QUICK-FOLDING BICYCLE

摘要

A quick-folding bicycle. A front arm (1) and a middle arm (3) are hinged. The middle arm (2) is fixed to a middle pipe (3). A rear fork (4) is hinged to the middle pipe (3) or to the middle arm (2). The middle pipe (3) has sleevingly arranged therein a relatively slidable seat pipe (5). The seat pipe (5) has arranged at the lower end thereof a connection rod base (12). A joint bearing (72) at the front end of a front connection rod (7) is connected to a fixing base (71) under the front arm (1). The joint bearing (72) at the rear end of the front connection rod (7) is connected to the connection rod base (12). Two ends of a rear connection rod (8) respectively are hinged to a rear fork (4) and to the connection rod base (12). The bicycle allows for expedited and convenient folding and is provided with a rigid structure, ease of manufacturing, and great aesthetics.