| 摘要 |
A door auto lock device (10) having a latch (30) provided on a door frame (20) with an openable door (21) provided on the inside thereof and a lock arm (36) installed rotatably on the door (21) through a rotating pin (35) and engageable with the latch (30), comprising a lock arm driving mechanism (40) rotating the lock arm (36), a locking sensor (61) and an unlocking sensor (62) detecting the locked and unlocked statuses of the lock arm (36), respectively, a door sensor (64) detecting the opened and closed statuses of the door (21), a buzzer (65) informing that the door (21) is left ajar, key entry means (66) provided on the inside of the door (21) and used to input a lock arm (36) unlocking instruction, and a control device (50) checking a signal from the key input means (66) and a door (21) closed status detection signal from the door sensor (64) and unlocking the lock arm (36) and, when the door (21) is closed from the open status, transmitting a lock arm (36) locking signal.
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