Title:
FILTER
Document Type and Number:
Japanese Patent JP2019086585
Kind Code:
A
Abstract:
PURPOSE: To provide a filter which has an impact absorption function on an outer peripheral part of an outer frame, and can cut a female screw for mounting a related component on an inner peripheral part of the outer frame.CONSTITUTION: A filter that is mounted on a front surface of a lens barrel of a digital camera and a digital video camera includes a filter lens, a lens holding frame holding the filter lens, and an outer lens arranged on an outside of the lens holding frame, in which an outer frame is formed of a laminated synthetic resin composed of a plurality of layers, and a synthetic resin layer positioned on an outer peripheral part of the outer frame is composed of a synthetic resin having hardness of Shore A40 to 90 and a synthetic resin layer positioned on an inner peripheral part of the outer frame is composed of a synthetic resin having Rockwell hardness (HR) of R40 to R130.SELECTED DRAWING: Figure 1
Inventors:
KARASAWA YUTAKA
TAKAHASHI KAORU
TAKAHASHI KAORU
Application Number:
JP2017212944A
Publication Date:
June 06, 2019
Filing Date:
November 02, 2017
Export Citation:
Assignee:
MARUMI KOKI KK
International Classes:
G03B11/00
Attorney, Agent or Firm:
Takashi Hatakeyama
Yasuo Fukuda
Yasuo Fukuda