| 摘要 |
<p>The present invention relates to a security door lock. The security door lock according to the present invention comprises: a locking module installed on a door; a first latch which is operated toward the inner surface of a knob-side door frame of the door by the locking module to control opening/closing of the door; a second latch which is operated toward the inner surface of a hinge-side door frame of the door by the locking module to control the opening/closing of the door; and a holding member installed on the inner surface of the hinge-side door frame to hold the second latch which has been operated to the inner surface of the hinge-side door frame of the door frame. The present invention as described above is advantageous in that, when a shock larger than a predetermined level is applied to the door, the mode of the security door lock is switched into an emergency state, thereby completely controlling the opening/closing of the door.</p> |
