Concealed hinge for box body

The utility model provides a concealed hinge for a box body, which solves the problem that the box body and a cover body are inconvenient to separate and the like, and comprises a movable sleeve fixedly connected with the box body, a movable shaft capable of moving up and down relative to the movable sleeve is arranged in the movable sleeve, the movable shaft is rotatably connected with a movable part through a pin shaft, and the other end of the movable part is fixedly connected with one side of the cover body. A limiting mechanism for limiting the circumferential rotation angle of the movable part and the cover body is arranged between the movable part and the cover body, and an anti-disengaging mechanism for preventing the movable shaft from disengaging from the movable sleeve is arranged between the movable shaft and the movable sleeve. The turnover device has the advantages of stable structure, convenience in turnover and the like. 本实用新型提供了一种箱体用内藏式铰链，它解决了箱体与盖体分离不便等问题，其包括与箱体固定连接的活动套，活动套内安装有可相对活动套上下活动的活动轴，