Lens driving apparatus

摘要

A lens driving apparatus includes a first yoke 7 having an inner peripheral wall 7 a and an outer peripheral wall 7 b placed to be concentric with each other and forming a rectangular U-shape cross section and a cylindrical shape; a second yoke 12 placed at an outer side of the first yoke 7 be concentric with the first yoke 7 and forming a rectangular U-shape cross section and a cylindrical shape; a base 2 ; a first magnet 6 and a first coil 4 arranged in a rectangular U-shape interior of the first yoke 7 ; a second magnet 11 and a second coil 9 arranged in a rectangular U-shape interior of the second yoke 12 ; a first lens support member 5 ; and a second lens support member 10 . The second lens support member 10 is placed at an inner peripheral side of the second yoke 12 and having the second coil 9 fixed onto an outer periphery. The first lens support member 5 is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the first coil 4 . The second lens support member is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the second coil 9.