Collapsible exercise bicycle

A collapsible exercise bicycle mainly comprises a front wheel rod, a rear wheel rod and a diagonal rod connecting with the said front wheel rod and the rear wheel rod;

• a handlebar and a front rotary wheel are respectively disposed on the top rim and the bottom rim of the said front wheel rod;
• a real rotary wheel is disposed at the bottom end of the said rear wheel rod and a pair of opposite pedal rods are disposed at the area adjacent to the said rear wheel rod;
• a saddle is mounted on the top rim of the said diagonal rod to thereby comprise a exercise bicycle to allow the user to make forward riding and sliding movements;
• the present invention is characterized that:
• both of the area of the real wheel rod adjacent to the diagonal rod and the area of the said diagonal rod adjacent to the front wheel rod are disposed in two segments;
• the connected ends thereof are respectively disposed with a retaining device;
• wherein, the said retaining device is disposed with a substantially U-shaped fastening base;
• a fastening hole is disposed on the rear rim of the lateral plate of the said fastening base;
• a notch is disposed at the front rim of the horizontal plane;
• a moving piece is disposed with a front and a rear shaft cylinders;
• the said front shaft cylinder is disposed with a notch, thereby through the rear shaft cylinder, the said moving piece is pivotally connected to the fastening holes on the fastening base in a rotary state;
• through the notch, the front shaft cylinder of the moving piece is connected to a screw rod inserted by a spring;
• the other end of the screw rod is disposed with a press bar, thereby the moving piece couples with the fastening base to assemble an exercise bicycle for riding;
• the moving piece detaches from the securing base to make the said rear wheel rod and diagonal rod into a foldable state ready for folding the exercise bicycle into a reduced volume to facilitate transportation, storage or placement in a backpack for carrying.