Abstract: A structure of multiple wheel bodies integrated with an axial base to increase contact area against the ground for securing firm and smooth operation includes at least two wheel bodies and an axial base. Each wheel body is provided to and made integrated with the axial base and shares the same outer diameter. An axial hole is provided to the axial base. The outer diameter of the axial base is smaller than that of the wheel body. The axial base may have a maximal outer diameter equal to that of the wheel body. Each wheel body wears a tire made of different material. The tire is either injection molded or casting molded, or directly mounted to the wheel body.

Abstract: A coaxial structure of auxiliary wheels and a primary wheel includes a frame, an axle, a primary wheel and two auxiliary wheels. The frame is pivotally connected to the axle. Both the primary wheel and the auxiliary wheels are separately inserted with bearings or sleeves. The bearings or the sleeves are further inserted onto the axle. Both the primary and the auxiliary wheels wear tires made of different material to increase the contact area with the ground while the frame is inclined to take a turn to prevent from turning over.

Abstract: A wheel structure includes a main wheel body, a pair of extension sections extending from respective sides of the main wheel body, and a pair of auxiliary sections coaxially extending from the extension sections, respectively. The main wheel body of the wheel has a larger outer diameter than the outer diameters of the auxiliary sections. Both the main wheel body and the auxiliary sections are provided with outer tires made in a different material. The wheel increases contact surfaces with the ground when making turns, so as to prevent overturning.

Abstract: A steering knuckle structure is incorporated with an upright pipe and a shaft wherein the upright pipe is able to twist. The steering knuckle structure comprises a fastener, a sleeve and a pair of lids. A connector is provided at the bottom of the upright pipe. The sleeve has its two ends covered by the lids. The shaft is pivotally connected to the lids. The sleeve comprises a connecting seat transversely secured at the center portion thereon. The connecting seat comprises a pair of protruding plates at respective ends. Each protruding plate has a hole at the center. The connector is placed in the connecting seat between the two protruding plates. The two holes of the protruding plates are aligned with the connector, and the fastener is inserted into the holes to secure the upright pipe to the sleeve.

Abstract: A steering knuckle structure includes a front strut, a connecting device, and a sleeve. The front strut has a connecting pipe at the bottom. The connecting device comprises an upper section and a corresponding lower section. Both the upper section and the lower section comprise extending edges with holes thereon. The upper section further comprises a slot for the front strut to insert there through. The lower section is transversely secured on the middle portion of the sleeve for the connecting pipe of the front strut to seat thereon. The upper section and the lower section are secured together to wrap the connecting pipe therein, which enables the front strut to swing relative to the sleeve.

Abstract: A scooter folding structure includes a frame, a front strut, and a quick release set. The frame comprises a pair of protection boards at a front end. Each protection board has a notch and a recess on the edge. The front strut is provided with a support strut. The support strut comprises a shaft having two ends as stoppers protruding from the protection boards of the frame. The support strut further comprises a sliding part and an elastic element. By pulling the sliding part, the two ends of the shaft are linked to detach from the notches or the recesses of the protection boards so as to fold or unfold the scooter.

Abstract: A folding structure for a scooter includes a frame, a roller, a handle frame, a linking block, a quick release set and a cover. The linking block is pivotally connected to slots of the handle frame with the quick release set. Connecting sections of the frame and the handle frame are pivotally connected with each other. The roller is pivotally connected within the connection section of the frame to seal an open space of the connecting section of the frame. The cover is secured to seal an open space of the connecting section of the handle frame.

Abstract: A fastening structure for a scooter is coupled with a front strut and a board. The front strut comprises a pair of pipes for insertion into a pair of pipes of the board. Both the pipes of the front strut and the board comprise through holes corresponding to each other. The fastening structure includes a latch, an elastic element, and a barrel. The latch has a ring secured at the center portion thereof. The elastic element sleeves onto the latch which then inserts into the barrel with the ring sliding within the barrel. One end of the latch is formed with a knob while the other end is formed with a round corner. The elastic element has its two ends engaging with one end of the barrel and the ring, respectively. The latch inserts from one end into the barrel and protrudes a portion from another end of the barrel and into the holes of the pipes of the front fork and the board to secure the front strut and the board.

Abstract: A wheel having an accelerating charger includes a wheel body, a generator unit, an accelerating gear set, and a shaft. The generator unit and the accelerating gear set are coupled in the wheel body by a shaft. The generator unit includes a magnet and a coil. The accelerating gear set has a solar gear, a pair of planetary gears, a gear plate, and a driven gear. The solar gear and the coil are first coupled to the wheel body in such an arrangement that they spin in the same direction with the wheel body whereas the planetary gears are linked by the solar gear to rotate and the driven gear is also linked to rotate in an opposite direction. The magnet coupled on the driven gear rotates with the driven gear at the same time.

