A portable electronic device is also provided.