| 摘要 |
PROBLEM TO BE SOLVED: To provided spectacles which allows a sub-frame to be easily attached thereto and detached therefrom and allows the sub-frame to be flipped up and has improved appearance and practicality. SOLUTION: A round wire made of a material with spring property and a flat spring are attached to the sub-frame, so that the sub-frame can be attached and detached by the spring property of the round wire and can be smoothly flipped up by the flat spring. A front bar is given to improve the appearance. COPYRIGHT: (C)2007,JPO&INPIT
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