Eyeglass hinge is a joint connecting the head of the pile and the foot of the mirror, which plays the role of opening and closing the mirror frame.
There are many kinds of hinges, common boring hinges, jointed hinges, and so on.In the process of metal frame production, jointed hinge is commonly used. Although the jointed hinge processing steps are a little more, but practical, good positioning effect.
-Jointed hinge