| 摘要 |
This invention relates to a wheel unit for a slidable infant chair. The characteristic of this invention is in that there is a rod cap positioned at the upper part of the wheel unit. The rod cap has a hollow for receiving in a rod. There are two opposite U-shape cut, whose interiors become two elastic fragments, positioned in the upper side wall of the rod cap. The lower side wall of the rod cap is attached by a flanged annulus, which has fine projecting stripes around the side surface and has a splintery upward surface. In assemblage, first, insert a rod into the hollows of a rod supporter and the rod cap so as to assemble them. Then, insert the upper part of the assembled wheel unit into a fixing sleeve under an annular frame of a slidable infant chair, with the condition that the two opposite U-shape fragments spring outward for the wheel unit to be fixed in the fixing sleeve.
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