| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball chain with a fail-safe function.SOLUTION: The ball chain is formed by forming synthetic resin balls with an equal interval on a cord to be fixed, and both end parts of the ball chain are connected by a connecting part to get endless, the connecting part 16 includes an engagement part formed into the shape same to that of the ball, the engagement part is constituted of the first engagement part 21 provided with a shaft-like engagement protrusion 22, and the second engagement part 25 provided with an engagement hole 26 engageable with the engagement protrusion 22, and the engagement protrusion 22 is elastically engageable with the engagement hole 26. |
