Title:
BLADE DRIVING DEVICE, AND IMAGING DEVICE INCLUDING THE SAME
Document Type and Number:
Japanese Patent JP2023084197
Kind Code:
A
Abstract:
To provide a blade driving device that can detect a position of a blade by a compact structure, and to provide an imaging device including the blade driving device.SOLUTION: A blade driving device 1 comprises: a base plate 10 that has an opening S formed; blades 21 to 28 that are movable so as to open and close the opening S; driving shafts 11 and 12 that are provided in the base plate 10; blade arms 31 to 34 that are configured to be rotatable centering around support shafts 41 to 44, and are coupled to the blades 21 to 28; driving levers 51 and 52 that are configured to be rotatable centering around the driving shafts 11 and 12, and have blade driving units 513 and 523 coupled to the blade arms 31 to 34; sleeves 312 and 342 that are configured to rotate centering around the support shafts 41 and 42 with the blade arms 31 and 34, and have a magnetization part magnetized so that a different magnetization pole is lined along a circumferential direction; and magnet sensors 410 and 420 that detect a change in magnetic field occurring by the magnetization parts of the sleeves 312 and 342.SELECTED DRAWING: Figure 9
Inventors:
KAWAKAMI KENTA
Application Number:
JP2021198226A
Publication Date:
June 19, 2023
Filing Date:
December 07, 2021
Export Citation:
Assignee:
NIDEC PREC CORP
International Classes:
G03B9/36
Attorney, Agent or Firm:
Tomohiro Mori
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