Abstract: This application provides a foldable assembly and an electronic device. The foldable assembly includes a first main swing arm, a first torsion swing arm, a first shaft, and a damping assembly. The first main swing arm is provided with a first sliding groove. The first sliding groove includes a first acceleration segment and a first gentle speed segment connected to each other. An absolute value of a slope of the first acceleration segment is greater than an absolute value of a slope of the first gentle speed segment. The first torsion swing arm includes a first end and a second end. The first shaft passes through the first end and the first sliding groove, and connects the first torsion swing arm and the first main swing arm. The damping assembly is rotatably connected to the second end.

Abstract: A support apparatus and a foldable electronic device are provided. The support apparatus includes a hinge assembly, a first housing, a second housing, and a first flexible sealing member. The hinge assembly includes a rotating shaft mechanism and a shaft cover, where the rotating shaft mechanism is fastened to the shaft cover. The first housing and the second housing are respectively located on two opposite sides of the hinge assembly, the first housing and the second housing are configured to rotate relative to the shaft cover through the rotating shaft mechanism, the first housing, the second housing, and the rotating shaft mechanism each have a support surface for supporting a foldable screen, and a first movement gap is present between the first housing and an outer surface of the shaft cover. The first flexible sealing member fits into and seals the first movement gap.

Abstract: Disclosed is a mangling device for fibers, fiber webs or analogues, which comprises two rollers and two conveying mechanisms. At least one of the two rollers is a driving roller. The conveying mechanism comprises at least one driving roller, a plurality of carrier rollers and guiding belts installed on the driving roller and the carrier rollers in a tensioning manner. A space which is used for the fibers, the fiber webs or the analogues to pass is arranged between the two guiding belts, and the portions of the two guiding belts forming the passing space of the fibers, the fiber webs or the analogues are parallel to each other. The two rollers are respectively installed in positions corresponding to the passing space of the two guiding belts.