Lens barrel and image pickup apparatus

Details Lens barrel and image pickup apparatus Lens barrel and image pickup apparatus

2008-12-02

2010-06-01

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S699000, C359S700000

Reexamination Certificate

active

07729060

ABSTRACT:
An engagement pawl of a linear-movement guide ring engages with an engagement groove of a cam ring, and hence the cam ring is supported by the linear-movement guide ring non-movably in an optical-axis direction. When the cam ring is rotated, a cam pin of a second group moving frame moves in the optical-axis direction along a cam groove formed in an inner periphery of the cam ring. The cam groove includes a plurality of first cam grooves and a plurality of second cam grooves. The engagement groove of the cam ring intersects with the second cam groove. The engagement pawl has a width larger than a groove width of the second cam groove intersecting with the engagement groove.

REFERENCES:
patent: 5262898 (1993-11-01), Nomura
patent: 5293192 (1994-03-01), Akitake et al.
patent: 5589987 (1996-12-01), Tanaka
patent: 2006/0291078 (2006-12-01), Mitani et al.
patent: 2007/0153403 (2007-07-01), Yamazaki
patent: 2001-124972 (2001-05-01), None
patent: 2004-085932 (2004-03-01), None
patent: 2005-227651 (2005-08-01), None
patent: 2007-093999 (2007-04-01), None
patent: 2007-094118 (2007-04-01), None
Japanese Office Action issued Nov. 19, 2009 for corresponding Japanese Application No. 2008-009857.

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