JPH0314641U

JPH0314641U -

Info

Publication number: JPH0314641U
Application number: JP7462789U
Authority: JP
Priority date: 1989-06-26
Filing date: 1989-06-26
Publication date: 1991-02-14
Anticipated expiration: 2004-06-26
Also published as: JP2505417Y2

Description

[Brief explanation of drawings]

第１図は本考案の実施例に係る装置のミラー駆
動装置及びフオーカルプレーンシヤツタ駆動装置
の斜視図、第２図は本考案の実施例に係る制御シ
ステムのブロツク図、第３図は本考案の動作タイ
ミングを示すタイムチヤート、第４図は本考案の
制御システムのフローチヤート。ＡＰ……露出用アパーチユア、５……先幕駆動
レバー、７……後幕駆動レバー、８……先幕マグ
ネツト、９……後幕マグネツト、１１……セツト
レバー、１１ｂ……突起、１１ｃ……突起、１１
ｄ……被駆動アーム、１１ｅ……カム縁、１１ｇ
……カム縁、１１ｈ……検出片、１４……ミラー
、１４ｂ……ミラー駆動スプリング、１５……ミ
ラー制御レバー、１７……モータ、２１……カム
ギア、２３……偏心ピン、２４……フオトインタ
ラプタ、２４ａ……発光部、２４ｂ……受光部、
３１……ＣＰＵ、３２……モータドライバ、３３
……ブレーキタイマ、３４……オアゲート、３５
……抵抗。 FIG. 1 is a perspective view of a mirror drive device and focal plane shutter drive device of an apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a control system according to an embodiment of the present invention, and FIG. A time chart showing the operation timing of the invention; FIG. 4 is a flowchart of the control system of the invention. AP...Exposure aperture, 5...Front curtain drive lever, 7...Rear curtain drive lever, 8...Front curtain magnet, 9...Rear curtain magnet, 11...Set lever, 11b...Protrusion, 11c... protrusion, 11
d...Driven arm, 11e...Cam edge, 11g
...Cam edge, 11h...Detection piece, 14...Mirror, 14b...Mirror drive spring, 15...Mirror control lever, 17...Motor, 21...Cam gear, 23...Eccentric pin, 24...Photo Interrupter, 24a... light emitting section, 24b... light receiving section,
31...CPU, 32...Motor driver, 33
...Brake timer, 34...Or gate, 35
……resistance.

Claims

[Claims for Utility Model Registration] A driven member movable between an initial position and a forward limit, an elastic member that biases the driven member from the initial position toward a forward limit, and rotation of a motor is transmitted. The first rotation area and the second rotation area are alternately repeated by rotating in one direction, and the elastic material is loaded with energy by rotating from the first rotation area to the second rotation area. while returning the driven member from the forward limit toward the initial position and stopping in the second rotation region, thereby mechanically engaging the driven member at the initial position, and moving the driven member from the second rotation region to the first rotation region. By rotating toward a rotational region of and a position detection means whose output is reversed depending on whether the driven member is at the initial position or not at the initial position, and the rotation is performed in synchronization with the reversal of the output of the position detection means. A driving device for a photographing optical path opening/closing device configured to control stop timing of a member, comprising a current switching means for switching a current value of a driving current of the motor, and an output of the position detecting means at the time of starting energization to the motor. A drive device for an optical path opening/closing device for photographing, characterized in that the current switching means is switched accordingly so that a larger drive current is supplied to the motor during a charge operation than during a release operation.