Lens barrel having a built-in cam mechanism

Details Lens barrel having a built-in cam mechanism Lens barrel having a built-in cam mechanism

2005-11-01

2005-11-01

Ben, Loha (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S700000, C359S701000, C396S144000

Reexamination Certificate

active

06961189

ABSTRACT:
Sliders of a movable lens holder are provided with cam followers respectively. Each of the sliders engages with a guide opening formed in a lens frame so that the movable lens holder is allowed to move in an optical-axis direction. The movable lens holder is retained in a cam barrel provided with cam grooves, which are formed so as to shift their positions in the optical-axis direction and in a rotational direction of the cam barrel. The cam followers engage with the cam grooves respectively.

REFERENCES:
patent: 5469300 (1995-11-01), Nomura
patent: 5731913 (1998-03-01), Imanari
patent: 5867740 (1999-02-01), Hamasaki
patent: 6195212 (2001-02-01), Miyamoto
patent: 6657795 (2003-12-01), Nishimura et al.
patent: 6747809 (2004-06-01), Yasutomi
patent: 2004/0051972 (2004-03-01), Nomura
patent: 2004/0228006 (2004-11-01), Yasutomi et al.
patent: 4-343309 (1992-11-01), None

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