Title:
AMOUNT-OF-LIGHT ADJUSTMENT DEVICE
Document Type and Number:
Japanese Patent JP2015079197
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an amount-of-light adjustment device that suppresses deformation of springs and can be easily assembled.SOLUTION: An amount-of-light adjustment device comprises: a winding part 15c; a torsion spring 15 composed of arm parts 15a and 15b extending from each of both ends of the winding part; a blade member 13 that has an engagement part 13e engaging with one arm part 15a of the torsion spring, and forms an aperture 10a; a protrusion-shape shaft part 14e placed within the winding part; a protrusion-shape engagement holding part 14df that holds the engagement by rotating the other arm part 15b of the torsion spring for giving urging force to the blade member after the winding part is engaged with the shaft part and the one arm part is engaged with the blade member; an inclination surface part 14da that, in the course of the other arm part being engaged, is abutted on the other arm part and slid, guides the other arm part from an end surface of the winding part where the one arm part is present to an end surface of the winding part where the other arm part is present, and is provided in a side part of the engagement holding part; and an urging arm lock part 14d that prevents disengagement from the engagement holding part of the other arm part, and includes an eaves-like omission prevention part 14dc provided in a protrusion part tip of the engagement holding part.
Inventors:
HAYASHI OSAMU
Application Number:
JP2013217377A
Publication Date:
April 23, 2015
Filing Date:
October 18, 2013
Export Citation:
Assignee:
OLYMPUS IMAGING CORP
International Classes:
G03B9/02; G03B9/06
Attorney, Agent or Firm:
Susumu Ito
Yasushi Hasegawa
Osamu Shinoura
Yasushi Hasegawa
Osamu Shinoura
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