Patent ID: 7396168

Claim:
A rotation system with three degrees of freedom comprising a rotor comprising a part or a whole of a sphere, an indication bar, at least one slider, at least one base, four shafts, six bearings, and three first to third guide rails, wherein said rotor includes said indication bar, said first guide rail is installed on said base by using two said shafts and two said bearings, said second guide rail and said third guide rail are installed on said base by using two remaining said shafts and four remaining said bearings, and at least one said slider is installed on or concatenated with said indication bar, moreover wherein said second guide rail rotates centering around two said shafts supporting said second guide rail, sliding said indication bar along said first guide rail, said first guide rail rotates centering around two said shafts supporting said first guide rail, sliding said indication bar along said second guide rail, and said rotor rotates centering around said indication bar, sliding at least one said slider along said third guide rail.