Title: Holding device for a lens of an interchangeable lens assembly

Abstract: A diaphragm linkage device for interchangeable lenses wherein more than three column-shaped guide members with a groove consisting of plastic material with a small friction coefficient are provided around the optical axis of the barrel for the interchangeable lens. A diaphragm linkage ring is adapted in the grooves in such a manner that by means of the guide members the diaphragm linkage ring is carried in the direction of thrust and in the radial direction.

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Inventors: Hashimoto, Shigeru (Yokohama, JP)
Masuda, Akira (Kawasaki, JP)
Mochizuki, Katura (Kawasaki, JP)
Satoh, Akira (Ohme, JP)
Takeuchi, Koshi (Kawasaki, JP)
Oda, Teruhisa (Sagamihara, JP)

Application Number: 940083
Filing Date: 1978-09-06
Publication_date: 1980-10-07
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Class(es): 359/830
Other Classes:
US Patent Ref:

2095657

Oct, 1937

Burgess

350/252.

Other Refs: 12620412129746339046

Feb, 1968	DE
Dec, 1972	DE
Jul, 1959	CH

Primary Examiner: Evans, F. L.
Assistant Examiner:
Attorney: Toren, McGeady and Stanger