초록 ▼

A folding tricycle, maximizing the exercise effect by allowing a user to pedal the tricycle while standing up on the pedals, as well as being easy to move and carry by being folded to be of a small size, is disclosed. The folding tricycle has a running unit consisting of a main frame, two front whee

A folding tricycle, maximizing the exercise effect by allowing a user to pedal the tricycle while standing up on the pedals, as well as being easy to move and carry by being folded to be of a small size, is disclosed. The folding tricycle has a running unit consisting of a main frame, two front wheels, and a rear wheel. The main frame consists of two frame parts with a first folding part joining the two frame parts together, thus being foldable at the folding part. The two frame parts respectively have a front wheel shaft housing and a rear wheel support assembly. The tricycle also has steering unit used for steering the rear wheel. The steering unit has a second folding part, thus being foldable at the second folding part. The tricycle also has a brake unit used for selectively braking the front wheels. In addition, the tricycle has drive unit used for generating a rotating force and transmitting the rotating force to the front wheels through two front wheel shafts alternately acting as driving and driven shafts. The drive unit is designed to generate the rotating force from the pedals operated by a user standing up with both feet being placed on the two pedals.

대표청구항 ▼

1. A folding tricycle, comprising: a running unit, said running unit including a main frame, two front wheels, said two front wheels mounted at a front end portion of said frame, and a rear wheel mounted to a rear end portion of the frame, said main frame consisting of two frame parts with a firs

1. A folding tricycle, comprising: a running unit, said running unit including a main frame, two front wheels, said two front wheels mounted at a front end portion of said frame, and a rear wheel mounted to a rear end portion of the frame, said main frame consisting of two frame parts with a first folding part joining said two frame parts together, thus being foldable at the said folding part, said two frame parts respectively having a front wheel shaft housing and a rear wheel support assembly; a steering unit used for steering said rear wheel, said steering unit having a second folding part, thus said steering unit being foldable at the second folding part; a brake unit used for selectively braking the front wheels; and a drive unit, said drive unit including two pedals used for generating a rotating force and transmitting the rotating force to said front wheels through said two front wheel shafts alternately acting as driving and driven shafts, said drive unit being designed to generate the rotating force from said pedals operated by a user standing up with both feet being placed on the said two pedals. 2. The folding tricycle according to claim 1, wherein said steering unit consists of: a steering shaft rotatably and vertically mounted to said main frame and having said second folding part in its middle portion; a steering handle mounted to an upper end of said steering shaft; and two steering wires extending from a pulley of said steering shaft and intersecting each other prior to being coupled to both ends of said rear wheel support assembly. 3. The folding tricycle according to claim 1, wherein said brake unit consists of a brake lever and a brake band with a brake wire extending from said brake lever to said brake band. 4. The folding tricycle according to claim 1, wherein said drive unit comprises: two pedal assemblies, each of said pedal assemblies including a support rod and one of said two pedals, said support rod being rotatably coupled to each side of the front end portion of said main frame, said pedal being hinged on an upper end of said support rod; a link assembly consisting of a link motion and a spring, said link motion being connected to both said pedal and a lower portion of said support rod at both ends thereof, said spring being held between said link motion and said main frame, and a power transmission assembly including: two plate springs set in the middle portion of said front wheel shaft housing; said plate springs spaced apart from each other; the two front wheel shafts individually having a clutch gear at its inner end and projecting from each end of said front wheel shaft housing outwardly at its outer end, with the two front wheels being fixed to the outer ends of said two front wheel shafts; a pair of cam rollers; each cam roller positioned between each of said two plate springs and an associated clutch gear, said each roller being connected to an inner end of said plate spring at an its inner shaft and being supported on a center of said associated clutch gear at an outer shaft, said each cam roller also having a side structure designed to selectively push an engaging ring during a forward directional rotating action thereof and to selectively pull said ring during an inverse directional rotating action; the engaging ring movably positioned around said outer shaft of the cam roller, and having an engaging projection on its inside surface and an engaging tooth on its outside surface; a restraining element mounted on an outer surface of said front wheel shaft housing and adapted for preventing said engaging ring from being rotated when the ring is pushed or pulled; and a band caught by an upper end of said link motion at its first end, and fixed to and wound around said cam roller at its second end.