Interlocking method and its structure for wheel-rim cover

This invention relates to an interlocking method and its structure for wheel-rim cover, which mainly has a wheel-rim body and a wheel-rim cover body. A plurality of engaging seats is integrally formed along the peripheral edge at the rear side of the wheel-rim cover body. Each engaging seat is pivotally contacted with an interlocking block. When the interlocking blocks are rotated with the pivotal contact portions as the axis and the other ends of the interlocking blocks pass through the horizontal radial line of the axis, both ends of each interlocking block will abut tightly against the wheel-rim body and the wheel-rim cover body respectively in view of the length between both ends of each said interlocking block being made to be larger than the vertical distance from the engaging groove of the wheel-rim body to the inside edge of the pivotal contact end of the interlocking block and the wheel-rim cover body. In this manner, the wheel-rim cover body can be stably inserted and fixed in the wheel-rim body. Moreover, during the stacking of a number of wheel-rim cover bodies uncombined with the wheel-rim body, the interlocking blocks are in the state of pivotally contacting with the wheel-rim cover body such that the interlocking blocks can be rotated. Therefore, the stocking space for the wheel-rim cover bodies can be reduced, and the delivery cost of the same is decreased accordingly.