Patent ID: 8060985

Claim:
A hinge structure with changeable frictional faces, comprising: a spindle having a first end portion, a second end portion, and a stop portion located between the first end portion and the second end portion, the stop portion having a first stopping element and a second stopping element; a first enclosing part socketingly disposed onto the first end portion of the spindle and having an opening and a protrusion; and a second enclosing part socketingly disposed onto the second end portion of the spindle and having an opening and a protrusion, the openings of the first and second enclosing parts are oriented in a same direction; wherein, when the second enclosing part rotates from an initial position to a middle position abutting against the stop portion, the protrusion of the first enclosing part abuts against the first stopping element of the stop portion restricting the rotation of the spindle, and a low-torsion frictional face is formed by the rotation of the second enclosing part upon the second end; wherein, when the second enclosing part abutting against the stop portion rotates to an end position, the protrusion of the second enclosing part pushes the second stopping element of the stop portion and rotates the spindle with the second enclosing part, and a high-torsion frictional face is formed by the rotation of the first end portion of the spindle within the first enclosing part; wherein, when the second enclosing part rotates from the end position back to the middle position, the second enclosing part holds tightly the second end portion of the spindle and rotates the spindle with the second enclosing part, and a low-torsion frictional face is formed by the rotation of the first end portion of the spindle within the first enclosing part; wherein, when the second enclosing part rotates from the stop portion back to its initial position, the protrusion of the first enclosing part abuts against the first stopping element of the stop portion of the spindle restricting the rotation of the spindle, and a high-torsion frictional face is formed by the rotation of the second enclosing part upon the second end portion of the spindle.