| 摘要 |
PURPOSE: A door lock device is provided to allow a user to open a door at the interior room in emergency conditions by opening the door through only the rotation of an interior switch. CONSTITUTION: A door opening/closing apparatus comprises an indoor switch, a rotating unit(50), and a bolt(60). The indoor switch is operated by a user. The rotating unit is rotated according to the operation of the indoor switch. The bolt opens/closes a door according to the rotating operation of the rotating unit. The rotating unit comprises an extending bar(54). The bolt comprise a protrusion(61) connected with the extending bar. The door opening/closing apparatus includes more a guide bar. The bolt comprises a slit moving the bolt according to the guide bar which passes through the slit.
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