Collapsible lens barrel

Details Collapsible lens barrel Collapsible lens barrel

2004-08-30

2008-12-09

Perkey, W. B. (Department: 2862)

Photography

Having variable focal length of camera objective

C396S344000, C396S349000, C359S699000, C359S700000, C359S701000, C359S823000

Reexamination Certificate

active

07463824

ABSTRACT:
A cam pin (16) and a demating prevention pin (35) that are provided in a driving frame (15) and have an identical shape are allowed to mate with a cam groove (18) and a demating prevention groove (36) that are provided in a cam frame (17), respectively. A first protrusion (37) is provided on at least one side in an optical axis direction of a portion of the demating prevention groove (36) with which the demating prevention pin (35) mates when the driving frame (15) is advanced. When an external force is applied to the driving frame (15), a cylindrical portion (35f) of the demating prevention pin (35) and the first protrusion (37) come into contact with each other. This prevents the cam pin (16) from demating from the cam groove (18). The cam pin (16) and the demating prevention pin (35) are made of common components, making it possible to reduce the number of components.

REFERENCES:
patent: 5765048 (1998-06-01), Nomura et al.
patent: 6606206 (2003-08-01), Takeshita et al.
patent: 6714359 (2004-03-01), Kobayashi
patent: 2002/0044363 (2002-04-01), Takeshita et al.
patent: 2001-182722 (2001-06-01), None
patent: 2002-90611 (2002-03-01), None

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