| 摘要 |
PURPOSE: A door lock device for adjusting the length of a movable shaft freely according to the thickness of a door is provided to install a door lock easily regardless of the thickness of a door. CONSTITUTION: In the door lock device regulating the operation of a door by rotating a movable shaft(400) and appearing/disappearing a locking bar(110) equipped to a bundle of locks(100) by turning a doorknob(210) or turning a key in a bundle of keys(340), an open-cut groove(222) is formed on a shaft coupling hole(221) of a movable shaft coupling part(220) formed on the front end of the doorknob(210), a front end of a spring(230) is coupled to the open-cut groove(222), and the front end of the movable shaft(400) gets elasticity of the spring(230) according to the thickness of the door and interposed to the shaft coupling hole(221) to adjust the length of the movable shaft(400) naturally when coupling the other side of the front end of the movable shaft(400) coupled with one side of the front end of a bundle of keys(340) to the shaft coupling hole(221).
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