Patent ID: 6618902
Filing Date: 2003-09-16
Classification: E05D,E05F,E05Y,Y10T

Abstract:
A tubular spring hinge assembly, comprising a first outer tube, a second outer tube, a central shaft, a torsion spring, and two regulators, wherein:the first outer tube has a side provided with a leaf, the second outer tube has a side provided with a leaf, the first outer tube is pivotally mounted on the second outer tube, the torsion spring is mounted in the first outer tube and the second outer tube, each of the two regulators is mounted on an outer end of the first outer tube and the second outer tube respectively, the central shaft is mounted in the torsion spring, and has two ends each extended through each of the two regulators, the torsion spring has two ends each inserted into each of the two regulators, each of the two regulators has a periphery provided with a pin member which is rested on the leaf of each of the first outer tube and the second outer tube; and wherein: a first separation tube is mounted in a first end of the first outer tube, a second separation tube is mounted in a first end of the second outer tube, the first separation tube has a first end having an outer wall formed with an annular separation flange rested on an end face of the first end of the first outer tube, the second separation tube has a first end having an outer wall formed with an annular separation flange rested on an end face of the first end of the second outer tube, so as to separate the first outer tube from the second outer tube, thereby preventing the first outer tube and the second outer tube from rubbing and producing noise, the first separation tube has a second end having an inner wall formed with an annular retaining portion, the second separation tube has a second end having an inner wall formed with an annular retaining portion, a connecting tube is mounted between the first outer tube and the second outer tube, and is mounted in the first separation tube and the second separation tube, the connecting tube has two ends each retained by the annular retaining portion of the first separation tube and the annular retaining portion of the second separation tube.