| 摘要 |
<p>A door lock apparatus operated so as to ring and be heard only indoors, without ringing and being heard outdoors when movements outside a door are detected, thereby improving the function of keeping watch indoors over the outdoor movements. The door lock apparatus includes a door lock provided both with a chime bell and with a camera, the door lock being installed outdoors; and a monitoring unit displaying operations of the chime bell and of the camera thereon and selectively opening or closing a door, the monitoring unit being installed indoors, wherein the door lock is further provided with a motion sensor, and the monitoring unit is configured such that, when movements outside the door are detected by the motion sensor, the monitoring unit receives a captured image and simultaneously operates the chime bell so as to ring and be heard only indoors, without ringing and being heard outdoors.</p> |
