| 摘要 |
The hook (1) has a buckle (3) with a U-shaped opening and a penetration groove that traverses two interior sides and an exterior side of the buckle. A spring and a moving axle traverse across the groove. The axle is positioned by a pin (P), and a notch is formed on the axle. A semicircular groove is formed at a part connecting the buckle and the notch, and another semicircular is positioned across the buckles interior sides. The width of the U-shaped opening is determined by size of a chain before being suspended at the hook. The moving axle is positioned by a pin such that the spring is compressed by the axle and the axle does not fall from the buckle. |
