Lens body tube

Details Lens body tube Lens body tube

2006-08-08

2006-08-08

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S701000, C359S819000

Reexamination Certificate

active

07088523

ABSTRACT:
A lens body tube configured to support at least one lens inside an inner tube such that the at least one lens can be translated along the optical axis direction of the lens body tube includes a cam ring configured to be rotatably supported around the outer circumferential surface of the inner tube, the at least one lens being configured to be translated along the optical axis direction accompanied by the rotation of the cam ring, a plurality of cams provided on the inner circumferential surface of the cam ring, a plurality of cam followers provided on a lens frame supporting each of the at least one lens, each of the plurality of cam followers being engaged with a corresponding one of the plurality of cams through an opening provided on the inner tube, and a plurality of first protrusions, each of which is formed integrally with a corresponding one of the plurality of cams, and has contact with the outer circumferential surface of the inner tube.

REFERENCES:
patent: 5528430 (1996-06-01), Hamasaki
patent: 6008954 (1999-12-01), Shintani et al.
patent: 6631035 (2003-10-01), Iikawa et al.
patent: 6751032 (2004-06-01), Nomura et al.
patent: 6819502 (2004-11-01), Nomura et al.
patent: 6829103 (2004-12-01), Kobayashi et al.
patent: 6873472 (2005-03-01), Suzuki
patent: 6906871 (2005-06-01), Tanaka et al.
patent: 6909464 (2005-06-01), Nomura et al.
patent: 8304688 (1996-11-01), None
patent: 10-170796 (1998-06-01), None
English Language abstract of JP 8-304688.

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