Abstract: A hinge is mounted between a cover and a body of an electronic device and has an eccentric sleeve and a resisting assembly abutting against each other. When the cover is pivoted, the eccentric sleeve is rotated as well. Because the eccentric sleeve has sectors with varied radiuses, the resisting assembly is compressed to conduct various resisting forces when the eccentric sleeve is rotated. When the cover is opened to a normal visual angle, the hinge provides a constant largest torque. Therefore, the cover is held at the normal visual angle even though the user hits the touch panel on the cover.

Abstract: A hinge is mounted between a cover and a body of an electronic device and has an eccentric sleeve and a resisting assembly abutting against each other. When the cover is pivoted, the eccentric sleeve is rotated as well. Because the eccentric sleeve has sectors with varied radius, the resisting assembly is compressed to conduct various resisting forces when the eccentric sleeve is rotated. When the cover is opened to normal visual angle, the hinge provides a constant largest torque. Therefore, the cover is held at the normal visual angle even though the user hits the touch panel on the cover.

Abstract: A portable electronic device has a cover, a base and a heat-dissipating hinge. The heat-dissipating hinge has a cam and a foot. The cam is attached to the cover. The foot abuts the cam and protrudes out of the base. When the cover is opened, the cam is rotated to push the foot protruding out of the base and standing on the table. Therefore the base is elevated to easily dissipate heat so heat dissipation efficiency of the portable electronic device is increased.