| 摘要 |
An umbrella includes an elongated stem having telescopically connected inner and outer tubular segments, a top hub secured to the inner tubular segment to define an upper annular space therebetween, a tubular runner surrounding the stem, slidable between upper and lower positions to spread-out or collapse a canopy and rib assembly, and spaced apart from the inner tubular segment to define a lower annular space therebetween, a tubular spacer slidably sleeved on the inner tubular segment to be inserted into the lower annular space when the runner is displaced to the upper position so as to prevent wobbling movement of the runner, and movable by the outer tubular segment to be thereby withdrawn into the upper annular space when the outer tubular segment is displaced to the retracted position, and a biasing member disposed to bias the spacer into the lower annular space.
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