JPS59123839U

JPS59123839U - Automatic focusing device for interchangeable lens cameras

Info

Publication number: JPS59123839U
Application number: JP1770283U
Authority: JP
Inventors: 阿部　捷三; 曽我　稔
Original assignee: 京セラ株式会社
Priority date: 1983-02-09
Filing date: 1983-02-09
Publication date: 1984-08-21

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 drawings]

第１図は従来の自動合焦方式を示す構成図、第２図は本
願考案による自動合焦方式を示すブロックダイヤグラム
、第３図は第２図の具体的回路図である。いずれもカメ
ラ本体側の合焦検出機構、合焦駆動機構は公知ないしす
でに提案されているものと同じ機構であるため省略され
ている。ＭＣ・・・・・・カプラ一部、Ｇ・・・・・・直流発電
機、ＡＩ、　　　、Ａ２・・・・・・スイッチ回路部、
ｓｃｌ、ｓｃ２・・・・・・制御回路部、ＥＳ・・・・
・・電源回路部、Ｍ・・・・・・直流モーター、Ｄ・・
・・・・焦点調節機構部、１・・・・・・カメラ側カプ
ラー、２・・・・・・レンズ側カプラー、３・・・・・
・ギヤー、４・・・・・・焦点調節機構、５・・・・・
・交換レンズ、Ｄ１〜Ｄ６・・・・・・ダイオード、Ｒ
１，Ｒ２・・・・・・半固定抵抗器、’ｒｌ、Ｔ２−−
−−−−）ランジスタ、Ｌｍ、Ｌ２・・・・・・リレー
、ｓｌ、ｓ２・・・・・・スイッチ、Ｅｌ、Ｅ２・・・
・・・電池。FIG. 1 is a block diagram showing a conventional automatic focusing system, FIG. 2 is a block diagram showing an automatic focusing system according to the present invention, and FIG. 3 is a specific circuit diagram of FIG. In both cases, the focus detection mechanism and focus drive mechanism on the camera body side are omitted because they are the same mechanisms as those known or already proposed. MC...Coupler part, G...DC generator, AI, , A2...Switch circuit part,
scl, sc2...control circuit section, ES...
...Power circuit section, M...DC motor, D...
... Focus adjustment mechanism section, 1 ... Camera side coupler, 2 ... Lens side coupler, 3 ...
・Gear, 4... Focus adjustment mechanism, 5...
・Interchangeable lens, D1 to D6...Diode, R
1, R2...Semi-fixed resistor, 'rl, T2--
-----) Transistor, Lm, L2...Relay, sl, s2...Switch, El, E2...
···battery.

Claims

[Scope of utility model registration request]

In interchangeable lens cameras, the camera body has a built-in focus detection and focus drive mechanism, and the focus is adjusted by transmitting the focus drive force to the attached interchangeable lens barrel via a mechanical coupler. A part of the mechanical coupler that connects the main body side and the interchangeable lens side, a small DC generator connected to the part of the coupler and generating an output with a polarity depending on the direction of rotation, and an output terminal of the DC generator. a pair of switch circuits, each of which has its input terminal connected to the input terminal thereof, and is actuated by inputting either the positive or negative output of the DC generator, and two sets of batteries connected in series, each of which a power supply circuit section in which each of the pair of switch circuit sections is connected to both ends of the batteries connected in series, and a power supply line of another circuit is connected between both ends of the series-connected batteries; a DC motor; and the switch circuit section. When one of the switch circuits is activated, one of a pair of changeover switches connected to both ends of the DC motor is switched to rotate the DC motor clockwise, and when the other switch circuit is activated, the other changeover switch is switched. a control circuit section in which the pair of changeover switches disconnect the DC motor from the power supply circuit section and short-circuit both terminals thereof when the DC motor is rotated counterclockwise and the switch circuit section does not operate; An automatic focusing device for an interchangeable lens camera that includes a focus adjustment mechanism for a driven lens.