| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely release a loop state of a ball chain when a load not smaller than a prescribed value in a direction in which a loop is extended is applied to the loop-state ball chain irrespective of a position of a connecting member.SOLUTION: A through-hole 13a which can penetrate a ball part 11b of a ball chain is formed at a connecting main body 13 of a connecting member 12 which connects both ends of the ball chain 11, and a ball passing part 13b which communicates with the trough-hole, and allows the passage of the ball part is formed at a center external peripheral face of the connecting main body in a longitudinal direction. At least a part of a pair of slits 14, 15 which extend to both ends of the connecting main body from both ends of the ball passing part is formed narrower than a diameter of a cord part 11a of a ball chain, and a pair of protrusions 16, 17 are protrusively formed at both ends of the trough-hole or in the vicinity of the ends. An eccentric part 18 which transits the gravity center of the connecting main body to a side opposite to a face at which a pair of the slits are formed with respect to an axial line of the eccentric part is integrally formed at the connecting main body.</p> |
