ELECTROMAGNETIC DRIVING DEVICE

摘要

The present invention aims to provide an electromagnetic driving device capable of efficiently driving swinging coils and being more miniaturized. A driving coil wound around the Z axis taken as a direction of the optical axis of a lens is mounted on a lens support. Magnets are mounted in an inner side box body for supporting the lens support to be capable of moving in the direction of Z axis. The swinging coils are mounted in an outer side box body for supporting the inner side box body to be capable of swinging in the direction orthogonal to the Z axis. The swinging coils includes a first to a fourth coils wound around axes orthogonal to the Z axis. The magnets include a plurality of magnet pieces configured opposite to the swinging coils.

主权项

1. An electromagnetic driving device, comprising:
a lens support configured for retaining a lens; an inner side box body configured for supporting the lens support to be capable of moving in a direction of Z axis parallel to an optical axis of the lens; an outer side box body configured on the outer side of the inner side box body in a manner of surrounding the inner side box body so as to support the inner side box body to be capable of swinging; a driving coil wound around the Z axis and mounted on the lens support; a plurality of magnets mounted in the inner side box body; and a plurality of swinging coils mounted in the outer side box body; wherein each swinging coil comprises a wire wrapping part wound around a axis vertical to the Z axis, and a coil component wound around the wire wrapping part; all of the plurality of swinging coils are configured around the Z axis at equal angles; wherein the plurality of magnets comprise a plurality of magnet pieces configured corresponding to the plurality of coil components and disposed around the Z axis at equal angles; wherein when each magnet piece is observed in a direction vertical to the Z axis, the magnet piece and a corresponding one of the plurality of wire wrapping parts are partitioned at an interval and arranged opposite to each other on an inner side of the corresponding one of the plurality of wire wrapping parts; wherein when each magnet piece is observed in the direction of Z axis, a magnetic pole face, adjacent to a corresponding one of the plurality of coil components and configured closer to the inner side box body than the corresponding one of the plurality of coil components, of the magnet piece and the corresponding one of the plurality of coil components are partitioned at an interval and arranged opposite to each other; or when each magnet piece is observed in the direction of Z axis, the magnetic pole face, adjacent to the corresponding one of the plurality of coil components, of the magnet piece is positioned on the inner sides of the corresponding one of the plurality of wire wrapping parts.