| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bicycle with a small and light support device. Ž<P>SOLUTION: This bicycle 2 includes a main frame 4, a front wheel 8, a rear wheel 10, a pair of auxiliary wheels 16 positioned on the right and the left side of the main frame 4, and a pair of support devices 18 supporting the auxiliary wheels 16. Each of the support devices 18 includes an arm 46, and an expander 48. On one end of this arm 46, the auxiliary wheel 16 is pivotally attached. The other end of this arm 46 is pivotally attached to the main frame 4 rotatably. One end of this expander 48 is pivotally attached to the main frame 4. The other end of the expander 48 is pivotally attached to the arm 46. This expander 48 is configured to be expanded and contracted by rotation of the arm 46. This expander 48 includes a lock mechanism inhibiting expansion and contraction. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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