| 摘要 |
A door lock has an outside doorknob assembly having an outside doorknob and a lock core, an inside doorknob assembly having an inside doorknob and a latch button, an arresting assembly and a latch assembly. The arresting assembly has a retaining blade connecting the lock core and the latch button, a driving tube mounted rotatably around the retaining blade, a recessed arrestor slidably and non-rotatably mounted on the retaining blade and a protruding arrestor slidably mounted rotatably on the retaining blade and selectively engaging with the recessed arrestor. The latch assembly has a driving element interacting with the driving tube and a latch bolt connected to the driving element. A person can turn the latch button to rotate the retaining blade to drive the recessed arrestor to smoothly engage with or detach from the protruding arrestor to selectively lock or unlock the door lock.
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