| 摘要 |
A door lock mechanism includes a rotatable spindle, an invertable tubular adapter, a doorknob and an interchangeable lock core. The rotatable spindle has a first longitudinal assembling slot, a second longitudinal assembling slot and a pair of retaining notches. The invertable tubular adapter has a third longitudinal assembling slot, at least one positioning protrusion and an upraised engaging block. In assembling, the third longitudinal assembling slot of the invertable tubular adapter and one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle are aligned to receive the interchangeable lock core. The upraised engaging block is engaged with one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle. The positioning protrusion is positioned in one of the retaining notches of the rotatable spindle to prevent any radial movement of the invertable tubular adapter in the rotatable spindle.
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