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US 2010/0149667 A1Published application
Lens driving device
AssigneeNidec Sankyo Corporation
InventorsAkihito Wada, Toshifumi Tsuruta
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Abstract
A lens driving device may include a movable lens body which holds a lens, and a driving mechanism for moving the movable lens body in an optical axis direction. The driving mechanism includes coils attached to the movable lens body, and a magnet opposed to the coils. When a gap between the coils and the magnet is expressed as A, and the width of the coil is expressed as B, a conditional expression of 0.3B≦A≦B is satisfied.
Claims7
A lens driving device comprising:
- a movable body holding lenses;
- a driving mechanism for moving said movable body in an optical axis direction;
- wherein said driving mechanism has coils attached to said movable body and a magnet opposed to said coils;
- in a direction intersecting with said optical axis direction, a gap A between said coils and said magnet and a width B of said coils satisfies the following conditional expression:
- 0.3B≦A≦B.
2 more elements
Dependencies are inferred from the claim text.