| 摘要 |
A door lock is provided which is capable of use as a night latch. It includes a pin tumbler cylinder lock so that the key can only be removed when the lock is in a locked position, a pinion engaging with a rack on a bolt adapted to be retained in a recess in the jamb of the door frame, when the door is closed, by a latching mechanism, lying perpendicular to the bolt. The latching mechanism is provided with a release mechanism whereby the door lock can be easily opened in an emergency by, for example, a child whereby the door can be quickly opened and the child escape through the door opening.
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