| 摘要 |
A secondary locking device which is fitted to the inside of a door adjacent to the latch 5 of the door, the device is moveable from a position where the device engages with a groove (4, fig 2) on the latch of the door thereby securing the latch 5 in a locked position, to a position where the device is disengaged with the latch 5 allowing the door to be opened. Preferably the device is attached to the inside surface of the door, and mounted to slide vertically with a large handle 2 to allow the device to be used by the persons with limited hand mobility. A section of the device is angled 3 to engage with a groove (4, fig 2) inserted in the top of the latch 5 of the door. Preferably the device has an emergency release mechanism to allow the device to be released from outside, consisting of a lifting pin 8 that rotates tangentially against the underside of the handle 2 of the device, the lifting pin 8 is accessed on the external side of the door via a covered access point (12, fig 2) and may be turned via a key 13 that is rotated through 60 degrees. |
