Title:
DIAPHRAGM DEVICE
Document Type and Number:
Japanese Patent JP2021043382
Kind Code:
A
Abstract:
To provide a diaphragm device capable of switching plural kinds of aperture shapes at an arbitrary diaphragm position, while realizing the manual operation of a diaphragm aperture diameter.SOLUTION: A diaphragm device includes: a first group of plural diaphragm blades and a second group of plural diaphragm blades in which a rotation center member and a driving pin are fixed; first to third rotary members; a supporting member supporting the first to third rotary members; and an operating member operating the rotations of the first rotary member. The diaphragm device has switching means coupled with the second to third rotary members so as to rotation-drive them independently from the first rotary member, rotates the second to third rotary members in conjunction with each other, and can switch the first to second groups of plural diaphragm blades forming apertures.SELECTED DRAWING: Figure 1
Inventors:
KAMO DAICHI
Application Number:
JP2019166700A
Publication Date:
March 18, 2021
Filing Date:
September 13, 2019
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/02; G02B7/02; H04N5/225
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa