Patent ID: 7987557

Claim:
An enclosed hinge device with a readily center-aligned mechanism, comprising: an enclosing part having an enclosing end extending along a width of a end thereof and a fastening block spaced apart from the enclosing end and extending outwardly from an outer edge thereof; an arresting part having a pair of notch grooves and a pivot hole located on a first end thereof and a fastening notch groove located on a second end thereof opposite the first end, the arresting part is securingly fixed directly to the outer edge of the enclosing part, the pair of notch grooves are spaced apart from an outer periphery and the pivotal hole of the arresting part, the fastening block of the enclosing part is inserted into the fastening notch groove of the arresting part; a locking retainer having a pair of protruded blocks and a through hole, one of the pair of protruded blocks is inserted into and fastened with each of the pair of notch grooves; and a pivotal axle having a first axle segment pivotally inserted into the enclosing end, and a second axle segment pivotally inserted through the pivotal hole of the arresting part and inserted through the through hole of the locking retainer; wherein the end of the second axle segment is inserted, in the order of, a locking rotator, and elastic parts, and is then securingly retained with a nut with the locking rotator being rotatable with the second axle segment, wherein the pair of protruded blocks and the pair of notch grooves of the arresting part fixing and aligning the locking retainer relative to the arresting part and providing proper alignment and rotation of the pivotal axle; wherein the arresting part increasing a rigidity of the enclosing part and reducing a shaking of the pivotal axle.