A spring hook includes two hook arms pivotally connected to a central column, and the lower arm bodies of the two hook arms are supported by a spring, so that a lock ring defined by the two upper arm bodies is kept normally closed. When pressure is applied to the two lower arms, the two upper arms rotate outward to open the lock ring, allowing a buckle ring to hook with the lock ring. When the second lower arm body is released, the lock ring is automatically closed due to the action of the spring, so that the buckle ring is locked with the spring hook. When only one hook arm is touched, the lock ring is only partially opened, and the buckle ring and the spring hook are not likely to be disconnected, and the risk of accidental opening of the spring hook due to accidental contact is minimized.一種彈簧鉤，包含二鉤臂樞接在一中心柱上，二鉤臂的下臂身支撐於一彈簧，使二上臂身所界定的一鎖圈保持常閉。當施壓於二下臂身時，二上臂身向外轉動使鎖圈打開，允許一扣環與鎖圈相掛鉤。鬆開二下臂身時，鎖圈因彈簧的作用自動閉合，使扣環與彈簧鉤相鎖扣。當只有一鉤臂被觸動時，鎖圈僅局部開啟，扣環與彈簧鉤無脫鉤之虞，將彈簧鉤因誤碰而意外開啟的風險降至最低。
