Lens drive apparatus
AssigneeSeiko Precision Inc.
InventorHisashi Kawamoto
Life of this patent
Estimating the term…
Abstract
A lens drive apparatus includes a lens holder holding a lens, a gear rotated by rotational force of a driving source, and a cam gear meshed with the gear. The lens holder is moved in an optical path direction by the cam gear. The lens holder has an engagement portion engaged with a cam portion of the cam gear and is arranged to move in response to a change in the cam portion in conjunction with the rotation of the cam gear. The cam gear has a teeth portion composed of plural teeth arranged in a circular shape. The teeth portion has an non-meshed portion not meshed with the gear and thicker than other teeth. The number of the pluses or the number of the rotation of the driving source is preset, whereby a position of the lens holder is recognized.
Claims2
A lens drive apparatus comprising:
- a lens holder holding a lens;
- a gear rotated by rotational force of a driving source;
- and
- a cam gear meshed with the gear,
- wherein:
- the lens holder is moved in an optical path direction by the cam gear;
- the lens holder has an engagement portion engaged with a cam portion of the cam gear and is arranged to move in response to a change in the cam portion in conjunction with the rotation of the cam gear;
- the cam gear has a teeth portion composed of plural teeth arranged in a circular shape;
- and
- the teeth portion has an non-meshed portion not meshed with the gear and thicker than other teeth.
Dependencies are inferred from the claim text.