Patent ID: 8577213
Filing Date: 2013-11-05
Classification: G02B,G03B,H02K

Abstract:
1. A lens driving device for moving a lens in an optical axis direction, comprising: a lens support for supporting a lens in an inner circumference; a fixed member which supports so as to be freely moveable the lens support at an inner circumferential side; a first coil fixed to the lens support and wound around an outer circumference of the lens support in a circumferential direction; at least two second coils fixed on an outer circumferential face of the first coil and disposed with a 90 degree interval in the circumferential direction at the outer circumference of the lens support, the second coils having a toroidal form when seen from a radial direction outer side of the lens support; at least four magnets provided at the fixed member, and provided at a predetermined interval about the circumferential direction of the first coil, each magnet being provided so that an inner circumferential face is the same magnetic pole, and so that the inner circumferential face is opposite an outer circumferential face of the first coil, directly opposite and encompassing an entire toroidal face of a respective second coil and, in addition, is opposite a radial direction outer side face of the lens support at the second coil at the position of providing the second coil; wherein when moving the lens support in the optical axis direction, an electric current flows in the first coil, and when moving the lens support in an X-Y direction orthogonal to the optical axis, a predetermined electric current flows in a predetermined second coil.