Abstract: A collapsible exercise bicycle mainly has a front wheel rod, a rear wheel rod and a diagonal rod; a handlebar is disposed at the top end of the front wheel rod and a saddle is mounted on the diagonal rod; both of the rear wheel rod and the diagonal rod are respectively connected in two segments; the connected ends thereof are disposed with retaining devices; wherein a fastening base with a rotatable moving piece is disposed on the retaining device; a press bar pivotally connects with the moving piece for coupling the fastening base; by controlling the press bar retains and detaches in a notch of the fastening base, the diagonal and the rear wheel rods can be fastened for the user to ride and made into a foldable state for folding the bicycle body into a smaller volume convenient for transportation, storage or placement in a backpack for carrying.

Abstract: An improved structure of multifunctional scooter mainly comprises of a axle base centered with a long hole and respectively connected with the fastening frames on the two sides, two wheel axles projecting from the outer sides of the fastening frames for pivotally jointing the front sliding wheels, the front ski board or the front ice skating blade, furthermore, a connect link jointed to the said rigid axle to allow the vertical rigid axle on the front end of the footboard to go through the said axle base and connect a drive link to the two bottom ends of the two rigid axles; a rear sliding wheel, a rear ski board or a rear ice skating blade disposed on the posterior aspect of the footboard to allow the player while stepping on the footboard surface and sliding on the ground, the snow or the ice to be able to step on the two sides of the footboard to make the rigid axles to deflect leftward or rightward to achieve the controlling of the travel directions of the scooter.

Abstract: A driving structure between front and rear wheels has two gear disks with wheel hub sleeves, pushing rolls and axle cores are inserted at the centers of the gear disks. Arresting members with polygonal crown supporting ribs on the circumferences are mounted between the axle cores and the pushing rolls to form wheel hubs disposed on the turning axles of the front and the rear wheels of the mobiles such as the bicycle and beach mobile. Two bevel gears are engaged with the gear disks and are connected by a steel cable so as to synchronously device the front and rear wheels.

Abstract: A folding structure of scooter mainly comprises of a front and a rear footboards and a hollow sleeve panel engaged with the front and the rear footboards, wherein the sliding grooves in the shapes of long holes are situated respectively on the side edges of the front and the rear footboards; the through holes disposed respectively on the four corners of the sleeve panel at responding positions to the sliding grooves of the front and the rear footboards for sleeving the front and the rear footboards into the sleeve panel and then insert the bolts to screw the through holes on the sleeve panel and the sliding grooves on the front and the rear footboards to make the front and the rear footboards expandable to be pulled outwards for the user to step on to slide and contractable inside the sleeve panel to reduce the volume for facilitating carriage, shipping and storage.

Abstract: An improved torsion shock absorber has a curved clevis rocker arm and a solid rocker arm. Mounting holes are formed through one rounded end each of the rocker arms and bush holes through opposite rounded ends, each having symmetrical notches respectively machined along the inner circumferences. A torsion shaft of a spring steel is inserted into the bush holes of the rocker arms, and into the holes of corresponding mounting rings and a torque seat, a faced washer and a bushing are placed in the bush hole opening of the solid rocker arm, and a C-shaped circlip is fitted into each of the two ends of the torsion shaft. The mounting holes of the clevis rocker arm and the solid rocker arm are then attached to different force receiving entities.

Abstract: An antishock structure of scooter featuring a U-shaped anchor plate having symmetrical anchor holes disposed on top and bottom of its front and back surfaces; after the lower anchor holes are connected to wheel axles respectively, the other end of wheel axles is jointed with a front wheel respectively. A lug is arranged at the upper margin of the end of each wheel axle that enables the ends of two antishock members to be connected to the upper anchor hole of said anchor plate and the lug of said wheel axle respectively. As such, when the scooter is moving, the two antishock members provide a cushioning effect.

Abstract: An improved structure scooter capable of responsive and stable, time- and energy-saving, as well as safe and convenient operation and utilization that is comprised of a footboard, a front wheel assembly, and a rear wheel assembly. The front wheel assembly is disposed at the anterior aspect of the footboard and is equipped at the center with an extension plate of a front mounting block—the extension plate providing for assembly to the footboard, a topside stem having a handhold at its upper extent and an active sleeve, and a front mounting block having a support fixture installed on its two sides. Installed to through-holes in the outer sides of the support fixtures are movable side connecting rods and situated at their lower ends are the mounting holes of axles stays that provides for the installation of front wheels. Situated at the upper ends of the left and right side connecting rods is a top connecting rod that provides for the synchronous deflection of the side connecting rods.