| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens drive device having large driving force generated in a coil.SOLUTION: In a lens drive device (1), side panels of an auto-focus actuator (2) provided in an optical axis direction are fixed with yokes (14a-14d) connecting upper surfaces of upper magnets (151) and lower surfaces of lower magnets (152) in pairs of magnets (15a-15d) arranged with their identical poles facing each other, an outer case is fixed with cyclic coils (16a-16d) arranged to pass through between the pairs of magnets, inner peripheral parts of the cyclic coils are inserted with protrusions (143) provided on the yokes and spaced from the pairs of magnets, the protrusions (143) are magnetically connected to the yokes (14a-14d), and an internal surface of the outer case facing one end of the yokes in an optical axis direction is fixed with a magnetic metal plate attracting the upper magnets. |
