Patent ID: 7444716

Claim:
A duel-axle hinge comprising: two adjusting assemblies connected to each other, and each adjusting assembly comprising an adjusting shaft, wherein the two adjusting shafts of the two adjusting assemblies are connected to each other; a connecting sheet mounted securely on the adjusting shaft; a rotating bracket mounted around the adjusting shaft; a torsion spring mounted around the adjusting shaft and respectively attached to the rotating bracket and the adjusting shaft; and a fastener mounted securely on the adjusting shaft; a connecting assembly connected to the adjusting assemblies and comprising a cover having two sides; and two attaching leaves formed respectively on the two sides of the cover, and each attaching leaf having a first end and a second end; and a shell having two sides; and two attaching leaves formed respectively on the two sides of the shell, and each attaching leaf having a first end and a second end; two lifting assemblies connecting to the connecting assembly, and each lifting assembly comprising a bracket having an inner side and an outer side; a side shaft mounted rotatably in the bracket and connecting to the cover of the connecting assembly; a central shaft mounted rotatably in the bracket and connecting to the shell of the connecting assembly; and a torsion spring mounted around the central shaft and attached respectively to the central shaft and the bracket; and a positioning gear assembly mounted in the connecting assembly and comprising an actuating gear assembly having a transmission rod mounted securely on the shell of the connecting assembly; a main gear mounted rotatably around the transmission rod; a secondary gear mounted rotatably around the transmission rod and mounted rotatably on the main gear; and a nut fastened on the transmission rod to hold the main and secondary gears; an inactive gear assembly having an axle mounted securely on the shell of the connecting assembly; a positioning gear mounted rotatably around the axle; an additional gear formed on the positioning gear and engaging the main gear of the actuating gear assembly; and a sleeve mounted rotatably around the axle; a belt mounted around the secondary gear of the actuating gear assembly and the sleeve of the positioning gear assembly and having two ends fastened on the cover of the connecting assembly; and a solenoid mounted on the shell and having an extension rod with a teeth end selectively engaging the positioning gear of the positioning gear assembly.