LENS DRIVING DEVICE WITH SHAKING CORRECTION FUNCTION

摘要

The present invention provides a lens driving device with a shaking correction function, which does not need magnets for position detection and also cannot reduce driving force during swinging. The lens driving device is configured as follows: a square frame shaped magnet support, each magnet is a cylinder in an isosceles trapezoid shape and is mounted in a corresponding corner in a manner that its long base faces the center of the magnet support, one or two X-direction magnetic force detection mechanisms have detection sensitivity for X-axis direction components of magnetic induction intensity and are mounted on the outer side of the corresponding magnets in a Y-axis direction, and one or two Y-direction magnetic force detection mechanisms have detection sensitivity for Y-axis direction components of magnetic induction intensity and are mounted on the outer side of the corresponding magnets in an X-axis direction.

主权项

1. A lens driving device with a shaking correction function, configured for driving a lens or a lens assembly, an optical axis of the lens or the lens assembly is taken as a Z-axis and two mutually orthogonal axes which are orthogonal with the Z-axis are taken as an X-axis and a Y-axis respectively, the lens driving device comprising:
a focusing unit, comprising: a lens support configured for maintaining the lens or the lens assembly; a focus coil wound around the Z-axis direction and sleeved on the lens support; a magnet support; a plurality of magnets received in the magnet support and configured opposite to the focus coil with an interval in a radial direction of the lens or the lens assembly; and a suspension supporting mechanism connected between the lens support and the magnet support and configured for supporting the lens support to move in the Z-axis direction; and a hand shake correcting unit, comprising: a base station; a plurality of magnetic force detection mechanisms mounted on the base station; a plurality of correction coils each of which is wound around an axis parallel to a Z axis and is configured opposite to a corresponding one of the plurality of magnets with an interval along the Z-axis direction; and a swing supporting mechanism connected between the base station and the focusing unit and configured for supporting the focusing unit to swing in directions orthogonal with the Z axis; wherein when being observed in the Z-axis direction, each magnet is an isosceles trapezoid with its long base facing a center of the magnet support, the magnet support is substantially a square frame body, four corners of the frame body are positioned in the X-axis direction and the Y-axis direction respectively, and the magnets are mounted at the four corners of the magnet support; wherein the plurality of magnetic force detection mechanisms comprise: one or two X-direction magnetic force detection mechanisms having detection sensitivity for X-axis direction components of magnetic induction intensity and mounted in the Y-axis direction, and each being configured on an outer side of a corresponding one of the plurality of magnets in the radial direction of the lens or the lens assembly; and one or two Y-direction magnetic force detection mechanisms having detection sensitivity for Y-axis direction components of magnetic induction intensity and mounted in the X-axis direction, and each being configured on an outer side of a corresponding one of the plurality of magnets in a radial direction of the lens or the lens assembly.