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Title:
FILTER
Document Type and Number:
Japanese Patent JP2019086584
Kind Code:
A
Abstract:
PURPOSE: To provide a filter which is further advantageous in a material cost by easily cutting a female screw for mounting a related component to a member forming a filter frame, has an impact absorption function and can sufficiently protect a filter lens.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, and a filter frame holding the filter lens, in which the filter frame includes a lens holding part and an outer frame part extending to the outside of the lens holding part, the lens holding part includes a male screw part for being mounted to the lens barrel, a female screw part for mounting a related component is provided on the inner peripheral part of the outer frame part, and the filter frame including the lens holding part and the outer frame part or the outer frame part in the filter frame is formed of a synthetic resin having Rockwell hardness (HR) of R40 to R130.SELECTED DRAWING: Figure 1

Inventors:
唐澤 豊
高橋 薫
Application Number:
JP2017212939A
Publication Date:
June 06, 2019
Filing Date:
November 02, 2017
Export Citation:
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Assignee:
マルミ光機株式会社
International Classes:
G03B11/00
Attorney, Agent or Firm:
畠山 隆
福田 保夫



 
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