JPS58135724U

JPS58135724U - Sub-aperture adjustment mechanism of electromagnetic drive shutter

Info

Publication number: JPS58135724U
Application number: JP3084382U
Authority: JP
Inventors: 英夫猪狩; 広畑　道郎
Original assignee: キヤノン株式会社
Priority date: 1982-03-04
Filing date: 1982-03-04
Publication date: 1983-09-12

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例の要部正面図、第２図は従来例による調
節による副絞り開口、受光量、コイル通電の変化図、第
３図は本考案よりなる副絞り調節機構の実施例、斜視図
である。第４図、第５図は本実施例の要部平面図、第６
図は本実施例による調節による副絞り開口、受光量、コ
イル通電の変化図である。１・・・シャッター地板、６・・・セクタレバー、１０
゜１１・・・シャッタ羽根、１５・・田−ター、１８・
・・副絞り、１８ａ・・・測光用開口部、２０・・・受
光素子、２１・・・ライトガイド。第６図　　“ ０第４図Fig. 1 is a front view of the main part of the conventional example, Fig. 2 is a diagram of changes in the sub-aperture aperture, amount of received light, and coil energization due to adjustment according to the conventional example, and Fig. 3 is an embodiment of the sub-aperture adjustment mechanism according to the present invention. FIG. 4 and 5 are plan views of the main parts of this embodiment, and 6.
The figure is a diagram showing changes in the sub-diaphragm aperture, amount of received light, and coil energization due to adjustment according to this embodiment. 1... Shutter base plate, 6... Sector lever, 10
゜11...Shutter blade, 15...Data, 18.
...Sub-diaphragm, 18a...Photometering aperture, 20...Light receiving element, 21...Light guide. Figure 6 “ 0 Figure 4

Claims

[Claims for Utility Model Registration] 1. Utilizing electromagnetic force obtained by energizing a coil placed in a magnetic field, the opening/closing operation of shutter blades is controlled and the amount of light received by a light receiving element for automatic exposure is adjusted. measure. An electromagnetically driven shutter having a sub-diaphragm, wherein the aperture of the sub-diaphragm is movable in a direction substantially perpendicular to the movement direction of a portion of a shutter blade that intersects with the sub-diaphragm. Adjustment mechanism. 2. A part of the photometric aperture formed by the aperture of the sub-diaphragm and a portion of the shutter blade that intersects with the sub-diaphragm is always open, and the area of the photometric aperture is variable. A sub-aperture adjustment mechanism for an electromagnetically driven shutter as claimed in claim 1 of the registered utility model.