Polygon magnet structure for voice coil actuator

Details Polygon magnet structure for voice coil actuator Polygon magnet structure for voice coil actuator

1995-12-21

1998-07-28

Spyrou, Cassandra

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335296, 335306, 381199, 381201, H01F 708, H04R 2500

Patent

active

057867410

ABSTRACT:
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.

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