Eyeglass has lenses that are prevented to move away from each other by positioning strap ends at specific portion of frame, so that brackets are partially folded back into storage position to allow disengagement of rib and groove

摘要

The eyeglass (10) has a frame that is set with removable brackets (16) mounted at rib (44) for releasable attachment to a hinge element (28) of frame. An attachment unit is provided with rib which is coupled together with an outer periphery groove (40) of hinge element. The brackets are opened in use position, when rib and groove are inserted into one another. The lenses are prevented to move away from each other by positioning strap ends at a specific portion (24) of frame, so that brackets are partially folded back into storage position to allow disengagement of rib and groove.