JPS606130U

JPS606130U - Focal plane shutter control circuit

Info

Publication number: JPS606130U
Application number: JP9582983U
Authority: JP
Inventors: 彰鈴木; 若園　憲次; 岡嶋　紘一; 斉藤　利久
Original assignee: 日本電産コパル株式会社
Priority date: 1983-06-23
Filing date: 1983-06-23
Publication date: 1985-01-17
Also published as: JPH052897Y2

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図はフィルムカウンタがＳ−〇の時の本考案の制御
回路の初期状態を示す回路図。第２図は第１図の回路の
レリーズボタンの第一段階の作動時の状態を示す回路図
。第３図は第１図の回路のレリーズボタンの第二段階の
作動時の状態を示す回路図。第４図はフィルムカウンタ
が１−３６の時の第１図と同様の回路図。第５図はフィ
ルムカウンタが１−３６の時の第２図に対応する回路図
。第６図はフィルムカウンタが１−３６の時の第３図に対
応する回路図。Ｖｃｃ・・・・・・電劇源、ＳＷ、・・・・・・マグネ
ット附勢スイッチ、ＳＷ２・・・・・・シャツタ幕駆動
スイッチ、８ｗ３・・・・・・巻上げ完了信号スイッチ
、ｓｗ、・・・・・・フィルムカウンタスイッチ、ｌｃ
Ｍｇ・・曲先幕マグネットコイル、２ｃＭｇ・・曲後幕
マクネットコイル、Ｘ　−ＮＯＲ・・・・・・エクスク
ル−ジブノア回路、ＡＮＤ、・・・ＡＮＤ。０９０００．アンド回路、ＮＯＲ，、Ｎ０Ｒ２−−−−
−−／７回路、ＴＲ，・・・ＴＲ１・・曲トランジスタ
、’１１　’２・・・・・・インバータ。補正　昭５８．　７．２５実用新案登録請求の範囲を次のように補正する。Ｏ実用新案登録請求の範囲レリーズ作動の第一段階で切換えられてそれそ糺°シャ
ッタ先幕及び後幕を保持するマグネットを附勢するマグ
ネット附勢スイッチと、レリーズ作動の第二段階で切換
えられて、所定蒔間間隔にてそれぞれシャッタ先幕用マ
グネット及びシャッタ後幕用マグネットを滅勢して先幕
及び後膜を作動させて所定の露光を行わせるシャツタ幕
駆動スイッチと、フィルムの巻上げ開始により切換えら
れ、巻上は完了により復帰状態に切換えられるフィルム
巻上げ完了信号スイッチとを含むフォーカルプレンシャ
ッタの制御回路において、フィルムカウンタがフィルム
巻上げによってＳ−〇の状態からフィルムのａ光可能の
カウント１−３６の状態に巻上げられた時に切換えられ
るフィルムカウンタスイッチを設け、このフィルムカウ
ンタスイッチの切換作動によってフィルムカウンタがＳ
−Ｏを指示する間は常に後幕用マグネットが先幕用マグ
ネットよりも先に滅勢されて後幕を先に作動させてシャ
ッタを閉じ状態に保つように制御回路を構成したことを
特徴とするフォーカルプレンシャッタの空切り制御回路
。FIG. 1 is a circuit diagram showing the initial state of the control circuit of the present invention when the film counter is at S-0. FIG. 2 is a circuit diagram showing the state of the release button of the circuit shown in FIG. 1 during the first stage of operation. FIG. 3 is a circuit diagram showing the state of the release button of the circuit shown in FIG. 1 at the second stage of operation. FIG. 4 is a circuit diagram similar to FIG. 1 when the film counter is 1-36. FIG. 5 is a circuit diagram corresponding to FIG. 2 when the film counter is 1-36. FIG. 6 is a circuit diagram corresponding to FIG. 3 when the film counter is 1-36. Vcc...Electric power source, SW, Magnet energization switch, SW2...Shutter curtain drive switch, 8w3... Winding completion signal switch, SW,・・・・・・Film counter switch, lc
Mg...Track front curtain magnet coil, 2cMg...Track rear curtain magnet coil, X-NOR...Excl-Jibnor circuit, AND,...AND. 09000. AND circuit, NOR,, N0R2---
--/7 circuit, TR, ...TR1... curved transistor, '11 '2... inverter. Amended 1984. 7.25 The scope of claims for utility model registration is amended as follows. Scope of Utility Model Registration Claims A magnet energization switch that is switched in the first stage of release operation and energizes the magnets that hold the leading and trailing shutter curtains, and a magnet energization switch that is switched in the second stage of release operation. and a shutter curtain drive switch that deenergizes the shutter front curtain magnet and the shutter rear curtain magnet at a predetermined interval, respectively, to operate the front curtain and rear curtain to perform a predetermined exposure, and a shutter curtain drive switch that starts winding the film. In the control circuit of the focal plane shutter, which includes a film winding completion signal switch, which is switched to the film winding completion signal switch and which is switched to the return state when the film winding is completed, the film counter changes from the state S-〇 by film winding to the count 1 of the film's a light-enabled state. - A film counter switch is provided which is switched when the film is wound in the state of 36.
-The control circuit is configured so that the trailing curtain magnet is always deenergized before the leading curtain magnet and the trailing curtain is operated first to keep the shutter closed while instructing -O. Focal plane shutter open control circuit.

Claims

[Scope of utility model registration request]

A magnet energization switch that is switched during the first stage of release operation of the release button to energize the magnets that hold the front and rear shutter curtains, respectively, and a magnet energization switch that is switched during the second stage of release operation of the release button, A shutter curtain drive switch that deenergizes the shutter front curtain magnet and the shutter rear film magnet at predetermined time intervals to operate the front curtain and rear shutter film to perform a predetermined exposure, and a shutter curtain drive switch that is switched at the start of film winding. In the control circuit of the focal plane shutter, which includes a film winding completion signal switch that is switched to the return state when winding is completed, the film counter changes from the S-○ state due to film winding to the count 1-36 state in which the film can be exposed. A film counter switch is provided which is switched when the film is wound up, and as a result of the switching operation of this film counter switch, the rear curtain magnet is always deenergized before the front curtain magnet while the film counter indicates S-0. A focal plane shutter blanking control circuit characterized in that the control circuit is configured to operate the trailing curtain first and keep the shutter closed.