JPS5935918U - electric shutter circuit - Google Patents
electric shutter circuitInfo
- Publication number
- JPS5935918U JPS5935918U JP9679283U JP9679283U JPS5935918U JP S5935918 U JPS5935918 U JP S5935918U JP 9679283 U JP9679283 U JP 9679283U JP 9679283 U JP9679283 U JP 9679283U JP S5935918 U JPS5935918 U JP S5935918U
- Authority
- JP
- Japan
- Prior art keywords
- time
- circuit
- capacitor
- shutter
- exposure information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
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
第１図は従来の電磁レリーズカメラの電気シャッタ回路
を示す回路図である。第２図は本考案によるカメラの電
気シャッタ回路を示す回路図である。
１・・・電池、２・・・シャッタ操作によってオンとな
る電源スィッチ、３・・・露出チェックスイッチ、４゜
５・・・ダイオード、６・・・測光回路および時定回路
、７・・・シャ゛ツタ制御用トランジスタ、８・・・シ
ャッタマグネット、Ｐｄ・・・受光素子、Ｔ□、 Ｔ２
． Ｔ３． Ｔ、・・・トランジスタ、Ａ１． Ａ２・
・・増幅器、Ａ３． Ａ４・・・電圧比較器、Ｃ１，Ｃ
２，Ｃ３・・・コンデンサ、ｓｗｌ、 ｓｗ２゜■Ｗ３
・・・スイッチ、Ｍｇ・・・シャッタマグネット、Ａ５
・・・高大カイ〕／ピーダンスの表示用回路、ＬＥＤ・
・・表示素子。FIG. 1 is a circuit diagram showing an electric shutter circuit of a conventional electromagnetic release camera. FIG. 2 is a circuit diagram showing an electric shutter circuit of a camera according to the present invention. DESCRIPTION OF SYMBOLS 1... Battery, 2... Power switch turned on by shutter operation, 3... Exposure check switch, 4° 5... Diode, 6... Photometering circuit and time setting circuit, 7... Shutter control transistor, 8... Shutter magnet, Pd... Light receiving element, T□, T2
．． T3. T, . . . transistor, A1. A2・
...Amplifier, A3. A4...Voltage comparator, C1, C
2, C3... Capacitor, swl, sw2゜■W3
...Switch, Mg...Shutter magnet, A5
・・・Kodai Kai]/Peedance display circuit, LED/
...Display element.
Claims (1)
情報に基づいてシャッタ開放時間のｆｉ制御をする回路
を持つ、レリーズ操作時点から一定時間後にシャッタ開
放が行われる電気シャッタ回路において、半導体スイッ
チを介して記憶コンデンサに露出情報が接続される露出
情報を記憶する記憶回路と、前記記憶回路出力より充電
される時定コンデンサを持ち前記時定コンデンサが所定
の電圧に充電されたときに閉成信号を出力する時定回路
と、レリーズ操作を起点として一定時間後に行われるシ
ャッタ開放に同期して前記時定コンデンサの充電を開始
させるトリガスイッチと、レリーズ操作に同期して一定
の時定数で充電されるコンデンサに入力端子が接続され
ており、順次反転させられる電圧比較器をもち、先に反
転させられる電圧比較器により活性化信号を発生し、つ
いで反転させられる電圧比較器により前記露出情報を記
憶する記憶回路の記憶を固定する半導体時限スイッチ回
路と、シャッタ閉成制御マグネットに直列に接続され、
前記半導体時限スイッチ回路の出力と前記時定回路出力
が制御電極に接続され、前記活性化信号で導通し、前記
閉成信号により不導通となる半導体素子とを設けて構成
したことを特徴とする電気シャッタ回路。In an electric shutter circuit that stores exposure information starting from a release operation and controls the shutter opening time based on the exposure information, the shutter is opened a certain period of time after the release operation. and a storage circuit for storing exposure information in which exposure information is connected to a storage capacitor, and a time-setting capacitor that is charged from the output of the storage circuit, and outputs a closing signal when the time-setting capacitor is charged to a predetermined voltage. A time constant circuit that outputs an output, a trigger switch that starts charging the time constant capacitor in synchronization with the shutter opening that occurs after a certain period of time from the release operation, and a trigger switch that starts charging the time constant capacitor at a constant time constant in synchronization with the release operation. The input terminal is connected to a capacitor, and the voltage comparator is sequentially inverted, and the voltage comparator that is inverted first generates an activation signal, and the voltage comparator that is then inverted stores the exposure information. It is connected in series with the semiconductor time switch circuit that fixes the memory of the memory circuit and the shutter closing control magnet.
The semiconductor device is characterized in that the output of the semiconductor time switch circuit and the output of the time limit circuit are connected to a control electrode, and includes a semiconductor element which is made conductive by the activation signal and made non-conductive by the closing signal. Electric shutter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9679283U JPS5935918U (en) | 1983-06-23 | 1983-06-23 | electric shutter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9679283U JPS5935918U (en) | 1983-06-23 | 1983-06-23 | electric shutter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5935918U true JPS5935918U (en) | 1984-03-06 |
Family
ID=30230517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9679283U Pending JPS5935918U (en) | 1983-06-23 | 1983-06-23 | electric shutter circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5935918U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418894A (en) * | 1987-07-13 | 1989-01-23 | Mitsubishi Electric Corp | Memory card |
| JPH01112455A (en) * | 1987-10-27 | 1989-05-01 | Mitsubishi Electric Corp | Memory card circuit |
| JPH0289274A (en) * | 1988-04-26 | 1990-03-29 | Mitsubishi Electric Corp | Memory card |
| JPH02299040A (en) * | 1989-05-15 | 1990-12-11 | Seiko Epson Corp | Electronic equipment |
-
1983
- 1983-06-23 JP JP9679283U patent/JPS5935918U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418894A (en) * | 1987-07-13 | 1989-01-23 | Mitsubishi Electric Corp | Memory card |
| JPH01112455A (en) * | 1987-10-27 | 1989-05-01 | Mitsubishi Electric Corp | Memory card circuit |
| JPH0289274A (en) * | 1988-04-26 | 1990-03-29 | Mitsubishi Electric Corp | Memory card |
| JPH02299040A (en) * | 1989-05-15 | 1990-12-11 | Seiko Epson Corp | Electronic equipment |
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