| 摘要 |
A device for double locking of a door lock is provided to accomplish more stable and firm lock of a door in comparison with single locking by a conventional dead bolt. A device for double locking of a door lock includes a locking device(10), a support plate, lever handles, and a thumb turn. The locking device has a dead bolt(12) or a combination of a dead bolt and a latch bolt(13) as a latch at an end of a door or a door frame. The support plate is mounted to an end of an opposite door frame or the door to correspondently connect the dead bolt or the latch bolt of the locking device. The lever handles and thumb turn are installed inside and outside the door and inside the door respectively to open and close, and lock and release the door by operating the locking device.
|
