Abstract: Disclosed is a damper hinge for smoothly opening a cover from a main body in a small-sized portable article, thereby preventing a breakdown and damage of its hinge portion and assuring simplicity in its use.

Abstract: Disclosed is a damper hinge for smoothly opening a cover from a main body in a small-sized portable article, thereby preventing a breakdown and damage of its hinge portion and assuring simplicity in its use.

Abstract: A door hinge unit for smoothly opening and closing a door using the fluid resistance force of a fluid comprises: a cylindrical oil container containing a viscous fluid therein and having a fluid transfer groove formed along a circumferential direction at an inner wall of the container; a hinge shaft rotatably supported within the oil container with the same core axis as the oil container and whose at least one end is protruded along an axial direction of the oil container, the hinge shaft having a blade formed at an outer circumferential surface thereof and which is slidingly in contact with the inner wall of the oil container; a barrier formed crossing the inner wall of the oil container and an outer circumference of the hinge shaft and having a penetration fluid passage formed along the circumferential direction; and a restoring spring whose one end is coupled to the oil container and the other end is coupled to the hinge shaft.