JPS6455929U

JPS6455929U -

Info

Publication number: JPS6455929U
Application number: JP15178987U
Authority: JP
Priority date: 1987-10-03
Filing date: 1987-10-03
Publication date: 1989-04-06
Anticipated expiration: 2002-10-03
Also published as: JPH0712975Y2

Description

[Brief explanation of the drawing]

第１図は本考案の１実施例に係るプログラムシ
ヤツタの初期状態を示す平面図、第２図は第１図
に示すプログラムシヤツタの全開状態を示す平面
図、第３図は第１図に示すプログラムシヤツタの
閉鎖状態を示す平面図、第４図は上記シヤツタ機
構中の鉄片レバーと可動鉄片とラチエツトクリツ
ク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図は本考案の制御用フ
ローチヤート、第７図は従来のステツプモータを
駆動源としたレンズ駆動機構付きプログラムシヤ
ツタの平面図。１…羽根駆動リング、１ａ…ギア面、１ｂ…係
止部材、２…アパーチユア、３…モータ軸車、４
，５…歯車、６…レンズ駆動リング、６ｂ…ギア
面、８…ラチエツトホイール、９…ラチエツトク
リツク、９ｂ…係合突起、１２…可動鉄片、１３
…鉄片レバー、１３ｃ…ボス、１５…カム連動レ
バー、１５ａ，１５ｂ…カム面、１７…羽根駆動
リング、１７ａ…ボス。 1 is a plan view showing the initial state of a program shutter according to an embodiment of the present invention, FIG. 2 is a plan view showing the program shutter shown in FIG. 1 in a fully open state, and FIG. 3 is a plan view showing the program shutter shown in FIG. 4 is a plan view showing the closed state of the program shutter shown in FIG. 4; FIG. 4 is a perspective view showing the iron piece lever, movable iron piece, and ratchet click in the shutter mechanism; FIG. 5 is a block diagram of the control system of the present invention. 6 is a control flowchart of the present invention, and FIG. 7 is a plan view of a conventional program shutter with a lens drive mechanism using a step motor as a drive source. DESCRIPTION OF SYMBOLS 1... Vane drive ring, 1a... Gear surface, 1b... Locking member, 2... Aperture, 3... Motor shaft wheel, 4
, 5... Gear, 6... Lens drive ring, 6b... Gear surface, 8... Ratchet wheel, 9... Ratchet click, 9b... Engaging protrusion, 12... Movable iron piece, 13
... Iron piece lever, 13c... Boss, 15... Cam interlocking lever, 15a, 15b... Cam surface, 17... Vane drive ring, 17a... Boss.

Claims

[Scope of Claim for Utility Model Registration] A blade drive ring that is rotationally driven by a step motor and is associated with the shutter blades so that the shutter blades are opened and closed by the rotational movement, and a focus adjustment mechanism that rotates following the blade drive ring. a lens drive ring connected to the lens drive ring; a ratchet wheel connected to the lens drive ring; and a ratchet click driven by a magnet to engage the ratchet wheel, the lens drive ring being in a focus position. In the program shutter with a lens drive mechanism, the latch click is engaged with the ratchet wheel at the timing when the shutter blade reaches the shutter blade, and the shutter blade is always biased in the closing direction as a cam member for driving the shutter blade. a cam member, swingably supported on the blade drive ring;
At the time of opening, a relative position with respect to the blade drive ring is fixed by the magnet, and a cam interlocking member is formed with a cam surface that drives the cam member in the opening direction against the biasing force in the closing direction. 1. A program shutter with a lens drive mechanism, comprising: a lever, wherein the shutter blade is actuated in the closing direction by releasing the fixation of the cam interlocking lever by the magnet.