| 摘要 |
PROBLEM TO BE SOLVED: To provide a bicycle frame to keep an easily ridable distance between the handlebar and a saddle at an easy-to-ride distance in case it is used as an ordinary bicycle, and used as a two-wheeler vehicle, serving in the condition with the body width in a short distance to assure a high portability so that it can be carried into a tram or an automobile like a caster-fitted travel bag or a shopping cart, capable of being changed over between bicycle and two-wheeler easily, quickly, and certainly, offering a large mechanical strength, and manufacturable easily and quickly without requiring many buffer members by equipping the front and rear frames themselves with shock absorbing function, and also offering an improved comfortableness. SOLUTION: The front frame 3 consisting of a handle frame 1 and a front fork 2 is formed in an arc shape concave inward. A rear frame 6 consisting of a saddle frame 4 and a rear fork 5 is formed in an arc shape concave inward. The handle frame 1 and the saddle frame 4 are installed at the front extremity and tail of the main frame 7, respectively, in such a way as rotatable horizontally. A handlebar 8 and a saddle post 9 are installed on the handle frame 1 and the saddle frame 4, respectively, with the levels adjustable. COPYRIGHT: (C)2007,JPO&INPIT
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