Folding Exercise Bike

Folding exercise bike including a transmission box driven by pedals making a rotating bush at its output shaft drive a universal joint and drive a saddle supporter, thus permitting forward and backward motion of the saddle. Meanwhile, the universal joint drives connecting rods to pull a handle to turn the handle inward and outward, thus making the bike have a multi-functional exercise effect. The main frame, handle supporter and saddle supporter are also capable of being knocked down to reduce the volume of the bike for easy packing, transport and warehousing.

This invention relates to a folding exercise bike, more particularly to an exercise bike with a pedal driven transmission box permitting a rotating bush at its output shaft to drive a universal joint to pull a saddle supporter making forward andbackward motion possible. Meanwhile, the universal joint pulls the handle to permit its inward and outward turning relative to the motion of the saddle, thus allowing the bike to have pedaling, front inclining and breast expanding exercise functions. Again, the main frame, handle supporter and saddle supporter are of a knock down type thus making packing, transport and warehousing easy to save space and cost.

The conventional exercise bike has a simple function for lower limb exercise and therefore, is less effective for body building. An improvement has been proposed to modify the simple function into a multiple one to include pedaling, breastexpanding and arm exercise, such as the same applicant filed on Mar. 13, 1985 as per U.S. Ser. No. 711,142 "Two-Stage Exercise Bike". The complicated structure of such a bike has the defects such as more parts, higher cost, time-consuming assemblyand maintenance, and more chance of mechanical trouble. Another defect of the conventional simple or multiple functional exercise bike is that the fixed structure needs expensive packing, transport and warehousing which incurs more expense and spacerequirement. Manufacturers have been making an effort to overcome such defects but without practical results.

The main object of the present invention is to provide a folding exercise bike to improve the defects of the conventional simple or multiple function exercise bikes, to provide a simple construction, low cost and to have multiple exercisefunctions.

Another object of the folding exercise bike of the present invention is to be able to knock down and fold main parts of the bike frame for easy packing, transport and warehousing so as to save space and cost and to increase competitive ability.

A further object of the present invention is to provide a folding exercise bike having a reduced number of parts so as to decrease the chance of trouble and maintenance difficulty.

This invention makes the use of transmission box, universal joint means and connecting rod to operate the saddle and the handle in a desired manner. The construction of the exercise bike of the present invention is made as simpleas possible. This makes production easier and costs less without hampering the multiple function of the exercise bike for body building purpoes. The bike frame can be removed and folded, and the volume is thus reduced to make packing, transport andwarehousing much easier.

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