Abstract: This application provides a hinge mechanism and an electronic device. One example hinge mechanism includes a base, and a first rotating assembly and a second rotating assembly that are respectively disposed on two sides of the base. When the first rotating assembly and the second rotating assembly rotate toward each other, a length of the hinge mechanism may be increased; or when the first rotating assembly and the second rotating assembly rotate opposite to each other, a length of the hinge mechanism may be shortened, and a support surface for supporting a flexible display can be formed.

Abstract: The hinge mechanism includes 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 located 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. The synchronization assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod and the third connecting rod are rotatably connected via the second connecting rod, the first connecting rod is rotatably connected to the main shaft. The third connecting rod is slidably connected to the second housing mounting bracket. The first housing mounting bracket is provided with a first track slot, and the first connecting rod slides along the first track slot.

Abstract: A hinge mechanism includes a main shaft, a synchronization assembly, and two swing arms, where the two swing arms are respectively disposed on two opposite sides of the main shaft, and the two swing arms are rotatably connected to the main shaft. In addition, along an axial direction of the hinge mechanism, the synchronization assembly is located between the two swing arms. The synchronization assembly includes two gear assemblies. Each gear assembly includes a gear member and a connecting rod. The gear member includes a gear and a connection part. Gear surfaces of the gears of the two gear assemblies are engaged with each other, and the two gears are located between two connection parts. Each connecting rod is located between one connection part and one swing arm, and each connecting rod is slidably connected to the connection part and is rotatably connected to the swing arm.

Abstract: The hinge mechanism includes a base, a first rotation assembly, a second rotation assembly, and a damping assembly. The damping assembly includes an elastic module and an even number of friction assemblies. Each friction assembly includes an intermediate shaft and a gear member. The intermediate shaft includes a shaft body and a mounting part. The shaft body is connected to the base. The mounting part is disposed on the shaft body. The mounting part has a tapered groove. The gear member includes an insertion part. The insertion part has a tapered face, and the insertion part is inserted into the tapered groove. The tapered face abuts against a groove face of the tapered groove under an action of elastic force of the elastic module. A first swing arm of the first rotation assembly and a second swing arm of the second rotation group rotate around the base.

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.