Collapsible lens barrel

Details Collapsible lens barrel Collapsible lens barrel

2005-09-13

2005-09-13

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S699000, C359S700000, C396S349000

Reexamination Certificate

active

06943963

ABSTRACT:
When a wheel is rotated, first inclined portions of end surface cams provided on the wheel push corresponding cam followers formed on a movable cylinder. Accordingly, the movable cylinder holding a photographing lens is extended. Then, when each of the cam followers reaches a first flat portion of the corresponding end surface cam, the movable cylinder is placed in a photographing position. In the photographing position, when the wheel is further rotated, the cam follower is pushed by a second inclined portion of the end surface cam. The movable cylinder is thus extended. Then, when the cam follower reaches a second flat portion of the corresponding end surface cam, the movable cylinder is placed in a macro photographing position.

REFERENCES:
patent: 4439018 (1984-03-01), Okajima et al.
patent: 4848884 (1989-07-01), Enomoto
patent: 6256063 (2001-07-01), Saito et al.
patent: 6525767 (2003-02-01), Saito et al.
patent: 6856763 (2005-02-01), Allen et al.
patent: 2004/0240874 (2004-12-01), DiRisio
patent: 10-248029 (1998-09-01), None

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