JPS5977131U - Camera power holding circuit - Google Patents
Camera power holding circuitInfo
- Publication number
- JPS5977131U JPS5977131U JP17105782U JP17105782U JPS5977131U JP S5977131 U JPS5977131 U JP S5977131U JP 17105782 U JP17105782 U JP 17105782U JP 17105782 U JP17105782 U JP 17105782U JP S5977131 U JPS5977131 U JP S5977131U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- control circuit
- camera
- transistor
- holding circuit
- 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)
- Focusing (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図は本考案による電源保持回路で電源の保持遮断の
対象となる自動焦点調節の原理を説明するブロック図、
第２図は前記ブロック図に係る装置の動作を説明するた
めの流れ図である。第３図は本考案による電源保持回路
の実施例を示す回路図である。第４図は本考案による電
源保持回路回路が適用される自動焦点調節カメラの概略
図である。第５図は前記カメラのシステムブロック図で
１・・・モータ、２・・・ピニオン、３・・・減速歯車
列、４・・・歯車、５・・・クラッチ歯車、６・・・ク
ラッチ、７〜８・・・カメラ側歯車、９・・・カメラ駆
動機構、１０゜１１．５１・・・スイッチ、１２・・・
レンズ駆動歯車、１３〜２０・・・レンズ駆動゛側歯車
、２１．２２・・・エンコーダ連結歯車、２３．２４・
・・結合軸、２５・・・ヘリコイド駆動歯車、２６・・
・ヘリコイド、２７・・・ホトトランジスタ、２８−・
・・孔開き円盤、２９・・・ｊＥＤ、３Ｑ・・・主レン
ズ、３１・・・主ミラー、３２・・・副ミラー、３３・
・・測距用センサ、３４・・・カップリング、５０・・
・レリーズボタン、５２・・・パワーホールド部、５３
・・・測光ブロック、５４・・・ＡＥ回路、５５・・・
ＣＰＵ、５６・・・測距回路、５８・・・フォーカス表
示部、５９・・・ゲート、６０・・・ＡＥ表示部、６１
・・・露出制御回路、７０・・・リモートコントロール
ターミナル、８０・・・リモートコントロールプラグ、
Ｄｌ、Ｄ２・・・ダイオード（リモコン用）Ｄ３・・・
ダイオード（起動用）、Ｂ・・・電源電池、ＭＳ・・・
主スィッチ、ＴＲ１・・・電源供給遮断用のトランジス
タ、ＳＣＲ・・・サイリスク、ＴＲ２・・・トランジス
タ（ターンオフ用）、４００・・・ＤＣ−ＤＣＣコンパ
−，４０１・・・電圧安定器、４０２・・・ＡＤ変換器
、４０３・・・前置増幅器、４０°４・・・モータ駆動
電流発生回路、４０５・・・電圧検出回路、４０６・・
・母線。
−Ｉ＋−−“０°１−１
話−ｕｔ−一−−
げ「加FIG. 1 is a block diagram illustrating the principle of automatic focus adjustment, which is subject to power holding/cutting in the power holding circuit according to the present invention;
FIG. 2 is a flowchart for explaining the operation of the apparatus according to the block diagram. FIG. 3 is a circuit diagram showing an embodiment of the power supply holding circuit according to the present invention. FIG. 4 is a schematic diagram of an autofocus camera to which the power supply holding circuit according to the present invention is applied. FIG. 5 is a system block diagram of the camera. 1... Motor, 2... Pinion, 3... Reduction gear train, 4... Gear, 5... Clutch gear, 6... Clutch, 7-8...Camera side gear, 9...Camera drive mechanism, 10°11.51...Switch, 12...
Lens drive gear, 13-20... Lens drive side gear, 21.22... Encoder connection gear, 23.24.
...Connection shaft, 25... Helicoid drive gear, 26...
・Helicoid, 27... Phototransistor, 28-・
... Perforated disk, 29 ... jED, 3Q ... main lens, 31 ... main mirror, 32 ... submirror, 33 ...
...Distance sensor, 34...Coupling, 50...
・Release button, 52...Power hold part, 53
...Photometric block, 54...AE circuit, 55...
CPU, 56... Distance measurement circuit, 58... Focus display section, 59... Gate, 60... AE display section, 61
...Exposure control circuit, 70...Remote control terminal, 80...Remote control plug,
Dl, D2...Diode (for remote control) D3...
Diode (for startup), B...Power battery, MS...
Main switch, TR1...Transistor for cutting off power supply, SCR...Sirisk, TR2...Transistor (for turn-off), 400...DC-DCC comparator, 401...Voltage stabilizer, 402... ...AD converter, 403... Preamplifier, 40°4... Motor drive current generation circuit, 405... Voltage detection circuit, 406...
・Bus line. -I+--“0°1-1 Story-ut-1--Ge”K
Claims (1)
制御する形式のカメラの電源保持回路において、電源電
池と、−前記電源電池の一極と前記制御回路間にエミッ
タとコレクタで接続されている電源供給遮断用のトラン
ジスタと、前記トランジスタのベースと前記電源電池の
他極間に接続されたサイリスタと、前記トランジスタの
ベースと前記電源電池の他極間に接続されたスイッチと
、前記電源供給遮断用のトランジスタの前記制御回路側
の端子電圧を前記サイリスタのゲートに接続するターン
オン制御回路と、前記制御回路からの信号で前記サイリ
スクをターンオフさせるターンオフ制御回路とから構成
したカメラの電源保持回路。In a power supply holding circuit for a camera that controls a motor by a signal from a control circuit mounted on the camera, the power supply includes a power supply battery, and - a power supply connected between one pole of the power supply battery and the control circuit by an emitter and a collector. a transistor for cutting off the power supply; a thyristor connected between the base of the transistor and the other pole of the power supply battery; a switch connected between the base of the transistor and the other pole of the power supply battery; and a switch for cutting off the power supply. A power supply holding circuit for a camera comprising: a turn-on control circuit that connects a terminal voltage on the control circuit side of the transistor to the gate of the thyristor; and a turn-off control circuit that turns off the thyristor with a signal from the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17105782U JPS5977131U (en) | 1982-11-12 | 1982-11-12 | Camera power holding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17105782U JPS5977131U (en) | 1982-11-12 | 1982-11-12 | Camera power holding circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5977131U true JPS5977131U (en) | 1984-05-25 |
Family
ID=30373246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17105782U Pending JPS5977131U (en) | 1982-11-12 | 1982-11-12 | Camera power holding circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5977131U (en) |
-
1982
- 1982-11-12 JP JP17105782U patent/JPS5977131U/en active Pending
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