| 摘要 |
A pedal powered vehicle has a frame 41 including a head tube 42 and a seat tube 44 mounting a seat post supporting a saddle. A head set cooperates with the head tube to mount an assembly comprising handlebars and a front fork. The mounting comprises a linkage system with one or more elongate struts 49 defining a longitudinal direction. A first fitting 53 couples the linkage system to one of the head tube 42 and head set. A second fitting 54 couples the linkage system to one of the seat tube 44 and the seat post. Each of said first and second fittings 53, 54 is coupled to the elongate strut 49 or struts in a manner allowing pivoting motion of the fitting relative to the longitudinal direction about an axis which extends at right angles to the plane including the axes of the seat post and of the head tube 42. The linkage system allows continuous sliding adjustment of the one or more struts 49, e.g by telescopic action, to accommodate changes in the separation of the first fitting 53 from the second fitting 54 in the longitudinal direction due to compliance of the frame 41 in use of the vehicle. An auxiliary seat 45 for a child is mounted to the linkage system at a position intermediate the seat tube 44 and head tube 42. The linkage system also carries adjustable foot supports 91-98. |
