| 摘要 |
PROBLEM TO BE SOLVED: To provide a bicycle preventing change in an angle of a seating face of a saddle and in a distance between the saddle and pedals even when a riding posture is changed and maintaining easy pedaling at a constant level. SOLUTION: The bicycle 10 is provided with: a front wheel 11; front forks 15 for holding the front wheel 11; a head tube 20 for holding the front forks 15; a main tube 12 extended rearward and slantedly downward from the head tube 20; a bottom bracket 30 continued to the rear end of the main tube 21; a chain stay 22 extended rearward from the bottom bracket 30; a rear wheel 12 held by the chain stay 22; a parallel link mechanism 40 provided with lower two shafts juxtaposed forwards/backwards in the vicinity of the bottom bracket 30 and with an upper link member 43 of which front and back sides are journaled to upper two shafts and which oscillates forwards/backwards; and the saddle 70 continued to the upper link member 43 of the parallel link mechanism 40 and oscillating forwards/backwards together with the upper link member 43. COPYRIGHT: (C)2008,JPO&INPIT
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