Abstract: The present invention discloses a rear-pedaling standing type bicycle structure having a driving means installed at a front end of a bicycle frame and proximate to a corresponding line of front and rear wheels, and pedals pivotally coupled to both lateral sides of the front end of the bicycle frame for up and down movements. The driving means can be driven up and down alternately by the left and right pedals, and a link wheel is provided for transmitting kinetic forces to the rear wheel to drive the bicycle, so that the bicycle can be operated and driven in a special unique way to achieve the effects of expanding the exercising range and giving more fun to the exercise and game.

Abstract: A stepper including one short post extending downwardly from a toe end of each of two pedals and a sleeve being provided on a tail end of each short post. Both pedals being respectively mounted to a front lateral lever located on a bottom of a base. Both ends of the lever are capped. Both pedals alternatively swinging up and down with the lever as the axis allowing a wider swing angle for both pedals to effectively reduce the height of the base subject to force.

Abstract: The present invention relates to an improved rowing exercise device includes one base, two rowing widgets, one driving widget, one footrest widget, one hoisting widget and one cushion. Making use of the driving widget to drive rowing widget, footrest widget and hoisting widget synchronously, operator, who sits on the cushion and stays on the hoisting widget, will be able to operate rowing handle to practice rowing action with hands and his feet will co-operate with the action of sway-forward and sway-backward of the footrest widget to practice stretching-and-bending exerting action at the same time; moreover, hoisting widget can load the operator's body up and down synchronously. By means of harmony-operation, not only the purpose of stretching and exercise hands, feet belly and thorax can be reached, but also improves the effect of reality and fun of rowing sport.

Abstract: A reciprocal upward and downward pedaling bicycle structure includes a main shaft of a free wheel at a chain wheel shaft, a driving body pivotally coupled to a frame of the main shaft, a pedal crank and a support rod on the driving body, and a driving belt linked to the main shaft and the support rod. An end of the driving belt is dragged to the frame by a resilient element. By the action of the resilient element ands the rotation of the main shaft, the crank and pedal are pulled by the driving belt to provide an upward bounce and the chain wheel drives the rear wheel shaft through the main driving belt. When the pedal is stepped downward, the main shaft and the chain wheel are rotated synchronously to drive the rear wheel of the bicycle to move forward.

Abstract: An oscillated fitness bicycle structure includes a first driving apparatus and a second driving apparatus installed on a base, an eccentric portion on the first driving apparatus, a driving rod integrated to a handle support rod and disposed on a saddle support rod, a back-and-forth oscillation rod connected to the handle support rod and saddle support rod, and a resilient element for providing upward bounces anytime. When an exerciser sits on the saddle, the body weight of the exerciser pushes the saddle support rod downward and two driving rods drive a driving wheel of the first driving apparatus and a weight wheel of the second driving apparatus to rotate, such that the handle support rod and saddle support rod can perform leaping back-and-forth, up-and-down and sideway oscillations to provide an exercise similar to a horse riding exercise.

Abstract: A twist stationary bike of a fitness equipment including a pedal driven vertical shaft provided on the bike frame, a turning bar located on a top of the shaft, a seat pivotally connected to an end of the turning bar for a user to sit on and to step on pedals to revolve the vertical shaft for naturally twisting the waist and swinging the buttock of the user to achieve a fitness purpose.

Abstract: A rower is comprised of a seat on a base, a stepper disposed on the other rend of the base and an oar provided between the seat and the stepper, the stepper being linked to the oar by means of a linkage, a return device being disposed between the base and the linkage for the user to sit on the seat to practice rowing and doing the stretching of muscles of the extremities by the resistance from the stepper.

Abstract: The present invention describes a stepper fitness machine that includes a base as its main body, a handle installed on the base, and a pair of pedal transmission mechanisms pivotally coupled to the base and moves reciprocally up and down. The foregoing components constitute the main body of the stepper fitness machine for an exerciser to simulate stepping and treading movements. A linked handlebar is pivotally coupled to the base and driven by two pedal transmission mechanisms to swing the linked handlebar rapidly back and forth, and a massage belt is installed on the linked handlebar and provided for the exerciser to wear, such that high-speed vibrations and massages are produced on the exerciser's body where the massage belt is worn.

Abstract: A ball positioning structure on which a ball is placed comprises a lower body; an upper body placed on the lower body; a slide device provided in between the lower body and the upper body such that the lower body and the upper body are mutually rotatable; and a plurality of supports each having a top end and a bottom end, the bottom end being disposed on the surface of the upper body to define a receiving space for placing a ball.

Abstract: A handlebar for two-wheeled vehicle has a channel portion and two bent internal tubes wherein the channel portion has an internal diameter and the two bent internal tubes each have an external diameter slightly smaller than the internal diameter of the channel portion, the two bent internal tubes being disposed within the hollow portion with surfaces of the bent internal tubes in contact with the surface of the channel portion, whereby the thickness of the handlebar is increased in order to enhance the strength thereof.

Abstract: A handlebar for two-wheeled vehicle has a channel portion and two bent internal tubes wherein the channel portion has an internal diameter and the two bent internal tubes each have an external diameter slightly smaller than the internal diameter of the channel portion, the two bent internal tubes being disposed within the hollow portion with surfaces of the bent internal tubes in contact with the surface of the channel portion, whereby the thickness of the handlebar is increased in order to enhance the strength thereof.

