Retractable type lens barrel

Details Retractable type lens barrel Retractable type lens barrel

2008-01-29

2008-01-29

Hasan, M. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S701000

Reexamination Certificate

active

11342500

ABSTRACT:
A lens barrel for zooming in the photographing region and retraction to the non-photographing region, equipped with a stationary barrel having a cam groove on the inner circumferential surface thereof, a cam barrel having a cam pin which is engaged with the cam groove, provided on the outer circumferential surface thereof and supported rotatably to the stationary barrel and movably along the optical axis. The inner circumferential surface of the stationary barrel has a first cam groove to be used at least in a part of the photographing region and a second cam groove to be used at least in a part of the non-photographing region, and the outer circumferential surface of the cam barrel has a first cam pin to be engaged with the first cam groove and a second cam pin to be engaged with the second cam groove.

REFERENCES:
patent: 4729644 (1988-03-01), Ueyama
patent: 5172276 (1992-12-01), Ueyama et al.
patent: 5576894 (1996-11-01), Kuwana et al.
patent: 2003-043336 (2003-02-01), None

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