| 摘要 |
PROBLEM TO BE SOLVED: To provide a hinge which has no spacing at the joints of a lens frame and temples and has a function to relieve the tightening of the skin. SOLUTION: A coil spring 13 is freely extensibly and contractably housed in the lens frame 3. An arm 6 for a hinge with an oblong hole 99 having a circle of the locus of the center as a part is formed at the front end. An arm 10 having mounting holes 11, 12 for a revolving shaft 17 is formed at the temple 4. Both are combined and are formed to have a structure that the revolving shaft 17 moves along the oblong hole 9 when the revolving shaft 17 is inserted and connected while extending a coil spring 13 and the temple 4 is pushed and opened more to the outer side from an open state and that formation of a spacing at the outer edge 18 of the joint between the frame 3 and the temple 4 is averted and the revolving shaft automatically returns to the home position when the force is removed at times exclusive of the close time.
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