Abstract: The hinge mechanism includes a main shaft and a synchronization assembly, the synchronization assembly includes a first gear assembly and a second gear assembly, the first gear assembly includes a first gear connecting rod and a third gear connecting rod that are rotatably coupled, and the second gear assembly includes a second gear connecting rod and a fourth gear connecting rod that are rotatably coupled. The main shaft includes a rotating support member. The first gear connecting rod and the rotating support member are rotatably coupled via gear surfaces that are engaged with each other, the second gear connecting rod and the rotating support member are rotatably coupled via gear surfaces that are engaged with each other, and the third gear connecting rod and the fourth gear connecting rod are rotatably coupled via gear surfaces that are engaged with each other.

Abstract: A hinge mechanism includes a main shaft and a rotating module. The rotating module includes a first rotating assembly, a second rotating assembly, a first housing mounting bracket, and a second housing mounting bracket. The first rotating assembly includes a first swing arm, a first support arm, and a first connector. The first connector is separately rotatably connected to the first swing arm and the first support plate, and the first connector is capable of moving along a first track slot of the main shaft, for limitation on a movement track of the first connector. The second rotating assembly includes a second swing arm, a second support arm, and a second connector. The second connector is separately rotatably connected to the second swing arm and the second support arm, and the second connector is capable of moving along a second track slot of the main shaft.

Abstract: A folding apparatus includes a principal axis, a first bracket and a second bracket that are located on two sides of a principal axis along a width direction. A first connecting rod and a second connecting rod are located on two sides of the principal axis along the width direction, and a first swing arm and a second swing arm are located on two sides of the principal axis along the width direction. A first support plate and a second support plate are located on two sides of the principal axis along the width direction. When the first bracket and the second bracket rotate to be positioned face-to-face, and a length of accommodating space of the folding apparatus that accommodates a folded part of a flexible display can be extended.

Abstract: A substrate is provided. The substrate includes a bottom plate and at least one bonding portion disposed on the bottom plate, where each bonding portion takes a shape that is a part of an Archimedean spiral. An electronic device, a bonding structure, and a bonding method for the bonding structure are further provided.

Abstract: A foldable display device and a foldable terminal are provided. The foldable display device comprises a flexible screen, a folding mechanism, a bendable flattening sheet, and two sets of sliding mechanisms. The folding mechanism, the flattening sheet and the flexible screen are laminated in sequence, and are fixedly connected to each other at a middle folding position, so as to avoid arching of the flexible screen. The two sets of sliding mechanisms each include a first spring, a first sliding member, a second spring, and a second sliding member connected in sequence; two ends of the flattening sheet are fixed to the first sliding members of the two sets of sliding mechanisms respectively, and two ends of the flexible screen are fixed to the second sliding members of the two sets of sliding mechanisms respectively.

Abstract: A substrate is provided. The substrate includes a bottom plate and at least one bonding portion disposed on the bottom plate, where each bonding portion takes a shape that is a part of an Archimedean spiral. An electronic device, a bonding structure, and a bonding method for the bonding structure are further provided.