| 摘要 |
A voice coil actuator is disclosed having a housing, a pole piece, a magnet structure and a coil. The housing is cylindrical and defines a vertical axis. The housing further defines a base portion, an outer wall extending axially from the base portion and a top plate extending radially inward from the outer wall. The base portion defines an annular channel coaxial within the base portion. The pole piece is coaxially disposed within the housing. A gap is defined between the top plate and the pole piece. The coil is moveably suspended coaxially within the gap. The magnet structure is fabricated from rectangular shaped radially magnetized permanent magnets. The magnets are arranged in a polygonal shape and disposed in the channel. |
