| 摘要 |
A castor assembly includes a castor body, a threaded rod rotatably mounted on the castor body, a lower adjusting cover surrounding the threaded rod to cover the threaded rod and secured on the threaded rod to rotate the threaded rod relative to the castor body, an upper adjusting cover surrounding the threaded rod to cover the threaded rod and retractably mounted on the lower adjusting cover, and an elastic member mounted on the threaded rod and biased between the threaded rod and the upper adjusting cover to push the upper adjusting cover outwardly relative to the lower adjusting cover. Thus, the threaded rod is covered by the lower adjusting cover and the upper adjusting cover to enhance the aesthetic quality of the castor assembly.
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