Optical: systems and elements – Lens – With support
Reexamination Certificate
2006-10-20
2008-10-07
Thompson, Timothy J (Department: 2873)
Optical: systems and elements
Lens
With support
C359S822000, C359S826000
Reexamination Certificate
active
07433137
ABSTRACT:
A lens barrel includes a) a plurality of lens groups each having at least one lens, b) a plurality of lens retaining frames, including a retractable lens retaining frame, c) lens retaining frame driving devices, d) a main-guide shaft member in parallel to the optical axis to support the retractable lens retaining frame rotatably in longitudinal and circumferential directions of the main-guide shaft member, and e) a sub-guide shaft member to guide the retractable lens retaining frame along the optical axis and to allow the retractable lens retaining frame to be retracted toward the retracted position at a retracting point on the main-guide shaft member and to guide the retractable lens retaining frame on the main-guide shaft member along the optical axis at other than the retracting point. The retractable lens retaining frame is formed with an engaging portion to engage with the sub-guide shaft member and to be guided along the sub-guide shaft member, and the engaging portion being formed with an opened portion configured to allow the retractable lens retaining frame to be released from the sub-guide shaft member at the retracting point.
REFERENCES:
patent: 7133224 (2006-11-01), Irisawa
patent: 2003-149723 (2003-05-01), None
patent: 2003-315861 (2003-11-01), None
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
Thompson Timothy J
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