| 摘要 |
PROBLEM TO BE SOLVED: To provide a camera shutter device which stably operates at high speed by rotating a plurality of shutter blades with two rotors simultaneously, and reducing the lengths of the shutter blades. SOLUTION: The shutter blades 3 and 4 are rotatably mounted on shafts 1d and 1e, respectively, and the operation loci of the edges of their leading ends are passed through an opening 1a. The stator of a motor is constituted in such a way that the projecting part 8c of a york 8 having legs 8a and 8b and the projecting part 9c of a york 9 having legs 9a and 9b are superimposed and a bobbin 10 with a coil 11 wound thereround is fitted to the superimposed projecting parts. The stator is also constituted in such a way that the leading ends of the legs 8a and 9a are used as magnetic poles facing the peripheral face of one rotor 6 whereas the leading ends of the legs 8b and 9b are used as magnetic poles facing the peripheral face of the other rotor 7. The output pins 6a and 7a of the rotors 6 and 7 are fitted in the long holes 3a and 4a of the shutter blades 3 and 4, respectively. COPYRIGHT: (C)2006,JPO&NCIPI
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