Title:
BLADE DRIVE DEVICE AND IMAGING DEVICE PROVIDED WITH THE SAME
Document Type and Number:
Japanese Patent JP2021144173
Kind Code:
A
Abstract:
To provide a blade drive device that can finely adjust an action speed of blades due to a simple and compact configuration.SOLUTION: A blade drive device 1 comprises: a rear blade drive lever 61 that is rotatable centering around a rear blade drive shaft 12; a rear blade drive spring 62 that urges the rear blade drive lever 61 in a spring drive direction centering around the rear blade drive shaft 12; and a rear blade ratchet member 63 that is rotatable at a prescribed unit rotation angle centering around the rear blade drive shaft 12. The rear blade ratchet member 63 has: a plurality of ratchet teeth 632A and 632B that are formed in an outer peripheral part; and a spring engagement part 634 with which an end part 623 of the rear blade drive spring 62 engages. The blade drive device 1 is provided with: a pawl part 85 that is engageable with the plurality of ratchet teeth 632A and 632B of the rear blade ratchet member 63; and an adjustment screw 90 that has a head part 93 with which an end part 622 of the rear blade drive spring 62 engages, and a shaft part 91 that is screwed into a screw hole 619 so that an insertion length to be inserted into the screw hole 619 of the rear blade drive lever 61 can be adjusted.SELECTED DRAWING: Figure 6
Inventors:
NISHIMURA KOHEI
Application Number:
JP2020043728A
Publication Date:
September 24, 2021
Filing Date:
March 13, 2020
Export Citation:
Assignee:
NIDEC COPAL CORP
International Classes:
G03B9/36; H04N5/225
Attorney, Agent or Firm:
Tomohiro Mori