Abstract: A rotating shaft mechanism is provided. The mechanism includes a main shaft assembly and a damper assembly, and the damper assembly is rotatably connected to the main shaft assembly; the damper assembly may include a cam member and a rotating assembly, the cam member is fastened on the main shaft assembly, the cam member has a cam surface, the rotating assembly includes a rotating member and a sliding member, the rotating member is rotatably connected to the main shaft assembly, and the sliding member may slide in a direction toward or away from the main shaft assembly relative to the rotating member; and the sliding member elastically abuts against the cam surface. An abutting force formed through elastic abutting may be transformed into resistance of relative rotation of the cam member and the rotating assembly, to generate a damping force between the main shaft assembly and the damper assembly.

Abstract: A rotating mechanism includes: a rotating shaft; a first mechanical part, where the first mechanical part is provided with a first slide groove; a second mechanical part, where the second mechanical part is provided with a second slide groove; a third mechanical part, where the third mechanical part is disposed in the first slide groove, and one end of the third mechanical part is rotatably connected to the rotating shaft; and a fourth mechanical part, where the fourth mechanical part is disposed in the second slide groove, and one end of the fourth mechanical part is rotatably connected to the rotating shaft. When the first mechanical part and the second mechanical part rotate around the rotating shaft, the third mechanical part slides with respect to the first slide groove.

Abstract: A foldable assembly which is configured to bear a flexible display. The foldable assembly includes a rotating shaft; a first mechanical part and a second mechanical part, where the first mechanical part and the second mechanical part are rotatably connected by using the rotating shaft; and a first protective structure, where the first protective structure is connected to an end face that is of the rotating shaft and that extends out of a periphery of the flexible display. A first surface of the flexible display is away from the rotating shaft, and the first protective structure is higher than or flush with the first surface of the flexible display, so that when the foldable display terminal falls, the first protective structure is in contact with a point of collision earlier than the flexible display.

Abstract: The present invention discloses a rotating mechanism and a foldable terminal. The rotating mechanism includes a guide shaft, at least two rotating parts, and at least two constant-length units. The rotating parts are disposed on two sides of the guide shaft. An arc-shaped slot is disposed on the guide shaft. An arc-shaped part is disposed on the rotating part, and the arc-shaped part is disposed in the arc-shaped slot in a sliding manner. The constant-length unit is a long strip that has a fixed length and can be bent. A positioning end of the constant-length unit is fixedly connected to or rotationally connected to a rotating part on one side of the guide shaft, and a sliding end is connected to a rotating part on the other side of the guide shaft in a sliding manner. The foldable terminal has the foregoing rotating mechanism.

Abstract: The present invention discloses a rotating mechanism and a foldable terminal. The rotating mechanism includes a guide shaft, at least two rotating parts, and at least two constant-length units. The rotating parts are disposed on two sides of the guide shaft. An arc-shaped slot is disposed on the guide shaft. An arc-shaped part is disposed on the rotating part, and the arc-shaped part is disposed in the arc-shaped slot in a sliding manner. The constant-length unit is a long strip that has a fixed length and can be bent. A positioning end of the constant-length unit is fixedly connected to or rotationally connected to a rotating part on one side of the guide shaft, and a sliding end is connected to a rotating part on the other side of the guide shaft in a sliding manner. The foldable terminal has the foregoing rotating mechanism.

Abstract: A fan, including a volute, a motor, and multiple fan blades that are assembled on a rotor of the motor, where the volute includes a side wall that is disposed around circumference of the multiple fan blades, and a support frame that is connected to an end of the side wall and located on an inner side of the side wall; and the rotor of the motor drives the multiple fan blades to rotate, where multiple through-holes are disposed on the side wall of the volute, and at least more than one of the multiple through-holes is a slant through-hole.

Abstract: A fan, including a volute, a motor, and multiple fan blades that are assembled on a rotor of the motor, where the volute includes a side wall that is disposed around circumference of the multiple fan blades, and a support frame that is connected to an end of the side wall and located on an inner side of the side wall; and the rotor of the motor drives the multiple fan blades to rotate, where multiple through-holes are disposed on the side wall of the volute, and at least more than one of the multiple through-holes is a slant through-hole.

Abstract: The present invention discloses a circuit board interconnection architecture, which includes at least one first plugboard and at least two second plugboards substantially perpendicular to the first plugboard, where at least one of the first plugboard and the second plugboards is provided with several slots; the first plugboard and the second plugboards are mated and electrically connected by using signal connectors on both sides of the slots. The circuit board interconnection architecture solves a fitting precision problem of the first plugboard and the second plugboards in orthogonal directions. Even though there is an assembly tolerance between the first plugboard and the second plugboards, the connectors still satisfy assembly precision requirements, which can also avoid overall deformation of a first circuit board and a second circuit board after the first plugboard and the second plugboards are interconnected and mated orthogonally.

Abstract: The present invention discloses a circuit board interconnection architecture, which includes at least one first plugboard and at least two second plugboards substantially perpendicular to the first plugboard, where at least one of the first plugboard and the second plugboards is provided with several slots; the first plugboard and the second plugboards are mated and electrically connected by using signal connectors on both sides of the slots. The circuit board interconnection architecture solves a fitting precision problem of the first plugboard and the second plugboards in orthogonal directions. Even though there is an assembly tolerance between the first plugboard and the second plugboards, the connectors still satisfy assembly precision requirements, which can also avoid overall deformation of a first circuit board and a second circuit board after the first plugboard and the second plugboards are interconnected and mated orthogonally.