| 摘要 |
PURPOSE: A locking device of a door including an emergency releasable unit is provided to improve the inconvenience of a user by releasing the unlocked state of the door using a master key. CONSTITUTION: A locking main body is installed in a door. A locker(20) is installed in the locking main body. One end of the locker is supported by a spring. The other end of the locker is inserted into the locking groove of a door frame. A first operation includes a hinge shaft rod(301), a lever(302), a fist driving piece(303) and a fixing piece(304). A second operation unit(40) includes a key groove which is formed on the front side of the locking main body and a key shaft rod including a second driving piece. A master key releases the locker regardless of the first operation unit.
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