| 摘要 |
PURPOSE:To simplify the shape of a movable bobbin by constructing to provided a thrust of arcuate motion by a magnetic field of a direction perpendicular to the plane of the motion. CONSTITUTION:A coil 11 which flows a current is wind on a movable bobbin 10. The bobbin 10 is secured to a rotary arm 13 via bolts 12, and journaled via a shaft 14. Permanent magnets 18a, 18b of flat plate shape and yokes 15, 16, 17 for forming a magnetic circuit are disposed in parallel with the rotary plane of an arcuate motion. A motor is used to operate an arcuate motion by controlling the direction and amplitude of a current flowed to the coil 11. |
