Nidec Sankyo Corporation

Noboru Ootsuki

Takeshi Sue

Yukio Furuya

A lens drive device may include a movable body having a lens and a coil, a support body movably supporting the movable body, a magnetic drive mechanism having a magnet for driving the movable body together with the coil, a restricting member for restricting movement of the movable body due to an electromagnetic force generated when an electric current is supplied to the coil, a magnetic member disposed in the movable body to be magnetically attracted by the magnet. In a non-energized state where the coil is not energized, following relationships are satisfied:

Lens drive device

Lens drive unit is provided with a moving lenticular body (sleeve, etc.) equipped with a lens, a driving mechanism to move the moving lenticular body in the optical axis direction of the lens and a fixed body (yoke, etc.) that supports the moving lenticular body so as to make it movable in the optical axis direction of the lens. The driving mechanism is provided with magnetmagnetized in the direction perpendicular to the optical axis direction of the lens, and multiple coils (first coiland second coil) arranged so that the magnet is present in the optical axis direction of the lens. Either one of the magnet and the multiple coils is installed in the moving lenticular body, and the other in the fixed body. The driving mechanism is provided with a controlling element (flat spring) to control the movement of the moving lenticular body caused by the electromagnetic force when a current is supplied to the multiple coils to generate the electromagnetic force, and magnetic memberis attracted to magnetand is arranged on the opposite side of magnetic memberso as to sandwich one of the multiple coils between magnetic memberand magnet

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Nagano, Japan

Noboru Ootsuki