| 摘要 |
<p>An exercise cycle has a frame comprising three rigid frame members (21,24,30) each connected separately with the other two members. One of the members carries a seat (11) and a crankshaft (14) carrying a pulley (17). A brake wheel (18) is mounted on a further one (24) of the members and is driven from the pulley by a belt drive. The frame can be folded to move the brake wheel towards the crank axis.</p> |
