| 摘要 |
PURPOSE: The door lock apparatus is provided to dually lock door with the first dead bolt and the second dead bolt and to improve the security of the door locker. CONSTITUTION: The first dead bolt(20) and the second dead bolt(40) are installed to the housing in the direction of the protrusion and immersion in order to move straight the housing. The first rotational member(60) is connected to the first dead bolt in order to be transferred in a straight line to the projection direction of the first dead bolt. The second rotational member(70) is combined in the housing. The clutching unit blocks the second rotating member and the second dead bolt for the linear movement protection of the second dead bolt.
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