| 摘要 |
<p>A frame comprises a first arm (20) having a rear end (20b) to which a rear wheel (12) is linked, a fork (58) with handlebar (60) to which a front wheel (14) is linked, a bar (15) connecting a front end (20a) of the first arm (20) to the fork (58) and hinged to the first arm (20) about a first axis (X1) parallel to the axis of the rear wheel (12), and a post (44) supporting a saddle (42) and hinged to the first arm (20) about a second axis (X2) parallel to the axis of the rear wheel (12). The first arm (20), the bar (15) and the post (44) are interconnected by transmission means for simultaneously rotating about the axes between an operative configuration and a carrying configuration. The transmission means comprise a first engagement angular sector (54) hinged about the first axis (X1) and rotatably coupled with said post (44) via first linkages (22, 46, 48, 50, 52, 53), and a second engagement angular sector (66a") in rotary engagement with the first engagement angular sector (54) and rotatably coupled with the bar (15) via second linkages (57, 59, 64, 66).</p> |
