Lens driving device for auto-focus camera

Details Lens driving device for auto-focus camera Lens driving device for auto-focus camera

1995-06-29

1997-10-21

Gray, David M.

Photography

With exposure objective focusing means, focusing aid, or...

Dual purpose motor

396133, G03B 1300

Patent

active

056806493

ABSTRACT:
A lens driving device comprises a lens driving member mounted for rotation between an initial position and a preselected focus position, an urging member for urging the lens driving member in a first direction of rotation to control a rotational position of the lens driving member in accordance with the preselected focus position, and a ratchet operably rotatable with the lens driving member. A retaining member is mounted for back and forth rocking movement and has retaining portions for alternate engagement with the ratchet during back and forth rocking movement of the retaining member. A control mechanism controls the rocking movement of the retaining member. A holding member holds the lens driving member from rotation in a second direction of rotation opposite to the first direction of rotation when the lens driving member is in the initial position.

REFERENCES:
patent: 4974006 (1990-11-01), Shinozaki et al.

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