| 摘要 |
PURPOSE: A subsidiary lock for a door is provided to maximize a crime prevention effect by maintaining an opened locking state. CONSTITUTION: A subsidiary lock(10) for a door comprises a locking unit(12). The locking unit is formed in the other side of a door lock body. The locking unit is locked or unlocked by a dead bolt of the door lock body. A hinge unit, which is rotatably fixed to a wall or a door, is formed in the subsidiary lock. An opened locking state of the door is maintained by allowing the dead bolt of the door lock body to lock the locking unit.
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