Cylindrical molded article, lens barrel, camera, and...

Details Cylindrical molded article, lens barrel, camera, and... Cylindrical molded article, lens barrel, camera, and...

2008-01-29

2010-10-05

Perkey, W. B. (Department: 2862)

Photography

Camera detail

Lens mount

C359S819000, C249S057000

Reexamination Certificate

active

07806607

ABSTRACT:
A drive frame34serving as a cylindrical molded article includes a drive frame main body34a, three first cam grooves34c, three second cam grooves34d, three first gate portions84b, and three high-density regions H. The first gate portions are formed at the end of the cylindrical portion, and are vestiges of gates in injection molding. The high-density regions H are regions in which there is the highest proportion of the axial direction dimension accounted for by the first cam grooves34cand the second cam grooves34dwith respect to the axial direction dimension of the drive frame main body34a. The first gate portions84bare disposed at a location closer to one of two adjacent high-density regions than the other in the circumferential direction of the two adjacent high-density regions H.

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