| 摘要 |
An endpiece (E) is composed by disposing a pair of elastic inner and outer wiring or plating parts in juxtaposition. An outer part external member ( 1 ) is adopted to keep a shape and structure of the endpiece (E) intact and reinforced. The inner part is a buffer piece ( 2 ) doubled back into a hairpin shape and has at least a first bending portion ( 21 ) of convex shape and a second bending portion ( 22 ) of concave shape. When a temple (T) is unfolded to excess, the first and second bending portions ( 21 ) and ( 22 ) flexibly bend towards a direction to which those portions expand so as to counterbalance stress to which the external member ( 1 ) is subjected.
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