Mountain-bike.

摘要

A bicycle (10) of the "mountain bike" type has two aligned foldable joints (38,39) in the frame (11), a folding handlebar assembly (21) and a foldable pedal (33). Each of the frame joints is mounted in a gap in a tubular frame member (14,15) and includes two disks (41) disposed flushly against the ends of the frame members with smaller plugs fast in the members, and two hinge leaves (42,43) extending across the gap longitudinally of the frame. A rivet (49) on one side of the joint joins two ears (48) on the leaves to form the hinge axis (40), and a headed fastener (51) with a hexagonal socket (52a) is recessed into the thickened central portion (47) of the upper leaf (42) and threaded into the lower leaf (43) to clamp the leaves together. Interlocking ribs (50) between two ears (48) on the other side of the joint prevent relative pivoting movement when the leaves are clamped together. The handlebar assembly (21) has upper and lower tubular adjustment sections for both upward and forward adjustment of the handlebar and an angled hinge (55) between these sections to enable folding of the handlebar into a lowered position in which it extends in a fore-and-aft direction alongside the frame (11).