Title:
DIAPHRAGM MECHANISM
Document Type and Number:
Japanese Patent JP2017083727
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lens diaphragm mechanism capable of reducing the size of a lens casing without increasing the number of components of diaphragm mechanism.SOLUTION: The lens diaphragm mechanism is constituted of diaphragm blade of two different types each including shielding protrusions at different part. When opening the diaphragm, the shielding protrusions of two different types, which are formed on each off the two different type diaphragm blades, arranged to be overlapped with each other.SELECTED DRAWING: Figure 1
Inventors:
NAKAI NORIO
Application Number:
JP2015213557A
Publication Date:
May 18, 2017
Filing Date:
October 30, 2015
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/02; G03B9/06; G03B9/10
Attorney, Agent or Firm:
Yukio Takanashi