| 摘要 |
A foldable bicycle frame includes a head tube, a downtube unit, a chain stay unit, a telescopic seat unit, and a seat stay unit. The head tube is adapted to be coupled with a front fork for carrying a front bicycle wheel. The downtube unit has a front end connected to the head tube, and a rear end. The chain stay unit has a horizontal front end portion that is connected foldably to the rear end of the downtube unit and that is adapted to be mounted with a crank arm assembly, an inclined vertical rear end portion, and a middle portion that is between the front and rear end portions and that is provided with means for carrying a rear bicycle wheel thereon. The telescopic seat unit has a top end adapted to be mounted with a bicycle seat thereon and a bottom end connected pivotally to the front end portion of the chain stay unit. The seat stay unit has a front end pivoted to the top end of the seat unit and a rear end pivoted to the rear end portion of the chain stay unit.
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