Lens drive mechanism

Details Lens drive mechanism Lens drive mechanism

2006-08-29

2006-08-29

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S694000, C359S823000

Reexamination Certificate

active

07099088

ABSTRACT:
A lens drive mechanism includes a rotatable lead screw driven to rotate about an axis thereof, the axis extending parallel to an optical axis of a lens group; a non-rotatable guide shaft which extends parallel to the rotatable lead screw; a nut member made of synthetic resin which includes a screw engaging portion, with which the rotatable lead screw is screw-engaged, and a rotation-prevention portion, which is engaged with the non-rotatable guide shaft to prevent the nut member from rotating about the rotatable lead screw; and a lens support frame which supports the lens group and is movable together with the nut member in an optical axis direction. The rotation-prevention portion of the nut member includes a pair of holding portions which are formed integral with the nut member so as to resiliently contact the non-rotatable guide shaft.

REFERENCES:
patent: 5966248 (1999-10-01), Kurokawa et al.
patent: 6501604 (2002-12-01), Onda
patent: 6599035 (2003-07-01), Ichinokawa
patent: 6714357 (2004-03-01), Yamazaki
patent: 6795251 (2004-09-01), Nomura et al.
patent: 6813441 (2004-11-01), Yamazaki
patent: 2003-131111 (2003-05-01), None
patent: 2003-222932 (2003-08-01), None
patent: 2004-070014 (2004-03-01), None
English language Abstract of JP 2004-070014.
English language Abstract of JP 2003-131111.

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