| 摘要 |
A rotary wheel cap includes a fixed base fixed to a center of a wheel, a rotary cover axially mounted onto the fixed base, and an elastic member installed between the fixed base and rotary cover. When the wheel rotates, the rotary cover compresses the elastic member to a first position to form a positioning relationship with the fixed base, such that the rotary cover is rotated with the wheel and fixed base at the first position. When the wheel is still, the rotary cover is supported by the elastic member at a second position to release the positioning relationship with the fixed base. The rotary cover is rotated axially with respect to the fixed base by gravitation of a weight balancing portion at the second position. A design pattern on the rotary cover is aligned correctly by the axial rotation of the rotary cover when the wheel is still.
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