| 摘要 |
PURPOSE: A locking structure of a tight door is provided to prevent a door from being easily unlocked at a locked position because a locking hanger of a dog is coupled with a latch. CONSTITUTION: A locking structure of a tight door comprises a latch and a dog(30). The latch is installed around an opening of a frame. The dog is rotatably coupled to a door for closing the opening and has a locking hanger(36). The locking hanger makes the door be attached to the frame while moving along an inclined surface of the latch. One end of the dog becomes an operating lever and the other end thereof becomes the locking hanger. A pin(41) is arranged in the middle of the lever and the locking hanger so that the locking structure can be rotatably coupled to the door.
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