| 摘要 |
PCT No. PCT/GB86/00100 Sec. 371 Date Oct. 16, 1986 Sec. 102(e) Date Oct. 16, 1986 PCT Filed Feb. 24, 1986 PCT Pub. No. WO86/05155 PCT Pub. Date Sep. 12, 1986.A collapsible bicycle comprises a triangular frame formed from three struts A, B and C. The bottom strut C can be disconnected from the forward strut B by operating a releasable pivot joint J so that the strut C can be folded up against the rear strut A. A universal joint between struts A and B then allows these two struts to be folded to lie alongside one another with the pair of wheels W1 and W2 lying side by side. Cranked portions 7 and 8 of the struts A and B provide offset supports for the wheels to one side only so that they can readily be positioned side by side and ideally locked together. The folded framework can then be transported, if required, by grasping a support 6 or handlebars H and running the unit along the ground on the pair of wheels W1 and W2. A saddle S is adjustably mounted on the rear strut A by a sliding support 39 having fixing clamps 40. The bicycle is preferably driven from pedals P by means of a drive belt D rather than a chain and the front pulley 3 can incorporate a freewheel unit 5 and/or gearing. |