Abstract: An accelerating device for a scooter includes a platform, a pedal, an elastic member, a sector gear, a transmission gear, a shaft, a one-way ratchet gear set, an accelerating gear set, and a rear wheel. The rear end of the platform is secured with the elastic member and one end of the pedal. The pedal has an extension board from one end to secure with the sector gear. The sector gear meshes with the transmission gear, which is then pivoted with the shaft. The transmission gear links with the ratchet gear set, which then links with the accelerating gear set and the rear wheel, thus, when stepping on the pedal, the sector gear activates the transmission gear, the ratchet gear set, the accelerating gear set, and the rear wheel subsequently.

Abstract: A roller skate with a micro adjustment device includes a wheel frame, a quarter and a vamp. Two side boards of the wheel frame have a first chain and a slot. Two side boards of the vamp has a third chain and a guiding hole. The top end of the wheel frame is formed with a second chain. A quick release device is inserted with its shaft through the guiding hole of the vamp and the slot of the wheel frame, the first chain corresponding to the third chain. The shaft has a gear corresponding to the second chain. By tightening and loosening of the quick release device, the gear is adjustable with respect to the second chain, thus the third chain of the vamp is adjustable along the first chain of the wheel frame.

Abstract: A manual min-scooter includes a front fork and a wheelbase at the lower end of a handle tube; a lever extending backwards from a circumferential portion of the front fork; a rear wheel pivoted to the rear end of the lever; and a skateboard placed on the lever; the wheelbase including an axial, two buffer sleeves, a base, a bolt and a nut; two wheels respectively pivoted to two ends of the axial; the bolt penetrating the base and the two buffer sleeves at the middle section of the axial and then locked in place with the nut; and the base connected to the front fork at the lower end of the handle tube to provide for the handle tube linked to the wheelbase the same agility as that by the skateboard while taking a turn.

Abstract: A wheel having an accelerating charger includes a wheel body, a generator unit, an accelerating gear set, and a shaft. The generator unit and the accelerating gear set are coupled in the wheel body by a shaft. The generator unit includes a magnet and a coil. The accelerating gear set has a solar gear, a pair of planetary gears, a gear plate, and a driven gear. The solar gear and the coil are first coupled to the wheel body in such an arrangement that they spin in the same direction with the wheel body whereas the planetary gears are linked by the solar gear to rotate and the driven gear is also linked to rotate in an opposite direction. The magnet coupled on the driven gear rotates with the driven gear at the same time.

Abstract: A scooter folding structure includes a handle tube, a skateboard and a fastener device. The handle tube has a strut at a lower portion. The skateboard has a connecting block at a front end connected with the strut of the handle tube. The strut includes a base having a boss extending upward. The connecting block comprises a pair of connecting parts at a distance with each other. Each connecting part has a position hole thereon. The connecting block has a pair of locating studs on one side thereof. The fastener device comprises a rod, a knob, and a spring. The rod is sleeved with the spring, and then inserted through the boss of the base of the handle tube and connected with the knob. The rod has a threaded section threaded to the position hole of one of the connecting parts.

Abstract: An illumination device for a roller skate includes a base unit, a generator unit, rollers, fasteners and tubes. A pair of conducting plates are secured to the base unit and connected with the generator unit. Each of the fasteners comprises a sleeve and a bolt. Each of the rollers includes an insulating sleeve having a pair of shafts at respective ends. Each roller further includes an illumination element with two electric wires connecting with the two shafts. The sleeve of each fastener is inserted through the tube and the insulating sleeve, and is secured to the base unit by the bolt. The tube is connected with one of the shafts whereas the two conducting plates are connected with the other shaft of the roller and the bolt of the fastener.

Abstract: An exerciser for step and twist includes a base and a swing device secured to the base. The swing device has a pair of pedals which are secured to a post and are linked by a cable to a roller. Two ends of the cable are connected with extensions protruding from the pedals. A spindle of the roller is provided with a gear to mesh with the teeth of a disc on the base. When stepping on the pedals, the cable links the roller to spin, whereas the gear rolls along the teeth of the disc to move the pedals from left to right or vise versa, thus, the exerciser provides a stepping and twisting effect to users.

Abstract: A scooter folding structure includes a frame and a front strut. The frame has a pair of fork boards at the front end, and the front strut comprises a supporting rod protruding from the lower end. The supporting rod has a connecting section pivotally connected to the fork boards of the frame by a pivot. A block with round smooth angles at four ends is secured to the top of a connecting area between the connecting section of the supporting rod and the fork boards of the frame.