| 摘要 |
PROBLEM TO BE SOLVED: To provide a blind rotation mechanism capable of securing safety even when operation force equal to or greater than prescribed force has applied in the axial direction of an operation chain, and capable of easily restoring a connector to its original state.SOLUTION: A connector 170 for connecting both ends of an operation chain 160 to make the chain be in a loop shape includes: a first insertion part 171 which is provided at one end of the operation chain 160, and into which a ball part 161 is to be inserted; and a second insertion part 172 which is provided on the side opposite to the first insertion part 171, and into which a ball part 161 provided at the other end of the operation chain 160 is to be inserted. At the second insertion part 172 is formed an easily deformable part 172b, which is deformed to enable the ball part 161 to separate from the second insertion part 172 when operation force equal to or greater than prescribed force has applied in the axial direction of the operation chain 160. Thereby, even when operation force equal to or greater than the prescribed force has applied in the axial direction of the operation chain 160, safety is secured and the connector 170 can be easily restored to its original state.SELECTED DRAWING: Figure 6 |
