Voice coil motor

摘要

A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a lens-accommodating, both ends opened cylindrical bobbin and a coil block including a coil wound on a periphery of the bobbin; a stator including a cylindrical yoke formed with a lens-exposing opening, a plurality of magnets disposed inside the yoke and opposite to the coil block, and a magnet fixing member disposed inside the yoke to fix the plurality of magnets; and an elastic member elastically supporting the bobbin.

主权项

1. A VCM (voice coil motor), comprising:
a mover including a bobbin and a coil block on a side of the bobbin; a stator including four flat magnets facing the coil block and a yoke having four pocket units formed on four lateral plates of the yoke, each of the flat magnets being disposed in a respective pocket unit of the four pocket units; a first elastic member coupled to a bottom surface of the bobbin, the first elastic member including a first plate spring and a second plate spring electrically insulated from each other; and a second elastic member coupled to an upper surface of the bobbin, wherein the coil block is inserted from a top of the bobbin and secured by a sill at a bottom side of the bobbin, wherein one end of the coil block is electrically connected to the first plate spring and the other end of the coil block is electrically connected to the second plate spring, wherein each of the pocket units is protruded from a part of the lateral plate to an outward direction, and wherein at least three side surfaces of each of the flat magnets are contacted with the yoke.