Abstract: A ball positioning structure on which a ball is placed comprises a lower body including a round disk with a through-hole in the center thereof, an upper body covered on the lower body and having a bore provided in the center thereof which is in alignment with the through-hole; a bearing disposed in the bore of the upper body such that the upper body and the slide device are mutually rotatable, and a frame, on which a ball is placed, disposed on the surface of the upper body. A user may sit on the ball, press the ball, or lean on the ball and make fixed-point rotation to enhance enjoyment of playing.

Abstract: A stem of a bicycle having an iron member, said stem being made of aluminum and adapted to be fixedly secured to a fork and to clamp a handlebar, comprises a block including a sleeve provided at one end thereof for insertion of the fork of a bicycle and a base provided at the other end thereof, said base defining a semicircular surface; a cover having a semicircular surface which, together with the semicircular surface of the base close around and clamp the handlebar when the cover is secured to the base; and at least one iron member having a semicircular configuration and an inner surfaces and an outer surface, the outer surface being disposed on at least one of the two semicircular surfaces so that the iron member rather than the two semicircular surfaces contacts the handlebar whereby scraping of the at least one of the two semicircular surfaces by the handlebar is prevented.

Abstract: An improved stem for a bicycle comprises a column member having a top end, a first pivot mechanism and a second pivot mechanism which are provided on the two sides of the top end respectively; a sleeve member for fixing a handlebar, having a rod therefrom which defines a third pivot mechanism and a fourth pivot mechanisms on the two sides thereof; respectively and a lateral member including a left connecting part and a right connecting part wherein each of the left and right connecting part has two ends each having a protruded engaging mechanism adapted to be pivotally attached to the first, second, third and fourth pivot mechanisms so that the lateral member can be pivotally adjusted through the first and second pivot mechanisms, and the sleeve member can be pivotally adjusted through the third and fourth pivot mechanisms.

Abstract: An improved stem for a bicycle comprises a pivot member having a lateral member and a locking member attached to the underside of the lateral member, wherein the pivot member has two free ends each having a pivot portion and the locking member has two free ends as well; a column member having a first connecting mechanism at the top thereof for pivotally connecting to the pivot portion; and a sleeve member securing a handlebar, and being provided with a second connecting mechanism at the free end thereof for pivotally connecting the other pivot portion of the pivot member, whereby the locking member can be operated to move so that each free end thereof is fixedly attached to or detached from the first connecting mechanism and the second connecting mechanism so as to achieve the adjustment of the angle between the column member and the pivot member, and the angle of the handlebar, at the same time.

Abstract: An adjustable stem member comprises a vertical tube having a projected portion at one end thereof and a horizontal tube to be rotatably pivoted to the projected portion through a connecting mechanism at one end thereof. The connecting mechanism includes two tubular walls, an end wall and a space defined by the tubular walls and the end wall. A lower locking mechanism includes an upper locking block, a locking block and a bolt. The locking blocks are suitably disposed within the space. When the horizontal tube is adjusted to a suitable angle, the locking blocks are forced to press the end wall of the horizontal tube and the projected portion of the vertical tube.

Abstract: A seat post with an offset of a bicycle includes a tube member. A clamp base is attached to the tube member. A lower clamp is disposed to the clamp base. An upper clamp is disposed to the lower clamp. An adjusting mechanism includes a first bolt member and a second bolt member. The first bolt member further includes a plurality of projected ribs at its outer wall. A spur wheel having a center hole is mounted on the outer wall ribs of the first bolt member and is rotatably disposed inside the clamp base. The second bolt member is disposed opposite to the first bolt member. By this arrangement, the upper clamp member and the lower clamp member are jointly fastened to the clamp base by the first and the second bolt members and an adjustment can be made easily by the help of the spur wheel.

Abstract: A locking mechanism comprises a bicycle fork tube which is rotatably received in a bicycle head tube. This fork tube has a plurality of elongate slots at its tubular wall below the top end portion. A stem member has a collar thereof which is removably enveloped around the top end portion of the bicycle fork tube. A tubular housing containing an actuating block and wedge members is removably received by the fork tube for retaining the stem member to the fork tube thereof.

Abstract: A stopper device comprises a rod member having a diameter which is the same as the outer diameter of the free end of the auxiliary handlebar. The rod member further includes a fastening shaft attached to the lower end portion of the rod member. The fastening shaft can be inserted into the free end of the auxiliary handlebar securing the rod member thereof. A supporting rod member is angularly formed on the upper end of the rod member and provides a solid support to the thumb of the rider.

Abstract: A bottom bracket axle assembly for a pedal powered vehicle provides an axle that includes a spindle at each end for engaging a pedal crank arm. Each spindle includes a bearing support for mounting the axle in a bottom bracket tube having cup-mounted bearings on each end thereof. The axle includes a hollow enlarged diameter central section that may be formed from a seamless tube. Both outer and inner diameters of the central section are greater than an outer diameter of each spindle outward of its bearing supports and the outer diameter of the central section may be sized so that it substantially equals the inner diameter of the cups and bottom bracket. In this instance, a clearance is provided between the inner diameter of the cups and outer diameter of the central section so that free rotation may occur therebetween.