Abstract: The present invention relates to a twin-frame bicycle, particularly to one that can be pedaled by two riders in side-by-side coordination so that the riders and the twin-frame bicycle will incline integrally without tumbling or overturning. At least one articulation mechanism is disposed between a primary bicycle body and an auxiliary bicycle body, wherein the articulation mechanism serves in synergy an articulation parallelogram, and a resilient tension mechanism having an elastic element is disposed between the primary bicycle body and the auxiliary bicycle body and counteracts the deformation of the articulation mechanism to maintain equilibrium.

Abstract: The present invention relates to a twin-frame bicycle, particularly to one that can be pedaled by two riders in side-by-side coordination so that the riders and the twin-frame bicycle will incline integrally without tumbling or overturning. At least one articulation mechanism is disposed between a primary bicycle body and an auxiliary bicycle body, wherein the articulation mechanism serves in synergy an articulation parallelogram, and a resilient tension mechanism having an elastic element is disposed between the primary bicycle body and the auxiliary bicycle body and counteracts the deformation of the articulation mechanism to maintain equilibrium.

Abstract: The present invention provides a dual riding and driving tricycle in juxtaposing link, particularly for one that can be pedaled by two drivers in side-by-side coordination manner so that the drivers and tricycle will incline integrally without tumbling or overturning possibility; The main feature is that at least one articulation mechanism and a resilient tension mechanism are disposed between the primary bicycle body and auxiliary cycle body, wherein, said articulation mechanism serves in synergy an articulation parallelogram while said resilient tension mechanism counteract the deformation of the articulation mechanism to resume the stable equilibrium so that the integral of the primary bicycle body and auxiliary cycle body can automatically maintain harmonic coordination and stability when driving over bumpy road or corner turn.

Abstract: A dual riding and driving tricycle in juxtaposing link comprises a primary bicycle body, an auxiliary cycle body and an articulation mechanism including a resilient tension mechanism. Primary bicycle body comprises a saddle sat by a primary rider, a front wheel controlled by a steering handle, a rear wheel and a pair of pedals to drive. Auxiliary cycle body comprises an auxiliary saddle sat by an auxiliary rider, an auxiliary wheel with a hub shaft located between hubs of front wheel and rear wheel in primary bicycle body and a pair of pedals to drive. Articulation mechanism comprises a left holding base, a right holding base and two parallel linking trough beams being disposed between both holding bases. Resilient tension mechanism comprises plural elastic elements connected on articulation mechanism respectively. Thereby, primary rider and auxiliary rider can independently tread respective pedals to drive synergistically.

Abstract: A dual riding and driving tricycle in juxtaposing link comprises a primary bicycle body, an auxiliary cycle body and an articulation mechanism including a resilient tension mechanism. Primary bicycle body comprises a saddle sat by a primary rider, a front wheel controlled by a steering handle, a rear wheel and a pair of pedals to drive. Auxiliary cycle body comprises an auxiliary saddle sat by an auxiliary rider, an auxiliary wheel with a hub shaft located between hubs of front wheel and rear wheel in primary bicycle body and a pair of pedals to drive. Articulation mechanism comprises a left holding base, a right holding base and two parallel linking trough beams being disposed between both holding bases. Resilient tension mechanism comprises plural elastic elements connected on articulation mechanism respectively. Thereby, primary rider and auxiliary rider can independently tread respective pedals to drive synergistically.

Abstract: The present invention provides a dual riding and driving tricycle in juxtaposing link, particularly for one that can be pedaled by two drivers in side-by-side coordination manner so that the drivers and tricycle will incline integrally without tumbling or overturning possibility; The main feature is that at least one articulation mechanism and a resilient tension mechanism are disposed between the primary bicycle body and auxiliary cycle body, wherein, said articulation mechanism serves in synergy an articulation parallelogram while said resilient tension mechanism counteract the deformation of the articulation mechanism to resume the stable equilibrium so that the integral of the primary bicycle body and auxiliary cycle body can automatically maintain harmonic coordination and stability when driving over bumpy road or corner turn.