Abstract: A loose-leaf binder is disclosed, such as a loose-leaf photo album or a loose-leaf file binder, on which is disposed a plurality of hinge members having a pillar at one end and an axially concave knuckle at the other end. A longitudinal slit is formed on the outer wall of the concave knuckle and an extension bore is formed axially in the concave knuckle so that a pillar may be snapped into the concave knuckle via the longitudinal slit and the free end of the pillar can be inserted into the extension bore so as to increase the radial engaging force between the hinge members.

Abstract: This invention discloses a loose-leaf binder such as a loose-leaf photo album or a loose-leaf file binder, which is disposed a plurality of hinge members having a pillar at one end and an axially concave knuckle at the other end. A slit is formed on the outer wall of the concave knuckle so that a pillar may be inserted into the concave knuckle therefrom. When the assembly is completed, a single page of the photo album or file is created. With the addition of many single pages, a complete photo album or file is formed. The hinge members of the pages of this loose-leaf binder may be easily attached and detached so as to increase or decrease the number of pages of the binder as desired.