Patent attributes
The eyeglass structure mainly contains a frame and a viewing lens. At each interface between a front opening and the two temple members of the frame, a positioning slot with a protruding block therewithin is provided. On the other hand, two positioning pieces, each with a notch, are extended from the two ends of the viewing lens. To install the viewing lens, the positioning pieces are threaded into the positioning slots and the protruding blocks are embedded into the notches to secure the viewing lens. To detach the viewing lens, the positioning pieces are pulled to break out the locking of the protruding blocks and pushed to escape the confinement of positioning slots. The installation and detachment are therefore could be easily and conveniently conducted.
