Abstract: A sliding hinge is mounted between a cover and a base of an electronic device and has a stationary leaf, a moving leaf, a resilient device, a main linkage and a secondary linkage. The stationary leaf is connected to the base. The moving leaf is connected to the cover and is mounted slidably on the stationary leaf. The resilient device is mounted pivotally on the stationary leaf. The main linkage is mounted pivotally on the stationary leaf and is connected pivotally to the moving leaf and the resilient device. The secondary linkage is mounted pivotally on the stationary leaf and is connected pivotally to the moving leaf. The cover is moved to slide relative to the base by the moving leaf and the main and secondary linkages. Furthermore, the resilient device keeps the cover closed or fully opened without external forces.

Abstract: A sliding hinge is mounted between a cover and a base of an electronic device and has a stationary leaf, a moving leaf, a resilient device, a main linkage and a secondary linkage. The stationary leaf is connected to the base. The moving leaf is connected to the cover and is mounted slidably on the stationary leaf. The resilient device is mounted pivotally on the stationary leaf. The main linkage is mounted pivotally on the stationary leaf and is connected pivotally to the moving leaf and the resilient device. The secondary linkage is mounted pivotally on the stationary leaf and is connected pivotally to the moving leaf. The cover is moved to slide relative to the base by the moving leaf and the main and secondary linkages. Furthermore, the resilient device keeps the cover closed or fully opened without external forces.

Abstract: A hinge has a barrel, a resilient positioning sleeve, a combination leaf-pivot pin and a fastener. The positioning sleeve is mounted rotatably in the barrel and has an inner surface, a stepped expansion slot and at least one flat surface. The expansion slot is formed longitudinally through the positioning sleeve. The flat surface is formed opposite to the expansion slot on the inner surface. The combination leaf-pivot pin has a distal end, a proximal end, a leaf and a pivot pin. The pivot pin protrudes longitudinally from the leaf and has a positioning ring and a connecting shaft. The positioning ring is mounted in the positioning sleeve and has an outer surface and two flat surfaces formed opposite to each other on the outer surface and selectively corresponding to and seating in the flat surface in the positioning ring. The fastener connects to the connecting shaft.

Abstract: A triple positioning hinge that is compact and securely retains a monitor of a portable electronic device at three determined positions permanently. The triple positioning hinge has a body, a pivoting member, a first positioning element, a second positioning element and a resilient element. The first positioning element has multiple detents formed on a surface of the first positioning element. The second positioning element is pushed toward the first positioning element by the resilient element and has three positioning notches circularly formed in a surface at intervals and respectively correspond to and engage with the detents of the first positioning element to hold the monitor connected with the pivoting member at three determined positions.

Abstract: A triple positioning hinge that is compact and securely retains a monitor of a portable electronic device at three determined positions permanently. The triple positioning hinge has a body, a pivoting member, a first positioning element, a second positioning element and a resilient element. The first positioning element has multiple detents formed on a surface of the first positioning element. The second positioning element is pushed toward the first positioning element by the resilient element and has three positioning notches circularly formed in a surface at intervals and respectively correspond to and engage with the detents of the first positioning element to hold the monitor connected with the pivoting member at three determined positions.

Abstract: A rotatable hinge has a stationary bracket, a positioning washer, a biasing washer, a limit ring, a rotating bracket, a keyed washer and a keyed pivot rivet. The keyed pivot rivet has a distal end. The distal end of the keyed pivot rivet extends through the biasing washer, the positioning washer, the stationary bracket, the limit ring, the rotating bracket and the keyed washer and is expanded to hold the rotatable hinge together. The rotatable hinge has a simplified structure and is easy to manufacture.

Abstract: A hinge has a barrel, a resilient positioning sleeve, a combination leaf-pivot pin and a fastener. The positioning sleeve is mounted rotatably in the barrel and has an inner surface, a stepped expansion slot and at least one flat surface. The expansion slot is formed longitudinally through the positioning sleeve. The flat surface is formed opposite to the expansion slot on the inner surface. The combination leaf-pivot pin has a distal end, a proximal end, a leaf and a pivot pin. The pivot pin protrudes longitudinally from the leaf and has a positioning ring and a connecting shaft. The positioning ring is mounted in the positioning sleeve and has an outer surface and two flat surfaces formed opposite to each other on the outer surface and selectively corresponding to and seating in the flat surface in the positioning ring. The fastener connects to the connecting shaft.