JPH0295018U

JPH0295018U -

Info

Publication number: JPH0295018U
Application number: JP143889U
Authority: JP
Priority date: 1989-01-10
Filing date: 1989-01-10
Publication date: 1990-07-27
Anticipated expiration: 2004-01-10
Also published as: JPH0635225Y2

Description

[Brief explanation of drawings]

第１図は本考案の１実施例に係るステツプモー
タ駆動のプログラムシヤツタの初期状態を示す平
面図、第２図は第１図に示すステツプモータ駆動
のプログラムシヤツタのシヤツタ全開時を示す平
面図、第３図は第１図及び第２図に示すステツプ
モータ駆動のプログラムシヤツタのシヤツタ閉鎖
時を示す平面図、第４図は第１図乃至第３図に示
す機構中のラチエツト係合機構の部分を示す斜視
図、第５図は本考案の制御システムのブロツク図
、第６図は第５図に示す制御システムのフローチ
ヤート。１……主駆動部材、１ｃ……係合片、２……ス
テツプモータ、１６……鉄片レバー１７……マグ
ネツト鉄心、１９……カム連動レバー、１９ａ…
…カム面、２０……羽根駆動カム。 FIG. 1 is a plan view showing the initial state of a step motor-driven program shutter according to an embodiment of the present invention, and FIG. 2 is a plan view showing the step motor-driven program shutter shown in FIG. 1 when the shutter is fully open. 3 is a plan view of the step motor-driven program shutter shown in FIGS. 1 and 2 when the shutter is closed, and FIG. 4 shows the ratchet engagement in the mechanism shown in FIGS. 1 to 3. FIG. 5 is a block diagram of the control system of the present invention, and FIG. 6 is a flowchart of the control system shown in FIG. 5. DESCRIPTION OF SYMBOLS 1...Main drive member, 1c...Engagement piece, 2...Step motor, 16...Iron piece lever 17...Magnetic core, 19...Cam interlocking lever, 19a...
...Cam surface, 20...Blade drive cam.

Claims

[Scope of Claim for Utility Model Registration] A shutter blade that also serves as an aperture blade, a step motor capable of reciprocating rotation, and an engaging piece that is connected to the step motor and reciprocated by the reciprocating rotation of the step motor. a main drive member; a magnet for closing and releasing the shutter blade by a degaussing operation; an iron piece lever that is swingably supported and magnetized by the magnet; a blade drive member that is always biased in the closing direction; and a blade drive member that is swingably supported with respect to the iron piece lever;
One end is engaged with the blade driving member so as to support the urging force in the shutter closing direction applied to the blade driving member, and the blade is engaged with the blade driving member along the passage path of the engagement piece formed on the main driving member. Each of the blade drive members is provided with a cam interlocking lever formed with a cam surface having an inclination so as to swing the blade drive member in the shutter opening direction against the biasing force in the shutter closing direction when the main drive member moves forward, and the magnet 1. A program shutter driven by a step motor, characterized in that when the iron piece lever is released, the blade driving member is swung in the closing direction by a biasing force in the shutter closing direction.