Patent attributes
A buckle comprises a female fastener, a male fastener, a movable member, a key lock and a combination lock. The female fastener has a mounting opening, an insertion opening and two side holes defined respectively on different sides of the female fastener. The male fastener is provided for inserting into the female fastener and has two elastic pillars. Each one of the two elastic pillars has an outward projection for inserting into corresponding one of the two side holes. The movable member is installed in the mounting opening and movable between a first position and a second position. Additionally, the key lock is installed on the female fastener for controlling whether the movable member can be shifted from the first position to the second position, and the combination lock is installed on the movable member. When the movable member is in the first position, the male fastener can be locked or unlocked via the combination lock, and when the movable member is in the second position, the combination lock departs from the male fastener.