| 摘要 |
PURPOSE:To reduce a temple joint structure to smaller size so that the slip characteristic thereof is not hindered by adopting powerful magnets as recovering force of a temple to the home position (normal opening degree). CONSTITUTION:One hinge piece 8 of a hinge 6 is fixed by brazing to a wrap-a round endpiece 4 and the magnet 14 is fixed to an inside surface 13 of the other hinge piece 9. Another magnet 18 which makes attraction with the magnet 14 to each other is fixed to the temple 5 side to constitute the temple in such a manner that the temple slides in a distance range where the attraction forces of the two magnets 14, 18 act. However, the contact of the two magnets 14, 18 in the nearest state does not arise and there is a slight spacing between the same; in addition, guides 10, 10 for sliding of the hinge piece 9 and temple 5 with each other together with the magnetic 14, 18 are formed. Since the magnets are used as the recovering force to allow the opened temple to restore the normal opening degree, the smaller and lighter joint structure consisting of the smaller number of parts is obtd. |
