Lens drive unit

Details Lens drive unit Lens drive unit

2007-11-20

2007-11-20

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With support

C359S822000, C359S823000, C359S824000

Reexamination Certificate

active

11273005

ABSTRACT:
Lens drive unit is provided with a moving lenticular body (sleeve15, 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 (yoke16, 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 magnet17magnetized in the direction perpendicular to the optical axis direction of the lens, and multiple coils (first coil14and second coil14′) 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 spring13, 13′) 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 member30is attracted to magnet17and is arranged on the opposite side of magnetic member30so as to sandwich one of the multiple coils between magnetic member30and magnet17.

REFERENCES:
patent: 2003/0012090 (2003-01-01), Kawano

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