Patent ID: 7841051
Filing Date: 2010-11-30
Classification: B60N,E05D,E05Y,Y10T

Abstract:
1. A dual swing hinge structure comprising: two base frames arranged opposite to each other, said base frames each comprising a mounting portion, a receiving groove extending in a direction perpendicular to said mounting portion, two flanges disposed at two opposite sides of said receiving groove, and a pivot hole respectively cut through each of said flanges; a first bracket, said first bracket comprising two coupling arms respectively inserted into the receiving grooves of said base frames, at least one mounting plate, and two connection arms respectively connecting the coupling arms and the at least one mounting plate of said first bracket; a second bracket, said second bracket comprising two coupling arms respectively inserted into the receiving grooves of said base frames, at least one mounting plate spaced from the at least one mounting plate of said first bracket at a distance, and two connection arms respectively connecting the coupling arms and at least one mounting plate of said second bracket; two pivot pins respectively fastened in the pivot holes of said base frames and the coupling arms of said first bracket and said second bracket to pivotally secure said first bracket and said second bracket to said base frames; two first retaining members respectively affixed to the coupling arms of said first bracket at one side opposite to said second bracket and respectively coupled to said pivot pins for imparting a first torque force to said pivot pins when said first bracket is turned relative to said base frames; and two second retaining members respectively affixed to the coupling arms of said second bracket at one side opposite to said first bracket and respectively coupled to said pivot pins for imparting a second torque force to said pivot pins when said second bracket is turned relative to said base frames; two friction rings respectively mounted on said pivot pins, each friction ring is located between the coupling arms of said first bracket and the coupling arms of said second bracket; wherein the first torque force applied by said first retaining members to said pivot pins is greater than the second torque force applied by said second retaining members to said pivot pin; wherein, when said second bracket is biased relative to said base frames, said second bracket pivots relative to said base frames and said first bracket is held in position by said first retaining members and said pivot pins; and wherein, when said first bracket is biased relative to said base frames, said first bracket pivots and said second bracket pivots with said first bracket relative to said base frames; wherein said base frames each comprise a back stop wall and a bottom stop wall respectively disposed at back and bottom sides of the respective receiving grooves for stopping against the coupling arms of said first bracket and said second bracket to limit the turning angle of said first bracket and said second bracket relative to said base frames.