| 摘要 |
PROBLEM TO BE SOLVED: To provide a ring-shaped accessory causing no tightness in wearing, easily and quickly wearable even by an inexperienced person and capable of imparting a proper close contact feeling to the body in wearing in the ring- shaped accessory such as a necklace and a bracelet of a type of being worn in close contact in wearing part such as a neck and a wrist. SOLUTION: This extendable member composed of a cylindrical pipe having a cover part having blocked-up one end and having a through hole for inserting a rod part of a piston-shaped long rod on the other end, the piston-shaped long rod having a flange part having a diameter slightly smaller than a pipe inner diameter on the tip slidingly inserted into the pipe, a spring body sandwiched and installed between the flange part and the cover part in the cylindrical pipe and energized in the expanding direction and hookingly fastening tools attached to the blocking-up end of the cylindrical pipe and the rear end of the piston-shaped long rod, is interposed in a midway part of an accessory body.
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