| 摘要 |
PROBLEM TO BE SOLVED: To provide a fastening structure of high-tension filaments, which are high in the tensile strength of the plastic filaments of a Nylol (R) frame for holding the lenses by fastening the plastic filaments to both ends of half rims. SOLUTION: Both ends of the half rims 1 are provided with hooks 9 and 9, and the plastic filament ends are fastened to these hooks 9 and 9. The front ends are heated so as not to loosen knots 11 and 11, by which balls 10 and 10 are formed.
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