Scrolling device

A scrolling device comprising:

• a first disk, a second disk and a middle disk located between said first and said second disk wherein each of said first and said second disk has a cut out defined in a periphery thereof, a shaft extending through said first disk, said middle disk and said second disk, said shaft having a gear means connected to a distal end thereof which extends from said first disk, each of said first and said second disk, having a control member disposed to an side thereof and located corresponding to said cut out;
• two sets of setting assemblies respectively disposed between said middle disk and said respective one of said first and said second disk, each of said setting assemblies comprising:
• a base gear securely mounted to said shaft and at least a first and a second wheel respectively and freely mounted to said shaft, each one of said wheels having a first side with a toothed periphery and a cam member protruding therefrom, and a second side of said wheel with two teeth extending laterally from a periphery thereof, each of said first and said second wheel having a cavity defined in a peripheral surface thereof;
• a setting member pivotally connected between said middle disk and said respective one of said first and said second disk, two frames extending downwardly from said setting member so that a rod is connected therebetween and at least a first and a second gear are mounted to said rod, said first gear meshed with said base gear and said toothed periphery of said first wheel beside said base gear, said second gear meshed with said toothed periphery of said second wheel wherein said two teeth are able to mesh with said second gear within each revolution of said first wheel, at least two plates extending laterally from said setting member and each of said plates having an engaging portion formed thereto so as to engage with said cam member of said first and said second wheel, a block extending from one end of said setting member and a polygonal recess defined in said end of said setting member;
• a bar having a first end with a polygonal head and a second end with a side plate extending laterally therefrom, said polygonal head received in said polygonal recess of said setting member;
• a positioning member pivotally connected between said middle disk and said respective one of said first and said second disk, at least two studs and a pull plate respectively extending downwardly from said positioning member and a push member extending longitudinally from one of two ends of said positioning member wherein said push member extends through said cut out corresponding thereto;
• and
• a casing rotatably receiving said first disk, said second disk and said middle disk therein and having a toothed inner periphery which is meshed with said gear means.