| 摘要 |
A locking device of a connection link is provided to install a locking unit having a dual locking structure in a hook of the locking device to prevent a binding unit from being separated. A hook(100) includes a link hole(111), a support hole(142), and a fixing unit(120). The link hole is formed at the upper portion of the hook. The support hole is formed at an end of the hook curved upwardly while extending to a lower portion of the link hole. The fixing unit is provided with a locking protrusion(122). A support shaft(220) receives elasticity such that a support plate(210) moves back and fort or rotates. A locking groove(213) and a stop protrusion(212) are formed at an end of the support plate.
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