| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator for autofocusing, capable of employing a plate-like permanent magnet, having a yoke for easy positioning and assembling of the permanent magnets. SOLUTION: The actuator for autofocusing comprises an inner cylinder part 301, constituting an insert hole in which the cylindrical part of a holder is inserted, an outer cylinder part 302 provided outside the inner cylinder part 301 with a prescribed gap via a connection part, and a yoke 300 for storing a coil in the space or the prescribed gap. The outer cylinder part 302 is formed into a substantially polygonal cylinder, with a plurality of substantially flat magnet fitting surfaces 303 formed on the inner surface. A near plate-like permanent magnet 41 is fitted to the magnet fitting surfaces 303. Since such a plate-like permanent magnet 41 can be employed, manufacturing cost is reduced, and the positioning and assembling of the permanent magnet are facilitated. COPYRIGHT: (C)2006,JPO&NCIPI |
