Abstract: A self-closing hinge has a housing shaft section with a bore extending therethrough in a direction substantially parallel to a longitudinal axis is attachable to a first rotatable member. A bore extends through the housing shaft section. The cross-sectional profile of the bore in a plane orthogonal to the longitudinal axis has at least one arcuate portion and at least one non-arcuate portion. A roll pin rotatably disposed in the bore has substantially the same cross-sectional profile as the bore. A pair of shaft members, each having a shaft-member body attachable to a second rotatable member, has a pin inserted in an interference fit in the opposed ends of the roll-pin bore. The pins have a cross-sectional profile corresponding to the roll-pin cross-sectional profile.

Abstract: A self-closing hinge has a housing shaft section with a bore extending therethrough in a direction substantially parallel to a longitudinal axis is attachable to a first rotatable member. A bore extends through the housing shaft section. The cross-sectional profile of the bore in a plane orthogonal to the longitudinal axis has at least one arcuate portion and at least one non-arcuate portion. A roll pin rotatably disposed in the bore has substantially the same cross-sectional profile as the bore. A pair of shaft members, each having a shaft-member body attachable to a second rotatable member, has a pin inserted in an interference fit in the opposed ends of the roll-pin bore. The pins have a cross-sectional profile corresponding to the roll-pin cross-sectional profile.

Abstract: A hinge torque fixing structure, comprising a hinge, a fulcrum and a torque shrapnel, wherein one end of the hinge is used for connecting a main body of electronic products, and the opposite end is provided with a circular hinge hole; one end of the fulcrum is used for connecting a lid of the main body, which is characterized in: the torque shrapnel is a ring-shaped polygonal shrapnel, wherein one end of the torque shrapnel is provided with an opening, each of two ends of the opening forming an outwardly protruding flange; when the torque shrapnel is disposed between the hinge and the hinge hole, the torque by rotating the hinge relative to the hinge hole is enhanced to keep the hinge closely rotated relative to the hinge hole without loose when there is an angle therebetween during positioning.

Abstract: A hinge torque fixing structure, comprising a hinge, a fulcrum and a torque shrapnel, wherein one end of the hinge is used for connecting a main body of electronic products, and the opposite end is provided with a circular hinge hole; one end of the fulcrum is used for connecting a lid of the main body, which is characterized in: the torque shrapnel is a ring-shaped polygonal shrapnel, wherein one end of the torque shrapnel is provided with an opening, each of two ends of the opening forming an outwardly protruding flange; when the torque shrapnel is disposed between the hinge and the hinge hole, the torque by rotating the hinge relative to the hinge hole is enhanced to keep the hinge closely rotated relative to the hinge hole without loose when there is an angle therebetween during positioning.

Abstract: A hinge torque fixing structure, comprising a hinge, a fulcrum and a torque shrapnel, wherein one end of the hinge is used for connecting a main body of electronic products, and the opposite end is provided with a circular hinge hole; one end of the fulcrum is used for connecting a lid of the main body, which is characterized in: the torque shrapnel is a ring-shaped polygonal shrapnel, wherein one end of the torque shrapnel is provided with an opening, each of two ends of the opening forming an outwardly protruding flange; when the torque shrapnel is disposed between the hinge and the hinge hole, the torque by rotating the hinge relative to the hinge hole is enhanced to keep the hinge closely rotated relative to the hinge hole without loose when there is an angle therebetween during positioning.

Abstract: An improved hinge structure, comprising: a fixed base, a hinge and at least a set of positioning torque shrapnel; wherein the internal of the fixed base is provided with an irregular-shaped axle hole; one end of the hinge is an insert ends whose outer surface is provided with a protruding sector portion and a recessed planar portion; the positioning torque shrapnel is provided with a through hole for the insert end of the hinge to pass through. The internal wall of through hole is provided with a passive protruding portion and a passive plan portion that can be respectively engaged with the protruding sector portion and the plan portion on the insert end of the hinge; accordingly, when rotating the hinge, the effect of positioning and generating a torque can be achieved.