| 摘要 |
PURPOSE: A caster is provided to prevent the rotation of a dust cover coupled with a top plate and displays an injection hole formed on the dust cover. CONSTITUTION: A caster comprises a top plate(110), a dust cover(120), a first ball cover, a second ball cover, a washer stopper, a top pin, a support bracket, a plurality of balls, and a wheel. The top plate is coupled with a loading portion for luggage. The dust cover is contacted with the bottom portion of the top plate and comprises an injection hole(126) on the side portion. The washer stopper is contacted with the second ball cover. The top pin supports the cast to locate the dust cover between the top plate and the first ball cover. The support bracket is installed to be rotated based on the top pin. The wheel is installed in the bottom portion of the support bracket. The caster prevents the rotation of the dust cover and displays the coupling location of the top plate and the dust cover.
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