| 摘要 |
A hub anti-escape device for a bicycle having a pair of supports, preferably dish-like shaped, which are inserted over a main shaft of a hub for the bicycle to be engageable with portions formed at the outer surfaces of a pair of fork ends of the bicycle frame respectively and subjected to a resistance above a given amount against movement of the supports in the radial direction, i.e., the direction in which the main shaft comes off the fork ends. A spring, mounted on the outside of at least one of the supports, urges the support towards the outer surface of the fork end, and is compressed with tightening structure for the hub, so that the device is adapted to prevent the escape of the main shaft from the two supports by the engagement of each of the supports with each of the fork ends even when the tightening structure loosens or the main shaft is not completely secured.
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