| CPC E05C 17/54 (2013.01) [G08B 13/08 (2013.01)] | 13 Claims |
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1. A self-acting door security device comprising:
a latch bolt of a locking module configured to be installed on a swinging door, and the latch bolt configured to engage with a latch hole of a striker mounted on a door frame to enable the locking/unlocking operation of the swinging door;
an insert plate configured to be inserted into a gap between the swinging door and the door frame;
a locker plate integrally formed with the insert plate;
a fastening piece protruding on an outer end of the insert plate and configured to engage with the latch hole of the striker;
a stop holder formed through the locker plate; and
a stopper member including a stop pin which is configured to be fastened to the stop holder of the locker plate to prevent movement of the door;
wherein the stop pin includes:
a shaft fitted into the stop holder, and
an expansion piece formed at an end of the shaft,
wherein the stop holder includes:
an insertion hole into which the expansion piece is inserted;
an inclined rail which is connected to the insertion hole, has an elongated hole having a diameter smaller than that of the insertion hole to accommodate the shaft, and is formed with a slope angle inclining toward the fastening piece; and
a fitting hole which is arranged on the inclined rail, has a size smaller than that of the insertion hole to engage with the shaft,
wherein the fitting hole is formed in the opposite direction to the insert plate based on the inclined rail, and
wherein when the shaft moves downward along the inclined rail, the stopper member is inclinedly moved so that the shaft is limited in movement by engaging with the fitting hole at a point where the stopper member is in contact with the door.
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