Projector with improved focus ring

Details Projector with improved focus ring Projector with improved focus ring

2005-03-22

2005-03-22

Nguyen, Judy (Department: 2851)

Optics: image projectors

Lens support

Lens position adjustable

C353S119000, C359S830000, C359S808000

Reexamination Certificate

active

06869192

ABSTRACT:
A rib, provided on an outer periphery of a projection ring, includes: a first rib extending along a direction in which an optical axis of a lens main body extends (an attachment direction of a focus lens); and a second rib, brought into contact with one end of first rib, extending along a direction approximately orthogonal to first rib so as to have one side and the other side. On the other hand, a protrusion, provided on an inner periphery of the cylindrical focus ring, includes a pair of protrusion parts arranged with a spacing in a direction in which an optical axis extends. With this structure, it is possible to obtain a projector having a focus ring capable of being easily attached to a lens main body and being easily molded.

REFERENCES:
patent: 4154510 (1979-05-01), Katagiri
patent: 5737119 (1998-04-01), Mladjan et al.
patent: 5940228 (1999-08-01), Burnett
patent: 6364491 (2002-04-01), Okada et al.
patent: 6536906 (2003-03-01), Fujimori et al.
patent: 6573950 (2003-06-01), Hirata et al.
patent: 2001-215382 (2001-08-01), None
patent: 2002-107611 (2002-04-01), None
Patent Abstracts of Japan, Publication No. 2001215382 A, Publication Date Aug. 10, 2001, 1 page.
Japanese Search Report dated Oct. 1, 2002 with English translation, 5 pages.
Patent Abstracts of Japan, Japanese Application No: 2002-107611; Publication Date: Apr. 10, 2002, 2 pages.

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