| 摘要 |
A fixing device for a hub and a tube of a baby stroller frame includes a hub including an axial hole having two ends, each end of the hub having a bearing mounted therein. A tubular shaft of an appropriate length includes a longitudinal hole having two ends, each end of the shaft including a compartment having a diameter greater than that of the longitudinal hole of the shaft. One of the ends of the shaft includes an outer periphery with an outer threading formed thereon. The other end of the shaft is extended beyond the hub and includes two radial holes, a ball being partially received in each radial hole and partially exposed beyond the radial hole. A core rod includes an enlarged first end and a second end with a neck portion and a groove. A spring is mounted around the core rod. A dust cap is a soft cap made of plastic material with resiliency to provide a chamber for receiving the enlarged first end of the core rod that is extended beyond the shaft. The dust cap includes a dome that forms a push portion and a skirt that forms a connecting portion having a diameter smaller than that of the dome, the dust cap preventing entrance of dust into the axial hole of the hub. The balls on the shaft are biased outward by the core rod and thus exposed at a position bearing against an end of the fixing sleeve, thereby completing assembly of the baby stroller frame and the hub.
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