JPS5977130U - Camera motor drive circuit - Google Patents
Camera motor drive circuitInfo
- Publication number
- JPS5977130U JPS5977130U JP17105682U JP17105682U JPS5977130U JP S5977130 U JPS5977130 U JP S5977130U JP 17105682 U JP17105682 U JP 17105682U JP 17105682 U JP17105682 U JP 17105682U JP S5977130 U JPS5977130 U JP S5977130U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- motor drive
- power supply
- camera
- control 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.)
- Granted
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Focusing (AREA)
- Lens Barrels (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図は本考案によるモータ駆動回路の制御の対象とな
る自動焦点調節装置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図は本考案によるカメラのモータ駆
動回路の実施例を示す回路図である。第４図は前置増幅
器、モータ駆動電流発生回路、電圧検出回路の詳細な接
続を示す回路図である。第５図は電圧検出回路の動作を
説明するためのグラフである。第６図は本考案によるモ
ー、タドライブ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７図は前記カメラのシステムブロック
図である。
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１．６・・・
クラッチ、７〜８・・・カメラ側歯車、９・・・カメラ
駆動機構、１０゜１１．５ｉ・・・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・・□・ＬＥＤ、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、Ｃ０ＮＴ・・・制御回路、ＭＤ・・・モ
ータ駆動回路、ＴＲ１・・・電源供給遮断用のトランジ
スタ、ＳＣＲ・・・サイリスタ、ＴＲ２・・・トランジ
スタ（ターンオフ用）、４００・・・ＤＣ−ＤＣコンバ
ータ、４０１・・・電圧安定器、４０２・・・ＡＤ変換
器、４０３・・・前置増幅器、４０４・・・モータ駆動
電流発生回路、４０５・・・電圧検出回路、４０６・・
・母線。
■実 願 昭５７−１７１０５６
０出 願 昭５７（１９８２）１１月１２日＠考
案 者 高橋手
岡谷市長地２８００番地株式会社ヤ
シ力内
■出 願 人 株式会社ヤシカ ゛岡谷市長
地２８００番地
４００ ４（Ｑ
、□
１ダ［−一Figure 1 is a block diagram illustrating the principle of an automatic focus adjustment device that is controlled by a motor drive circuit according to the present invention;
The figure 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 a camera motor drive circuit according to the present invention. FIG. 4 is a circuit diagram showing detailed connections of the preamplifier, motor drive current generation circuit, and voltage detection circuit. FIG. 5 is a graph for explaining the operation of the voltage detection circuit. FIG. 6 is a schematic diagram of an automatic focusing camera to which the motor drive circuit according to the present invention is applied. FIG. 7 is a system block diagram of the camera. 1... Motor, 2... Pinion, 3... Reduction gear train, 4... Gear, 5... Clutch gear 1.6...
Clutch, 7-8...Camera side gear, 9...Camera drive mechanism, 10°11.5i...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...□・LED, 3Q...Main lens, 31...Main mirror, 32...Sub-mirror, 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 starting), B...Power battery, MS...
・Main switch, C0NT...Control circuit, MD...Motor drive circuit, TR1...Transistor for cutting off power supply, SCR...Thyristor, TR2...Transistor (for turn-off), 400... DC-DC converter, 401... Voltage stabilizer, 402... AD converter, 403... Preamplifier, 404... Motor drive current generation circuit, 405... Voltage detection circuit, 406...
・Bus line. ■Actual application 1982-171056 0 Application November 12, 1982 @Consideration
Planner Takahashite 2800 Nagachi, Okaya Yashirikiuchi Co., Ltd. Applicant Yashica Co., Ltd. 2800 Nagachi Okaya 400 4 (Q, □ 1 Da
Claims (1)
らの信号により、カメラ機構やカメラのレンズを駆動す
るモータを制御する形式のカメラ等のモータ駆動回路に
おいて、電源電池と、前記電源電池の出力を前記制御回
路に接続する電源保持回路と、前記電源保持回路を介し
て動作電圧が供給される前記制御回路と、前記電源保持
回路を゛介さずに前記電源電池からの電力供給を受は前
記モータに駆動電流を供給するモータ駆動電流発生回路
と、前記制御回路からの信号により前記モータ駆動電流
発生回路にモータ駆動電流を供給させる前置増幅器と、
前記動作電圧が前記制御回路が確実に動作するのに必要
な電圧以下であるか否かを検出し前記電圧以下であると
きに前記前置増幅器を不作動にする電圧検出回路とから
構成したことを特徴とするカメラのモータ駆動回路。In a motor drive circuit for a camera, etc., which controls a motor that drives a camera mechanism or a camera lens using a signal from a control circuit such as a microprocessor installed in the camera, a power supply battery and the output of the power supply battery are a power supply holding circuit connected to a control circuit; a control circuit to which an operating voltage is supplied via the power supply holding circuit; and a power supply to the motor receiving power from the power battery without going through the power supply holding circuit. a motor drive current generation circuit that supplies a drive current; a preamplifier that causes the motor drive current generation circuit to supply a motor drive current based on a signal from the control circuit;
and a voltage detection circuit that detects whether or not the operating voltage is below a voltage necessary for the control circuit to operate reliably, and disables the preamplifier when the operating voltage is below the voltage. A camera motor drive circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17105682U JPS5977130U (en) | 1982-11-12 | 1982-11-12 | Camera motor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17105682U JPS5977130U (en) | 1982-11-12 | 1982-11-12 | Camera motor drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5977130U true JPS5977130U (en) | 1984-05-25 |
| JPH0114005Y2 JPH0114005Y2 (en) | 1989-04-25 |
Family
ID=30373244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17105682U Granted JPS5977130U (en) | 1982-11-12 | 1982-11-12 | Camera motor drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5977130U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515189A (en) * | 1978-07-19 | 1980-02-02 | Minolta Camera Co Ltd | Camera provided with automatic focus controller |
| JPS5692122U (en) * | 1979-12-18 | 1981-07-22 |
-
1982
- 1982-11-12 JP JP17105682U patent/JPS5977130U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515189A (en) * | 1978-07-19 | 1980-02-02 | Minolta Camera Co Ltd | Camera provided with automatic focus controller |
| JPS5692122U (en) * | 1979-12-18 | 1981-07-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0114005Y2 (en) | 1989-04-25 |
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