Galvano Mirror unit

Abstract

A galvano mirror unit is provided with a galvano mirror, a rotor to which the galvano mirror is mounted and a stator that rotatably supports the rotor about a rotation axis. A pair of center pins is provided to either the rotor or the stator and a pair of receive members is provided to the whichever of the rotor and the stator is not provided with the center pins. The receive members receive the center pins. A pair of driving magnets is provided at opposing ends of the rotor and a pair of driving coils is provided to the stator, the pair of driving coils being faced with the driving magnets respectively. Each of the pair of driving magnets includes a section of N-pole and a section of S-pole, and both the N-pole section and the S-pole section of each driving magnet face the same driving coil.

What is claimed is:  
     
         1 . A galvano mirror unit, comprising: 
 a galvano mirror;    a rotor to which said galvano mirror is mounted;    a stator that rotatably supports said rotor about a rotation axis;    a pair of center pins provided to one of said rotor and said stator;    a pair of receive members provided to the other of said rotor and said stator, said receive members respectively receiving said center pins;    a pair of driving magnets provided at opposing ends of said rotor; and    a pair of driving coils provided to said stator, said pair of driving coils being faced with said driving magnets respectively;    each of said pair of driving magnets including a section of N-pole and a section of S-pole, both the N-pole section and the S-pole section of each driving magnet facing the same driving coil.    
     
     
         2 . The galvano mirror unit of  claim 1 , wherein said center pins are provided to said rotor, while said receive members are provided to said stator.  
     
     
         3 . The galvano mirror unit of  claim 1 , wherein said center pins are provided to said stator, while said receive members are provided to said rotor.  
     
     
         4 . A galvano mirror unit, comprising: 
 a galvano mirror;    a rotor to which said galvano mirror is mounted;    a stator that rotatably supports said rotor about a rotation axis;    a pair of center pins provided to one of said rotor and said stator;    a pair of receive members provided to the other of said rotor and said stator, said receive members respectively receiving said center pins; and    first and second driving coils provided to said stator, wherein said rotor has first and second sides that are respectively faced with said first and second coils, said first and second sides being magnetized;    each of first and second sides of said rotor includes sections of N-pole and S-pole, both the N-pole section and the S-pole section of each side of said rotor is faced with the same driving coil.